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1. (−)-Brunneusine, a new phenolic compound with antibacterial properties in aqueous medium from the leaves of Agelanthus brunneus (Engl.) Tiegh (LORANTHACEAE)

Author:
Moifo Kuete Thomas Wieland; Ambassa Pantaleon; Moungang Luciane Marlyse; Ngameni Bathelemy; Storr E. Thomas; Ngadjui Tchaleu Bonaventure; Stephenson G. Richard
Source:
Zeitschrift für Naturforschung 2022 v.77 no.3-4 pp. 157-165
ISSN:
1865-7125
Subject:
Loranthaceae; Senna siamea; antibacterial properties; aquatic environment; ethyl acetate; parasitic plants
Abstract:
... Agelanthus brunneus (Loranthaceae) is a hemiparasitic plant growing on Senna siamea (Fabaceae). The chemical investigation of its leaves and flowers led to the isolation of one new phenolic compound namely (−)-brunneusine (1), together with 13 known compounds. The crude leaves and flowers extracts (CLE and CFLE) with their ethyl acetate fractions (EAFL and EAFFL) and some isolated compounds (1–3; ...
DOI:
10.1515/znc-2021-0143

2. A Ni(II) coordination polymer with dual electrochemical functions: synthesis, crystal structure, hydrogen evolution reaction and l-ascorbic acid sensing

Author:
Geng Zhang; Jianping Dong; Ruixue Li; Qinqin Shen; Kaiyi Li; Xiaoxia Kong; Huilu Wu
Source:
Zeitschrift für Naturforschung 2022 v.77 no.2-3 pp. 171-178
ISSN:
1865-7117
Subject:
X-ray diffraction; ascorbic acid; carbon electrodes; coordination polymers; crystal structure; detection limit; electrochemistry; hydrogen production; ligands
Abstract:
... A two-dimensional Ni(II) coordination polymer (NiCP) of the formula {[NiL(terephthalate)(H₂O)₂]·2H₂O}ₙ (L = bis(1-(pyridin-4-ylmethyl)-benzimidazol-2-ylmethyl)ether), has been obtained from a solvothermal reaction, and characterized by single-crystal X-ray diffraction, elemental analysis, and IR and UV/Vis spectra. The coordinated terephthalate anions and the L ligands connect the Ni(II) ions in t ...
DOI:
10.1515/znb-2021-0185

3. A comprehensive review on the development of probiotic supplemented confectioneries

Author:
Eylül Şenöztop; Tuğçe Dokuzlu; Mine Güngörmüşler
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1-2 pp. 71-84
ISSN:
1865-7125
Subject:
COVID-19 infection; candy; carrots; confectionery industry; fermentation; functional foods; immune system; intestines; lemon juice; probiotics; sugars; yogurt
Abstract:
... Probiotics are living organisms that have beneficial effects on host by regulating the microbial balance of the intestinal system. While probiotics are naturally found in yogurt and other fermented foods, they can also be added to many products. Although mostly in dairy products, it is possible to see examples of food products supplemented by probiotics in bakeries, chocolates and confectioneries. ...
DOI:
10.1515/znc-2021-0081

4. A convenient approach for the electrochemical bromination and iodination of pyrazoles

Author:
Sara Zandi; Farzad Nikpour
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1 pp. 35-40
ISSN:
1865-7117
Subject:
Lewis acids; bromination; electrochemistry; electrolysis; iodination; oxidation; pyrazoles
Abstract:
... Electrochemical bromination and iodination of some pyrazoles were investigated under constant-current (CC) electrolysis in an undivided electrochemical cell. Anodic oxidation of KX salt produces X₂ in-situ which can be consumed as an expedient electrophile in pyrazoles aromatic electrophilic substitution reactions or may participate in an X–N coupling reaction with electrochemically catalyzed pyra ...
DOI:
10.1515/znb-2021-0148

5. A new diphenylheptanoid from the rhizomes of Curcuma zedoaria

Author:
Truong Nhat Van Do; Hai Xuan Nguyen; Tho Huu Le; Phu Hoang Dang; Mai Thanh Nguyen; Mai Thanh Thi Nguyen; Nhan Trung Nguyen
Source:
Zeitschrift für Naturforschung 2022 v.77 no.5-6 pp. 219-223
ISSN:
1865-7125
Subject:
Curcuma zedoaria; acarbose; phytochemicals; spectral analysis
Abstract:
... A phytochemical investigation of the rhizomes of Curcuma zedoaria was carried out, leading to the isolation of a new diphenylheptanoid, zedoaroxane A (1), together with four known compounds (2–5). Their structures were elucidated based on NMR spectroscopic data. All isolated compounds possessed α-glucosidase inhibitory activity, with the IC₅₀ values ranging from 35.2 to 89.0 µM, more potent than t ...
DOI:
10.1515/znc-2021-0096

6. A new luminescent metal-organic framework with 2,6-di(1H-imidazol-1-yl)naphthalene and biphenyl-3,4′,5-tricarboxylic acid

Author:
Zhi-Qiang Liu; Ran-Ran Liu; Heng-Hui Jin; Long-Wen Lei; Zhi-Ping Wang; Lei Shi
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1 pp. 69-74
ISSN:
1865-7117
Subject:
X-ray diffraction; ambient temperature; coordination polymers; naphthalene; photoluminescence; spectroscopy; thermal analysis
Abstract:
... In this work, a novel metal-organic framework (MOF) based on 2,6-di(1H-imidazol-1-yl)naphthalene (L) and biphenyl-3,4′,5-tricarboxylic acid (H₃bptc), namely [Co(L)(Hbptc)(H₂O)] (1), has been prepared. 1 has a distinct infinite chain structure, further linked together by winding interactions to give the three-dimensional (3D) network structure. 1 was characterized by X-ray crystallography, infrared ...
DOI:
10.1515/znb-2021-0155

7. A new phenanthrene derivative from Entada abyssinica with antimicrobial and antioxidant properties

Author:
Larissa M. Magnibou; Peron B. Leutcha; Billy T. Tchegnitegni; Steven C. N. Wouamba; Cyrille Y. F. F. Magne; Abel J. G. Yaya; Theodora Kopa; Maurice F. Tagatsing; Nantenaina Tombozara; Alain L. Meli; Celine Henoumont; Sophie Laurent; Emmanuel Talla
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1 pp. 1-7
ISSN:
1865-7117
Subject:
Candida albicans; Candida parapsilosis; Entada; Salmonella enterica; Staphylococcus epidermidis; antifungal properties; antioxidant activity; antioxidants; bark; campesterol; mass spectrometry; medicinal plants; methanol; nuclear magnetic resonance spectroscopy; phenanthrenes; skin diseases; therapeutics
Abstract:
... Entada abyssinica Steud. Ex A. Rich (Leguminosae) is a medicinal plant used traditionally for the treatment of infections. A phytochemical investigation of the methanol extract of E. abyssinica root bark led to the isolation of a new phenanthrene derivative named phenentada (1), together with seven known compounds (8 S, 13 E)-kolavic acid 15-methyl ester (2) and 8 S-kolavic acid 15-methyl ester (3 ...
DOI:
10.1515/znb-2021-0076

8. A synergy interaction of artocarpin and tetracycline against Pseudomonas aeruginosa and its mechanism of action on membrane permeability

Author:
Abdi Wira Septama; Eldiza Puji Rahmi; Lucia Dwi Antika; Rizna Triana Dewi; Amit Jaisi
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1-2 pp. 57-63
ISSN:
1865-7125
Subject:
Artocarpus heterophyllus; Pseudomonas aeruginosa; antibacterial properties; antibiotic resistance; bacterial growth; cell death; cross infection; flavonoids; mechanism of action; membrane permeability; minimum inhibitory concentration; synergism; tetracycline
Abstract:
... The emergence of antibacterial resistance has significantly increased. Pseudomonas aeruginosa is associated with nosocomial infection and difficult to control. Artocarpin, a flavonoid from Artocarpus heterophyllus Lam. exhibits several pharmacological properties including antibacterial. The study was performed to evaluate interaction between artocarpin and antibiotics including tetracycline agains ...
DOI:
10.1515/znc-2021-0076

9. An update on the progress of microbial biotransformation of commercial monoterpenes

Author:
Ruchika Mittal; Gauri Srivastava; Deepak Ganjewala
Source:
Zeitschrift für Naturforschung 2022 v.77 no.5-6 pp. 225-240
ISSN:
1865-7125
Subject:
biosynthesis; biotransformation; cosmetics; drugs; enzymology; flavor; humans; monoterpenoids; odors; perfumes
Abstract:
... Monoterpenes, a class of isoprenoid compounds, are extensively used in flavor, fragrance, perfumery, and cosmetics. They display many astonishing bioactive properties of biological and pharmacological significance. All monoterpenes are derived from universal precursor geranyl diphosphate. The demand for new monoterpenoids has been increasing in flavor, fragrances, perfumery, and pharmaceuticals. C ...
DOI:
10.1515/znc-2021-0192

10. Antileishmanial, antibacterial and cytotoxicity activity of the extracts, fractions, and compounds from the fruits and stem bark extracts of Pentadesma butyracea Sabine

Author:
Jean Koffi Garba; Ruland Tchuinkeu Nguengang; Gwladys Tatiana Youmbi; Joel Njopnu Menatche; Cyrille Armel Njanpa Ngansop; Jean Jules Kezetas Bankeu; Jean Rodolphe Chouna; Fabrice Fekam Boyom; Norbert Sewald; Bruno Ndjakou Lenta
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1 pp. 9-15
ISSN:
1865-7117
Subject:
Enterobacter cloacae; Escherichia coli; Leishmania donovani; Pentadesma butyracea; Pseudomonas aeruginosa; Salmonella Typhi; Staphylococcus aureus; Streptococcus pneumoniae; antibacterial properties; bark; bark extracts; chromatography; cytotoxicity; fractionation; macrophages; promastigotes; traditional medicine
Abstract:
... The search for antileishmanial plants used in traditional medicine led to the choice of CH₂Cl₂–MeOH (1:1) crude extract of the fruits and stem bark of Pentadesma butyracea Sabine (Clusiaceae) which displayed good activity in vitro against Leishmania donovani 1S (MHOM/SD/62/1S) promastigotes during preliminary screening with IC₅₀ values 5.96 and 26.43 μg mL⁻¹, respectively. The fractionation of bot ...
DOI:
10.1515/znb-2021-0077

11. Antimicrobial synergism and antibiofilm activities of Pelargonium graveolens, Rosemary officinalis, and Mentha piperita essential oils against extreme drug-resistant Acinetobacter baumannii clinical isolates

Author:
Ayse Humeyra Taskin Kafa; Rukiye Aslan; Cem Celik; Mursit Hasbek
Source:
Zeitschrift für Naturforschung 2022 v.77 no.3-4 pp. 95-104
ISSN:
1865-7125
Subject:
Acinetobacter baumannii; Mentha piperita; Pelargonium graveolens; alternative medicine; antibacterial properties; biofilm; chemical composition; colistin; essential oils; gas chromatography-mass spectrometry; minimum inhibitory concentration; rosemary; synergism
Abstract:
... Rosemary officinalis L., Pelargonium graveolens L., and Mentha piperita L., essential oils are used by complementary medicine specialists simultaneously with traditional antibiotics for treatment purposes. The chemical composition of essential oils was analyzed by the gas chromatography-mass spectrometry method. In vitro antibacterial and antibiofilm activities of the essential oils were tested ag ...
DOI:
10.1515/znc-2021-0079

12. Bioactive compounds from Matricaria chamomilla: structure identification, in vitro antiproliferative, antimigratory, antiangiogenic, and antiadenoviral activities

Author:
Mohamed Shaaban; Ali M. El-Hagrassi; Abeer F. Osman; Maha M. Soltan
Source:
Zeitschrift für Naturforschung 2022 v.77 no.3-4 pp. 85-94
ISSN:
1865-7125
Subject:
Matricaria chamomilla; antineoplastic activity; chamomile; colorectal neoplasms; flower extracts; growth retardation; metabolites; pathogenicity; spectral analysis; stem extracts; viruses
Abstract:
... During our exploring the anticancer activity of some medicinal plants and their major metabolites, the aerial parts of the Egyptian Matricaria chamomilla (flowers and stems) were studied. GC–MS analysis of the organic soluble extracts of the flowers and stems fractions revealed the presence of 43 and 45 compounds, respectively. Individual chromatographic purification of the flowers and stems’ extr ...
DOI:
10.1515/znc-2021-0083

