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Nuclear Quadrupole Resonance and Stereochemistry I. α – Chloro ethers

✍ Scribed by Ziba Ardalan; Edwin A. C. Lucken

Book ID
102251435
Publisher
John Wiley and Sons
Year
1973
Tongue
German
Weight
312 KB
Volume
56
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

^35^Cl nuclear quadrupole resonance spectra of cyclic α‐chloro ethers of known configuration are presented. The resonance frequencies of chlorine atoms in equatorial positions are in every case some 2.5 MHz higher than those of corresponding chlorine atoms in axial positions. Similar results are obtained for open‐chain trichloromethyl ethers and the effect is sufficiently well‐defined to distinguish between configurational isomers and establish their conformation. These results may be rationalised in terms of a model in which the lone‐pair electrons on the oxygen atom hyperconjugate with the electrons of the CCl bond.

📜 SIMILAR VOLUMES

Nuclear Quadrupole Resonance and Stereoc
Nuclear Quadrupole Resonance and Stereochemistry III. Trichloromethyl derivatives
✍ Ziba Ardalan; Edwin A. C. Lucken 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 German ⚖ 385 KB

## Abstract ^35^Cl nuclear quadrupole resonance frequencies are reported of the chlorine atoms in the trichloromethyl group of benzotrichlorides and trichloromethyl derivatives of heterocyclic molecules. They are compared with previously reported results for the same group attached to other planar

Nuclear Quadrupole Resonance and Stereoc
Nuclear Quadrupole Resonance and Stereochemistry II. Vicinal cis- and trans-dichloro derivatives of carbocyclic systems
✍ Ziba Ardalan; Edwin A. C. Lucken; S. Masson 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 German ⚖ 313 KB

## Abstract The ^35^Cl quadrupole resonance frequencies of sets of isomeric vicinal dichloro derivatives of carbocyclic molecules are presented. In all cases except one – __cis__‐ and __trans__‐1, 2‐dichloro‐acenaphthene – the configuration has only a small effect on the resonance frequency. This i