Unusual conformationally dependent substituent effects upon the 13C chemical shifts of β alkyl carbons of phenylalkanes.
✍ Scribed by W.F. Reynolds; R.H. Kohler; G.K. Hamer
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- French
- Weight
- 399 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
An inverse substituent dependence (i.e. NO, derivative to high field of NH,) has been noted for the methyl 13C chemical shifts for a series of
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The 13C NMR spectra have been determined of: (i) aliphatic compounds having at one end a functionalized sulphur atom (-SH, -S-, -SMe, -S(O)Me, -SO,Me and -S-'Me,) and (ii) saturated sulphur heterocycles variously substituted at the S-atom (\S, \SO '\SO, and 'xS Me). The results are discussed in term
A reverse __ortho__ effect is observed for the ^13^ C NMR chemical shifts of the carboxyl carbon (__δ__~co~) in benzoic acids measured in aprotic solvents of varying polarity. The __ortho__ effect on __δ__~co~ is best described by a combination of the reverse field and steric accelerating effects of