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Citation: 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 Physico-Chimica Sinica, ;1997, 13(04): 351-353. doi: 10.3866/PKU.WHXB19970412 shu

Effect of Ethanol on the Tautomerism of Ethyl Acetoacetate in Supercritical CO₂

1.
Institute of Chemistry,Academia Sinica,Beijing 100080,China

Received Date: 9 September 1996
Available Online: 15 April 1997

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.
- Supercritical CO₂,
- Ethyl acetoacetate,
- Tautomerism,
- Cosolvent,
- Cluster
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Effect of Ethanol on the Tautomerism of Ethyl Acetoacetate in Supercritical CO2

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Effect of Ethanol on the Tautomerism of Ethyl Acetoacetate in Supercritical CO₂