Reactions of cationic carbyne complexes of manganese and rhenium with metal carbonyl anions

Abstract

Treatment of [(η-C5H5)(OC)2MnCC6H5]BBr4 1 and [(η-C5H5)(OC)2ReCC6H5]BBr4 2 with the carbonyl monoanion [Mn(CO)5]– 3 in THF at low temperature afforded the ketenyl bridged complexes [Mn2{µ-C(CO)C6H5}(CO)6(η-C5H5)] 6 and [ReMn{µ-C(CO)C6H5}(CO)6(η-C5H5)] 7 respectively. The analogous reactions of complexes 1 and 2 with [Co(CO)4]– 4 gave corresponding ketenyl bridged complexes [MnCo{µ-C(CO)C6H5}(CO)5(η-C5H5)] 8 and [ReCo{µ-C(CO)C6H5}(CO)5(η-C5H5)] 9 respectively. Complexes 1 and 2 reacted with the carbonyl dianion [W(CO)5]2– 5 to give the dimetal carbene bridged complexes [MnW{µ-C(H)C6H5}(CO)7(η-C5H5)] 10 and [ReW{µ-C(H)C6H5}(CO)7(η-C5H5)] 11 respectively. The structures of complexes 6, 9 and 11 have been established by X-ray diffraction studies.