S. Bywater, D. Worsfold
Oct 1, 1967
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Journal
Journal of Organometallic Chemistry
Abstract
Abstract The degree of association of sec-butyllithium has been shown to be fourfold in both benzene and cyclohexane solution. In benzene solution the order of reaction in butyllithium when sec-butyllithium reacts with either styrene or isoprene has been shown to be 1 4 . In cyclohexane, however, the reaction curves with both monomers are sigmoidal, and the maximum rate shows a dependence on butyllithium nearer first. This behaviour difference is compared with the behaviour of other lithium alkyls in their reactions in aromatic and aliphatic solvents. It is suggested that two different mechanisms apply in aromatic and in aliphatic solvents because of the large difference in the rates of dissociation of the aggregates in the two types of solvent.