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Through-space hydrogen-fluorine and carbon-fluorine spin-spin coupling in 5-fluoro-3,3-dimetryl-1,2,3,4-tetrahydrophenanthrene

✍ Scribed by Gordon W. Gribble; William J. Kelly

Book ID: 104222440
Publisher: Elsevier Science
Year: 1985
Tongue: French
Weight: 249 KB
Volume: 26
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)89249-7

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✦ Synopsis

The 'H and 13C NMR spectra of the title compound (1) reveal through-space couplings between the fluorine and the C-4 methylene group cfH and 13C), as well as coupling between the fluorine and the C-3 methine carbon and the C-2 methylene carbon.

"Through-Space" or "proximate" spin-spin coupling between fluorine and other magnetic nuclei (lH, 13C, lg F) is firmly established as an NMR phenomenon.' Although it is clear from theoretical studies2 that these interactions--particularly H-F coupling--depend both on

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