Thermo-kinetic and spectral studies of niobium(V) complexes with 3-substituted-4-amino-5-mercapto-1, 2, 4-triazole Schiff bases

Abstract

Metal complexes of niobium(V) with 3-substituted-4-amino-5-mercapto 1,2,4-triazole Schiff bases have been synthesized in dry chloroform under a nitrogen atmosphere. They were characterized by elemental analysis, molar conductance, electronic, infrared, 1H-NMR spectroscopy and thermal studies. Parameters, such as energy of activation (Ea), enthalpy (?H#), entropy (?S#) and Gibbs energy (?G#), were computed from the thermal decomposition data. Based on the spectral and thermal studies, a coordination number of seven is proposed.