Relative Rates of Hydrosilylation of Representative Alkenes and Alkynes by Cp*2YMe·THF and [CpTMS2YMe]2
Authors:
- 15 September 1998
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Organic Chemistry
- Vol. 63 (20) , 7009-7012
Abstract
Reactivity in the hydrosilylation of alkenes and alkynes catalyzed by the organoyttrium catalysts Cp*2YMe·THF and [CpTMS2YMe]2 is generally determined by the steric environment of the substrate. Alkynes and conjugated alkenes show an increased reaction rate because of electronic effects; the magnitude of this increase is highly substrate dependent. The electron rich pyrrole system is particularly reactive, especially with the sterically open [CpTMS2YMe]2 precatalyst. For nonconjugated substrates, Cp*2YMe·THF is generally a more selective catalyst than [CpTMS2YMe]2.Keywords
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