Synthesis and spectral studies on nitrogen donor adducts of bis(4-ethylpiperazinecarbodithioato-S,S′)M(II) (M = Zn, Cd) and use of adducts of cadmium dithiocarbamate for the preparation of cadmium sulfide.

Valarmathi, Panneerselvam; Thirumaran, Subbiah; Ragi, Patinharayil; Ciattini, Samuele

[M(4-epzdtc)2(py)], [M(4-epzdtc)2(1,10-phen)], and [M(4-epzdtc)2(2,2′-bipy)] (where M = Zn(II), Cd(II); 4-epzdtc− = 4-ethylpiperazinecarbodithioate) were synthesized and characterized by IR and NMR (1H, 13C, HSQC and HMBC) spectra. A single-crystal X-ray analysis was carried out for [Zn(4-epzdtc)2(py)]. The N13CS2 chemical shifts of [M(4-epzdtc)2] and its adducts follow the order: [M(4-epzdtc)2] (ca 202 ppm) < [M(4-epzdtc)2(py)] (ca 204 ppm) < [M(4-epzdtc)2(N,N)] (N,N = 1,10-phen, 2,2′-bipy) (ca 206 ppm), due to the change in coordination number. Single-crystal X-ray structural analysis of [Zn(4-epzdtc)2(py)] showed that zinc is five-coordinate with four sulfurs from dithiocarbamate and one nitrogen from pyridine. This complex adopts a geometry intermediate between the tetragonal pyramid (C4v) and trigonal bipyramid (D3h). [Cd(4-epzdtc)2] and its adducts were used as single source precursors for preparation of CdS. The as-prepared CdS was characterized by powder X-ray diffraction, UV-Vis absorption, and fluorescence spectroscopy. The UV-Vis absorption spectra of CdS particles indicate a blue shift in the absorption spectra due to the quantum size effect.

CHEMICAL synthesis; SPECTRUM analysis; NITROGEN; PIPERAZINE; DITHIOCARBAMATES; CADMIUM sulfide synthesis; CADMIUM compounds

Journal of Coordination Chemistry, 2011, Vol 64, Issue 23, p4157

0095-8972

Academic Journal

10.1080/00958972.2011.636425