%0 Journal Article
%T Synthesis, Spectral, Thermal, Electrochemical, and Biocidal Activity of Tolyl/Benzyl Dithiocarbonates of Zinc(II)
%A Nidhi Kalgotra
%A Bhawana Gupta
%A Savit Andotra
%A Sandeep Kumar
%A Sushil Kumar Pandey
%J International Journal of Inorganic Chemistry
%D 2013
%I Hindawi Publishing Corporation
%R 10.1155/2013/135496
%X Tolyl/benzyl dithiocarbonates of zinc(II) [( CH3C6H4 and C6H5CH2OCS2)2Zn] have been synthesized in 1£¿:£¿2 molar ratio by the reaction of zinc chloride, ZnCl2, with sodium salts of tolyl/benzyl dithiocarbonates CS2Na, in aqueous medium. These complexes were further reacted with nitrogen and phosphorous donor ligands to obtain donor stabilized complex of the type [[( CH3C6H4 and C6H5CH2)OCS2]2Zn.nL], (L = Bipy, Phen for and PPh3, Py for ). These complexes were characterised by elemental analysis, mass, IR, and NMR (1H, 13C, and 31P) spectroscopies. The thermal analysis (TGA/DTA), cyclic voltammetry, and SEM have also been done. Distorted tetrahedral and octahedral geometries around the Zn(II) metal are proposed. These complexes have depicted potential antibacterial and antifungal activity. 1. Introduction Dithiocarbonates are sulfur and oxygen containing ligands which display rich and varied coordination chemistry with a wide range of transition and main group metals [1]. Transition metal dithiolate complexes exhibited versatile and interesting chemistry that have been studied extensively during the last decades [2]. Xanthates can form bidentate, monodentate, or network solids, showing a wide range of coordination behaviour [3¨C6]. More recent applications of xanthates and other thiocompounds are in the production of nanoparticles of metal sulphides [7, 8] and NLO properties [9, 10]. Metal xanthates are extensively used as corrosion inhibitors [11] and agricultural reagents [12, 13]. Dithiocarbonates have also found important use in medicine as antitumor agents [14, 15] and for treating Alzheimer¡¯s disease [16]. Sodium and potassium ethylxanthate have antidotal effects in acute mercurial poisoning [17] and recently as coadjuvant in AIDS treatment [18]. The ¨COCS2 group of xanthates makes them more reactive towards various metals [19]. Zinc is an essential element and plays an important role in biochemical processes [20]. Ability of zinc(II) to coordinate with strategic ligand can lead to a structural and functional model for zinc metalloenzymes [21]. Zinc complexes of 1, 1-dithiolato ligands and their adducts with neutral ligands are known but not all dithiolate ligands have received the same attention [22]. Surprisingly, in spite of years of chemistry of the extensive and long-term use of alkyl xanthates as ligands [23¨C28], structural and spectroscopic characterizations have been rather limited with regard to the aryl xanthates [29]. Fackler et al. [29], however, reported the synthesis of thallium aryl xanthates which in turn were used for the metathetical
%U http://www.hindawi.com/journals/ijic/2013/135496/