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Reactions of reducing radicals with 2- and 3-nitroanilines in aqueous solutions: a pulse radiolysis study

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Reactions of 2- and 3-nitroanilines (2- and 3-NA) with eaq, H-atoms and one-electron reductants have been studied using pulse radiolysis in aqueous solutions. Reactions of eaq were found to be quite fast with both 2-NA and 3-NA resulting in their corresponding semi-reduced species which are reducing in nature. Reduction potentials for 2-NA/2-NA•− have been estimated to be approx. −0.56 V vs. NHE and that for 3-NA/3-NA•− was found to be between −0.185 V and −0.45 V vs. NHE. Semi-reduced 2-NA has main absorption peak at 300 nm with a shoulder in the 350 nm region and a broad weak band in the 470–500 nm region, whereas semi-reduced 3-NA possesses an absorption peak at 520 nm. Reducing radicals such as (CH3)2COH and CO2•− reacted with 2-NA, producing semi-reduced species, whereas reactions of these radicals with 3-NA produced their corresponding radical-adduct species.

Affiliations: 1: Water and Steam Chemistry Division, Kalpakkam, Tamil Nadu-603102, India; 2: Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India; 3: Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India;, Email:


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