Kinetics and mechanisms of oxidation of 1-octene and heptanal by crown ether-solubilized potassium permanganate in non-aqueous solvents

• Published in: Transition metal chemistry (Weinheim) 2002-03, Vol.27 (2), p.223
• Main Authors: Al-subu, Mohammad M, Jondi, Waheed J, Dado, Saida A, Hilal, Hikmat S
• Format: Article
• Language: English
• ISSN: 0340-4285; 1572-901X
• DOI: 10.1023/A:1013983411977

The kinetics of oxidation of 1-octene and heptanal by 18-crown-6-ether-solubilized KMnO^sub 4^ in benzene and CH^sub 2^Cl^sub 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^sub 2^Cl^sub 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^sub 2^Cl^sub 2^ was employed as the solvent. The values of activation energy E^sub a^, standard enthalpy ΔH^sup *^, standard entropy change ΔS^sup *^, and standard free energy ΔG^sup *^, for the reaction, are reported. Mechanistic pathways for the studied reactions are also proposed.[PUBLICATION ABSTRACT]