In Search of a Versatile Pathway to <i>ansa</i>-Chromocene Complexes. Synthesis and Characterization of the Highly Unstable <i>ansa-</i>Chromocene Carbonyl Complex Me<sub>2</sub>C(C<sub>5</sub>H<sub>4</sub>)<sub>2</sub>CrCO
作者:Philippe Perrotin、Pamela J. Shapiro、Mark Williams、Brendan Twamley
DOI:10.1021/om061136u
日期:2007.3.1
In an effort to develop a general synthetic route to ansa-chromocene complexes with diverse ligand frameworks, we investigated ansa-magnesocene compounds as an alternative, potentially more versatile ligand source than ansa-calcocene compounds. The first single-carbon-bridged ansa-chromocene compound, Me2C(C5H4)(2)CrCO, was isolated from the reaction between Me2C(C5H4)(2)Mg and CrCl2 in THF under an atmosphere of carbon monoxide. This new ansa-chromocene compound is considerably more air-sensitive and less chemically stable than its ethanediyl-bridged counterparts.