MIXED-LIGAND COMPLEXES OF ZINC(II) AND CADMIUM(II) DIETHYLDITHIOCARBAMATES WITH 2,2'-BIPYRIDYL AND 4,4'-BIPYRIDYL - SYNTHESIS, STRUCTURE, AND THERMAL-PROPERTIES

We have synthesized novel mixed-ligand complexes of zinc(II) and cadmi um(II) diethyldithiocarbamates ZnL2(2,2'-Bipy) (1), Zn2L4(4,4'-Bipy) ( 2), and CdL2(4,4'-Bipy) (3), where L = (C2H5)2NCS2-. An X-ray structur al study, of zinc complexes 1 and 2 has been carried out. The structur e of complex 1 is characterized by monomeric molecules of symmetry 2. In the crystal structure of complex 2, there are two independent binuc lear molecules of the same point symmetry 2. It is shown that not only the mononuclear mixed-ligand complexes ML2 with Phen and 2,2'-Bipy (M = Zn, Cd) but also the binuclear Zn2L4(4,4'-Bipy) complex are volatil e.