ELECTROREDUCTION OF 3,4-DIPHENYL-1,2,5-THIADIAZOLE-1,1-DIOXIDE IN ACETONITRILE SOLUTION AND REACTIONS WITH PROTON DONORS

被引：14

作者：

MIRIFICO, MV

CARAM, JA

VASINI, EJ

机构：

[1] Instituto de investigaciones Fisicoquimicas Teoricas y Aplicadas (INIFTA), Facultad de Ciencias Exactas, Universidad Nacional de la Plata, 1900 La Plata, Casilla de Correo 16

来源：

ELECTROCHIMICA ACTA | 1991年 / 36卷 / 01期

关键词：

ELECTROREDUCTION; THIADIAZOLE DERIVATIVES; 3,4-DIPHENYL-1,2,5-THIADIAZOLE-1,1-DIOXIDE; CYCLIC VOLTAMMETRY;

D O I：

10.1016/0013-4686(91)85197-F

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electroreduction of 3,4-diphenyl-1,2,5-thiadiazole-1,1-dioxide (T) has been investigated in acetonitrile solutions containing LiClO4 as the supporting electrolyte by cyclic voltammetry and bulk electrolysis techniques. T is reduced successively to T.- and to T2- at ca -0.8 V vs Ag/Ag+. The potential difference between the two charge transfers reactions is -0.062 V. The presence of Li+ ion stabilizes the T2- dianion. The addition of trifluoroacetic or benzoic acid in sufficient concentration allows observation of the electroreduction of TH+. The basic equilibrium constant of T to form TH+, estimated from peak potential displacement, is 8 x 10(13). The product of voltammetric T electroreduction in the presence of proton donors is the corresponding thiadiazoline (TH2).

引用

页码：167 / 171

页数：5

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