Homogeneous Catalysis. IV. Hydrosilylation of Cyclic or Linear Dienes- Using Low-Valent Nickel Complexes and Related Experiments

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Terence "Terry" Nile, Professor (Creator)
The University of North Carolina at Greensboro (UNCG )
Web Site: http://library.uncg.edu/

Abstract: The hydrosilylation of cyclohexadienes using Ni(acac)2 -Al(OEt)Et2 gives only the allylic cyclohexenylsilane with both 1,3- or 1,4-(in presence of a phosphine) cyclohexadienes. The reactions with the isomeric cis- or trans-1, 3-pentadienes (giving 1:1 adducts), using the Ni(acac)2 -AlEt3 catalyst, are compared. 2, 3-Dimethy1-1, 3-butadiene readily gives mainly the product of 1,4- rather than 1,2-addition, but the proportion of the latter is increased by incorporating PPh3 into the catalyst. Ni(acac)2 with other reducing agents as cocatalysts are also effective. Other less reactive catalysts for linear 1, 3-dienes include [NiCl2(PPh3)2]-BunMgBr, and [Ni(dipy) (PhCN)2] –AlEt3, and for crotonaldehyde [Ni(dipy)(PhCN)2].

Additional Information

Journal of Organometallic Chemistry 132(1), 133.
Language: English
Date: 1977
cyclohexadienes, catalysts, crotonaldehyde

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