Enhanced Reactivity of Cationic vs Neutral Hafnocene Complexes in Stoichiometric and Catalytic σ-Bond Metathesis Reactions Involving Si−H and Si−C Bonds — Aaron D. Sadow (2001) | RDL Network
Enhanced Reactivity of Cationic vs Neutral Hafnocene Complexes in Stoichiometric and Catalytic σ-Bond Metathesis Reactions Involving Si−H and Si−C Bonds
A comparison of the cation-like complex CpCp*HfH(μ-H)B(C6F5)3 with the neutral analogue CpCp*HfHCl reveals increased activity toward σ-bond metathesis for the more electrophilic, cationic complex. A catalytic transformation of PhSiH3 to Ph2SiH2 and SiH4 by CpCp*HfH(μ-H)B(C6F5)3 appears to occur by σ-bond metathesis of the Si−C bond, which occurs concurrently with dehydropolymerization to highly cross-linked polysilanes.
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