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Stereochemical aspects of proton chemical shifts. II The influence of the hydroxyl substituent on the chemical shift of the ring protons in cyclohexane derivatives.

✍ Scribed by D. Danneels; M. Anteunis

Publisher
Elsevier Science
Year
1975
Tongue
French
Weight
195 KB
Volume
16
Category
Article
ISSN
0040-4039

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Stereochemical aspects of proton chemica
Stereochemical aspects of proton chemical shifts—IV: The cumulative nature of the geminal proton shift influenced by long chain substituents
✍ Dirk Danneels; Marc Anteunis 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 292 KB 👁 1 views

## Abstract Substituent shift effects on geminal protons are consistent with cumulative α‐, β‐ and γ‐effects of a long chain substituent, e.g. whereby not only the first, but also the subsequent β‐ and γ‐atoms of the sidechain should be taken into consideration. These shift contributions depend on

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## Abstract The ^1^H NMR chemical shifts of some hydroxy, methoxy or methyl substituted __trans__‐decalins, __trans__‐1, 3‐dioxadecalins and cyclohexanes are reported. It is concluded that the replacement in a g^+^g^+^ HCCCH fragment of one hydrogen by hydroxy, methoxy or methyl results in a mo

Stereochemical aspects of proton chemica
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## Abstract It is shown that the proton chemical shift may be predicted with fairly good precision for a proton in an ethano fragment carrying a (long) vicinal substituent. Caution must be used however in calculating geminal effects.