## Abstract The chemical shift nonβequivalence of the methylene protons adjacent to the quaternary nitrogen in compounds of the type has been investigated. The behaviour of the examined compounds is interpreted in terms of different rotation rates around the three Cο£ΏN^β^ bonds. The vicinal and gem
Factors contributing to the chemical shift of protons adjacent to nitrogen in piperidines
β Scribed by Joseph B. Lambert; Robert G. Keske
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- French
- Weight
- 242 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
The shielding of an axial proton by an adjacent, axial lone pair on nitrogen was first No. 25
π SIMILAR VOLUMES
A previous model for the calculation of proton chemical shifts in substituted alkanes based upon partial atomic charges and steric interactions has been modiΓed by the replacement of the CΓC bond anisotropy term with an orientation-dependent c e β ect (i.e. C Γ C Γ C Γ H). The new scheme (CHARGE5) pr
1998 magnetic resonance, nuclear quadrupole resonance magnetic resonance, nuclear quadrupole resonance (organic substances) K 2560 ## 09 -012 Proton Chemical Shifts in NMR. Part 10. Bromine and Iodine Substituent Chemical Shifts (SCS) and an Analysis of the Contributions to the SCS in Halocyclohex