Synthesis, spectral and thermal studies of some organotin(IV) derivatives of 5-amino-3H-1,3,4-thiadiazole-2-thione
作者:Mala Nath、Sulaxna、Xueqing Song、George Eng
DOI:10.1016/j.saa.2005.07.009
日期:2006.5
Some tri- and diorganotin(IV) compounds of the general formula, RnSnL4-n (where n = 2, R = Me, n-Bu and Ph; n = 3, R = Me, n-Bu, n-Pr and Ph; HL = 5-amino-3H-1,3,4-thiadiazole-2-thione) have been synthesized by the reaction of RnSnCl4-n, (where n = 2 or 3, R = Me, n-Bu, n-Pr and Ph) and the sodium salt of the ligand. Oct(2)SnL(2) was obtained by the reaction of Oct(2)SnO with HL in a 1:2 molar ratio under azeotropic removal of water. The bonding and coordination behavior in these derivatives are discussed on the basis of IR, Far-IR, multinuclear (H-1, C-13 and Sn-119) NMR and Sn-119 Mossbauer spectroscopic studies. These investigations suggest that in all the compounds the ligand acts as monoanionic bidentate coordinating through ring N(3) and exocyclic S. Thermal studies of five compounds, viz., Ph3SnL, Me2SnL2, n-Bu2SnL2, Oct(2)SnL(2) and Ph2SnL2 have been carried out in the temperature range 25-1000 degrees C using TG, DTG and DTA techniques under an atmosphere of dry nitrogen. (c) 2005 Elsevier B.V. All rights reserved.