The kinetics and primary products of uracil chlorination

摘要: Abstract The reaction between free available chlorine (FAC) and the pyrinidine base uracil, was studied over a pH range of 5–9 at FAC to uracil ratios 0.5 5 mol −1 . Rate constants for were obtained primary chlorination products identified. found adhere very well mixed second order kinetics molar ⩾ ∼ 1.0. At ratio , demonstrated reasonable empirical fit same kinetic model. rate constant markedly dependent increasing from approx. 0.3 M s = above 7 low while respective values high 90 yielded exclusively 5-chlorouracil higher ratios, dichlorouracil isolated in pure form characterized spectrometrically. This material only organic chloramine detected any systems. While evidence breakdown ring, little formation secondary chloramines found. characteristic odor nitrogen trichloride noted FAC/uracil ratios. consumption increased 1 per consumed 3 initial ≈ uracil.