The original observation that axial protons in cyclohexane and pyran systems absorb at higher p.m.r. fields than their equatorial counterpartsla has been followed by numerous similar reports, and has been stated in the form of a general rule.lb In contrast, Williamson and Johnson noted that the axia
Determination of the difference in shielding by protons in water and hydrogen and an estimate of the absolute shielding by protons in water
β Scribed by Yu. I. Neronov, N. N. Seregin
- Book ID
- 120749851
- Publisher
- Springer US
- Year
- 2013
- Tongue
- English
- Weight
- 162 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0543-1972
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
## Abstract The coefficients which determine the electric field dependence at first and second order of the shielding of protons in Cο£ΏH bonds were calculated by a finiteβfield SCF method for the molecules, CH~4~, C~2~H~6~, CH~3~F, CH~3~Cl, CH~3~CN, C~2~H~4~, H~2~CO, HCN and C~2~H~2~. Values are giv
From the theory of chemical shifts, substituent-induced ring proton shifts should depend primarily on the n-electron charge density of the carbon atom to which the proton is bound assuming substituent-independence of the ring current effect and minimal long range substituent effects for meta and par