Sign reversal of geminal 13CH3—C—15N coupling in configurationally isomeric fragments
- 1 May 1977
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 55 (9) , 1437-1439
- https://doi.org/10.1139/v77-201
Abstract
The signs of geminal 15N—C—13CH3 couplings in configurationally isomeric acetophenone oximes have been determined relative to those of the vicinal 15N—C—C—H interactions using an off resonance proton decoupling technique. In the Z-isomer where the nitrogen lone pair is cis to the coupled carbon, the coupling is large and negative, whereas in the E-isomer, the geminal 15N—C—13CH3 coupling is small and positive in sign.Keywords
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