13. Bioguided isolation of antiplasmodial secondary metabolites from Persea americana Mill. (Lauraceae)

Author:
Christine Claire Waleguele; Marthe Aimée Tchuente Tchuenmogne; Yannick Stéphane Fotsing Fongang; Jules Ngatchou; Jean Jules Kezetas Bankeu; Augustin Silvère Ngouela; Etienne Tsamo; Norbert Sewald; Rui Werner Maçedo Krause; Bruno Ndjakou Lenta
Source:
Zeitschrift für Naturforschung 2022 v.77 no.3-4 pp. 125-131
ISSN:
1865-7125
Subject:
Persea americana; Plasmodium falciparum; antiplasmodial properties; bark; chloroquine; cytotoxicity; fatty alcohols; lactate dehydrogenase; lutein; malaria; scopoletin; secondary metabolites; traditional medicine
Abstract:
... The antiplasmodium assay-guided investigation of the roots, stem bark, and leaves of Persea americana Mill. led to the isolation of a new fatty alcohol, perseatriol (1), along with six known compounds (2–7). Their structures were elucidated based on the analysis of their NMR and MS data. All crude extracts and fractions exhibited good antiplasmodial activity on Plasmoduim falciparum 3D7 with IC₅₀ ...
DOI:
10.1515/znc-2021-0182

14. Biological activities of some Salvia species

Author:
Mehmet Doğan; Nurdan Akıcı; Mehmet Emin Diken; Serap Doğan; Begumhan Yilmaz Kardas; Tuncay Dirmenci
Source:
Zeitschrift für Naturforschung 2022 v.77 no.3-4 pp. 133-143
ISSN:
1865-7125
Subject:
Escherichia coli; Salvia; Staphylococcus aureus; antibacterial properties; cytotoxicity; humans; protein content; rutin; vanillic acid
Abstract:
... In this study, total phenolic, flavonoid and protein contents, antiradical capacities, antibacterial and cytotoxic properties of five different Salvia species (Salvia macrochlamys Boiss., Salvia kronenburgii Rech.f., Salvia euphratica Montbret. ex Aucher var. euphratica, Salvia huberi Hedge and Salvia kurdica Benth) were investigated. The total phenolic content of the species was in the range of 5 ...
DOI:
10.1515/znc-2021-0136

15. Bismuth-rich bimetallic clusters (CuBi₈)³⁺ and [MBi₁₀]⁴⁺ (M = Pd, Pt) from ionothermal synthesis

Author:
Maximilian Knies; Michael Ruck
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 191-196
ISSN:
1865-7117
Subject:
X-ray diffraction; bismuth; cations; copper; ionic liquids
Abstract:
... The reaction of Bi, BiBr₃, and CuBr in the Lewis-acidic ionic liquid [BMIm]Br·4AlBr₃ (BMIm = 1-n-butyl-3-limidazolium) at 180 °C yielded air-sensitive, shiny black crystals of (CuBi₈)[AlBr₄]₂[Al₂Br₇]. Crystals of [MBi₁₀][AlCl₄]₄ (M = Pd, Pt) were obtained by reacting Bi, BiCl₃, and MCl₂ under similar conditions. The structures have been determined by X-ray diffraction on single-crystals and were f ...
DOI:
10.1515/znb-2021-0159

16. Chalcogenative spirocyclization of N-aryl propiolamides with diselenides/disulfides promoted by Selectfluor

Author:
Jin-Wei Yuan; Guang-Chao Huang; Li-Li Wang; Xin-Yuan Wang; Liang-Ru Yang; Shou-Ren Zhang; Pu Mao; Yong-Mei Xiao; Ling-Bo Qu
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1 pp. 75-85
ISSN:
1865-7117
Subject:
Lewis acids; cations; chemical reactions; disulfides; oxidants
Abstract:
... A practical and efficient synthetic route to construct a variety of 3-arylselenenyl/3-arylthio spiro[4.5]trienones was developed using Selectfluor reagent as a mild oxidant. This reaction proceeds via a sequence of electrophilic cation addition, spirocyclization and dearomatization, then offers an approach to introduce Se/S-centered cation into the C–C triple bonds. The utility of this protocol we ...
DOI:
10.1515/znb-2021-0154

17. Chemical composition, antioxidant, and antimicrobial activities of two essential oils from Algerian propolis

Author:
Safia Boulechfar; Amar Zellagui; Meltem Asan-Ozusaglam; Chawki Bensouici; Ramazan Erenler; İlyas Yildiz; Songul Tacer; Hasna Boural; Ibrahim Demirtas
Source:
Zeitschrift für Naturforschung 2022 v.77 no.3-4 pp. 105-112
ISSN:
1865-7125
Subject:
Candida albicans; Escherichia coli O157; Pseudomonas aeruginosa; agar; antibacterial properties; antifungal properties; antioxidant activity; antioxidants; cedrol; chemical composition; gas chromatography-mass spectrometry; mechanism of action; propolis
Abstract:
... This study aims to investigate the chemical composition, antioxidant, and antimicrobial activity of two essential oils (EOs) from Algerian propolis. The volatile constituents were analyzed by gas chromatography-mass spectrometry. Fifty components were identified from the oils. The major components were found to be: cedrol (17.0%), β-eudesmol (7.7%), and α-eudesmol (6.7%) in EO of propolis from Oum ...
DOI:
10.1515/znc-2021-0028

18. Chemically and Light-Driven Coordination-Induced Spin State Switching (CISSS) of a nonheme-iron complex

Author:
Kim Fischer; Jan Krahmer; Felix Tuczek
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 299-311
ISSN:
1865-7117
Subject:
benzylamines; ligands; magnetism; methylene chloride; nuclear magnetic resonance spectroscopy; photoirradiation; pyridines
Abstract:
... The new Fe(II) complex [Fe(trident)(bmik)](ClO₄)₂ (1) (trident = bis(2-pyridylmethyl)benzylamine and bmik = bis(1-methylimidazole)ketone) exhibits a change of magnetic moment in dichloromethane (DCM) solution upon addition of pyridine which is attributed to the Coordination-Induced Spin State Switching effect (CISSS). By attaching a photoisomerizable azopyridine sidegroup to the tridentate ligand ...
DOI:
10.1515/znb-2022-0011

