DIOXOURANIUM(VI) AND ZINC(II) COMPLEXES OF BIS(O-HYDROXYNAPHTHALDE)OXALOYLDIHYDRAZONE - SYNTHESIS AND SPECTRAL CHARACTERIZATION

The monometallic complexes [M(napoxlhH2)(H2O)2]n . 2nH2O [where M = UO 22+ and Zn2+, and napoxlhH4 = bis(o-hydroxynaphthalde)oxaloyldihydrazo ne] have been synthesized and characterized on the basis of the result s obtained from molar conductance data, electronic, IR and H-1 NMR spe ctral studies. It is proposed that the complex [UO2 (napoxlhH2)(H2O)2] n.2nH2O involves eight coordinated uraniums with six ligand atoms arra nged in the equatorial plane perpendicular to the linear uranyl group involving dihydrazone in the enolic form with cis configuration, where as [Zn(napoxlhH2)(H2O)2]n.2nH2O is octahedral involving enolic dihydra zone in the staggered configuration. The phenolic-OH groups remain unc oordinated.