ZINC(II), CADMIUM(II) AND MERCURY(II) COMPLEXES OF 2,5-DIMETHYL-1,3,4-THIADIAZOLE

The zinc(II), cadmium(II) and mercury(II) complexes of 2,5-dimethyl-1,3,4-thiadiazole: M(DTZ)X2 (MCd, XCl, NO3(H2O): MHg, XCl, Br,I) and M(DTZ)2X2 (MZn, XCl,Br,I, NO3(H2O); MCd, XBr,I; MHg, XNO3) were prepared and investigated. All the complexes behave as non-electrolytes in nitromethane solution; all the anion are coordinated, the nitrate group as monodentate. The M(DTZ)2X2 have a tetrahedral [N2X2] coordination, the ligand molecule acting as N-monodentate. The Cd(DTZ)Cl2 complex has a presumable polymeric coordination with the ligand molecule and the chloride ions, each differently coordinated. The Cd(DTZ)(NO3)2·H2O seems to have a tetrahedral [N,H2O,(ONO2)2] coordination with N-monodentate ligand. The Hg(DTZ)X2 (XCl,Br,I) complexes have a tetrahedral [N2X2] coordination with a N,N-bridging ligand molecule. © 1979.