- 作者: 林繼雄; 李明淑
- 作者服務機構: 國立成功大學化學系
- 中文摘要: 克勞修士-克拉培侖式係數,依理想化的理論上可以Lv/R表示。今為設立現實物質之沸點換算式,以用於電腦檢索系統上,乃就四百多種有機化合物施行統計研究。其結果顯示,己知融點之物質可先以C'═9.884MP十4129.2 式求得初步的標準沸點 BP',然後依 C═13.78(BP'十0.25MP)-1104.3 式求此值。對未知融點者,則先設 C'═7000以求BP',再以14.OBP'-223.6求之則可。本文中所用以考察的化合物共414種其中有明確標準沸點者356種,而沸點觀測壓力在 5torr 以上者共325種。這些類組分別施行統計計算而比較其結果。另亦檢討標準沸點之推算偏差對觀測壓力及對沸點的分佈情祝。前者指示,在電腦檢索時之標準融點尋查上,可設土40° exp [10(1-△P)〕之許容範圍。而後者則指示,以C'═7000, C'═14.OBP'-223.6 所做的推算法,宜再對算得的標準沸點作一補正。此補正式為BP═1.077BP°-38.2
- 英文摘要: The coefficient Lv/R in the Clausius-Clapeyron formula is studied forfour hundred compounds in relation to their boiling points, melting points,and pressures of measurement. A general, method for estimating the stand-and boiling point is obtained statistically specially for the purpuse of cons-tructing a computer retrieval system of chemical materials based on propertydescriptors. With this method, initial estimation of standard boiling pointis made with the coefficient value C'═9.884MP+4129.2 or C′═7000. This es-timated value, BP'. is then used for the final estimation through C═13.78(BP'+0.25MP)-1104.3 or C═14.0 BP'-223.6, respectively. In the actual com-puter retrieval, it is proposed to adopt士40 exp 10(1一△P) as the range ofsearch for standard boiling point.
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