The thermodynamic properties of thianthrene and phenoxathiin
The thermodynamic properties of thianthrene and phenoxathiin
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DOI：
10.1006/jcht.1993.1093
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发表时间：
1993-04
期刊：
影响因子：
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通讯作者：
W. Steele;R. Chirico;S. E. Knipmeyer;A. Nguyen
中科院分区：
文献类型：
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作者：
W. Steele;R. Chirico;S. E. Knipmeyer;A. Nguyen
本文报道了噻蒽（化学文摘登记号[92-85-3]）和吩恶噻（登记号[262-20-4]）的标准热力学性质的计算。实验方法包括燃烧量热法、绝热热容量热法、振动管密度测定法、比较沸点测定法、倾斜活塞压力计法和差示扫描量热法。根据测量结果估计了两种材料的临界特性。在298.15 K和700 K之间的选定温度下，导出了两种化合物的气体的标准熵、熵和吉布斯自由能。在这里报道的性质测量结果噻蒽和吩恶噻提供了第一个实验气相标准吉布斯自由能的三环双杂原子含分子的形成。
Abstract Measurements leading to the calculation of the standard thermodynamic properties are reported for thianthrene (Chemical Abstracts registry number [92-85-3]) and phenoxathiin (registry number [262-20-4]). Experimental methods included combustion calorimetry, adiabatic heat-capacity calorimetry, vibrating-tube densitometry, comparative ebulliometry, inclined-piston-gauge manometry, and differential-scanning calorimetry (d.s.c.). Critical properties were estimated for both materials based on the measurement results. Standard entropies, enthalpies, and Gibbs free energies of formation were derived for the gas for both compounds for selected temperatures between 298.15 K and 700 K. The property-measurement results reported here for thianthrene and phenoxathiin provide the first experimental gas-phase standard Gibbs free energies of formation for tricyclic diheteroatom-containing molecules.