19. Crystal structure of Dy₁₁Ge₄.₃₃In₅.₆₇ and Tm₁₁Ge₄In₆ from X-ray single-crystal and powder data

Author:
Nataliya Dominyuk; Galyna Nychyporuk; Ihor Muts; Yuriy Tyvanchuk; Vasyl’ Zaremba; Rainer Pöttgen
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 253-261
ISSN:
1865-7117
Subject:
X-radiation; X-ray diffraction; crystal structure; germanium
Abstract:
... Single crystals of Dy₁₁Ge₄.₃₃In₅.₆₇ were grown from a sample of the starting composition Dy₅₅Ge₂₀In₂₅ by arc-melting and subsequent annealing. Dy₁₁Ge₄.₃₃In₅.₆₇ crystallizes with the Sm₁₁Ge₄In₆-type structure, space group I4/mmm, which was refined from single-crystal X-ray diffractometer data: a = 11.4329(16), c = 16.168(3) Å, wR2 = 0.0341, 927 F² values and 42 refined parameters. The isotypic comp ...
DOI:
10.1515/znb-2021-0187

20. Crystal structure of phenanthrenide salts stabilized by 15-crown-5 and 18-crown-6

Author:
Natalie Eichstaedt; Kasper P. van der Zwan; Lina Mayr; Renée Siegel; Jürgen Senker; Josef Breu
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 197-201
ISSN:
1865-7117
Subject:
X-ray diffraction; cations; crystal structure; ligands; nuclear magnetic resonance spectroscopy; potassium; solvents
Abstract:
... Potassium 15-crown-5 phenanthrenide and potassium 18-crown-6 phenanthrenide were synthesized and characterized by powder X-ray diffraction and ³⁹K solid state NMR spectroscopy. While the radical carbanion is very reactive in solution, the crystals are stable and storable under inert atmosphere. For 15-crown-5, a sandwich-like complex of potassium is formed with two molecules of crown ether per pot ...
DOI:
10.1515/znb-2021-0177

21. Crystallisation of phosphates revisited: a multi-step formation process for SrHPO₄

Author:
Laura Ruiz Arana; Jonas Ströh; Jasper Amtsfeld; Giscard Doungmo; Dmitri Novikov; Azat Khadiev; Martin Etter; Michael Wharmby; Markus Suta; Huayna Terraschke
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 263-272
ISSN:
1865-7117
Subject:
X-ray diffraction; crystallization; light transmission; luminescence; medicine; phosphates; reaction mechanisms; reflectance; strontium; thermogravimetry
Abstract:
... SrHPO₄ is used in a multitude of applications, including biomedicine, catalysts, luminescent materials, and batteries. However, the performance of these materials depends on the ability to control the formation and transformation of strontium phosphates. This work focuses on the application of in situ and ex situ measurements, including synchrotron-based X-ray diffraction (XRD) analysis, luminesce ...
DOI:
10.1515/znb-2021-0182

22. Cytokine storm syndrome in SARS-CoV-2: a review

Author:
Braira Wahid; Noshaba Rani; Muhammad Idrees
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1-2 pp. 65-69
ISSN:
1865-7125
Subject:
COVID-19 infection; Severe acute respiratory syndrome coronavirus 2; acute respiratory distress syndrome; cytokines; immunosuppression; inflammation; mortality; pandemic; risk
Abstract:
... After wreaking havoc on a global level with a total of 5,488,825 confirmed cases and 349,095 deaths as of May 2020, severe acute respiratory syndrome coronavirus 2 is truly living up to the expectations of a 21st-century pandemic. Since the major cause of mortality is a respiratory failure from acute respiratory distress syndrome, the only present-day management option is supportive as the transmi ...
DOI:
10.1515/znc-2021-0062

23. Dimorphism of MnHAsO₄(H₂O): natural monoclinic krautite and its synthetic triclinic modification

Author:
Matthias Weil; Uwe Kolitsch; Tobias Stürzer
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 221-230
ISSN:
1865-7117
Subject:
X-ray diffraction; ambient temperature; crystal structure; dimorphism; gels; hydrogen; hydrogen bonding
Abstract:
... The crystal structure of natural krautite, MnHAsO₄(H₂O), was re-evaluated from a cotype specimen, confirming the previously reported monoclinic symmetry for this mineral (space group P2₁, Z = 8, a = 8.0093(5), b = 15.9372(10), c = 6.8065(4) Å, β = 96.534(2)° at room temperature, 5662 structure factors, 302 parameters, R1 = 0.0295, wR2 = 0.0770). Although hydrogen atoms could not be located from th ...
DOI:
10.1515/znb-2021-0184

24. Effect of Origanum dubium, Origanum vulgare subsp. hirtum, and Lavandula angustifolia essential oils on lipid profiles and liver biomarkers in athletes

Author:
Hasan Maral; Süleyman Ulupınar; Ayşegül Türk Baydır; Serhat Özbay; Konca Altınkaynak; Engin Şebin; Erdinç Şiktar; Necip Fazıl Kishalı; Yusuf Buzdağlı; Cebrail Gençoğlu; İzzet İnce
Source:
Zeitschrift für Naturforschung 2022 v.77 no.5-6 pp. 177-187
ISSN:
1865-7125
Subject:
Lavandula angustifolia; Origanum vulgare subsp. hirtum; acetates; analysis of covariance; biomarkers; blood serum; carvacrol; essential oils; gas chromatography-mass spectrometry; high density lipoprotein cholesterol; linalool; liver; low density lipoprotein cholesterol
Abstract:
... This study aims to determine the effects of essential oils of Origanum dubium (DUB), Origanum vulgare subsp. hirtum (HIR), and Lavandula angustifolia (LAV) on lipid profiles and liver biomarkers in athletes. Thirty-four trained athletes were randomly assigned to one of three experimental groups or the control group (CON). The concentrations of serum lipids and liver biomarkers were assessed before ...
DOI:
10.1515/znc-2021-0142

25. Essential oils of Uvaria boniana – chemical composition, in vitro bioactivity, docking, and in silico ADMET profiling of selective major compounds

