{"title":"重铬酸吡啶在非水介质中氧化转化扁桃酸的动力学及机理研究","authors":"R. Sharma, Sagar Singh Thakur, B. K. Dangarh","doi":"10.22147/JUSPS-B/300703","DOIUrl":null,"url":null,"abstract":"The alpha–hydroxy acids (AHA) are naturally occurring organic acid. The oxidation of mandelic acid by pyridiniumdichromate has been studied spectrophotometrically in presence of p-toluenesulphonic acid (PTSA) in dimethylsulphoxide (DMSO) as a solvent. The rate of reaction decrease & with an increase in polarity of solvent indicating an ion-dipole interaction in the slow step. The reaction exhibit no primary kinetic isotope effect. The activation parameters have been evaluated.","PeriodicalId":283969,"journal":{"name":"Journal of Ultra Scientist of Physical Sciences Section B","volume":"29 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Oxidative Transformation of Mandelic acid by Pyridiniumdichromate in non-aqueous medium kinetic and mechanistic study\",\"authors\":\"R. Sharma, Sagar Singh Thakur, B. K. Dangarh\",\"doi\":\"10.22147/JUSPS-B/300703\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The alpha–hydroxy acids (AHA) are naturally occurring organic acid. The oxidation of mandelic acid by pyridiniumdichromate has been studied spectrophotometrically in presence of p-toluenesulphonic acid (PTSA) in dimethylsulphoxide (DMSO) as a solvent. The rate of reaction decrease & with an increase in polarity of solvent indicating an ion-dipole interaction in the slow step. The reaction exhibit no primary kinetic isotope effect. The activation parameters have been evaluated.\",\"PeriodicalId\":283969,\"journal\":{\"name\":\"Journal of Ultra Scientist of Physical Sciences Section B\",\"volume\":\"29 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2018-07-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Ultra Scientist of Physical Sciences Section B\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.22147/JUSPS-B/300703\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Ultra Scientist of Physical Sciences Section B","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.22147/JUSPS-B/300703","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Oxidative Transformation of Mandelic acid by Pyridiniumdichromate in non-aqueous medium kinetic and mechanistic study
The alpha–hydroxy acids (AHA) are naturally occurring organic acid. The oxidation of mandelic acid by pyridiniumdichromate has been studied spectrophotometrically in presence of p-toluenesulphonic acid (PTSA) in dimethylsulphoxide (DMSO) as a solvent. The rate of reaction decrease & with an increase in polarity of solvent indicating an ion-dipole interaction in the slow step. The reaction exhibit no primary kinetic isotope effect. The activation parameters have been evaluated.
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