par Nasielski, Jacques ;Rypens, C.
Référence Journal of physical organic chemistry, 7, 10, page (545-550)
Publication Publié, 1994
Article révisé par les pairs
Résumé : The rate of the reaction of 2‐chloroquinoxaline with piperidine in dimethyl sulphoxide was measured over a wide range of amine concentrations and at several temperatures. It was found that the order with respect to the nucleophile is close to 1 between 300 and 320 K, but is definitely less at lower and higher temperature. It is suggested that below 300 K an unreactive charge‐transfer complex is formed between the reactants which dissociates at higher temperatures, whereas at temperatures higher than 320 K an unproductive σ complex is formed, the concentration of which increases with increase in temperature. Copyright © 1994 John Wiley & Sons, Ltd.