A kinetic study of the thermolysis of N-crotyl substituted 1,2,4-triazoles

A kinetic study of the thermolysis of 4-crotyl-3,5-dipheny1-4H-1,2,1-triazo le (1) in a melt of the neat compound was performed at temperatures in the range of 260-350 degreesC. The main products formed were 1-crotyl-3,5-diphe nyl-1H-1,2,4-triazole (3) and 1-(1-methylallyl)-3,5-diphenyl-1H-1,2,4-triaz ole (4) together with 3-methyl-2,6-diphenylpyridine (2) and 3,5-diphenyl-1, 2,4-triazole (5). Products 2 and 5 were both formed preferentially from 3 a nd 4. in the melt was observed first order kinetics. Activation parameters fur formation of 3 and 4 were determined. Product 3. E-a = 95 kJ/mole. Prod uct 4: E-a = 145 kJ/mole.