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Synthesis, solid-state structures and reduction reactions of heteroleptic Ge(II) and Sn(II) β-ketoiminate complexes
- Wiederkehr, Jessica, Wölper, Christoph, Schulz, Stephan
- Zeitschrift für Naturforschung 2017 v.72 no.11 pp. 813-820
- X-ray diffraction, infrared spectroscopy, ligands, magnesium, nuclear magnetic resonance spectroscopy, reducing agents, stable isotopes, tin
- A series of new heteroleptic divalent germaniun and tin complexes of the general type L¹,⁴GeN(SiMe₃)₂ (1, 2) and L¹⁻⁴SnN(SiMe₃)₂ (3–6) were synthesized by reaction of β-ketimines L¹⁻⁴H with Ge[N(SiMe₃)₂]₂ and Sn[N(SiMe₃)₂]₂, respectively. The reaction of 3 with the strong Mg(I) reductant L⁵Mg yielded the heteroleptic complex L¹MgL⁵ 7 after ligand transfer from tin to magnesium, whereas analogous reactions of L⁴GeN(SiMe₃)₂ 2 and L⁴SnN(SiMe₃)₂ 6 with L⁵Mg occurred with formation of insoluble precipitates, transfer of the amido substituent from the group 14 metal to magnesium and subsequent formation of the heteroleptic magnesium complex L⁵MgN(SiMe₃)₂ (8). 1–8 were characterized by heteronuclear NMR (¹H, ¹³C, ¹¹⁹Sn) and IR spectroscopy, elemental analysis and single-crystal X-ray diffraction (L⁴SnN(SiMe₃)₂ 6, L¹MgL⁵ 7).