Journal of the American Chemical Society, Vol.133, No.41, 16374-16377, 2011
High Electrophilicity at Silicon in eta(3)-Silane sigma-Complexes: Lewis Base Adducts of a Si lane Ligand, Featuring Octahedral Silicon and Three Ru-H-Si Interactions
New eta(3)-silane alpha-complexes [PhBP3Ph]RuH-(eta(3)-H2SiRR') (RR' = PhMe, Ph-2) were synthesized. Lewis bases [THE, 4-(dimethylamino)pyridine, and PMe3] coordinate to the silicon centers of these complexes to form stable adducts. The base adducts, [PhBP3Ph]Ru(mu-H)(3)SiRR'-(base), feature three nonclassical Ru H Si interactions and hexacoordinate silicon centers, as determined by multinuclear NMR spectroscopy, X-ray crystallography, and computational investigations.