Abstract

A remarkable increase of both catalytic activity and the selectivity of dimers has been found for propylene dimerization affording 2,3-dimethylbutenes by a nickel-phosphine catalyst system composed of nickel naphthenate/P(cyclo-C6H11)3/A lEt3/ (CF3)2CHOH in the presence of CF3SO3H and/or Me2SO4: a combination of these effective additives also enhanced the reaction rates.

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