Investigation son the thermal stability of a diazonium ion on solid support

摘要

We have synthesised a diazonium ion starting from 2-chloro-5-aimobenzyl alcohol, and investigated in detail its thermal stabi- lity. The DSC runs at seven different heating rates give evidence of a single decomposition reaction occurring around 90-120 deg. C, whose kinetics were analysed by both the iso-conversional differential and integral method, the inarinat kinetic parameters method, Kissinger's method, and a differential isothermal method. All of these methods led to similar values for the kinetic para- meters and showed that the first-order mechanism fits the data best. The values of the kinetic parameters were further used for calculating the half-life time of the ion at various temperatures. The result of the stability prediction at 60 deg. C was compared with that of an analytical isothermal test yielding a good agreement between prediction and experiment.