A homologous series of group 8 hydrotetrylene complexes of the type Cp*(R3P)MH=EH(DMP) (M = Fe, Ru, Os; E = Si, Ge; DMP = 2,6-dimesitylphenyl; R3P = iPr2MeP or iPr3P) has been prepared. The M=E bonding in this system has been investigated using a combination of NMR, vibrational (IR and resonance Raman), and electronic spectroscopy. Supported by DFT calculations, a number of spectroscopic features are identified which are diagnostic for M=E π bonding. This information has implications for the reactivity which can be expected for silylene complexes of 3d metals, which is exhibited in reactivity differences between the iron silylene complex and those of ruthenium and osmium.

Bonding in group 8 silylene complexes

253rd National Meeting (2017)

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