RECENT publications on the conformational equilibrium constants and associated conformational free energy or enthalpy differences' of methoxyl, 2 carbethoxy13 and acetoxyl, 4. obtained by chemical methods, and of the sulfhydryl grou~,~ obtained by infrared spectroscopy, prompt us to record values of
Conformational analysis of some acyclic systems by nuclear magnetic resonance spectroscopy
β Scribed by Fritz Schweinsberg; James G. Traynham
- Publisher
- Elsevier Science
- Year
- 1970
- Tongue
- French
- Weight
- 207 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
1n connection with another study,' we prepared some 1,2-dihalo-, 1,3-dihalo-, and 1,2,3trihalo-2,3-dimethylbutanes (I-III, X = Cl or Br). The nuclear magnetic resonance (nmr) spectra of these compounds reveal a surprising degree of conformational preference about C-C single bonds, such a preference, in fact, that the spectra are those one would expect with single conformations for each compound. We believe that some of the features of the conformational analysis of these compounds are of general interest.
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