Vanadium (III), oxovanadium (IV) and oxovanadium (V) trifluoro-methanesulfonates

Abstract V(SO 3 CF 3 ) 3 , VO(SO 3 CF 3 ) 2 and VO(SO 3 CF 3 ) 3 have been prepared by reacting V(O 2 CCF 3 ) 3 , VO(O 2 CCF 3 ) 2 and VOC1 3 with HSO 3 CF 3 . The i.r. data suggest a bridging bidentate nature for SO 3 CF 3 groups. The diffuse reflectance spectrum of V(SO 3 CF 3 ) 3 suggests hexacoordination of vanadium, whilst that of VO(SO 3 CF 3 ) 2 is comparable to either five or six coordinated oxovanadium (IV) systems. The magnetic moments of V(SO 3 CF 3 ) 3 and VO(SO 3 CF 3 ) 2 are slightly lower than the spin-only values. Thermal decomposition of these triflates is simple. All the three triflates form coordination complexes with pyridine, 2, 2′-bipyridyl and triphenylphosphine oxide.