Remarkable reactions of cationic carbyne complexes of manganese, rhenium, and diiron with carbonylmetal anions

摘要

The cationic carbyne complexes of manganese and rhenium, [η~5-C_5H_5(CO)_2Mn≡CPh]BBr_4 (1) and [η~5-C_5H_5(CO)_2Re≡CPh]BBr_4 (2), are the entry points for the synthesis of a variety of di- or tri-metal bridging carbene and bridging carbyne complexes resulting from nucleophilic attack on the carbyne carbon. Both cationic complexes, 1 and 2, undergo a wide range of reactions with carbonylmetal mono- and di-anions, mixed-dimetal carbonyl anions, and reactive salts. Analogous studies of diiron cationic carbyne complexes [Fe_2(μ-CO)(μ-CAr)(CO)_2(η~5-C_5H_5)_2]BBr_4 (Ar = C_6H_5, p-MeC_6H_4) and [Fe_2(μ-CO)(μ-CAr)(CO)_2{(η~5-C_5H_4)_2Si-Me_2}]BBr_4 (Ar = C_6H_5, p-MeC_6H_4, p-CF_3C_6H_4) are also reviewed.