Potentiometric Studies on Electron Transfer Reactions of Anodically generated Manganese(III) Sulphate in Aqueous H2SO4-HOAc and Manganese(III) Acetate in Aqueous Acetic Acid

Oxidation of Semicarbazide and Semicarbazones

Ivan Pinto, B. S. Sherigara, K. Ishwara Bhat, H. V.K. Udupa

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Manganese(III) sulphate in aqueous sulphuric acid and manganese(III) acetate in aqueous acetic acid have been prepared by electrolytic methods with high current efficiency. The nature of the manganese(III) formed is elucidated spectrophotometrically. Condition for potentiometric determination of semicarbazide and its derivatives under different reaction conditions have been investigated. Hydrazinium sulphate or hydroquinone is employed as back-titrant. The number of electrons in these oxidations differed, depending on the nature of the molecule and the reaction condition. The free radical nature of the reaction intermediate is demonstrated. Manganese(III) sulphate and manganese(III) acetate oxidation of semicarbazide and its derivatives in aqueous H2SO4 or aqueous HOAc yielded different results, probably because of the changes in the coordination environment of manganese(III).

Original languageEnglish
Pages (from-to)47-53
Number of pages7
JournalJournal of the Indian Chemical Society
Volume73
Issue number1
Publication statusPublished - 01-01-1996
Externally publishedYes

Fingerprint

Semicarbazones
Manganese
acetic acid
Acetic acid
Acetic Acid
Sulfates
manganese
acetates
sulfates
electron transfer
Electrons
Oxidation
oxidation
Free Radicals
Derivatives
Reaction intermediates
Acids
reaction intermediates
Free radicals
free radicals

All Science Journal Classification (ASJC) codes

  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrochemistry

Cite this

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title = "Potentiometric Studies on Electron Transfer Reactions of Anodically generated Manganese(III) Sulphate in Aqueous H2SO4-HOAc and Manganese(III) Acetate in Aqueous Acetic Acid: Oxidation of Semicarbazide and Semicarbazones",
abstract = "Manganese(III) sulphate in aqueous sulphuric acid and manganese(III) acetate in aqueous acetic acid have been prepared by electrolytic methods with high current efficiency. The nature of the manganese(III) formed is elucidated spectrophotometrically. Condition for potentiometric determination of semicarbazide and its derivatives under different reaction conditions have been investigated. Hydrazinium sulphate or hydroquinone is employed as back-titrant. The number of electrons in these oxidations differed, depending on the nature of the molecule and the reaction condition. The free radical nature of the reaction intermediate is demonstrated. Manganese(III) sulphate and manganese(III) acetate oxidation of semicarbazide and its derivatives in aqueous H2SO4 or aqueous HOAc yielded different results, probably because of the changes in the coordination environment of manganese(III).",
author = "Ivan Pinto and Sherigara, {B. S.} and Bhat, {K. Ishwara} and Udupa, {H. V.K.}",
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AU - Pinto, Ivan

AU - Sherigara, B. S.

AU - Bhat, K. Ishwara

AU - Udupa, H. V.K.

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AB - Manganese(III) sulphate in aqueous sulphuric acid and manganese(III) acetate in aqueous acetic acid have been prepared by electrolytic methods with high current efficiency. The nature of the manganese(III) formed is elucidated spectrophotometrically. Condition for potentiometric determination of semicarbazide and its derivatives under different reaction conditions have been investigated. Hydrazinium sulphate or hydroquinone is employed as back-titrant. The number of electrons in these oxidations differed, depending on the nature of the molecule and the reaction condition. The free radical nature of the reaction intermediate is demonstrated. Manganese(III) sulphate and manganese(III) acetate oxidation of semicarbazide and its derivatives in aqueous H2SO4 or aqueous HOAc yielded different results, probably because of the changes in the coordination environment of manganese(III).

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