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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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📜 SIMILAR VOLUMES


19F NMR of five polyfluoronaphthalenes.
✍ R. S. Matthews 📂 Article 📅 1982 🏛 John Wiley and Sons 🌐 English ⚖ 403 KB

## 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

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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

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✍ R. S. Matthews 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 400 KB

## 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 FF inter‐ring coupling

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✍ R. S. Matthews 📂 Article 📅 1976 🏛 John Wiley and Sons 🌐 English ⚖ 382 KB

## 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 FF coupling constants alternate in sign and magnitude and are positive over an odd number of bonds. They correlate with SCFMO