ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 1997,Vol.13>> Issue(04)>> 351-353     doi: 10.3866/PKU.WHXB19970412         中文摘要
Effect of Ethanol on the Tautomerism of Ethyl Acetoacetate in Supercritical CO2
Ke Jie,Lu Jie,Zhong Ming-Hong,Zou Lei,Han Bu-Xing,Yan Hai-Ke
Institute of Chemistry,Academia Sinica,Beijing 100080,China
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 The enol contents and equilibrium constants of the keto-enol tautomerism of ethyl acetoaretate were determined in various solvents using UV spectroscopy. It was found that in supercritical CO2 the enol content decreases dramatically in the presence of 0.047mol?L-1 ethanol. In liquid cyclohexane, however, the effect of the same amount of ethanol on enol content is not detectable. The strong cosolvent effect in SC CO2 results from the clustering of the cosolvent around the solute.

Keywords: Supercritical CO2   Ethyl acetoacetate   Tautomerism   Cosolvent   Cluster  
Received: 1996-09-09 Accepted: 1996-10-14 Publication Date (Web): 1997-04-15
Corresponding Authors: Han Bu-Xing Email:

Cite this article: Ke Jie,Lu Jie,Zhong Ming-Hong,Zou Lei,Han Bu-Xing,Yan Hai-Ke. Effect of Ethanol on the Tautomerism of Ethyl Acetoacetate in Supercritical CO2[J]. Acta Phys. -Chim. Sin., 1997,13 (04): 351-353.    doi: 10.3866/PKU.WHXB19970412
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