Synthesis and characterization of coordination compounds of Cd(II), Co(II), Ni(II), Cu(II) and Zn(II) with rutin

The synthesis, characterization and electrochemical properties of five novel coordination compounds of rutin with transition metal [M = Cd(II), Co(II), Ni(II), Cu(II) and Zn(II)] are reported here. These coordination compounds may be formulated as [M3L2(H2O)n](CH3COO)(2) (n=6,12). Three hydroxy groups on the unsaturated rings form coordination bonds with the metal ions. The cyclic voltammetric data show changes in the redox potentials and currents of the coordination compounds relative to that of rutin. Formation of the coordination compounds changes the rigidity of rutin molecular plane and has a little influence on the antioxidation of rutin.