12-CROWN-4 ETHERS - SOLID-STATE STEREOCHEMICAL FEATURES OF DIBENZO-12-CROWN-4, DERIVED DICYCLOHEXANO-12-CROWN-4 ISOMERS, AND A LITHIUM THIOCYANATE COMPLEX AS DETERMINED VIA C-13 CPMAS NUCLEAR-MAGNETIC-RESONANCE AND X-RAY CRYSTALLOGRAPHIC METHODS

被引：22

作者：

BUCHANAN, GW ^{[1
]}

KIRBY, RA ^{[1
]}

CHARLAND, JP ^{[1
]}

RATCLIFFE, CI ^{[1
]}

机构：

[1] NATL RES COUNCIL CANADA,DIV CHEM,OTTAWA K1A 0R9,ONTARIO,CANADA

来源：

JOURNAL OF ORGANIC CHEMISTRY | 1991年 / 56卷 / 01期

关键词：

D O I：

10.1021/jo00001a040

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Solid-phase C-13 NMR spectra are presented for the title systems. For dibenzo-12-crown-4, cis-anti-cis-dicyclohexano-12-crown-4, and the LiNCS complex of the cis-syn-cis isomer, asymmetric units derived from the NMR data are consistent with single-crystal X-ray data. In the uncomplexed cis-syn-cis isomer, intermolecular crystal packing effects are shown to render intramolecularly equivalent carbons nonequivalent. Some factors contributing to the C-13 steric shifts in these molecules are discussed.

引用

页码：203 / 212

页数：10

共 29 条

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