Author:
Son Ninh The; Anh Le Tuan; Thuy Dinh Thi Thu; Luyen Nguyen Dinh; Tuyen Tran Thi; Hai Pham-The
Source:
Zeitschrift für Naturforschung 2022 v.77 no.5-6 pp. 207-218
ISSN:
1865-7125
Subject:
Aspergillus niger; Bacillus subtilis; DNA topoisomerase (ATP-hydrolysing); Escherichia coli; Pseudomonas aeruginosa; Saccharomyces cerevisiae; Uvaria; absorption; anti-inflammatory activity; antimicrobial properties; branches; chemical composition; computer simulation; flame ionization; leaves; linalool; mass spectrometry; medicinal plants; metabolism; oils; penicillins; sesquiterpenoids; yeasts
Abstract:
... Phytochemical investigation applying GC (gas chromatography)-MS (mass spectrometry)/GC-FID (flame ionization detection) on the hydro-distilled essential oils of the Vietnamese medicinal plant Uvaria boniana leaf and twig lead to the detection of 35 constituents (97.36%) in the leaf oil and 52 constituents (98.75%) in the twig oil. Monoterpenes, monoterpenoids, sesquiterpenes, and sesquiterpenoids ...
DOI:
10.1515/znc-2021-0111

26. Establishment and metabonomics analysis of nonalcoholic fatty liver disease model in golden hamster

Author:
Cui-Zhu Zhao; Lin Jiang; Wen-Yan Li; Guang Wu; Jie Chen; Li-Hua Dong; Min Li; Wei Jiang; Ji-Xiao Zhu; Yan-Ping Gao; Qin-Ge Ma; Guo-Yue Zhong; Rong-Rui Wei
Source:
Zeitschrift für Naturforschung 2022 v.77 no.5-6 pp. 197-206
ISSN:
1865-7125
Subject:
Mesocricetus auratus; abdominal fat; arginine; biosynthesis; blood serum; body weight; disease models; fatty liver; glycerophospholipids; high fat diet; histology; liver; metabolites; metabolomics; pathogenesis; sphingolipids; therapeutics; triacylglycerols
Abstract:
... The aim is to establish a model of nonalcoholic fatty liver disease (NAFLD) caused by feeding with high-fat, high-fructose, and high-cholesterol diet (HFFCD) in golden hamsters, and to investigate the characteristics of the NAFLD model and metabolite changes of liver tissue. Golden hamsters were fed HFFCD or control diets for six weeks. Body weight, abdominal fat index, and liver index was assesse ...
DOI:
10.1515/znc-2021-0201

27. Extracting information from X-ray diffraction patterns containing Laue oscillations

Author:
Aaron M. Miller; Mellie Lemon; Marisa A. Choffel; Sarah R. Rich; Fischer Harvel; David C. Johnson
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 313-322
ISSN:
1865-7117
Subject:
X-ray diffraction; bismuth; iron; molybdenum; roughness; titanium; vanadium
Abstract:
... The presence of Laue oscillations in a film grown on a solid surface is broadly taken as indicating a high quality, crystallographically aligned film of the targeted compound. In this paper we briefly review the origins of both Laue oscillations and Kiessig fringes and show how they can be used together to determine if extra thickness exists above or below the coherently diffracting domains. The d ...
DOI:
10.1515/znb-2022-0020

28. Furanone-functionalized benzothiazole derivatives: synthesis, in vitro cytotoxicity, ADME, and molecular docking studies

Author:
Asif Husain; Silky Bedi; Shazia Parveen; Shah Alam Khan; Aftab Ahmad; Md Azhar Iqbal; Aasif Farooq; Anwar Ahmed
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1 pp. 41-53
ISSN:
1865-7117
Subject:
acute toxicity; computer simulation; cytotoxicity; doxorubicin; heart; hepatotoxicity; humans; liver; neoplasm cells; vascular endothelial growth factor receptor-2
Abstract:
... In the present study, a novel series of new furanone-based benzothiazole derivatives (4a-j) were synthesized from 4-(benzo[d]thiazol-2-yl)-4-oxobutanoic acid (3) as potential anticancer agents. In vitro cytotoxicity against three human cancer cell lines (A549, MCF7, and DUI45) revealed substantial activity. Di-substituted compound, 4i emerged as a promising anticancer compound which showed IC₅₀ va ...
DOI:
10.1515/znb-2021-0146

29. Gadolinium trisilicide − a paramagnetic representative of the YbSi₃ type series

Author:
Teuta Neziraj; Katrin Meier-Kirchner; Walter Schnelle; Steffen Wirth; Yuri Grin; Ulrich Schwarz
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 323-329
ISSN:
1865-7117
Subject:
X-ray diffraction; ambient pressure; chemical analysis; crystal structure; ferrimagnetic materials; gadolinium; heat production; magnetism; quantum mechanics; silicon
Abstract:
... Binary gadolinium trisilicide GdSi₃ was prepared by high-pressure high-temperature synthesis at typically 9.5(5) GPa and 870 K before quenching to ambient conditions. At ambient pressure, GdSi₃ exhibits an exothermic decomposition at 647(10) K into the thermodynamically stable phases GdSi₂–ₓ and Si, indicating its metastable character. Powder X-ray diffraction data is consistent with the YbSi₃-typ ...
DOI:
10.1515/znb-2022-0024

30. Isolation and characterization of chemical constituents from Chaerophyllum bulbosum roots and their enzyme inhibitory and antioxidant effects

Author:
Gülsen Tel-Çayan; Ebru Deveci; Zeynep Molo; Mehmet Emin Duru; Mehmet Öztürk
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1-2 pp. 1-9
ISSN:
1865-7125
Subject:
Chaerophyllum; acetylcholinesterase; alpha-amylase; antioxidants; cholinesterase; hexane; stigmasterol; therapeutics; urease
Abstract:
... Isolation and bioactive effects of the roots of Chaerophyllum bulbosum L. were firstly investigated herein. Enzyme (acetylcholinesterase, butyrylcholinesterase, urease, α-amylase, α-glucosidase, and tyrosinase) inhibitory effects of C. bulbosum root extracts were tested. Three known compounds, n-heptadecanyl eicosanoate (1), stigmasterol (2), and β-sitosterol-3-O-β-d-glucopyranoside (3) were isola ...
DOI:
10.1515/znc-2021-0119

31. Molecular and crystal structure of a copper(II) complex of sildenafil

Author:
Akhmatkhodja N. Yunuskhodjayev; Shokhista F. Iskandarova; Vahobjon Kh. Sabirov
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1 pp. 31-34
ISSN:
1865-7117
Subject:
X-ray diffraction; cations; chlorides; copper; crystal structure; ligands; methylation; piperazine
Abstract:
... The crystal structure of a copper(II) complex of protonated sildenafil, CuCl₃C₂₂H₃₁N₆O₄S⋅2H₂O was studied by single crystal X-ray diffraction. The compound crystallizes in the monoclinic space group P2₁/n with the unit cell parameters a = 15.4292(2), b = 9.06735(12), c = 21.1752(2) Å, V = 2945.48(7) Å³, Z = 4. The Cu atom is coordinated by the sildenafil ligand via the N2 atom of the pyrazolopyrim ...
DOI:
10.1515/znb-2021-0145

