Alkene Hydrosilation

Ammonia N-donor Ligands Asymmetric Synthesis by Homogeneous Catalysis Decarbonylation Catalysis Hydride Complexes of the Transition Metals Hydroboration Catalysis Hydrogenation Isomerization of Alkenes Hydrosilation Catalysis P-donor Ligands Rhodium Organometallic Chemistry. 

Catalytic hydrosilylation involves addition of a Si-H bond to an unsaturated substrate (equation 99). Alkene hydrosilation is a useful Si-C bond-forming reaction that has been extensively reviewed8,195,213,261 -263. It may be used to introduce functional groups... 

FIGURE 9.7 (a) The Chalk-Harrod mechanism for alkene hydrosilation. (b) An alternative mechanism in which insertion takes place into the M—Si bond. This accounts for the formation of vinylsilane, sometimes seen as a by-product in hydrosilation. 

The substituted iron carbonyls Fe(CO)4PPh3 and Fe(CO)3(PPh3)2 have also been examined as photocatalysts for hydrosilation however, the qualitative reactivity features were found to be similar to those of Fe(CO)s [74]. In addition the polymer anchored derivatives Fe(CO)4(PPh2-poly) and Fe(CO)3(PPh2-poly)2 (where PPh2-poly is the polystyrene bound diphenyl phosphine) proved to be effective photocatalysts for lx)th hydrosilation and hydrogenation [74]. Photocatalysis of alkene hydrosilation is also effected by metal carbonyl clusters [61]. 

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