Formation of co-ordinated diphenylketen from carbon monoxide and an alkylzirconocene(IV) benzhydryl complex: X-ray structure of [{Zr(η-C5H5)2(OCCPh2)}]2

Abstract

The zirconocene (IV) dialkyls [Zr(η-C₅H₅)₂(CHPh₂)R][R = Me, (1), or CH₂SiMe₃(2)]react under ambient conditions with CO during 1–2 days in OEt₂or C₆H₆ to give [{Zr(η-C₅H₅)₂(OCCPh₂)}₂](3),[58%from (2)],as well as [Zr(η-C₅H₅)₂{η-²C(O)R}CHPh₂][24%from (2)];the X-ray structure of complex (3) shows that the molecule contains the nucleus [graphic omitted], with each of the Zr–O distances equal, 2.165(3)Å, and Zr–C = 2.204(3)Å.