Synthesis and crystallographic characterization of [2,2-bis­(η5-penta­methyl­cyclo­penta­dien­yl)-3,4-bis(tri­methyl­sil­yl)-2-zircona­furan-5-one-κO5]triisobutyl­aluminium

Abstract

The crystal structure of the title zwitterionic zirconocene complex containing a furan­one unit, [AlZr(C10H15)2(C4H9)3(C9H18O2Si2)], is reported. On reacting a zircona­furan­one with two equivalents of HAl(i-Bu)2, disproportionation of the Lewis acid results in the formation of a triiso­butyl­aluminium fragment, Al(i-Bu)3, which coordinates to the exocyclic carbonyl O atom of the zircona­furan­one ring. Single-crystal X-ray diffraction reveals that the zircona­furan­one ring remains intact with coordination of the aluminium to the exocyclic O atom. One of the i-butyl groups is disordered over two sets of sites, with an occupancy ratio of 0.731 (3):0.269 (3).