Catalytic Hydrosilylation of Alkenes by a Ruthenium Silylene Complex. Evidence for a New Hydrosilylation Mechanism

Catalytic Hydrosilylation of Alkenes by a Ruthenium Silylene Complex. Evidence for a New Hydrosilylation Mechanism

Novel ruthenium and osmium silylene species containing Si−H bonds have been synthesized and characterized by NMR spectroscopy. The ruthenium complex [Cp*( i Pr3P)(H)2RuSi(H)Ph·Et2O][B(C6F5)4] catalyzes the hydrosilyation of alkenes with excellent substrate selectivity for primary silanes and exclus...

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Veröffentlicht in:Journal of the American Chemical Society 2003-11, Vol.125 (45), p.13640-13641
Hauptverfasser: Glaser, Paul B, Tilley, T. Don
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Exact sciences and technology
Kinetics and mechanisms
Organic chemistry
Reactivity and mechanisms
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Beschreibung
Zusammenfassung:Novel ruthenium and osmium silylene species containing Si−H bonds have been synthesized and characterized by NMR spectroscopy. The ruthenium complex [Cp*( i Pr3P)(H)2RuSi(H)Ph·Et2O][B(C6F5)4] catalyzes the hydrosilyation of alkenes with excellent substrate selectivity for primary silanes and exclusive anti-Markovnikov regiochemistry. Evidence for a novel mechanism involving direct addition of an alkene to the silylene Si−H bond is presented.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja037620v