Abstract
In the present research the temperature dependence of the heat capacity of triphenylantimony bis-phenylpropiolate Ph3Sb(OC(O)CCPh)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)CCPh)2 in crystalline state were calculated: Cpo(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.
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