New methods for studying the mechanism of the π,σ-reaction in allylic metal complexes

Abstract
The n.m.r. spectrum of the compound (π-C4H7)PdCl(PPhMeMe′) reveals two simultaneous interchange reactions—interchange of the two nonequivalent methyl groups and interchange of allyl protons (3) and (4)—thus proving that the intermediate of the (3)–(4) interchange reaction contains a σ-bonded methyllyl group.

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