UHF/AM1 method has been applied to study the thermolyses of o-aminobenzoyl,
o-amino-p-methylbenzoyl, o-amino-p-formalbenzoyl azides, The results obtai
ned show that these reactions proced through various competing routes yield
ing to different products, and the activation energy of the rate-determinin
g steps of routes (2)-(4) are lower than that of route(1).