%0 Journal Article %T New Nickel Metal Complex towards Biomimetic Catecholase Enzyme Oxidation: Synthesis and Kinetics Studies %J - %D 2018 %X Pyrano[2,3-c]pyrazole ligand and their transition metal complex with nickel (NiIIMPC) were synthesized and characterization by elemental analyses, magnetic susceptibility, FT IR, UV-Vis, and mass spectroscopy. Complex have been investigated as functional models for catechol oxidase activity by using a catechol as a model substrate. According to the kinetic measurement results, the rate of catechol oxidation follows first order kinetics. Nickel complex has been used in homogenous oxidation of catechol in presence of a green oxidant H2O2. kinetic parameters were obtained Vmax= 2.698กม10-3MS-1, Km = 7.878M, kcat= 4.496กม10-2S-1 and kcat/Km = 0.5707 M-1S-1 %K Pyrano[2 %K 3-c]Pyrazole %K Nickel %K Oxidation %K Catecholase %U http://www.sciencepublishinggroup.com/journal/paperinfo?journalid=244&doi=10.11648/j.bmb.20180301.11