Raman spectroscopic study of base catalyzed di- and trimerization of malononitrile in ionic liquids and water

被引：13

作者：

Lopez-Pastor, Mercedes

Dominguez-Vidal, Ana

Ayora-Canada, Maria Jose

Valcarcel, Miguel

Lendl, Bernhard

机构：

[1] Vienna Univ Technol, Inst Chem Technol & Analyt, A-1060 Vienna, Austria

[2] Univ Cordoba, Dept Analyt Chem, E-14071 Cordoba, Spain

[3] Univ Jaen, Dept Phys & Analyt Chem, E-23071 Jaen, Spain

来源：

JOURNAL OF MOLECULAR STRUCTURE | 2006年 / 799卷 / 1-3期

关键词：

2D Correlation Spectroscopy; Multivariate Curve Resolution; Raman spectroscopy; ionic liquids; malononitrile;

D O I：

10.1016/j.molstruc.2006.03.004

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Multivariate Curve Resolution (MCR) and Two-Dimensional Correlation Spectroscopy (2DCoS) have been employed to analyze the Raman spectra recorded from the reaction of malononitrile with KOH carried out in the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate and water. In both cases the carbanion, which is formed by deprotonation of malononitrile, could be detected spectroscopically. When using the ionic liquid as solvent formation of the dimer was observed, whereas in aqueous solution a trimer was formed by a subsequent Michael addition. Based on the component spectra and concentration profiles obtained from MCR analysis the reaction intermediates as well as products could be identified. 2DCoS was very helpful in corroborating these results. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：146 / 152

页数：7

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