Tautomeric equilibrium of ethyl acetoacetate in compressed CO2 + ethanol and CO2 + methanol mixtures
文献类型：期刊论文
| 作者 | Li, ZH; Mu, TC; Jiang, T; Du, JM; Zhao, GY; Zhang, JL; Han, BX; Huang, Y |
| 刊名 | SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
 |
| 出版日期 | 2004-04-01 |
| 卷号 | 60期号:5页码:1055-1059 |
| 关键词 | Compressed Co2 Methanol Ethanol Ethyl Acetoacetate Tautomerism |
| ISSN号 | 1386-1425 |
| DOI | 10.1016/S1386-1425(03)00336-6 |
| 英文摘要 | Tautomerism equilibrium of ethyl acetoacetate (EAA) in compressed CO2 + methanol and CO2 + ethanol mixtures was studied by UV-Vis spectroscopy at 308.15 K and different pressures. The volume expansion coefficient (alpha) of the solvents at different pressures was also determined. The relative permittivity (epsilon) of CO2 + methanol and CO2 + ethanol mixtures at different conditions was calculated using the K-c and Onsager solvent parameter. The equilibrium constant (K-c) of EAA in the binary mixtures increases considerably with increasing pressure or volume expansion coefficient. The relative permittivity or the polarity of the binary mixtures decreases sharply with increasing volume expansion coefficient in the range of 0 < alpha < 1.5. However, as the volume expansion coefficient exceeds 1.5, the relative permittivity decreases slowly. In other words, the dissolution of CO2 in the polar solvents can reduce the polarity of the solvents significantly in the low volume expansion coefficient range, and the polarity of the solution is not sensitive to the volume expansion coefficient as its value is large enough. The difference in polarity of the two solvents reduces with increasing pressure and becomes negligible after volume expansion coefficient exceeds about 2.5. (C) 2003 Elsevier B.V. All rights reserved. |
| 语种 | 英语 |
| WOS记录号 | WOS:000221206300007 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/55737]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Han, BX |
| 作者单位 | Chinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, ZH,Mu, TC,Jiang, T,et al. Tautomeric equilibrium of ethyl acetoacetate in compressed CO2 + ethanol and CO2 + methanol mixtures[J]. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,2004,60(5):1055-1059. |
| APA | Li, ZH.,Mu, TC.,Jiang, T.,Du, JM.,Zhao, GY.,...&Huang, Y.(2004).Tautomeric equilibrium of ethyl acetoacetate in compressed CO2 + ethanol and CO2 + methanol mixtures.SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,60(5),1055-1059. |
| MLA | Li, ZH,et al."Tautomeric equilibrium of ethyl acetoacetate in compressed CO2 + ethanol and CO2 + methanol mixtures".SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 60.5(2004):1055-1059. |
入库方式： OAI收割
来源：化学研究所
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