Organocobalt complexes. Part I. Arene complexes derived from dodecacarbonyltetracobalt

Abstract

A series of tetranuclear arenecobalt carbonyls, ArHCo₄(CO)₉, are formed by treating hexacarbonylacetylenedicobalt complexes, (R¹C₂R²)Co₂(CO)₆, with arenes in the presence of norbornene derivatives, or from the cobalt carbonyls Co₄(CO)₁₂ and Co₂(CO)₈ by direct reaction with arenes. Stable complexes are obtained from alkyl- and alkoxy-benzenes, but not from halogeno- or acyl derivatives. The spectroscopic properties of the new complexes are reported.