Determination of the Second Order Rate Constants, Activation Energy, Entropy and Enthalpy of Activation Changes

New complexes of organoplatinum(II) and organoplatinum(IV) containing dinitrogen chelated ligandweresynthesized and characterized by FT-IR, 1H NMR, UV/Vis, elemental analysis and conductometry.The platinumcomplexes have been found to possess 1:1 metal to ligand stoichiometry and the molarconductance data revealed thatthe metal complexes were non-electrolytes. The platinum(II) and platinum(IV) complexes exhibited square planar andoctahedral coordination geometry, respectively. Moreover, oxidative addition reaction of iodomethane withplatinum(II) complex in 15, 20, 25, 30 and 35 ºC was studied and calculation of rate constants was done using curvefitting with Microsoft Excell solver. Moreover, activation energy, entropy and enthalpy of activationwere calculatedusing Arrhenius and Eyring plot, respectively. From the obtained data, SN2 mechanism was suggested for the oxidativeaddition reaction.

کلیدواژه ها:

Kinetic ، Oxidative Addition ، Organoplatinum ، Chelate