REDUCTION KINETICS OF 2,3-DIMETHOXY-5-METHYL-1,4-BENZOQUINONE BY ASCORBIC-ACID IN ACID-SOLUTION

被引：5

作者：

CANO, MCS

SANCHEZ, JV

机构：

[1] Laboratory of Physical Chemistry, Universidad de Murcia

来源：

JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2 | 1993年 / 03期

关键词：

D O I：

10.1039/p29930000427

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The mechanism of the oxidation of ascorbic acid by 2,3-dimethoxy-5-methyl-1,4-benzoquinone was studied as a function of pH, ionic strength and temperature in aqueous buffer solutions, using dc polarography and UV-VIS spectrophotometry. The study was performed at pH values 3.0-6.2 at which the quinone is stable. From the experimental results, a mechanism for oxidation of the ascorbic acid which involves several steps with the participation of AH. and QH. radicals as intermediate species, has been proposed.

引用

页码：427 / 430

页数：4

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