RAMAN-SPECTROSCOPIC STUDY OF THE HYDRATES OF 18-CROWN-6

被引：51
|
作者：
FUKUHARA, K [1 ]
TACHIKAKE, M [1 ]
MATSUMOTO, S [1 ]
MATSUURA, H [1 ]
机构：
[1] HIROSHIMA UNIV,FAC SCI,DEPT CHEM,HIGASHIHIROSHIMA 739,JAPAN
来源：
JOURNAL OF PHYSICAL CHEMISTRY | 1995年 / 99卷 / 21期
关键词：
D O I：
10.1021/j100021a027
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：
The hydrates of 18-crown-6 have been studied by Raman spectroscopy. The analysis of the Raman spectra, in combination with the examination of the liquidus curve, of the 18-crown-6-water system shows the formation of at least four distinct hydrates at liquid nitrogen temperature. The ratios of 18-crown-6 to water for the two hydrates are 1:6 and 1:4.5, and their congruent melting points are 23.7 and 24.0 degrees C, respectively. The conformation of the crown ring in these hydrates is essentially D-3d The 1:6 hydrate agrees with the hexahydrate determined by a recent crystal structure analysis. The 1:4.5 hydrate is suggested to have a hydration structure similar to that predicted by Monte Carlo simulations. The present experimental findings are well correlated to the results of previous computer simulations.
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页码：8617 / 8623
页数：7
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