{"title":"吡啶-氯铬酸盐在dmf -水介质中氧化转化某些氨基酸的动力学和机理研究","authors":"S. Rathor, B. K. Dangarh","doi":"10.9790/5736-1001022023","DOIUrl":null,"url":null,"abstract":"Oxidation of L-isoleucine and L-valine by PCC was studied in the presence of perchloric acid in DMFH2O medium at 400C. The kinetics of the reaction was followed spectrophotometrically at λ max = 354 nm. The reaction is unit dependence on each of PCC, [H + ] and [substrate]. Michaelis-Menten type kinetics was observed with different amino acid. The reactions were studied at different temperature [25, 30, 35, 40, 45,500C] and activation parameters were computed. The effect of dielectric constant of the medium on the rate was studied. A mechanism consistent with the observed results has been proposed.","PeriodicalId":14488,"journal":{"name":"IOSR Journal of Applied Chemistry","volume":"15 1","pages":"20-23"},"PeriodicalIF":0.0000,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Kinetic and Mechanistic study of Oxidative Transformation of Some Amino acid by Pyridiniumchlorochromate in DMF-Water Medium\",\"authors\":\"S. Rathor, B. K. Dangarh\",\"doi\":\"10.9790/5736-1001022023\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Oxidation of L-isoleucine and L-valine by PCC was studied in the presence of perchloric acid in DMFH2O medium at 400C. The kinetics of the reaction was followed spectrophotometrically at λ max = 354 nm. The reaction is unit dependence on each of PCC, [H + ] and [substrate]. Michaelis-Menten type kinetics was observed with different amino acid. The reactions were studied at different temperature [25, 30, 35, 40, 45,500C] and activation parameters were computed. The effect of dielectric constant of the medium on the rate was studied. A mechanism consistent with the observed results has been proposed.\",\"PeriodicalId\":14488,\"journal\":{\"name\":\"IOSR Journal of Applied Chemistry\",\"volume\":\"15 1\",\"pages\":\"20-23\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IOSR Journal of Applied Chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.9790/5736-1001022023\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IOSR Journal of Applied Chemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.9790/5736-1001022023","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
研究了在高氯酸存在下，PCC在DMFH2O介质中400℃氧化l -异亮氨酸和l -缬氨酸。在λ max = 354nm处用分光光度法测定了反应动力学。该反应对PCC、[H +]和[底物]均有单位依赖性。观察了不同氨基酸的Michaelis-Menten型动力学。研究了不同温度[25、30、35、40、45,500℃]下的反应，并计算了活化参数。研究了介质介电常数对速率的影响。提出了一种与观测结果一致的机理。
Kinetic and Mechanistic study of Oxidative Transformation of Some Amino acid by Pyridiniumchlorochromate in DMF-Water Medium
Oxidation of L-isoleucine and L-valine by PCC was studied in the presence of perchloric acid in DMFH2O medium at 400C. The kinetics of the reaction was followed spectrophotometrically at λ max = 354 nm. The reaction is unit dependence on each of PCC, [H + ] and [substrate]. Michaelis-Menten type kinetics was observed with different amino acid. The reactions were studied at different temperature [25, 30, 35, 40, 45,500C] and activation parameters were computed. The effect of dielectric constant of the medium on the rate was studied. A mechanism consistent with the observed results has been proposed.
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