C-13 NUCLEAR-MAGNETIC-RESONANCE SPECTRA IN THE SOLID-STATE OF 18-CROWN-6.NANCS.H2O, SOME DICYCLOHEXYL-18-CROWN-6 ETHERS, AND THEIR COMPLEXES WITH PHENOXIDES AND PHENOL

被引：16
作者：
BUCHANAN, GW
KHAN, MZ
RIPMEESTER, JA
BOVENKAMP, JW
RODRIGUE, A
机构：
[1] NATL RES COUNCIL CANADA,DIV CHEM,OTTAWA K1A 0R9,ONTARIO,CANADA
[2] DEF RES ESTAB,OTTAWA K1A 0Z4,ONTARIO,CANADA
来源：
CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE | 1987年 / 65卷 / 11期
关键词：
Configurationally - Dicyclohexyl-18-crown-6 - Ether structure - High resolution - Stereochemical effects - Symmetry properties - Temperature reduction - Torsional angle;
D O I：
10.1139/v87-426
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
High resolution 13C CPMAS spectra for three configurationally isomeric dicyclohexyl-18-crown-6 ethers and three complexes derived therefrom are presented. Spectra are consistent with conformationally locked crown ether structures at 298 K. Data are discussed in terms of the symmetry properties of the macrocycles and stereochemical effects on 13C chemical shifts in the solid phase. For the complex of 18-crown-6 with NaSCN and H2O, a single line is observed at 298 K. Temperature reduction removes the chemical shift averaging as the different torsional angles of the solid crown ether undergo distortions that become slow on the nuclear magnetic resonance timescale. Copyright © 2014 - Canadian Science Publishing.
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页码：2564 / 2567
页数：4
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