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题名: Thermodynamic study of methyl N-(4,6-dimethoxypyrimidin-2-yl)carbamate
作者: Xing, J;  Tan, ZC;  Di, YY;  Sun, XH;  Sun, LX;  Zhang, T
关键词: methyl N-( 4, 6-dimethoxypynimidin-2-yl) carbamate ;  adiabatic calorimetry ;  low-temperature heat capacity ;  thermodynamic function ;  TG-DTG ;  DSC
刊名: ACTA CHIMICA SINICA
发表日期: 2004-12-28
卷: 62, 期:24, 页:2415-2420
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: 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 he (26.289 +/- 0.029) kJ. mol(-1) and (73.597 +/- 0.070) J.K-1.mol(-1) mol(-1), respectively. The purity, the real melting point (T-1) and the ideal melting point without any impurity or with absolute purity (T-0) 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.
关键词[WOS]: HEAT-CAPACITY MEASUREMENTS ;  ADIABATIC CALORIMETER ;  SMALL SAMPLES
语种: 英语
WOS记录号: WOS:000225983900009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139509
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Thermochem Lab, Dalian 116023, Peoples R China
2.Dalian Univ Technol, Dept Chem & Chem Engn, Dalian 116622, Peoples R China
3.NW Univ Xian, Dept Chem, Xian 710069, Peoples R China

Recommended Citation:
Xing, J,Tan, ZC,Di, YY,et al. Thermodynamic study of methyl N-(4,6-dimethoxypyrimidin-2-yl)carbamate[J]. ACTA CHIMICA SINICA,2004,62(24):2415-2420.
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