A cobalt induced cleavage reaction and a new series of arenecobalt carbonyl complexes

Abstract
Reaction of bicyclo[2,2,1]hepta-2,5-diene with alkynedicobalt hexacarbonyls in inert solvents gives dicarbonylcyclopentadienylcobalt, but in aromatic hydrocarbons arene-nonacarbonyltetracobalt complexes are formed.