THERMAL, MAGNETIC, SPECTROSCOPIC AND SOLUBILITY BEHAVIOR OF NICKEL MYRISTATE

The physicochemical characteristics of nickel soap (myristate) were in vestigated in the solid state and solutions using TGA, magnetic, spect roscopic (IR and visible spectra) and solubility measurements. The the rmogravimetric results showed that the decomposition is a two stage ze ro order process. The energies of activation for two stage decompositi on process below 473-degrees-K and above 573-degrees-K are 10.7 and 10 .9 kCal mol-1, respectively. The magnetic and spectrophotometric measu rements confirmed that nickel myristate has octahedral geometry and th e metal-to-oxygen bonds in nickel myristate are partly covalent in nat ure. The infrared spectra confirmed that the fatty acid exists with di meric structure through hydrogen bonding between two molecules of fatt y acids whereas metal-to-oxygen bonds in nickel myristate has an ionic character. The solubility reveals that the Krafft point for nickel so ap in organic solvents lies within a narrow range of 311-316-degrees-K and the CMC were found to be higher in benzene than in chloroform and methanol.