The reaction of VO(acac)2 with 2-hydroxyl-1-naphthaldehyde isonicotinyl hydrazone and amines (ethylenediamine or diethylenetriamine) in CH3OH yields crystals of novel vanadium compounds characterized by IR, NMR spectroscopic methods and X-ray single-crystal structure determination. Two different vanadium units exist in the crystal cell of [VO2(C17H11N3O2)][VO-(C4H13N3)(C6H5N3O)](C2H5OH) which crystallizes in the triclinic system, space group P1 with a= 8.0104(17), b=13.898(3), c =14.955(3), α =89.103(4), β=79.551(4), γ=78.352(4)°, V= 1603.3(6)3, Mr=723.54, Dc=1.499 g/cm3, Z=2, λ(MoKα)=0.71073, μ=0.644 mm-1, F(000) =748, the final R=0.0547 and wR=0.0997 for 8920 observed reflections with I > 2σ(I). According to structure analysis, two different molecules are arranged in the lattice and the two vanadium atoms adopt octahedral and square pyramidal coordination geometries, respectively. The interactions between DNA and vanadium complexes have been investigated by UV-Vis absorption spectro-photometry.
