Synthesis of mixed-valence trinuclear carbonylmanganese dithiolates: Promoting vacant coordination sites in tricarbonyl[(1-5-h)-pentadienyl]manganese

摘要

Mixed-valence complexes Mn_3(CO)_6(m-S(CH_2)nS-k~2-S'S')_3 n = 2, 3, and 4 were prepared upon reaction of tricarbonyl[(1-5-η)-pentadienyl]manganese with the respective alkanedithiols at room temperature in good yields. The three metal centers are bound by thiolate bridges with no metalemetal bonds; one manganese atom exhibits a formal oxidation state of t4; while the other two possess an oxidation state of +1. EPR and X-ray analysis showed an octahedral environment around the manganese centers.