32. Monascin and monascinol, azaphilonoid pigments from Mortierella polycephala AM1: in silico and in vitro targeting of the angiogenic VEGFR2 kinase

Author:
Mohamed Shaaban; Mohammad Magdy El-Metwally; Amal A. I. Mekawey; Ahmed B. Abdelwahab; Maha M. Soltan
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1-2 pp. 11-19
ISSN:
1865-7125
Subject:
Mortierella; antineoplastic activity; computer simulation; cytotoxicity; fungi; metabolites; poultry; spectral analysis; vascular endothelial growth factor receptor-2; wastes
Abstract:
... The fungus, Mortierella polycephala is one of the most productive sources of anticancer bioactive compounds namely those of pigment nature. During our investigation of the produced bioactive metabolites by the terrestrial M. polycephala AM1 isolated from Egyptian poultry feather waste, two main azaphilonoid pigments, monascin (1) and monascinol (2) were obtained as major products; their structures ...
DOI:
10.1515/znc-2021-0095

33. NLRP3 inflammasome activation and oxidative stress status in the mild and moderate SARS-CoV-2 infected patients: impact of melatonin as a medicinal supplement

Author:
Hadi Esmaeili Gouvarchin Ghaleh; Abdolkarim Hosseini; Hossein Aghamollaei; Mahdi Fasihi-Ramandi; Gholamhossein Alishiri; Ali Saeedi-Boroujeni; Kazem Hassanpour; Mohammad-Reza Mahmoudian-Sani; Gholamreza Farnoosh
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1-2 pp. 37-42
ISSN:
1865-7125
Subject:
COVID-19 infection; Severe acute respiratory syndrome coronavirus 2; blood; caspase-1; inflammasomes; interleukin-10; lungs; malondialdehyde; melatonin; nitric oxide; oxidative stress; superoxide dismutase; therapeutics
Abstract:
... The inflammasome as a multiprotein complex has a role in activating ASC and caspase-1 resulting in activating IL-1β in various infections and diseases like corona virus infection in various tissues. It was shown that these tissues are affected by COVID-19 patients. According to the current evidence, melatonin is not veridical while possessing a high safety profile, however, it possesses indirect a ...
DOI:
10.1515/znc-2021-0101

34. Novel Ag(I)-NHC complex: synthesis, in vitro cytotoxic activity, molecular docking, and quantum chemical studies

Author:
Goncagül Serdaroğlu; Neslihan Şahin; Serap Şahin-Bölükbaşı; Elvan Üstün
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1-2 pp. 21-36
ISSN:
1865-7125
Subject:
Fourier transform infrared spectroscopy; antineoplastic activity; breasts; carbenes; cytotoxicity; density functional theory; heterocyclic nitrogen compounds; humans; nuclear magnetic resonance spectroscopy; prostatic neoplasms; quantum mechanics; spectral analysis
Abstract:
... The importance of organometallic complexes in cancer biology has attracted attention in recent years. In this paper, we look for the in vitro cytotoxic capability of novel benzimidazole-based N-heterocyclic carbene (NHC) precursor (1) and its Ag(I)-NHC complex (2). For this purpose, these novel Ag(I)-NHC complex (2) was characterized by spectroscopic techniques (¹H, ¹³C{¹H} nuclear magnetic resona ...
DOI:
10.1515/znc-2021-0130

35. Novel thiazolyl-hydrazone derivatives including piperazine ring: synthesis, in vitro evaluation, and molecular docking as selective MAO-A inhibitor

Author:
Derya Osmaniye; Ramazan Alaşan; Begüm Nurpelin Sağlık; Serkan Levent; Yusuf Özkay; Zafer Asım Kaplancıklı
Source:
Zeitschrift für Naturforschung 2022 v.77 no.3-4 pp. 167-175
ISSN:
1865-7125
Subject:
enzymes; fluorometry; morpholine; pharmacology; piperazine
Abstract:
... MAO-A inhibitors are used in the treatment of depression. There are many studies showing that the thiazolyl-hydrazone structure is a pharmacophore structure for the MAO enzyme. In previous studies by our team, activity studies were carried out with thiazolyl-hydrazone derivatives containing pyrrolidine, morpholine, and piperazine. All of them were displayed MAO-A selective inhibition profile. Addi ...
DOI:
10.1515/znc-2021-0223

36. Oxidative stress and cyto-genotoxicity induced by poly-d-glucosamine in human blood cells in vitro

Author:
Salim Cerig; Fatime Geyikoglu
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1-2 pp. 43-55
ISSN:
1865-7125
Subject:
antioxidant activity; cell walls; cellulose; chitin; chitosan; chromosome aberrations; crabs; cytotoxicity; fungi; genotoxicity; human health; humans; insects; lactate dehydrogenase; mutagens; oxidants; oxidative stress; risk; shrimp; skeleton
Abstract:
... Poly-N-acetyl-d-glucosamine (CH; chitin) is the main component of the insect skeleton, fungal cell wall, and many crustaceans, including crab and shrimp. CH is the most abundant in nature after cellulose, and it has a complex and hardly soluble structure. Poly-d-glucosamine (CHO; chitosan) is a soluble derivative of CH produced by deacetylation used in many fields, including human health. This stu ...
DOI:
10.1515/znc-2021-0080

37. Oxygen evolving reactions catalyzed by different manganese oxides: the role of oxidation state and specific surface area

Author:
Stefanie Becker; Malte Behrens
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 273-285
ISSN:
1865-7117
Subject:
birnessite; catalysts; catalytic activity; ceric ammonium nitrate; electrical conductivity; electrochemistry; manganese; manganese monoxide; oxidation; oxygen; oxygen production; surface area
Abstract:
... A set of the four manganese oxide powders α-MnO₂ (hollandite), δ-MnO₂ (birnessite), Mn₂O₃ (bixbyite), and Mn₃O₄ (hausmannite) have been synthesized in a phase-pure form and tested as catalysts in three different oxygen evolution reactions (OER): electrochemical OER in KOH (1 mol L⁻¹), chemical OER using aqueous cerium ammonium nitrate, and H₂O₂ decomposition. The trends in electrochemical (holland ...
DOI:
10.1515/znb-2022-0009

