氯亚乙基肼基甲酸乙酯生成反应热动力学研究

Thermodynamic properties of the formation reaction of 2-chloroethylideneaminocarbamic acid ethylester

利用微量热量计测定了氯乙醛和肼基甲酸乙酯在水溶液中(298.15K)生成氯亚乙基肼基甲酸乙酯的反应焓变为(-13.035±0.088)kJ/mol。计算得出该反应的热动力学参数:反应级数n=1;速率常数k=2.018×10-3s-1及反应活化自由能ΔG ≠=88.408kJ/mol。结果表明,该反应在室温下易于进行。

The enthalpy of reaction of the 2-chloroethylideneaminocarbamic acid ethylester formation from (chloroacetaldehyde) and hydrazinoformic acid ethylester in water at 298.15 K was determined by a microcalorimeter. The experiment concluded the following parameters: the enthalpy of formation Δ_rH~_m=(-13.035±0.088) kJ/mol; the reaction order n = 1; the rate constant k=2.018×10^(-3)s^(-1)and the free energy of activation ΔG~_≠=(88.408) kJ/mol. The result indicates that the reaction takes place easily at room temperature in water.