| Autor: |
Kwiatek, B, Kalinowski, MK |
| Zdroj: |
Australian Journal of Chemistry; 1988, Vol. 41 Issue: 12 p1963-1969, 7p |
| Abstrakt: |
The effect of benzoic acid on the polarographic reduction of a series of aromatic ketones in N,N- dimethylformamide has been investigated. In the presence of this acid a new cathodic wave (pre-wave) appears at more positive potentials than the original (orig.) wave of the reactant. A linear correlation has been found between ΔE½ and the pKBH+ values, where ΔE½ = E½ pre.wave -E½orig.wave and pKBH+ stands for the negative logarithm of the acidity constant of the protonated ketone . It is concluded that the pre-wave is associated with the cathodic reduction of a hydrogen-bonded adduct of 1 : 1 type formed between the carbonyl compound and the acid in the double layer. The effect of the double layer on the basicity of the ketones is discussed. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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