Co-Oligomerization of 1,3-Butadiene and Ethylene Promoted by Zerovalent ‘Bare’ Nickel Complexes
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The transition-metal-catalyzed cyclooligomerization of 1,3-dienes and the co-oligomerization of 1,3-dienes and alkenes, that involve the stereoselective formation of carbon-carbon bonds, are of great interest from both a scientific as well as an industrial point of view. In this account a theoretical well founded, comprehensive mechanistic view of the [Ni0]-catalyzed co-oligomerization of 1,3-butadiene and ethylene is presented. The first suggested mechanism of Wilke and co-workers has been confirmed in essential details but supplemented by novel insights into how the catalytic co-oligomerization reaction operates. Furthermore, crucial aspects of important elementary steps of the [Ni0]-catalyzed generation of C10- and C12-olefins via butadiene/ethylene co-oligomerization and butadiene cyclooligomerization are compared.
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