Synthesis and Spectral Studies of Some Lanthanide Complexes with Tridentate Thiosemicarbazone Ligand

Lanthanide complexes of the type i(Cl)(2)Ln(L)(H(2)O)(4)] and [(Cl)Ln(L)(2)(H(2)O)(3)] [where Ln= Nd(III), Gd(III), Sm(III) & Y(III), L= Schiff base ligand; salicylidene-thiosemicarbazide (stscH)] were synthesized and characterized by various physicochemical techniques. The complexes were found to be coloured solid and were highly soluble in methanol, ethanol, DMF and DMSO. These complexes have been characterized by elemental (Ln, C, H, N, S & Cl) analysis and spectral (IR, (1)H- and (13)C- NMR) data, whereas the structure of the complexes has been tentatively determined by FAB-MS spectral studies. Xray powder diffraction of one of the complex was recorded on Rigaku Model D/Max-2200 PC using Cu-K alpha 1, radiation (lambda = 1.5406 angstrom). The crystallite size of the complex [(Cl)(2)Gd(L)(H(2)O)(4)] is 193.04 angstrom