## Abstract Analyses of the ^19^F and ^1^H spectra of 1,2,3,4,5‐pentafluoro‐, 1‐bromo‐4,5,6,7,8‐pentafluoro‐, 1,2,3,4,5,6‐hexafluoro‐, and 1‐bromo‐3,4,5,6,7,8‐hexafluoro‐naphthalene are presented, and it is observed that the Fermi contact mechanism does not, simply, account for the long range coupl
Determination and application of values of inter-ring F,F coupling constants
✍ Scribed by R.S Matthews
- Publisher
- Elsevier Science
- Year
- 1978
- Weight
- 786 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0022-2364
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## Abstract The signs and magnitudes of every fluorine–fluorine coupling constant in perfluoroquinoline (**1**), 2,4‐dichloropentafluoroquinoline (**2**) and 2‐bromohexafluoroquinoline (**3**) have been determined by ^19^F n.m.r. These provide an unambiguous assignment of the spectrum of the first
## Abstract The ^19^F n.m.r. spectrum of hexafluoroquinazoline has been analyzed giving the signs and magnitudes of all but two of the coupling constants, and supporting the analyses of the ^19^F n.m.r. spectra of heptafluoroquinoline and heptafluoroisoquinoline. Long range FF inter‐ring coupling
## Abstract An analysis of the ^19^F n.m.r. spectra of heptafluoroisoquinoline and hexafluoro‐1‐methoxyisoquinoline is presented. As in heptafluoroquinoline, the inter‐ring FF coupling constants alternate in sign and magnitude and are positive over an odd number of bonds. They correlate with SCFMO