Novel cobalt complexes featuring five-coordinate silicon centers with a covalent CoSi bond, i.e., [(SiN2C)Co(OPy)] complexes (SiN2C = tetradentate silane-anchored bis(pyridine)-N-heterocyclic carbene (NHC) ligand, OPy = 2-pyridonato), were prepared by reaction of bidentate hydrosilyl-NHC-supported cobalt(II) complexes with 2-pyridone and characterized by H-1, C-13, and Si-29 NMR, single-crystal X-ray diffraction, and elemental analyses. Theoretical calculations support a covalent nature of the CoSi interaction, in contrast to the metal -> Si dative bonds in metallasilatranes.
Sun J,Ou C,Wang C,et al. Silane-Functionalized N-Heterocyclic Carbene-Cobalt Complexes Containing a Five-Coordinate Silicon with a Covalent Co-Si Bond[J]. Organometallics,2015,34(8):1546-1551.
