Abstract In the present research the temperature dependence of the heat capacity of triphenylantimony bis-phenylpropiolate Ph3Sb(OC(O)C CPh)2 was measured by precision adiabatic vacuum and differential scanning calorimeters and reported for the first time. In the studied temperature region, the melting accompanying decomposition of the compound was revealed and the fusion temperature was determined as 431.5 K. By using the obtained experimental data the standard thermodynamic functions (р° =0.1 MPa) of Ph3Sb(OC(O)C CPh)2 in crystalline state were calculated: C p o ( T ) – the heat capacity; H°(T)−H°(0) – the enthalpy; S°(T)−S°(0) – the entropy; G°(T)−H°(0) – the Gibbs energy over the temperature range from T → 0 K–450 K. The standard formation entropy of the substance in the crystalline state at T = 298.15 K were calculated. The thermodynamic data of the antimony derivative studied in the present work was compared in this study with those of Ph5Sb and other of type Ph3SbX2.

中文翻译：

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三苯基双苯基丙炔酸锑的热力学

摘要 本研究首次通过精密绝热真空和差示扫描量热仪测量了双苯基丙炔酸三苯锑Ph3Sb(OC(O)C CPh)2的热容随温度的变化规律。在研究的温度范围内，揭示了化合物的熔化伴随分解，熔化温度确定为 431.5 K。 通过使用获得的实验数据，Ph3Sb(OC(O)C 的标准热力学函数 (р° = 0.1 MPa)计算结晶状态的 CPh)2： C po ( T ) – 热容；H°(T)−H°(0) – 焓；S°(T)−S°(0) – 熵；G°(T)−H°(0) – 在 T → 0 K–450 K 温度范围内的吉布斯能量。计算了 T = 298.15 K 时结晶态物质的标准形成熵。