Oxidovanadium(IV) complexes containing ligands derived from dithiocarbazates _ Models for the interaction of VO2+ with thiofunctional ligands

摘要

The tetragonal_pyramidal VO2+ complexes [VO{(RSC_S)@N_N@X}2] (1_6) were synthesised by the reactions of VO(OCHMe2)3 with the dithiocarbazate ligands RSC(@S)_NH_N@X, where X = cyclo-pentyl, cyclohexyl or 4-Me2N_C6H4_CH, and R = CH3 or CH2C6H5. The compounds were characterised by elemental analysis, IR- and mass spectrometries, and in cases of compounds 1, 3, 4 and 5, by X-ray diffraction. The chiral compound 4 (X = cyclo-hexyl, R = CH2C6H5) crystallises in the C configuration. In compound 5, the V@O moiety is disordered (83.3:16.7%) with respect to the plane spanned by the four equatorial ligand functions.