An unprecedented mode of ligation for a bridged amido-cyclopentadienide (constrained geometry) ligand; π-olefinic interactions with gallium and indium

Abstract

The surprising reaction of GaCl₃ or InBr₃ with the di-Grignard reagent [Me₂Si(C₅Me₄)(N-t-Bu)](MgCl)₂·THF results in salts of the bimetallic anions of composition [X₃M{C₅Me₄ (N-t-Bu)}MX₂]⁻ (M = Ga, X = Cl; M = In; X = Br) in which the MX₂ moiety undergoes an η²-interaction with one of the double bonds of the localized cyclopentadienide ring.