Calorimetric Study of Triphenylbismuth Dimethacrylate Ph3Bi(O2CCMe═CH2)2

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• 作者：Irina A. Letyanina ; Alexey V. Markin ; Alexey V. Gushchin ; Natalia N. Smirnova ; Marina N. Klimova ; Olga S. Kalistratova
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2016
• 出版时间：July 14, 2016
• 年：2016
• 卷：61
• 期：7
• 页码：2321-2329
• 全文大小：409K
• 年卷期：0
• ISSN：1520-5134

文摘

In the present research, the heat capacities of triphenylbismuth dimethacrylate Ph₃Bi(O₂CCMe═CH₂)₂ were measured between T = 5.3 and 330 K with the precision adiabatic vacuum calorimeter and from T = 310 to 420 K with the differential scanning calorimeter. There revealed a reproducible anomaly from 150 to 170 K caused by structural changes in the crystal lattice, and intensive exothermic transition over the range from T = 385 to 420 K caused by the reductive decomposition with the polymerization of the sample under study. The experimental results were used to calculate the standard (p = 0.1 MPa) thermodynamic functions (heat capacity C_p,m^o, enthalpy H_m^o(T) – H_m^o(0), entropy S_m^o(T), and Gibbs energy Φ_m^o(T) of crystalline triphenylbismuth dimethacrylate from T → 0 to 385 K. The standard entropy of formation at T = 298.15 K was calculated for the compound under study in the crystalline state. Obtained for Ph₃Bi(O₂CCMe═CH₂)₂ results were compared with ones for Ph₃Sb(O₂CCMe═CH₂)₂.