Synthetic, structural, electrochemical and electronic characterisation of heterobimetallic bis(acetylide) ferrocene complexes

摘要: A series of novel heterobimetallic bis(acetylide) ferrocene complexes featuring a bis[1,2-bis(diphenylphosphino)methane]ruthenium centre and seven variously substituted aromatic acetylene ligands have been synthesised and characterised. The crystal structure of trans-[Ru(dppm) 2 {CC(C 5 H 4 )Fe(C 5 )} 2 ] shows the ruthenium in distorted-octahedral environment bound to two units linear fashion by ‘rigid-rod’-like acetylene linkages. conformation is stabilised strong intramolecular CH· · ·π(CC) interactions. Electrochemical studies showed that incorporation donor-substituted aromatic acetylide causes cathodic shift the Ru II/III redox potential. Conversely, an anodic is observed when electron-withdrawing substituents are present the acetylide systems. Electronic spectral measurements indicated the systems belong to Robin Day ‘Class II’ mixed-valence species suggest greater electronic interaction occurs the bis(acetylide) complexes than corresponding monoacetylide chloro-complex.