38. Pressure-induced phase transitions and mechanical properties of insensitive high explosive 1,1-diamino-2,2-dinitroethylene

Author:
Wenpeng Wang; Qijun Liu; Fusheng Liu; Zhengtang Liu
Source:
Zeitschrift für Naturforschung 2022 v.77 no.2-3 pp. 131-140
ISSN:
1865-7117
Subject:
X-ray diffraction; anisotropy; brittleness; density functional theory; modulus of elasticity; phase transition
Abstract:
... The structural and mechanical properties of an insensitive high-explosive 1,1-diamino-2,2-dinitroethylene (FOX-7) polymorphs were studied using dispersion-corrected density functional theory calculations. The predicted lattice parameters of FOX-7 polymorphs agree well with the available single-crystal X-ray diffraction data. From our elastic modulus calculations, we found that the ε phase has the ...
DOI:
10.1515/znb-2021-0174

39. Role of Hypericum perforatum oil and pomegranate seed oil in wound healing: an in vitro study

Author:
Ebru Uzunhisarcıklı; Mükerrem Betül Yerer
Source:
Zeitschrift für Naturforschung 2022 v.77 no.5-6 pp. 189-195
ISSN:
1865-7125
Subject:
Hypericum perforatum; curcumin; cytotoxicity; ibuprofen; models; pomegranates; seed extracts; seed oils
Abstract:
... This study aimed to investigate the wound-healing efficacy of Hypericum perforatum and pomegranate seed extract oil combined with curcumin as an anti inflammatory agent. A series of experiments were carried out to determine effective concentrations for H. perforatum oil, pomegranate seed extract oil, and curcumin. Ibuprofen was used as a positive control. The wound-healing effects of the applied c ...
DOI:
10.1515/znc-2020-0301

40. Secondary metabolites from Detarium microcarpum Guill. and Perr. (Fabaceae)

Author:
William Fouatio Feudjou; Arnaud Michel Mbock; Valerie Tedjon Sielinou; Hugue Fouotsa; Steven Collins Njonté Wouamba; Racéline Kamkumo Gounoue; Marcel Freeze; Hans-Georg Stammler; Jean Jules Kezeutas Bankeu; Mkounga Pierre; Bruno Ndjakou Lenta; Alembert Tiabou Tchinda; Norbert Sewald; Augustin Ephrem Nkengfack
Source:
Zeitschrift für Naturforschung 2022 v.77 no.5-6 pp. 253-261
ISSN:
1865-7125
Subject:
Detarium microcarpum; Salmonella Enteritidis; Salmonella Typhi; ceramides; ethanol; glucosides; labdane; minimum inhibitory concentration; secondary metabolites; spectral analysis; stigmasterol; ursolic acid
Abstract:
... The chemical investigation of the ethanol/water (7:3) extract of the roots of Detarium microcarpum (Fabaceae) led to the isolation of one new labdane diterpenoid, microcarpin (1) and one new ceramide derivative, microcarpamide (2), along with eight known secondary metabolites (3–10) including, 5-(carboxymethyl)-5,6,8a-trimethyl-3,4,4a,5,6,7,8,8a-octahydronaphthalene-1-carboxylic acid (3), microcar ...
DOI:
10.1515/znc-2021-0239

41. Secondary metabolites of downy birch buds (Betula pubescens Erch.)

Author:
Valery A. Isidorov; Jolanta Nazaruk; Marcin Stocki; Sławomir Bakier
Source:
Zeitschrift für Naturforschung 2022 v.77 no.3-4 pp. 145-155
ISSN:
1865-7125
Subject:
Betula pubescens; bioactive properties; biosynthesis; carbon dioxide; flavonoids; secondary metabolites; sesquiterpenoids; triterpenoids
Abstract:
... The subject of this study is the composition of low-molecular-weight metabolites in downy birch (Betula pubescens) buds and their participation in protection from various kinds of stress. Using the GC-MS, 640 compounds were detected, of which 314 were identified in downy birch buds for the first time. The volatile components detected using the SPME technique mainly consisted (about 70% of the tota ...
DOI:
10.1515/znc-2021-0036

42. Si⋯O proximity in imidosilanes – absence of orbital interactions

Author:
Marcus Herbig; Uwe Böhme; Edwin Kroke
Source:
Zeitschrift für Naturforschung 2022 v.77 no.1 pp. 55-67
ISSN:
1865-7117
Subject:
Raman spectroscopy; X-ray diffraction; chemical analysis; geometry; imides; oxygen; quantum mechanics; silicon
Abstract:
... New N-silylated phthalimides, succinimides, and 1,8-napthalimides were synthesised by reactions of the alkali imides with chlorosilanes in THF. Six different mono-, di-, tri- and tetra-iminosilanes of the type (CH₃)₄–ₙSi(imide)ₙ were obtained and the products analysed with ¹H, ¹³C, ²⁹Si NMR, and Raman spectroscopy. The molecular structures of four imidosilanes have been determined by single-crysta ...
DOI:
10.1515/znb-2021-0118

43. Stability of proteins involved in initiation of DNA replication in UV damaged human cells

Author:
Boyka Borisova Anachkova; Vera Lyubchova Djeliova
Source:
Zeitschrift für Naturforschung 2022 v.77 no.3-4 pp. 113-123
ISSN:
1865-7125
Subject:
DNA damage; DNA replication; apoptosis; caffeine; caspases; cell cycle checkpoints; humans; phosphotransferases (kinases); proteasome endopeptidase complex; ultraviolet radiation
Abstract:
... The protein stability of the initiation factors Orc2, Orc3, Orc4, and Cdc6 was analyzed after UV light exposure in two human cell lines. In the cell line with higher repair capacity, HEK 293, no changes in the cell cycle distribution or in the protein levels of the investigated factors were detected. In HeLa cells that are characterized by lower repair capacity, UV irradiation caused a reduction o ...
DOI:
10.1515/znc-2020-0286

