Electrochemical reduction of p-chloronitrobenzene in dipolar aprotic solvents containing carboxylic acids

• Autorzy: Wagner-Czauderna E. , Orłowska E. , Kalinowski M.K.
• Języki publikacji: EN

Abstrakty

EN

The effect of carboxylic acids of different strenght on polarographic behaviour of p-chloronitrobenzene in N, N-dimethylformamide has been investigated. In the presence of each acid a pre-wave appeared at a more positive potential than the original one, which was associated with the cathodic reduction of a hydrogen-bonded adduct, formed between the nitrocompound and the acid molecules in the double layer of the electrode. A linear correlation has been found between delta E-1/2 and pK(DMF/HA) (pK(DMF/HA) refers to the value of the pK-a measured in N, N-dimethylformamide, whereas delta E-1/2=E(pre-wave/1/2) - E(original wave/1/2)). Measurements in a solvent series in the presence of benzoic acid (BA) led to the correlation between delta E-1/2 and pK-BA (the symbol pK-BA denotes the value measured in a given solvent). The slopes of regression lines are discussed in terms of the double layer effect on the basicity of the -NO2 group.

Słowa kluczowe

EN

electroreduction; basicity of the nitro group; double layer effect; nonaqueous solvents

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1998
• Tom: Vol. 72, nr 9
• Strony: 2127--2133
• Opis fizyczny: Bibliogr. 17 poz., tab., wykr.

Twórcy

autor

Wagner-Czauderna E.

autor

Orłowska E.

autor

Kalinowski M.K.

• Department of Chemistry, University of Warsaw, 1 Pasteur St., 02-093 Warszawa, Poland