Determination of the Second Order Rate Constants, Activation Energy, Entropy and Enthalpy of Activation Changes
کد مقاله : 1204-PHYSCHEM20
1وجیهه حسنی، 2بیتا شفاعتیان *
1دانشجوی کارشناسی ارشد دانشگاه دامغان
2هیات علمی
چکیده مقاله:
New complexes of organoplatinum(II) and organoplatinum(IV) containing dinitrogen chelated ligand were synthesized and characterized by FT-IR, 1H NMR, UV/Vis, elemental analysis and conductometry. The platinum complexes have been found to possess 1:1 metal to ligand stoichiometry and the molar conductance data revealed that the metal complexes were non-electrolytes. The platinum(II) and platinum(IV) complexes exhibited square planar and octahedral coordination geometry, respectively. Moreover, oxidative addition reaction of iodomethane with platinum(II) complex in 15, 20, 25, 30 and 35 ºC was studied and calculation of rate constants was done using curve fitting with Microsoft Excell solver. Moreover, activation energy, entropy and enthalpy of activationwere calculated using Arrhenius and Eyring plot, respectively. From the obtained data, SN2 mechanism was suggested for the oxidative addition reaction.
کلیدواژه ها:
Kinetic; Oxidative Addition; Organoplatinum;Chelate
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