44. Structural and electrochemical properties of the binary silicides Eu₅Si₃ and EuSi

Author:
Bohdana Belan; Marek Daszkiewicz; Mariya Dzevenko; Beata Rożdżyńska-Kiełbik; Volodymyr Pavlyuk; Roman Gladyshevskii
Source:
Zeitschrift für Naturforschung 2022 v.77 no.2-3 pp. 99-109
ISSN:
1865-7117
Subject:
X-ray diffraction; ambient temperature; crystallization; electrochemistry
Abstract:
... The crystal structures of Eu₅Si₃ and EuSi were studied in detail by X-ray single-crystal diffraction. The single crystals were selected from arc-melted and annealed samples. X-ray diffraction was performed at room temperature on an Oxford Diffraction X’calibur Atlas four-circle diffractometer (MoKα radiation). Eu₅Si₃ adopts the tetragonal Cr₅B₃-type: space group I4/mcm (# 140), Pearson code tI32, ...
DOI:
10.1515/znb-2021-0163

45. Structural characterization of benzketozone monohydrate

Author:
Umida Tillaeva; Jamshid Ashurov; Gulnora Tillaeva; Abdusamat Nabiev; Vahobjon Sabirov
Source:
Zeitschrift für Naturforschung 2022 v.77 no.2-3 pp. 117-123
ISSN:
1865-7117
Subject:
X-ray diffraction; density functional theory; hydrogen; imines; infrared spectroscopy; nitrogen; quantum mechanics
Abstract:
... The structure of benzketozone monohydrate, C₉H₉N₃O₂S·H₂O (BKZ), was studied by single-crystal X-ray diffraction, quantum chemical (DFT) and IR spectroscopy methods. The nitrogen atoms of the amino and imine groups of the thiosemicarbazide fragment are stabilized in the cis-configuration. The bond length N–C in the thiosemicarbazide group is unusually short (1.306(3) Å) as a result of the p,π-conju ...
DOI:
10.1515/znb-2021-0170

46. Structure and properties of two new heteroleptic bismuth(III) dithiocabamates of the general composition Bi(S₂CNH₂)₂X (X = Cl, SCN)

Author:
Christoph Ludwig Teske; Huayna Terraschke; Sebastian Mangelsen; Wolfgang Bensch
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 203-210
ISSN:
1865-7117
Subject:
acetone; bismuth; cations; crystal structure; hydrogen; polymers
Abstract:
... The title compounds were prepared by precipitation from acidic solutions of the reactants in acetone/water. Bi(S₂CNH₂)₂Cl (1) crystallizes in the non-centrosymmetric trigonal space group P3₂ with a = 8.6121(3) and c = 11.1554(4) Å, Z = 3; Bi(S₂NH₂)₂SCN (2) in P2₁/c (monoclinic) with a = 5.5600(2), b = 14.3679(5), c = 12.8665(4) Å, and β = 90.37(3)°. In the crystal structure of 1 Bi³⁺ is in a seven ...
DOI:
10.1515/znb-2021-0176

47. Syntheses directed by ionic liquids: structures and properties of six novel lanthanide 1,3,5-benzenetrisbenzoate frameworks

Author:
Hua-Rui Wang
Source:
Zeitschrift für Naturforschung 2022 v.77 no.2-3 pp. 149-155
ISSN:
1865-7117
Subject:
X-ray diffraction; ferrimagnetic materials; lanthanides; ligands; magnetism; nitrates; thermogravimetry
Abstract:
... Reactions of lanthanide nitrate, 1,3,5-benzenetrisbnzoic acid (H₃BTB) and [RMI]Br ionic liquids (RMI = 1-alkyl-3-methylimidazolium; R = ethyl, propyl or butyl), gave rise to six novel lanthanide–organic frameworks (LOFs) [Ln(BTB)H₂O], where Ln = Nd 1, Sm 2, Gd 3, Dy 4, Ho 5 and Er 6. These compounds have been characterized by elemental analysis, IR spectra, thermogravimetric analysis, single-cryst ...
DOI:
10.1515/znb-2021-0179

48. Synthesis and structural characterization of a new heterometallicmolybdate coordination polymer based on a µ₃-bridging amino alcohol

Author:
Savita A. Kundaikar; Sudesh M. Morajkar; Wolfgang Bensch; Bikshandarkoil R. Srinivasan
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 287-297
ISSN:
1865-7117
Subject:
ambient temperature; amino alcohols; coordination polymers; hydrogen; ligands; oxygen
Abstract:
... The reaction of Na₂MoO₄·2H₂O with 2-amino-2-(hydroxymethyl)propane-1,3-diol (LH) in water at room temperature results in the formation of the heterometallic coordination polymer [Mo₂O₆L₂(Na₂(H₂O)₄)]·2H₂O 1 (L = 2-amino-3-hydroxy-2-(hydroxymethyl)propan-1-olato). The structure of 1 consists of a neutral (Mo₂O₆) unit located on an inversion center. The Mo atoms exhibit hexa-coordination and are bond ...
DOI:
10.1515/znb-2021-0183

49. Synthesis and structural characterization of three new mixed ligand alkaline-earth metal picrates

Author:
Neha U. Parsekar; Kedar U. Narvekar; Bikshandarkoil R. Srinivasan
Source:
Zeitschrift für Naturforschung 2022 v.77 no.4-5 pp. 211-219
ISSN:
1865-7117
Subject:
barium; carbonates; coordination polymers; hydrogen; ligands; nicotinamide; nitrogen; oxygen
Abstract:
... The dissolution of alkaline-earth metal carbonate in aqueous picric acid followed by reaction with nicotinamide results in the formation of [M(H₂O)ₙ(nic)₂(pic)₂] (nic = nicotinamide; pic = picrate; n = 1 and M = Ba 1; n = 2 and M = Ca (or Sr) 2 (or 3)). In [Ba(H₂O)(nic)₂(pic)₂] 1, the barium and the oxygen atoms of a terminal aqua ligand are located on a two-fold axis. Compound 1 exhibits a {BaO₇N ...
DOI:
10.1515/znb-2022-0003

50. Synthesis of a bifunctional boron-Lewis acid and studies on host-guest chemistry using pyridine and TMPD

Author:
Jens Rudlof; Beate Neumann; Hans-Georg Stammler; Norbert W. Mitzel
Source:
Zeitschrift für Naturforschung 2022 v.77 no.2-3 pp. 141-148
ISSN:
1865-7117
Subject:
Lewis acids; boron; chemistry; pyridines
Abstract:
... Based on the previously described bifunctional Lewis acid with a functional distance of the boron functions of 4.918(2) Å, the development of a further bifunctional, boron-containing Lewis acid with a wider functional distance is demonstrated. Again, a stannylated precursor was used and the Lewis-acidic boron functions were introduced by means of tin-boron exchange. The general suitability of this ...
DOI:
10.1515/znb-2021-0175