Reactions of hydroxymethylated 2-methoxy- and 2-methyl-4,6-diamino-s-triazines with urea

The reactions of hydroxymethylated 2-methyoxy- (MMT) and 2-methyl-4,6-diamino-s-triazines (MAG) which had an average degree of formaldehyde (F) substitution (n) = 2, with urea were studied in acidic aqueous solution in the pH 5-1.6 region. The observed facts were in fairly good agreement with the rate equations. The reaction rate constants of MMT with urea were greater than those of MAG with urea, but their activation energy was almost equal: MMT, 20.3; MAG, 20.2 kcal/mole. For reference summaries of earlier studies were provided.