The effect of γ-substituents on the vicinal carbon-proton spin-spin coupling constants in aliphatic compounds
✍ Scribed by Tom Spoormaker; Jan W. Zwikker; Marius J. A. de Bie
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 152 KB
- Volume
- 98
- Category
- Article
- ISSN
- 0165-0513
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The increments in ^3^J(CH) for substituents attached to C^γ^ in the ^13^C^α^‐C^β^‐C^γ^‐^1^H coupling pathway, with respect to ^3^J(CH) in propane are calculated for equal C^β^‐C^γ^ rotamer population from ^3^J(CH) observed in the corresponding neopentyl compounds. From these increments the preferred conformation of the n‐propyl compounds can be deduced.
📜 SIMILAR VOLUMES
## Abstract A series of alicyclic compounds with dihedral angles of 0°, 60°, 90°, 120° and 180° between a ^13^C‐labelled 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
## Abstract The magnitude of the NMR spin‐spin coupling constant, ^3^__J__(CH), between a vicinal ^13^C–^1^H pair depends, __inter alia__, on the value of the torsion angle Φ~CH~(^13^CCCH) and is influenced by the presence of an electronegative substituent located on the coupling ^13^C nucleus.