Synthesis and physico-chemical studies on neodymium(III) and samarium (III) derivatives with mercapto triazoles

The reaction of NdCl₃, and SmCl, with 5-alkyl-4-amino-S-triazole-5-thiols, LH (alkyl = methyl/ethyl) and also with its Schiff bases L'H, I''H derived by the condensation of LH, with benzaldehyde, acetophenone and salicyaldehyde or u-hydroxyacetophenone have been carried out in aqueous ethanol. The products of types [M(L₃)] 2H₂O, (M(L')₂Cl] and [M(L'')Cl(H₂O₂)] have been isolated and characterized by elemental analyses, electrical conductance, magnetic moment and spectral studies. The thermal behaviour of Nd(III) and Sm(III) complexes having only one series of ligand (L'H) and (L''H) were investigated by TG, DIG and DSC techniques. Kinetic parameters were determined by graphical method of Coats and Redfern. The heat of reaction for different decomposition steps was calculated from DSC carves.