Construction of Novel Oligonuclear Complexes from Metal Coordinated Hydrocarbons and Cyclopentadienylcobalt Fragments

Abstract

Cyclopentadienylcobalt fragments [CpCo] are used as the building blocks of oligonuclear complexes with hydrocarbons as bridging ligands. The main reaction routes are addition of several [CpCo] to an unsaturated hydrocarbon ligand, often resulting in an unusual coordination mode of the latter, and CH-activation. The range of addition products includes dinuclear complexes of hexatriene, cycloheptatriene and alkenylbenzenes as well as cluster complexes with face capping arene ligands. The more important products from CH-activation are CpCo-complexes of cobaltafulvenes, dinuclear cycloheptatrienyl bridged heterobimetallic hydrido complexes and cluster complexes with face capping alkylidyne or alkyne ligands.

Key Words:

• cyclopentadienyl
• cobalt
• hydrocarbon
• CH-activation
• cluster