Conformational dependence of vicinal hydrogen-nitrogen-carbon-hydrogen coupling constants in peptides
β Scribed by Barfield, Michael.; Gearhart, Harry L.
- Book ID
- 126141617
- Publisher
- American Chemical Society
- Year
- 1973
- Tongue
- English
- Weight
- 365 KB
- Volume
- 95
- Category
- Article
- ISSN
- 0002-7863
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π SIMILAR VOLUMES
## Abstract Theoretical calculations of the heteronuclear vicinal coupling constant ^3^__J__(^13^Cβ²NC^Ξ±^H) in peptides have been carried out using the Dirac vector model. The results showed an angular dependence for this coupling constant, which can be expressed in the form ^3^__J__(^13^Cβ²NC^Ξ±^H) =
A theoretical study is presented of the dependence on the hydroxymethyl group conformation of vicinal carbon-proton coupling constant 3Jc, n in a series of 16 hexopyranoses. Calculated 3Jc, H values for both anomers of o-glucopyranose (1), D-mannopyranose (2), D-allopyranose (3), D-altropyranose (4)
## Abstract A series of alicyclic compounds with dihedral angles of 0Β°, 60Β°, 90Β°, 120Β° and 180Β° between a ^13^Cβlabelled carbon atom and a carbon atom separated by three bonds from the label has been synthesized. The vicinal ^13^C^13^C spin coupling constants were measured, and from the results a K