Istituto dei materiali per l'elettronica ed il magnetismo     
Prakasam B. A., Ramalingam K., Bocelli G., Cantoni A. Spectral, BVS, and Thermal Studies on Bisdithiocarbamates of Divalent Zn, Cd, and Their Adducts: Single Crystal X-Ray Structure Redetermination of (Diiodo) (Tetraethylthiuramdisulfide)mercury(II), [Hg(tetds)I2]. In: Phosphorus Sulfur and Silicon and the Related Elements, vol. 184 (8) pp. 2020 - 2033. Taylor & francis, 2009.
The current article describes the TG and DT analyses of divalent Zn, Cd, and Hg dithiocarbamato (dtc) complexes and their adducts (dchdtc = N,N-dicyclohexyldithiocarbamate anion, 4-mpzdtc = 4-methylpiperazinecarbodithioato anion, padtc = N,N'-(iminodiethylene)bisphthalimidedithiocarbamate anion, pipdtc = piperidinecarbodithioate anion, 1,10-phen = 1,10-phenanthroline, and 2,2'-bipy = 2,2'-bipyridine) along with the structural reinvestigation of [Hg(tetds)I2], where tetds = tetraethylthiuramdisulfide. In the case of Zn(II) and Cd(II) dithiocarbamates and their nitrogenous adducts, thermal decomposition of the nitrogenous bases is followed by the decay of dithiocarbamate leading to the formation of ZnS or CdS as residue. The interaction of iodine with [Hg(dedtc)2] in CHCl3 results in the oxidation of diethyldithiocarbamate leading to the formation of [Hg(tetds)I2], and the structure was redetermined because the earlier determination was by a Polaroid crystallographic technique with a higher R value. The S-Hg-I bond angles [105.09(3); 105.59(3); 109.26(3), and 100.99(3)] indicate the near tetrahedral environment around the metal ion. 1H and 13C NMR spectra of the complex were analyzed. Whether the product formed upon oxidation is a disulfide or an iodo-substituted product, in the present investigation, is clearly decided by the bulkiness of the substituent attached to the nitrogen. Interestingly, the steric influence is a deciding factor only in the case of mercury compounds and the dithiocarbamates involving Zn, Cd forms of the disulfide complexes.
URL: http://www.informaworld.com/smpp/content~db=all?content=10.1080/10426500802418016
DOI: 10.1080/10426500802418016
Subject Dithiocarbamate
single crystal X-ray structure
thermal studies

Icona documento 1) Download Document PDF

Icona documento Open access Icona documento Restricted Icona documento Private


Per ulteriori informazioni, contattare: Librarian http://puma.isti.cnr.it

Valid HTML 4.0 Transitional