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Acta Physico-Chimica Sinica  1997, Vol. 13 Issue (04): 351-353    DOI: 10.3866/PKU.WHXB19970412
Note     
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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Abstract  

 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.



Key wordsSupercritical CO2      Ethyl acetoacetate      Tautomerism      Cosolvent      Cluster     
Received: 09 September 1996      Published: 15 April 1997
Corresponding Authors: Han Bu-Xing   
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. Acta Physico-Chimica Sinica, 1997, 13(04): 351-353.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB19970412     OR     http://www.whxb.pku.edu.cn/Y1997/V13/I04/351

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