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Kinetics and Mechanism of ZnCl2 Catalyzed Oxidation of Organic Sulfides by Permanganate in Non-Aqueous Medium

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1TitleTitle of DocumentKinetics and Mechanism of ZnCl2 Catalyzed Oxidation of Organic Sulfides by Permanganate in Non-Aqueous Medium
2CreatorAuthor's name, affiliation, country K. P. SRIVASTAVA* and SANJAY KUMAR RAI
P.G. Department of Chemistry, Ganga Singh College, Jai Prakash University, Chapra-841 301, Bihar, India
3SubjectDicipline(s) Chemical Science
3SubjectKeywords Thioanisoles, Permanganate, Acid catalysedoxidation, LUMO, HOMO
4DescriptionAbstract The rates of zinc chloride (Lewis acid) catalysed oxidation of thioanisole and several para-substituted thioanisoles by permanganate have been studied in anhydrous acetone solutions. The kinetic rate law obtained indicates that a complex between permanganate and the Lewis acid (ZnCl2) is formed before oxidation of the sulfur-containing compounds occurs. The function of the zinc chloride is to enhance the reactivity of permanganate. A Hammett ρ value of -1.09 ±0.05 is obtained for the oxidation of sulfides at 23.0 oC. A negative ? value means that the sulfur is electron deficient in the transition state. Values for the HOMO energies of sulfides and the LUMO energies for permanganate ion and the permanganate-zinc chloride complex have been calculated. The results indicate that electron donating substituents on the ring increase the rate of the reaction and electron withdrawing groups slow down the reaction.
5PublishersOrganizing agency, location WWW Publications, India
6Contributor Sponsor(s) -
7DateDate (YYYY-MM-DD) -
8TypeStatus & genre Peer-reviewed Article
8TypeType
9FormateFile Formate PDF
10IdentifierUniform Resource Identifier Click Here
10IdentifierDigital Object Identifier
11SourceJournal/conference title; vol., no. (Year)Chemical Science Transactions, Volume  3 , Number  (3), (2014)
12LanuguageEnglish=en en
13RelationSupp.files
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Chemical Science Transactions | Chem Sci Trans | CST | Online Chemistry Journal | Open Access
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