SYNTHESIS, CHARACTERIZATION AND BIOLOGICAL-ACTIVITY OF COME COBALT(II), NICKEL(II), ZINC(II) AND CADMIUM(II) BENZOYLHYDRAZINE-AZIDE COMPLEXES

A series of metal(II) benzoylhydrazine-azide complexes of the type M(B H)(N-3)(2).3H(2)O where M = Co(II), Ni(II), Zn(ll), Cd(II) and BH = be nzoylhydrazine, C6H5CONHNH2, characterized by elemental analyses, magn etic susceptibility, electronic and IR spectral data. The complexes ar e highly insoluble, powdery materials and decompose without melting. C o(II) and Ni(II) complexes are paramagnetic and octahedral. BH acts as a bidentate ligand coordinating through >C=O and -NH2 groups. BH, Co( BH)(N-3)(2).3H(2)O and Ni(BH)(N-3)(2).3H(2)O, screened against cyanoba cteria Synechococcus cedrorum, a unicellular, non-nitrogen fixing meso philic blue green algae, show moderate inhibition of algal growth and formation of protein, carbohydrate and photosynthetic pigments (chloro phyll-a, carotenoids, phycocyanin). Carbon fixation studies, using C-1 4 labelled NaHCO3 solution Indicate that carbon fixation occurs in the order: Co(BH)(N-3)(2).3H(2)O > Ni(BH)(N-3)(2).3H(2)O > BH. The three compounds catalyse the photodecomposition and enhance the oxygen evolu tion during the photosynthesis in the order: Ni(BH)(N-3)(2).3H(2)O > C o(BH)(N-3)(2).3H(2)O > BH.