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Dergiler / Turkish Journal of Chemistry / 2005 / Cilt: 29 - Sayı: 6

Investigation of Electron Transfer Reaction Between Diphenylbenzidine and Ascorbic Acid

Iftikhar Imam NAQVI
Abida PERVEEN
Sayfa
627–634
Yayın Tarihi
2005-06-01
DOI
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A possible mechanism for the reaction is also proposed.

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Amaç & Hipotez:The kinetics of the reduction of diphenylbenzidine by ascorbic acid were investigated in the pH range 3.5 to 5.0.
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Temel Bulgular & Veri:Diphenylbenzidine was prepared by the oxidation of diphenylamine with cerium(IV) sulfate tetra hydrate.
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Sonuç & Katkı:A possible mechanism for the reaction is also proposed.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Turk. J. Chem. · (2005) · 627-634. Full text: pdf Other articles published in the same issue: Turk. J. Chem.

Özet

The kinetics of the reduction of diphenylbenzidine by ascorbic acid were investigated in the pH range 3.5 to 5.0. Diphenylbenzidine was prepared by the oxidation of diphenylamine with cerium(IV) sulfate tetra hydrate. The order of the reaction with respect to each of the reactants, i.e ascorbic acid (ASC), diphenylbenzidine (DPB) and H+ ,was found to be first. The following rate law is recommended: Rate = {k1 [C12H10N2C12H10] + k2K [C12H10N2C12H10][H+]}[C6H8O6] where k1 and k2 have the values of 2.0 \times 104 dm3mol-1 s-1 and 6.58 \times 103 dm3.mol-1.s-1 , respectively. K is the protonation constant of DPB, having a value of 476 dm3 mol-1. A possible mechanism for the reaction is also proposed.

Abstract

The kinetics of the reduction of diphenylbenzidine by ascorbic acid were investigated in the pH range 3.5 to 5.0. Diphenylbenzidine was prepared by the oxidation of diphenylamine with cerium(IV) sulfate tetra hydrate. The order of the reaction with respect to each of the reactants, i.e ascorbic acid (ASC), diphenylbenzidine (DPB) and H+ ,was found to be first. The following rate law is recommended: Rate = {k1 [C12H10N2C12H10] + k2K [C12H10N2C12H10][H+]}[C6H8O6] where k1 and k2 have the values of 2.0 \times 104 dm3mol-1 s-1 and 6.58 \times 103 dm3.mol-1.s-1 , respectively. K is the protonation constant of DPB, having a value of 476 dm3 mol-1. A possible mechanism for the reaction is also proposed.

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Bu Makaleye Atıf Yap

NAQVI, I. I., PERVEEN, A. (2005). Investigation of Electron Transfer Reaction Between Diphenylbenzidine and Ascorbic Acid. Turkish Journal of Chemistry, Cilt: 29 - Sayı: 6, 627–634. https://ajindex.com/articles/227800

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Kaynakça (11)

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