Chemistry of methylinyltricobalt enneacarbonyls. Part IX. Reactions with Grignard and organolithium reagents

Abstract

Aryl Grignard reagents react with halogenomethinyltricobalt enneacarbonyls to give the corresponding aryl-clusters in good yield. Substitution with alkyl Grignard reagents is not possible. Reactions with organolithium and Grignard reagents (under a CO atmosphere) invariably give products formed by CO insertion, principally the acid, HO₂CCCo₃(CO)₉. Possible intermediates in these reactions are discussed.