Dienyl complexes of transition metals. Part I. The addition of hydride to methyl-substituted arenecyclopentadienyliron cations

Abstract

The addition of hydride to a series of methyl-substituted arenecyclopentadienyliron cations has been shown to occur exclusively at the arene ring, giving π-cyclohexadienyl derivatives. The methyl substituents influence the mode of reaction only insofar as hydride addition to an unsubstituted arene carbon is preferred. The ¹H n.m.r. spectra of these compounds are discussed.