[an error occurred while processing this directive]

高等学校化学研究 ›› 2010, Vol. 26 ›› Issue (2): 304-308.

• Articles • 上一篇    下一篇

Crystal Structure and Thermodynamic Study of Ephedrine Hydrochloride C10H16NOCl(s)

YANG Wei-wei, DI You-ying*, LI Jing and KONG Yu-xia   

  1. College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, P. R. China
  • 收稿日期:2009-02-23 修回日期:2009-05-12 出版日期:2010-03-25 发布日期:2010-05-25
  • 通讯作者: DI You-ying. E-mail: yydi@lcu.edu.cn; diyouying@126.com
  • 基金资助:

    Supported by the National Natural Science Foundation of China(Nos.20673050 and 20973089).

Crystal Structure and Thermodynamic Study of Ephedrine Hydrochloride C10H16NOCl(s)

YANG Wei-wei, DI You-ying*, LI Jing and KONG Yu-xia   

  1. College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, P. R. China
  • Received:2009-02-23 Revised:2009-05-12 Online:2010-03-25 Published:2010-05-25
  • Contact: DI You-ying. E-mail: yydi@lcu.edu.cn; diyouying@126.com
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.20673050 and 20973089).

PDF (PC)

摘要：

The crystal structure of ephedrine hydrochloride was determined by means of X-ray crystallography. The crystal system of the compound is monoclinic, and the space group is P21. Unit cell parameters are a=0.7308(6) nm, b=0.6124(5) nm, and c=1.2618(11) nm; α=90°, β=102°, and γ=90°; Z=2. Low-temperature heat capacities of the title compound were measured with an improved precision automated adiabatic calorimeter over a temperature range from 77 K to 396 K. A polynomial equation of the heat capacities as a function of temperature in the temperature region was fitted by the least-squares. Based on the fitted polynomial equation, the smoothed heat capacities and thermodynamic functions of the compound relative to the standard reference temperature 298.15 K were calculated and tabulated at the intervals of 5 K.

关键词: Ephedrine hydrochloride C10H16NOCl(s); X-ray crystallography; Adiabatic calorimetry; Low-temperature heat capacity; Thermodynamic function

Abstract:

The crystal structure of ephedrine hydrochloride was determined by means of X-ray crystallography. The crystal system of the compound is monoclinic, and the space group is P21. Unit cell parameters are a=0.7308(6) nm, b=0.6124(5) nm, and c=1.2618(11) nm; α=90°, β=102°, and γ=90°; Z=2. Low-temperature heat capacities of the title compound were measured with an improved precision automated adiabatic calorimeter over a temperature range from 77 K to 396 K. A polynomial equation of the heat capacities as a function of temperature in the temperature region was fitted by the least-squares. Based on the fitted polynomial equation, the smoothed heat capacities and thermodynamic functions of the compound relative to the standard reference temperature 298.15 K were calculated and tabulated at the intervals of 5 K.

Key words: Ephedrine hydrochloride C10H16NOCl(s); X-ray crystallography; Adiabatic calorimetry; Low-temperature heat capacity; Thermodynamic function