The hydrosilylation of terminal alkynes by silanes catalyzed by N -heterocyclic carbene platinum(0) complexes has been investigated. The alkynes included 1-octyne and phenylacetylene. The silanes investigated were bis(trimethylsilyloxy)methylsilane, (trimethylsilyloxy)dimethylsilane, tert -butyldimethylsilane, triphenylsilane, phenyldimethylsilane, triethylsilane, and triethoxysilane. X-ray crystal structures for [Pt( N, N ‘-dicyclohexylimidazol-2-ylidene)(η 2 -dimethylacetylenedicarboxylate) 2 ] ( 8 ) and [Pt{C(E) C(E)−C(E) C(E)}( N, N ‘-dimethylbenzimidazol-2-ylidene)(σ-NCCH 3 )] ( 10 ) (E = CO 2 Me) have been obtained. A selectivity model, based on structural parameters of the N- heterocyclic carbene, has been devised in order to rationalize the observed regioselectivity obtained. By a judicious choice of catalyst, alkyne, and silane, the regioselectivity of the addition can be controlled.
No takes yet. Share an insight, caveat, or question.
Bo et al. (2006) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: