Synthesis, Infrared Spectroscopic, and Cyclic Voltammetric Studies on 1,10-Phenanthroline and 2,2' -Bipyridine Adducts of Bis(4-morpholinecarbodithioato-S,S')zinc(II) and Single-Crystal Structure Determination of (2,2' -Bipyridine)bis(4-morpholinecarbodithioato-S,S') zinc(II)

(1,10-Phenanthroline)bis(4-morpholinecarbodithioato-S,S')zinc(II), [Zn(mdtc)2(1,10-phen)] (1) and (2,2' -bipyridine)bis(4-morpholinecarbodithioato-S,S') zinc(II), [Zn(mdtc)2(bipy)] (2) adducts were prepared, and the crystal structure of 2 is reported. The Zn-S distances in 2 are longer than those in [Zn(dtc)2](dtc = dithiocarbamate) complexes. The acceptance of an additional neutral ligand by the tetrahedral dithiocarbamato complex of zinc to form an octahedral adduct causes an increase in the Zn-S bond lengths and a consequent lowering of the S-Zn-S bite angle. The cyclic voltammetric study on the complexes shows an increase of electron density on the central metal ion in the adducts compared to Zn(mdtc)2. The use of HMDE as a working electrode in the CV studies indicate the involvement of Hg in complex formation, which is otherwise absent with a platinum working electrode. The thioureide C-N distance of 1.330 (4) in compound 2 is in line with the C-N observed at 1465 cm-1.