乙醇对超临界CO_2中乙酰乙酸乙酯异构化平衡的影响  

Effect of Ethanol on the Tautomerism of Ethyl Acetoacetate in Supercritical Co_2

作　　者：柯杰[1] 鲁洁[1] 钟明宏 邹蕾[1] 韩布兴[1] 阎海科[1] 

机构地区：[1]中国科学院化学研究所,北京100080

出　　处：《物理化学学报》1997年第4期351-353,共3页Acta Physico-Chimica Sinica

摘　　要：The enol contents and equilibrium constants of the ketcrenol 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.The enol contents and equilibrium constants of the ketcrenol 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.

关 键 词：乙酰乙酸乙酯 异构化 二氧化碳 超临界流体 

分 类 号：O623.624.1[理学—有机化学]