Abstract The energy of combustion of liquid 1,3,3-trimethylcyclopropene was obtained in isoperibolic calorimeter at T = 298.15 K. The saturated vapour pressures were determined by the comparative ebulliometry in the temperature range 295-310 K. The normal boiling temperature and the enthalpy of vaporization were estimated based on p-T-data. The enthalpy of vaporization was measurement by calorimetric method at T = 298.15 K. The density was determined by pycnometric method at T = 293.15 K. The formation enthalpies of the compound in liquid and gas states were determined using the obtained experimental data. The enthalpies of formation in the gaseous state for cyclopropene and its methyl-substituted derivatives were estimated by G4 method.

中文翻译：

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1,3,3-三甲基环丙烯的热力学性质

摘要 液体 1,3,3-三甲基环丙烯的燃烧能量在 T = 298.15 K 下在等周热量计中得到。饱和蒸气压是在 295-310 K 温度范围内通过比较沸腾法测定的。基于 pT 数据估计蒸发焓。在 T = 298.15 K 下通过量热法测量蒸发焓。在 T = 293.15 K 下通过比重瓶法确定密度。使用获得的实验数据确定液态和气态化合物的形成焓。环丙烯及其甲基取代衍生物的气态生成焓通过 G4 方法估算。