Syntheses, structural characterisation and electronic structures of some simple acyclic amino carbene complexes

摘要

Reactions of the vinylidene complexes [M(vCvCH(2))(PP)Cp']PF6 with NH3 readily afford the acyclic amino carbene complexes [M{C(Me)NH2}(PP)Cp']PF6 [M(PP)Cp' = Fe(dppe)Cp, Ru(dppe)Cp, Ru(PPh3)(2)Cp, Ru(dppe)Cp*]. Crystallographic, spectroscopic and computational data support a description of these complexes in terms of a M-C(Me)=N+H2} mesomeric form, and simple sigma-coordination of the singlet acyclic amino carbene.