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Metallo-Cryptophanes Decorated with Bis-N-Heterocyclic Carbene Ligands: Self-Assembly and Guest Uptake into a Nonporous Crystalline Lattice
- Henkelis, James
J., Carruthers, Christopher J., Chambers, Scott E., Clowes, Rob, Cooper, Andrew I., Fisher, Julie, Hardie, Michaele J.
- Journal of the American Chemical Society 2014 v.136 no.41 pp. 14393-14396
- iodine, ligands, organic compounds, porosity
- Pd₃L₂ metallo-cryptophane cages with cyclotriveratrylene-type L ligands can be stabilized by use of a bis-N-heterocyclic carbene as an auxiliary cis-protecting ligand, while use of more common protecting chelating ligands such as ethylenediamine saw a Pd₃L₂ to Pd₆L₈ rearrangement occur in solution. The crystalline Pd₃L₂ complexes act as sponges, taking up 1,2-dichorobenzene or iodine in a single-crystal-to-single-crystal fashion despite not exhibiting conventional porosity.