Synonyms: Cobalt,dicarbonyl(pentamethyl-p-cyclopentadienyl)- (8CI); 1,3-Cyclopentadiene, 1,2,3,4,5-pentamethyl-,cobalt complex; (Pentamethylcyclopentadienyl)cobalt dicarbonyl; (h5-Pentamethylcyclopentadienyl)cobaltdicarbonyl; Dicarbonyl(pentamethyl-p-cyclopentadienyl)cobalt; Dicarbonyl(pentamethylcyclopentadienyl)cobalt;Dicarbonyl(h5-pentamethylcyclopentadienyl)cobalt