SYNTHESIS AND CHARACTERIZATION OF BIS(N-METHYL-N-ETHANOL-DITHIOCARBAMATO)M(II) (M = ZN, CD, HG) AND INODIETHYLENE)-BISPHTHALIMIDEDITHIOCARBAMATO)M(II) (M = ZN, CD, HG) COMPLEXES - SINGLE-CRYSTAL X-RAY STRUCTURE OF BIS(DI(2-HYDROXYETHYL)DITHIOCARBAMATO)ZINC(II)

M(nmedtc)(2) and M(padtc)(2) (where nmedtc(-) = N-methyl-N-ethanol-dit hiocarbamate anion; padtc(-) = ,N'-(iminodiethylene)bisphthalimidedith iocarbamate anion; M = Zn(II), Cd(II), Hg(II)) complexes were synthesi zed and characterized. Zinc and cadmium complexes are tetrahedral. Spl itting of the nu C-S band in Cd(nmedtc)(2) indicates anisobidentate co ordination of the ligand. The mercury analogue is polymeric. Thioureid e nu C-N bands for Cd(nmedtc)(2) and Hg(padtc)(2) appear at relatively low energy due to the large sizes of the cadmium and mercury ions in comparison with zinc. Thermal studies have been carried out. Unit cell constants of Zn(deadtc)(2) are a = 29.017(2) Angstrom, b = 8.611(4) A ngstrom, c = 14.045(2) Angstrom, beta = 103.2(1)degrees, space group C 2/c. The coordination polyhedron is a distorted trigonal bipyramid. Th ioureide C-N is 1.489(5) Angstrom, which is significantly longer than observed in the corresponding diethyl analogue (1.325(9) Angstrom). Zn -Zn' is 3.485(3) Angstrom compared to 3.546(3) Angstrom observed in th e diethyl analogue.