Thermal Analysis of Fe(II), Fe(III), Co(II), Ni(II) and Cu(II) Chelates of 2'-Hydroxy-4-Methoxy-5'-Methylchalkone Oxime

Chemistry Department, Nagpur University Campus, Nagpur-440 010 Manuscript received 27 November 1979, accepted 20 December 1979 The thermal analysis of Fe(II), Fe(III), Co(II), Ni(II) and Cu(II) chelates of 2'- hydroxy-4-methoxy-5'-methylchalkone oxime (HMMCO) was studied by TG and DTA techniques. All chelates show somewhat similar TG and DTA profiles when heated in an atmosphere of air. A sharp exothermic peak in the range 150-200° was observed preceded to endothermic peak for dehydration of metal chelate. This sharp exothermic peak may be caused due to the transition from unstable state to stable state of the chelate. Broad exothermic peak was observed above 300°, corresponding to rapid mass-loss in TG curve, which may be due to oxidation-reduction reactions. A relative thermal stability of metal chelates is reported