Spectral and Kinetic Studies of Thermal Decomposition of Ni-II hexanoate Complex Ni-2(cap)(4)

Nickel(II) hexanoate complex, Ni-2(cap)(4), (where cap is the hexanoate anion = CH3(CH2)(4)COO-) was prepared and discussed using elemental analysis, infrared spectra, thermogravimetric analysis (TGA), differential thermal analysis (DTA), UV-vis spectra, and X-ray powder diffraction (XRD) studies. Using the non-isothermal, Horowitz-Metzger (HM) and Coats-Redfern methods, and the kinetic parameters for the non-isothermal degradation of the respective complex was calculated by using TG data. The infrared data are in agreement with coordination through carboxylate-to-metal, with cap acting as a bridging bidentate ligand. Thermogravimetric analysis of the Ni-II complex shows that the first degradation step is associated with the release of terminal methyl groups followed by the decomposition of the hexanoate molecules to form nickel carbonate salt and then give nickel(II) oxide as residual product. {[}Mohamed Y. El-Sayed and Samy M. El-Megharbel Spectral And Kinetic Studies of Thermal Decomposition of Ni-II Hexanoate Complex Ni-2(Cap)(4). Life Sci J 2012;9(3):1143-1151]. (ISSN: 1097-8135). http://www.lifesciencesite.com. 159