Enthalpies of combustion and formation of 2-acetylpyrrole, 2-acetylfuran and 2-acetylthiophene

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• 作者：Henoc Flores ; E. Adriana Camarillo ; Juan Mentado
• 关键词：Rotating-bomb calorimeter ; Static-bomb calorimeter ; Combustion energies ; Formation enthalpies ; 2-Acetylpyrrole ; 2-Acetylfuran ; 2-Acetylthiophene
• 刊名：Thermochimica Acta
• 出版年：2009
• 出版时间：10 September 2009
• 年：2009
• 卷：493
• 期：1-2
• 页码：76-79
• 全文大小：145 K

文摘

The combustion energies for 2-acetylpyrrole (cr) and 2-acetylfuran (cr) were determined using a static bomb calorimeter, whereas the combustion energy of 2-acetylthiophene (l) was determined with a rotating bomb calorimeter; both calorimeters have been recently described. The molar combustion energies obtained were: −(3196.1 ± 0.6) kJ mol^−1 for 2-acetylpyrrole, −(2933.8 ± 0.7) kJ mol^−1 for 2-acetylfuran, and −(3690.4 ± 0.8) kJ mol^−1 for 2-acetylthiophene. From these combustion energy values, the standard molar enthalpies of formation in the condensate phase were obtained as: −(163.51 ± 0.97) kJ mol^−1, −(283.50 ± 1.06) kJ mol^−1 and −(123.93 ± 1.15) kJ mol^−1, respectively. The obtained values of combustion and formation enthalpies of 2-acetylthiophene are in concordance with the reported previously. For the two last compounds, polyethene bags were used as an auxiliary material in the combustion experiments. The heat capacities and purities of the compounds were determined using a differential scanning calorimeter.