The reactions of a series of substituted benzohydrazonoyl halides with cyclic
secondary amines in benzene as solvent are investigated. The rate equations
for these reactions were complex and the derived rate data are reported. The
element effect data showed that the fluoro compounds only reacted when a
second amine molecule was available to assist the reaction, whereas the chloro
and bromo compounds reacted by reactions which were both first order and
second order in amine
(k′′Br :
k′′Cl =
9·5 : 1 and
k′′′Br
:k′′′Cl :
k′′′F = 4·7 : 1 :
0·65). The mechanism of these reactions is discussed.
以
苯为溶剂,研究了一系列取代的
苯甲
酰卤与环状仲胺的反应。
仲胺在
苯溶剂中的反应进行了研究。这些反应的速率方程
并报告了得出的速率数据。元素效应数据显示
元素效应数据显示,
氟化合物只有在
氟化合物只有在有第二个胺分子辅助反应时才会发生反应,而
氯
和
溴化合物的反应既有一阶反应,也有二阶反应。
二阶胺反应
(k′′Br :
k′′Cl =
9-5 : 1 和
k′′Br
:k′′′Cl :
k′′′F = 4-7 : 1 :
0-65).讨论了这些反应的机理。