OXO AND NON-OXOVANADIUM(IV) COMPLEXES WIT H OXY-CARBOXYLATE LIGANDS, AND THE STRUCTURE OF VCL2(SALEN)

VO2+ forms complexes of composition VO(L(1))(EtOH), VO(HL(1))(2) and V O(HL(2))(H2O) with the lithium or sodium salts of 6-hydroxymethyl-pyri dine-2-carboxylic acid (H(3)L(2)) and 4,8-dihydroxyquinoline-2-carboxy lic acid (H(3)L(2)). VCl2(salen/salphen) and VCl2(napgly/nappa) (napgl y and nappa are the Schiff bases derived from o-hydroxynaphthaldehyde and glycine or phenylalanine, respectively), prepared from the oxo pre cursor and SOCl2, react with Li(2)L(1) and the lithium salts of benzil ic acid (H(2)L(3)) and ortho-hydroxybenzoic acid (H(2)L(4)) to yield t he non-oxo (''bare'') complexes V(salen)L(1), V(salen)L(3), V(salphen) L(3), V(salen)L(4), V(napgly)L(1), V(nappa)L(1) and V(nappa)L(4) The c omplexes have been characterized by IR, EPR and elemental analyses. VO Cl2(salen) crystallizes in the monoclinic space group Cc, a = 14.579(3 ), 6 = 9.537(2), c = 13.453(3) Angstrom, beta = 120.92(3)degrees. The molecule exhibits gross distortions from octahedral geometry. An impro ved synthesis for H(2)L(1) is described.