The 'H N M R spectra of some aryl-and heteroaryl-substituted methylenemalonaldehydes were measured and analysed. The long-range proton-proton spin-spin coupling constants were used to estimate the conformational behaviour of the aryl group relative to the vinyl and aldehyde groups. The compounds ser
✦ LIBER ✦
A molecular-orbital study of the ortho-benzylic long-range proton-proton coupling constants 4JHH in biological phenethylamines
✍ Scribed by Claude Giessner-Prettre; Bernard Pullman
- Publisher
- Elsevier Science
- Year
- 1975
- Weight
- 307 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0022-2364
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## Abstract The additivity of chloro and hydroxy substituent effects on the formyl proton spin‐spin coupling constants with the __meta__ ring proton, ^5^__J__(HH), has been tested with 15 chlorinated benzaldehydes and hydroxybenzaldehydes by multiple linear regression analysis. No general additivit