Influence of a [Me2Si] ansa bridge on the barrier to rotation about the Zr–phenyl bond and on the generation and reactivity of benzyne intermediates: comparison of the structures and reactivity of [Me2Si(C5Me4)2]Zr(Ph)X and Cp*2Zr(Ph)X (X = H, Cl, Ph)
Abstract
Comparison of the chemistry of [Me2Si(C5Me4)2]ZrPh2 and Cp*2ZrPh2 demonstrates that incorporation of a [Me2Si] ansa bridge reduces the barrier for both (i) rotation about the Zr–Ph bond and (ii) elimination of