Volume, enthalpy and entropy of activation of the Diels-Alder reaction of dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate with 1-hexene
作者:Vladimir D. Kiselev、Elena A. Kashaeva、Gulnara G. Iskhakova、Mahdi Shihab、Alexander I. Konovalov
DOI:10.1016/s0040-4020(99)00697-3
日期:1999.10
Pressure and temperature effects on the reaction rate of dimethyl 1,2,4,5-tetrazine-3,6-dicarboxylate with 1-hexene were investigated. The activation volume (−26.7 cm3 mol−1, 298.1 K) is in agreement with the conservation of all four nitrogen atoms in transition state. Densitometry, 1H NMR and calorimetric studies of the reaction indicate nitrogen molecule loss by the intermediate just after its formation
研究了压力和温度对1,2,4,5-四嗪-3,6-二羧酸二甲酯与1-己烯反应速率的影响。活化体积(-26.7厘米3摩尔-1,298.1 K)与在过渡状态的所有四个氮原子的保护协议。反应的光密度法,1 H NMR和量热研究表明,中间体刚形成后,氮分子就会损失。测定在二烯(127.2),1-己烯(127.6)和所得加合物(206.9cm 3 mol -1)的丙酮中的部分摩尔体积。