Chemical shifts of fluorine nuclei in some fluorinated pyridines
Abstract
The magnetic resonance spectra of fluorine nuclei in some tetrafluorinated pyridines are described, and the values of the shift produced by a substituent in pyridines compared with that produced by the same substituent in benzenes. For the substituents F, Cl, and OH the values of the para-substituent shift is compared with π-electron densities, calculated by a SCF–MO method.