## Abstract The NMR spectrum of methylenecyclopropane oriented in two nematic phases has been measured at 240 and 400 MHz. Ratios of the protonβproton distances have been obtained. These values are compared with those deduced from the structure of the molecule in the gaseous state; they suggest an
NMR study of bicyclopropylidene in the nematic phase at 400 MHz
β Scribed by J. Courtieu; Y. Gounelle; J. Jullien; J. P. Barnier; J. M. Conia; S. K. Kan
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 220 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0749-1581
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β¦ Synopsis
Abstract
The eight spin NMR spectrum (400 MHz) of bicyclopropylidene oriented in a nematic phase has been analysed. The absolute signs and values of ^5^J(HH) longβrange spinβspin coupling constants have been determined for the first time for this molecule. The ratios of interatomic Hο£ΏH distances have been deduced from the direct coupling constants.
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Proton NhlR spectra of trimethyl acetic acid, dissolved in a bkoic acid type nematic liquid crystal, have been ~meakued and analysed. making use of the hydrogen bonding capabilities of this sort of nematic phase appears to be an excellent method to obtain very high soiute orientations.