... 0002-7863/84/1506-4152$01.50/0 0 1984 American Chemical Society ... the ( pentamethylcyclopentadieny1)- cobalt(II1) halides [Co(pmcp)X,], (X = C1, Br)'vZ3 prompted us to investigate ... cobalt complexes 32+ has largely impeded a closer investigation of their chemical ...