Novel ring-opened reaction of μ-(1–3-η:4–7-η-cycloheptatrienyl)-tricarbonylirontricarbonylmanganese with aryllithium reagents

Abstract

The reactions of µ-(1–3-η:4–7-cycloheptatrienyl)tricarbonylirontricarbonylmanganese [Mn(CO)3Fe(CO)3- (C7H7)] 1, with aryllithium reagents, ArLi (Ar = Ph, o-, m-, p-MeC6H4), in ether at low temperature, followed by alkylation of the acylmetalate intermediates with Et3OBF4 in aqueous solution at 0 °C affords four novel ring-opened polyene complexes [Mn(CO)3Fe(CO)3{C8H7(OEt)Ar}] (Ar = Ph 2, o-MeC6H4 3, m-MeC6H4 4, p-MeC6H4 5), of which the structure of 2 has been established by a single-crystal X-ray diffraction study.