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Kinetic, Mechanistic and Spectrophotometric Study of Micelle Effects on the Oxidation of Thiourea by Quinolinium Dichromate in Perchloric Acid Medium

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1TitleTitle of DocumentKinetic, Mechanistic and Spectrophotometric Study of Micelle Effects on the Oxidation of Thiourea by Quinolinium Dichromate in Perchloric Acid Medium
2CreatorAuthor's name, affiliation, country D. SURYA KALA, ASIF K. RAMA KRISHNA M.K.CHAKRAVARTHY and P.V. SUBBA RAO
Department of Chemistry, Institute of Science, GITAM University, Visakhapatnam, India
Department of Chemistry, ANITS Engineering College, Visakhapatnam, India
Department of Chemistry, Gayatri Vidya Parishad, Visakhapatnam, India
3SubjectDicipline(s) Chemical Science
3SubjectKeywords Monomeric quinolinium dichromate, QMC, Oxidation, Effect of anionic and neutral (TX-100) micelle
4DescriptionAbstract The kinetic investigation of oxidation of thiourea by quinolinium dichromate (QDC) in perchloric acid medium at constant ionic strength was studied spectrophotometrically at 440 nm. A stoichiometric ratio of 3:1 with thiourea versus QDC was observed. The reaction was first order with respect to thiourea, monomeric QDC (QMC) and HClO4. Induced polymerization of acrylonitrile was observed. The mechanism involved the attack of protonated monomeric QDC (QMC) on the substrate in the rate determining step forming the products. Addition of Mn(II) has no effect on the reaction rate. The effect of anionic micelle (SDS) and neutral micelle (TX-100) on the system was studied using Berezin’s kinetic model and observed a partial inhibitory effect on the rate of the reaction. The thermodynamic parameters like ΔEa ΔS and ΔG have been calculated and possible mechanism was proposed.
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  2 , Number  (4), (2013)
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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