✦ LIBER ✦
Long-range proton–proton spin–spin coupling constants in some aryl-substituted methylenemalonaldehydes. Conformational dependence of meta- and ortho-benzylic couplings in styrenoic systems
✍ Scribed by E. Kolehmainen; R. Laatikainen; V. Král
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- English
- Weight
- 618 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
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 serve as model compounds for styrenoic systems, and models for the conformational dependences of the ortho-and metu-benzylic couplings are given.
KEY WORDS 'H NMR long-range coupling constants Styrenoic systems Conformational analysis