高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (3): 361.

• 研究简报 • 上一篇    下一篇

N-苯基-N′-(1,2,3-噻二唑-5-基)脲生成反应的热化学性质研究

孙晓红1,2, 刘源发3, 高胜利3, 张晓玉3   

  1. 1. 西北大学化学研究所, 西安 710069;
    2. 西北大学化工系, 西安 710069;
    3. 西北大学化学系, 西安 710069
  • 收稿日期:2001-02-14 出版日期:2002-03-24 发布日期:2002-03-24
  • 通讯作者: 高胜利(1946年出生),男,教授,从事配合物的相化学和热化学研究.E-mail:ssh91168@public.xa.sn.cn E-mail:ssh91168@public.xa.sn.cn
  • 基金资助:

    国家自然科学基金(批准号:29871023);陕西省教委重点科研项目(批准号:99JK09)资助

Research for the Thermochemical Properties of the Formation Reaction of -N-Phenyl-N′-(1,2,3-thiadiazol-5-yl)urea

SUN Xiao-Hong1,2, LIU Yuan-Fa3, GAO Sheng-Li3, ZHANG Xiao-Yu3   

  1. 1. Chemical Research Institute of Northwest University, Northwest University, Xi'an 710069, China;
    2. Department of Chemical Engineering, Northwest University, Xi'an 710069, China;
    3. Department of Chemistry, Northwest University, Xi'an 710069, China
  • Received:2001-02-14 Online:2002-03-24 Published:2002-03-24

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关键词: N-苯基-N&prime, -(1, 2, 3-噻二唑-5-基)脲, 生成反应, 热化学性质

Abstract: The enthalpy change of formation reaction of the N-phenyl-N′-(1,2,3-thiadiazol-5-yl)urea has been determined by a microcalorimeter, using 5-amino-1,2,3-thiadiazole and phenylisocyanate as starting materials in the solvent of THF. The reaction temperature was kept at 25 ℃. On the basis of experimental and calculated results, the enthalpy change is ΔrHmo=(-142.304±0.390) kJ·mol-1; the reaction order is n=1/2; the rate constant k=1.3579×10-4 s-1 and the activation free-energy is ΔGmo=95.098 kJ·mol-1. The result indicates that the title reaction takes place easily at room temperature.

Key words: N-Phenyl, N′-(1,2,3-thiadiazol-5-yl)urea, Formation reaction, Thermochemical property

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