The Synthesis and Ni(Ii), Co(Ii), Cu(Ii), Zn(Ii), Cd(Ii) and Hg(Ii) Complexes of Bis(Delta(2)-2-Pyrimidinyl)-6,6'-Dioxime Dihydrochloride

In this work, bis(Delta(2)-2-pyrimidinyl)-6,6-dioxime dihydrochloride (H(2)L . 2HCl) was synthesized by reacting anti-dichloroglyoxime with bis(Delta(2)-2-pyrimidinyl) (L) and complexes of the resulting vic-dioxime with Ni(II), Co(II), Cd(II) and Hg(II) were prepared. The Ni(II) and Co(II) complexes with a metal-ligand ratio 1:2 possess the mononuclear structure [M(HL)(2)] {M = Ni(II) or Co(II)}, white that of Cu(II) with a metal-ligand ratio of 3:2 possesses the trinuclear structure [Cu-3(HL)(2)Cl-4]. The Zn(II), Cd(II) and Hg(II) complexes of H(2)L have a metal-ligand ratio of 1:1 and [(HL)Cl(H2O)M] contains six-membered chelate rings. The reaction of mononuclear complexes of Ni(II) or Co(II) with Cu(lt) gives heterotrinuclear complexes [M M'(2)(HL)(2)Cl-4] {M = Ni(II) or Co(II) and M' - Cu(II)}. The structures of these complexes are proposed based on elemental analyses, i.r., and magnetic susceptibility measurements.