Thermal and spectral studies of 3-N-methyl-morpholino-4-amino-5-mercapto-1,2,4-triazole and 3-N-methyl-piperidino-4-amino-5-mercapto-1,2,4-triazole complexes of cobalt(II), nickel(II) and copper(II)

Novel complexes obtained by 3-N-methyl-morpholino-4-amino-5-mereapto-1,2,4- triazole and 3-N-methyl-piperidino-4-amino-5-mercapto-1,2,4-triazole with C o(II), Ni(II) and Cu(II) have been synthesized and characterized by element al analysis, electronic, IR, ESR and TG studies. TG studies of these comple xes showed that thermal degradation proceeds in two steps. Kinetic and ther modynamic parameters were computed from the thermal decomposition data. The activation energy of both the thermal degradation steps is in the 0.22-44. 67 kJ mol(-1) range. Based on the spectral and TG studies, an octahedral ge ometry can be proposed for the above complexes. (C) 1999 Elsevier Science B .V. All rights reserved.