重铬酸乙二胺在AcOH-H2O介质中氧化转化取代Mandelic酸的动力学研究

IF 0.3 Q4 CHEMISTRY, MULTIDISCIPLINARY

Oriental Journal Of Chemistry Pub Date : 2023-08-30 DOI:10.13005/ojc/390427

Priyanka Kharetiya, D. Panday

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引用次数: 0

摘要

研究了在醋酸水溶液中用重铬酸乙二铵(EDDC)氧化扁桃酸生成相应的氧酸。对[EDDC]的反应为一级反应，对曼德尔酸和[H+]的反应小于二级反应。α-氘醛酸在298K时的氧化表现为一次动力学同位素效应(kH/kD = 6.01)。发现该反应是由[H+]离子催化的。本文报道并讨论了氧化反应的各种热力学参数以及等速关系的正确性。当反应常数ρ为负时，反应与Hammett σ值有很强的相关性。根据埃克斯纳图，所有选定的曼德尔酸都通过相同的过程被氧化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The Oxidative Transformation of Substituted Mandelic acids by Ethylenediammonium Dichromate in AcOH-H2 O medium: (A Kinetic Study)

The oxidation of Mandelic Acids to the corresponding oxoacids with ethylenediammonium dichromate (EDDC) in aqueous acetic acid has been studied. The reaction is first order with respect to [EDDC] and less than two order observed for Mandelic acids and [H+]. The oxidation of α-deuteriomandelic acid shows the presence of a primary kinetic isotope effect (kH/kD = 6.01 at 298K). The reaction has been found to be catalyzed by [H+] ions. The various thermodynamic parameters for the oxidation have been reported and discussed along with the validity of the isokinetic relationship. With a negative reaction constant (ρ), the reaction displayed a strong correlation with the Hammett σ values. All of the chosen Mandelic acids are oxidised by the same process, according to the Exner plot.

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来源期刊

Oriental Journal Of Chemistry CHEMISTRY, MULTIDISCIPLINARY-

自引率

20.00%

发文量

172

期刊介绍： Oriental Journal of Chemistry was started in 1985 with the aim to promote chemistry research. The journal consists of articles which are rigorously peer-reviewed. The journal was indexed in Emerging Science citation index in 2016. The Editorial board member consists of eminent international scientist in all fields of Chemistry. Details of each member and their contact information is mentioned in website. The journal has thorough ethics policies and uses plagiarism detection software(ithenticate) to screen each submission. The journal has recently partnered with publons as a part of making our reviews more transparent. The journal has recently incorporated PlumX for article level matrix. The journal is promoting research on all social and academic platforms mentioned in PlumX guidelines. The journal uses google maps to improve on the geographical distribution of Editorial board members as well as authors.