two-electron oxidation product 3 is mainly attributed to the RuII→FeIII MMCT transitions. According to the classification of Robin and Day, compounds 2, 3 and 5 belong to the class II mixed-valence compounds. The IR spectra, MMCT band and redox splitting of compounds 2 and 5 indicate that replacing the py ligand in the central unit with MeOpy shows better electronic communication properties.
氰化物桥接化合物trans -[Cp(dppe)Fe II (NC)Ru II (py) 4 (CN)Fe II (dppe)Cp][PF 6 ] 2 ( 1 , py = pyridine, dppe = bis (diphenylphosphino )
乙烷, Cp =
环戊二烯基阴离子),反式-[Cp(dppe)Fe II (NC)Ru II (py) 4 (CN)Fe II I (dppe)Cp][PF 6 ] 3 ( 2 ),反式-[ Cp(dppe)Fe III (NC)Ru II (py) 4 (CN)Fe III(dppe)Cp][PF 6 ] 4 ( 3 ),反式-[Cp(dppe)Fe II (NC)Ru II (MeOpy) 4 (CN)Fe II (dppe)Cp][PF 6 ] 2 ( 4 , MeOpy =
4-甲氧基吡啶)和反式-[Cp(dppe)Fe III