Vol. 24 No. 2 (2014)
Artículos de Investigación

Electrochemical studies of certain novel N<sup>|</sup>-(benzenesulfonyl)-3-methyl-4-(2<sup>|</sup>-substituted-aryl hydrazono)- pyrazolin-5-ones

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  • Peddi Srinivasan,
  • A. Raghavendra Guru Prasad,
  • Golla Narayana Swamy,
  • L. K. Rao Ravindranath
Peddi Srinivasan
Sri Krishnadevaraya University, Anantapur, A.P., India,
A. Raghavendra Guru Prasad
ICFAI Foundation for Higher Education, Sankarpally Road, Hyderabad, AP., India
Golla Narayana Swamy
Sri Krishnadevaraya University, Anantapur, A.P., India,
L. K. Rao Ravindranath
Sri Krishnadevaraya University, Anantapur, A.P., India,
DOI: https://doi.org/10.15174/au.2014.564

Published 2014-05-21

Keywords

  • Aryl-hydrazono-pyrazolin-5-ones,
  • polarography,
  • cyclic voltammetry,
  • reduction mechanism.
  • Arílico hydrazono-pyrazolina-5-ones,
  • pola¬rografía,
  • voltametría cíclica,
  • mecanismo de reducción.

How to Cite

Srinivasan, P., Guru Prasad, A. R., Narayana Swamy, G., & Ravindranath, L. K. R. (2014). Electrochemical studies of certain novel N&lt;sup&gt;|&lt;/sup&gt;-(benzenesulfonyl)-3-methyl-4-(2&lt;sup&gt;|&lt;/sup&gt;-substituted-aryl hydrazono)- pyrazolin-5-ones. Acta Universitaria, 24(2), 8–19. https://doi.org/10.15174/au.2014.564

Abstract

Polarographic and cyclic voltammetric reduction of N|-(benzenesulfonyl)-3-methyl-4-(2|-substituted-aryl hydrazono)-pyrazolin-5-ones was carried out in 40% (v/v) dimethylformamide in Britton-Robinson buffer solutions of pH 1.1-10.1. Thermodynamic parameters i.e. enthalpy of activation ‘ΔH*p’, heat of activation at constant volume ‘ΔH*v’ and entropy of activation ‘ΔS*’ were evaluated. The reduction was found to be diffusion controlled and irreversible at all temperatures. The compound exhibits two polarographic waves in the entire pH range of study. The results obtained in polarography were compared with the results obtained in cyclic voltammetry and a mechanism for the electrode process was proposed in acidic and basic media.
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