Coupling of two phosphaalkynes via a carbonyl group in the addition across a rhrh double bond

✍ Scribed by Peter B. Hitchcock; Mohd Jamil Maah; John F. Nixon

• Book ID: 102846427
• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 728 KB
• Volume: 2
• Category: Article
• ISSN: 1042-7163
• DOI: 10.1002/hc.520020206

✦ Synopsis

Abstract

Phosphaalkynes, RCP (R = Bu^t^, Adamantyl), add across the RhRh double bond of [Rh~2~Cp(CO)~2~] to give either [Rh~2~Cp(μ‐CO)(COPCR)] or [Rh~2~Cp(CO){PCRC(O)CRP}] depending on the stoichiometry of the reaction (Cp* = η^5^‐C~5~Me~5~). The structures of these complexes have been elucidated by NMR spectroscopy and by a single crystal X‐ray study on [Rh~2~Cp(CO){PCAdC(O)CPAd}]. Small amounts of the 1,3‐diphosphacyclobutadiene complexes [RhCp*(P~2~C~2~R~2~)] and the trinuclear compound [Rh~3~Cp(CO)~2~] are also formed in these reactions. The reactions of RCP with [CoRhCp~2~*(CO)~2~] are also described.A preliminary account of part of this work has appeared in J. Chem. Soc., Chem. Commun., 1987, 658.