کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1408263 | 1501913 | 2006 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Raman spectroscopic study of base catalyzed di- and trimerization of malononitrile in ionic liquids and water Raman spectroscopic study of base catalyzed di- and trimerization of malononitrile in ionic liquids and water](/preview/png/1408263.png)
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.
Journal: Journal of Molecular Structure - Volume 799, Issues 1–3, 6 November 2006, Pages 146–152