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.