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Title: Electrochemical oxidation of 6-thioxanthine at pyrolytic graphite electrode
Authors: Goyal, Rajendra N
Singh, Udai P
Abdullah, Adil A
Issue Date: May-2004
Publisher: NISCAIR-CSIR, India
IPC Code: Int. Cl.7 C07B 33/00
Abstract: 6-Thioxanthine has been studied in phosphate buffers of pH 1.2 -11.0 using linear and cyclic sweep voltammetry, coulometry, controlled potential electrolysis and spectral studies. Two well -defined oxidation peaks, Ia (1e,1H+, pH range 1.2- 6.0) and IIa (8e, 8H+, pH range 1.2-11.0) , are observed. A reduction peak, IIIc, is noticed in the reverse sweep. Kinetic studies indicate that the decay of the UV- absorbing intermediate is a first order reaction. The studies show that in acidic medium, thio group of 6- thioxanthine exists as S-H, whereas in neutral and basic medium thio group is in the form of C=S. The products of electrooxidation have been characterized and a tentative EC mechanism has been suggested for the oxidation of 6-thioxanthine.
Page(s): 1044-1050
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.43A(05) [May 2004]

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