2,2′-dinitrobenzidine (2,3′-DNB) gives a single diffusion-limited irreversible polarographic wave in buffered aqueous methanol. Microcoulometric experiments indicate a transfer of ten electrons in the reduction and cyclic voltammetric studies show direct proof for the existence of a nitroso intermediate. Based on the results obtained, a suitable mechanism is proposed for the reduction of 2,3′-DNB in buffered methanolic solutions. © 1989 Chapman and Hall Ltd.

S. Aravamuthan

Chatty Kalidas

Chittoor Sivaramakrishnan Venkatachalam

Electrochemistry

Methanol

DIMETHYL FORMAMIDE

DINITROBENZIDINE

METHANOLIC SOLUTIONS

Organic compounds

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Electrochemical reduction of 2,3'-dinitrobenzidine in buffered aqueous methanol

Journal of Applied Electrochemistry

The electrochemical reduction of 2,3 prime -dinitrobenzidine (I) has been investigated in N,N-dimethylformamide solutions. Three diffusion-controlled polarographic waves were obtained. The first wave is due to a reversible single electron-transfer while the second and third waves result from irreversible processes involving one and two electron-transfers, respectively. The radical anion formed in the first step of reduction was confirmed by ESR technique. The red color compound formed due to 'ion association' after the second electron-transfer step gives rise to a polarographic 'minimum' and a 'dip' in the chronopotentiogram in addition to the new 'peak clusters' seen in cyclic voltammograms.

Berichte der Bunsengesellschaft/Physical Chemistry Chemical Physics

ELECTROCHEMICAL BEHAVIOUR OF 2,3 prime -DINITROBENZIDINE IN N,N-DIMETHYLFORMAMIDE.

The electrochemical reduction of 2-nitrobenzidine (I) has been investigated in N,N-dimethylformamide solutions. Two well-defined polarographic waves in the ratio 1:3 were obtained. The first wave was found to be a reversible, diffusion-controlled, single electron wave while the second was the result of a diffusion-controlled, irreversible, three-electron process with chemical complications. The nitro and nitroso anion radical intermediates of I formed during the CPE experiments were detected by an ESR technique and confirmed later by cyclic voltammetry. The "current oscillations" observed in the cyclic voltammograms of I are discussed. An eece-type of sequence is suggested for I reduction leading to the formation of 2-hydroxylaminobenzidine. © 1984.

Journal of Electroanalytical Chemistry

Electrochemical behaviour of 2-nitrobenzidine in N,N-dimethylformamide

The polarographic reduction of 4-nitro DPA in methanol-water mixtures of varying composition (30-80% v/v) in the pH range 1-12 was investigated. A single wave was observed in the reduction in these media at all pH values and solvent compositions. The number of electrons involved in the reduction was found to be six in all solutions indicating that 4-amino DPA is the final product. A mechanism consistent with these observations which involves the formation of 4-hydroxylaminodiphenylamine as an intermediate has been proposed. © 1978 Elsevier Sequoia S.A.

Polarography of 4-nitrodiphenylamine (DPA) in methanol-water mixtures

Journal of Electroanalytical Chemistry and Interfacial Electrochemistry

Photoelectrochemistry and solar energy: progress, promise and problems

Collection of Czechoslovak Chemical Communications

Electrochemical reduction of 2,2'-dinitrodiphenylmethane and 2,2'-dinitrobenzophenone at mercury electrodes

Electrochemical reduction of 2,3′-dinitrobenzidine in buffered aqueous methanol

Journal	Journal of Applied Electrochemistry
Publisher	Kluwer Academic Publishers
ISSN	0021891X
Open Access	No