Kinetics and Mechanisms of Oxidation Of 1-Octene and Heptanal by Crown Ether-Solubilized Potassium Permanganate in Non-Aqueous Solvents

Hikmat S. Hilal's picture
Journal Title, Volume, Page: 
Transition Metal Chemistry, Volume 27, Number 2, March 2002 , pp. 223-227(5)
Year of Publication: 
2002
Authors: 
Hilal H.S
Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine
Current Affiliation: 
Department of Chemistry, An-Najah N. University, PO Box 7, Nablus, West Bank, Palestine
Al-Subu M.M
Jondi W.J
Dado S.A
Preferred Abstract (Original): 

The kinetics of oxidation of 1-octene and heptanal by 18-crown-6-ether-solubilized KMnO_4 in benzene and CH_2Cl_2 have been investigated. In benzene, the oxidation of 1-octene is first order with respect to the oxidant and zero order with respect to the substrate, whereas in CH_2Cl_2 the reaction is first order with respect to both substrate and oxidant. The reaction of heptanal followed different kinetics being first order with respect to both substrate and oxidant, regardless of whether benzene or CH_2Cl_2 was employed as the solvent. The values of activation energy E_a, standard enthalpy DeltaH^*, standard entropy change DeltaS^*, and standard free energy DeltaG^*, for the reaction, are reported. Mechanistic pathways for the studied reactions are also proposed.