Intramolecular screening effects on nuclear magnetic resonance chemical shifts. Part V. The fluorine-19 magnetic resonance spectra of some bridgehead substituted fluorobicyclo[2,2,1]heptenes

Abstract

The ¹⁹F chemical shifts and geminal fluorine coupling constants for some bridgehead-substituted fluorobicyclo-[2,2,1]heptenes are reported. The F_{7 anti-syn} and F_{5,6 exo-endo} shifts are accounted for in terms of intramolecular electric field contributions to ¹⁹F nuclear screening. Geminal fluorine coupling constants are discussed in relation to skeletal [graphic omitted] angles.