Thermochemistry of sesquiterpene lactone argolide

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• 作者：Sh. B. Kasenova ; G. A. Atazhanova ; B. K. Kasenov…
• 关键词：C15H20O3 argolide ; thermodynamic functions of dissolution ; dynamic calorimetry
• 刊名：Russian Journal of Physical Chemistry A
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：91
• 期：1
• 页码：6-9
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry;
• 出版者：Pleiades Publishing
• ISSN：1531-863X
• 卷排序：91

文摘

The enthalpies of dissolution of argolide (Cb>15b>Hb>20b>Ob>3b>) in 96% ethanol are determined by isothermal calorimetry at 298.15 K and different dilutions of 1: 18 000, 1: 36 000, and 1: 72 000 (by mole). The standard enthalpy of dissolution of argolide in 96% ethanol is calculated from the obtained data: (86 ± 17) kJ mol−1. The temperature dependence of heat capacity of Cb>15b>Hb>20b>Ob>3b> is studied by means of dynamic calorimetry. An equation is derived to describe the Сb>pb>0~ f (Т) dependence, and the standard heat capacity at 298.15 K is found to be (393 ± 13) J mol−1 K−1. The enthalpies of combustion, fusion and formation of argolide are calculated via approximation.