Abstract
Reaction of malonaldehyde (MA) with 2-thiobarbituric acid (TBA) in model systems resulted in the formation of the typical pink adduct (TMT) with absorption minima at 278, 372, and 532 nm. Reactions of MA with sulfanilamide (SA) produced a bright yellow adduct (SMS) with absorption minima at 256, 332, and 396 nm. Addition of TBA to the MA-SA system resulted in the disappearance of the characteristic absorption bands of SMS and the appearance of the characteristic absorption bands of TBA-MA as well as a new band at 472 nm
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