Thermodynamic properties of triphenylantimony dibenzoate


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The temperature dependence of the heat capacity of triphenylantimony dibenzoate Ph3Sb(OC(O)Ph)2 is studied in the range of 6–480 K by means of precision adiabatic vacuum calorimetry and differential scanning calorimetry. The melting of the compound is observed in this temperature range, and its standard thermodynamic characteristics are identified and analyzed. Ph3Sb(OC(O)Ph)2 is obtained in a metastable amorphous state in a calorimeter. The standard thermodynamic functions of Ph3Sb(OC(O)Ph)2 in the crystalline and liquid states are calculated from the obtained experimental data: Cp°(T), H°(T)–H°(0), S°(T), and G°(T)–H°(0) for the region from T → 0 to 480 K. The standard entropy of formation of the compound in the crystalline state at T = 298.15 K is determined. Multifractal processing of the low-temperature (T < 50 K) heat capacity of the compound is performed. It is concluded that the structure of the compound has a planar chain topology.

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A. Markin

Chemistry Research Institute

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Email: markin@calorimetry-center.ru
俄罗斯联邦, Nizhny Novgorod, 603950

N. Smirnova

Chemistry Research Institute

Email: markin@calorimetry-center.ru
俄罗斯联邦, Nizhny Novgorod, 603950

D. Lyakaev

Chemistry Research Institute

Email: markin@calorimetry-center.ru
俄罗斯联邦, Nizhny Novgorod, 603950

M. Klimova

Chemistry Research Institute

Email: markin@calorimetry-center.ru
俄罗斯联邦, Nizhny Novgorod, 603950

V. Sharutin

South Ural State University (National Research University)

Email: markin@calorimetry-center.ru
俄罗斯联邦, Chelyabinsk, 454080

O. Sharutina

South Ural State University (National Research University)

Email: markin@calorimetry-center.ru
俄罗斯联邦, Chelyabinsk, 454080

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