Synthesis, structures and reactivity of two oxidovanadium(IV) and dioxidovanadium(V) selenosemicarbazonato complexes

► We report the preparation and spectral characterisation of the first vanadium complexes with selenosemicarbazone ligands. ► The structures of an oxovanadium(IV) and a dioxovanadium(V) complex are presented. ► Some preliminary reactivity studies have been carried out with the vanadium(IV) compound.