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化学学报
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化学学报 ›› 1981, Vol. 39 ›› Issue (6): 485-492.    下一篇

论文

键能的研究——马尿酸、哌嗪、氮七环燃烧热的测定

安绪武, 张中良, 王水哖, 阎俊青, 胡日恒   

  1. 中国科学院化学研究所 北京
  • 投稿日期:1979-10-05 发布日期:2013-06-03

INVESTIGATION ON BOND ENERGIES： THE HEAT OF COMBUSTION OF HIPPURIC ACID, PIPERAZINE AND AZACYCLOHEPTANE

AN XU-WU, ZHANG ZHONG-LIANG, WANG SHUI-NIAN, YAN JUN-QING, HU RI-HENG(HU JIH-HENG)   

  1. Institute of Chemistry, Academia Sinica, Beijing
  • Received:1979-10-05 Published:2013-06-03

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644

被引次数

5

使用精密氧弹量热计测定了下列物质的燃烧热△H-o和生成热△H0f(1)马尿酸(c)-1008.30±0.22;(2)哌嗪(c)-707.79±0.27和-9.99±0.27及(3)氮七环(1)-987.03±0.39和-21.35±0.39kcal/mol.利用文献的或我们估计的相变潜热值,得到两个环状化合物的气态生成热.按照键能模式估计了这两个化合物的环张力能,分别为(2)-0.2±1.5和(3)5.6±0.4kcal/mol,并与其它环状化合物的环张力能进行了比较.

The beats of combustion for(1) hippuric acid(c),(2) piperazine(c)and(3) azaeycloheptane(1) wore dotormined using a precision bomb calorimeter.The results of △H-o and △H0f are:(1)-1008.30±0.22;(2)-707.79±0.27,-9.99±0.27 and(3)-987.03±0.39,-21.36±0.39 kcal/mol,respectively.Using values of latent heat from literature or by estimation,△H0f valuos of these two cyclic compounds wore derived.According to the bond energy achomo,tho conventional ring strain energies for these compounds are estimated to be(2)-0.2±1.5 and(3)+5.6±0.4 kcal/mol,respectivoly,and comparison with thoso of other cyclic compounds is made.