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- W1997617710 abstract "The reactions of the primary radicals of water radiolysis such as e aq - , H atom, OH radical and some oxidizing radicals like Cl 2 - and N 3 . with sulfanilamide (SA) have been studied under different conditions. SA reacts with OH radical at pH 7 to form an adduct which decays following second order kinetics. This adduct gets converted into a radical cation in acidic solutions below pH 4. Cl 2 - and N 3 . also oxidize SA to form this radical cation which gets deprotonated to anilino type radical with a pK a of 6.8. The hydrated electron and H atom react with SA with diffusion controlled rate constants, 9.4 x 10 9 dm 3 mol -1 s -1 and 2.1 x 10 9 dm 3 mol -1 s -1 respectively. The e aq - and H attack the -SO 2 NH 2 group of the side chain when SA is in neutral form and the resulting species with absorption maximum at 385 nm (e at 385 nm = 87 m 2 mol -1 at pH 7) subsequently forms NH 3 as one of the radiolytic products with G(NH 3 ) = 3.4. This is supported by the observation that when SA is in protonated form at pH 0.5, this transient is not produced and there is no ammonia formation." @default.
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- W1997617710 date "1997-09-01" @default.
- W1997617710 modified "2023-09-26" @default.
- W1997617710 title "Pulse radiolytic studies on the reactions of some oxidizing and reducing radicals with sulfanilamide in aqueous medium" @default.
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- W1997617710 doi "https://doi.org/10.1016/s0969-806x(97)00035-2" @default.
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