A 19F NMR study of steric hindrance in some contiguously substituted perfluoroalkylpyridines. Empirical 19F shift correlations
β Scribed by R.S Matthews
- Book ID
- 103185555
- Publisher
- Elsevier Science
- Year
- 1978
- Weight
- 693 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0022-2364
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## Abstract Longβrange isotope shifts, ΞΞ΄, due to ^37^Cl/^35^Cl and ^81^Br/^79^Br, in the ^19^F NMR spectra of some substituted benzenes are reported. The shifts appear to be invariant to solvent and are additive when the isotopes are in chemically equivalent positions relative to the fluorine site
The magnitudes and relative signs of 13C-'% and 'H-'% coupling constants in 6-F-indole, 5-and 6-F-tryptamine, 5-F-indole-3-carboxaldehyde, 2and 4-F-biphenyl, droperidol, flusperilene, l-F-naphthalene and 3-F-fluroanthene (F = fluoro) have been determined using two-dimensional % -' H chemical shift c