Thermodynamic Study of Methyl N-(4,6-Dimethoxypyrimidin-2-yl)carbamate

Acta Chimica Sinica ›› 2004, Vol. 62 ›› Issue (24): 2415-2420. Previous Articles Next Articles

4,6-二甲氧基-2-嘧啶氨基甲酸甲酯的热力学研究

邢军^1,2, 谭志诚¹, 邸友莹¹, 孙晓红³, 孙立贤¹, 张涛¹

1. 中国科学院大连化学物理研究所, 热化学实验室, 大连, 116023;
2. 大连大学化学与化学工程系, 大连, 116622;
3. 西北大学化学研究所, 西安, 710069

投稿日期:2004-01-30 修回日期:2004-09-11 发布日期:2014-02-17
通讯作者: 谭志诚,E-mail:tzc@dicp.ac.cn E-mail:tzc@dicp.ac.cn
基金资助:
国家自然科学基金(No.20373072)资助项目.

Thermodynamic Study of Methyl N-(4,6-Dimethoxypyrimidin-2-yl)carbamate

XING Jun^1,2, TAN Zhi-Cheng¹, DI You-Ying¹, SUN Xiao-Hong³, SUN Li-Xian¹, ZHANG Tao¹

1. Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023;
2. Department of Chemistry and Chemical Engineering, Dalian University, Dalian 116622;
3. Department of Chemistry, Northwest University, Xi'an 710069

Received:2004-01-30 Revised:2004-09-11 Published:2014-02-17

Abstract

The low-temperature heat capacities of the methyl N-(4,6-dimethoxypyrimidin-2-yl)carbamate were measured with an automatic adiabatic calorimeter over the temperature range from 80 to 380 K. A solid-liquid phase transition was observed at T_m=(357.201?0.080) K, and the molar enthalpy and entropy of fusion were determined to be (26.289?0.029) kJ·mol^-1 and (73.597?0.070) J·K^-1 ·mol^-1, respectively. The purity, the real melting point (T₁) and the ideal melting point without any impurity or with absolute purity (T_o) of the compound under investigation were determined to be 99.10 mol%, 357.085 and 357.449 K, respectively, through fractional melting method. The thermodynamic functions relative to the reference temperature 298.15 K were derived based on the heat capacity measurements. Further research on thermodynamic properties of this compound was carried out by means of TG-DTG and DSC techniques. The boiling point and the enthalpy of evaporation for the compound were determined to be 488.06 K and 81.73 kJ·mol^-1, respectively.

Key words: methyl N-(4,6-dimethoxypyrimidin-2-yl)carbamate, adiabatic calorimetry, low-temperature heat capacity, thermodynamic function, TG-DTG, DSC

Cite this article

XING Jun, TAN Zhi-Cheng, DI You-Ying, SUN Xiao-Hong, SUN Li-Xian, ZHANG Tao. Thermodynamic Study of Methyl N-(4,6-Dimethoxypyrimidin-2-yl)carbamate[J]. Acta Chimica Sinica, 2004, 62(24): 2415-2420.

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4,6-二甲氧基-2-嘧啶氨基甲酸甲酯的热力学研究

Thermodynamic Study of Methyl N-(4,6-Dimethoxypyrimidin-2-yl)carbamate

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