Oxidative Addition von Halogenpentamethylcyclopentadienen an Metallcarbonyle: ein einfaches Verfahren zur Synthese von (η5‐Pentamethylcyclopentadienyl)metallhalogeniden

Oxidative Addition of Halogenopentamethylcyclopentadienes to Metal Carbonyls: A Simple Method for the Synthesis of (η5‐Pentamethylcyclopentadienyl)metal Halides The alkyl halides 5‐chloro‐1,2,3,4,5‐pentamethyl‐1,3‐cyclopentadiene (1), 5‐bromo‐1,2,3,4,5‐pentamethyl‐1,3‐cyclopentadiene (2) and 5‐iodo‐1,2,3,4,5‐pentamethyl‐1,3‐cyclopentadiene (3) add oxidatively to the metal centres of carbonyl complexes of group‐8 elements. Thus, 1 and 2 react with Fe(CO)5 to give compounds of the type (C5Me5)Fe(CO)2X (X = Cl, Br) (4, 5). Irradiation of Ru3(CO)12 together with 1 and 2 yields the compounds (C5Me5)Ru(CO)2X (X = Cl, Br) (6, 7). Reaction of 1, 2, and 3 with Co2(CO)8 and Ni(CO)4 leads to halide‐bridged dinuclear complexes of the type [(C5Me5)MX]2 (M = Co, Ni; X = Cl, Br, I) (8–12).