MICROWAVE ASSISTED SYNTHESIS, CHARACTERIZATION AND THERMAL DEGRADATION STUDIES OF COORDINATION POLYMERS OF 1-(2,4-DIHYDROXY-5- (1-(HYDROXYAMINO)ETHYL)-3-NITROPHENYL) ETHANONE OXIME

Microwave heating has received considerable attention as a powerful synthetic tool for metal complexes in many fields of Inorganic chemistry and material Science. Since, the 1990s numerous metal complexes have been synthesized using the microwave technique. However, only few of studies have been discussed on such synthesis. In this communication, we focus on microwave assisted synthesis of ligand (DHNO) and its coordination polymers. The dioxime ligand H2L, is synthesized by the reaction of 3-nitro 4, 6-diacetylresorcinol with hydroxylamine hydrochloride in molar ratio 1:2. The ligand is characterized by using IR, 1H NMR and mass spectroscopy. A detail thermal study of Mn(II), Co(II), Ni(II), Cu(II), Zn(II) coordination polymers with1-(2,4-dihydroxy- 5-(1-(hydroxyamino)ethyl)-3-nitrophenyl)ethanone oxime is being reported. Freeman-Carroll and Sharp-wentworth methods have been used to calculate activation energy and thermal stability of these polymers. Kinetic parameters have been calculated using the data of freeman-carroll-method. Elemental analysis, UV-visible, Thermal analysis, magnetic susceptibility, as well as electrical conductivity and infrared spectral measurements are used to elucidate the structures of the coordination polymers. Thermo gravimetric analysis (TGA) is used as tool to detect the water molecules associated with the coordination polymers are either coordinated or crystalline.