The Journal of Organic Chemistry

2-Azidoazobenzenes. 3. Kinetics of the thermal decomposition to give 2-arylbenzotriazoles

JH Hall, FW Dolan

Index: Hall,J.H.; Dolan,F.W. Journal of Organic Chemistry, 1978 , vol. 43, # 24 p. 4608 - 4612

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Citation Number: 16

Abstract

A series of 2-azido-4'-R-azobenzenes has been prepared and the rate of their thermal decomposition to give 2-(4-R-pheny1) benzotriazoles has been determined in anisole. The effect of substituents was small, showing a slight acceleration by electron withdrawing groups. The reaction exhibited an isokinetic region at 77 f 20" C. In several cases, rates were observed on each side of the isokinetic temperature. The enthalpy of activation varied ...