The mutual electronic interactions between electron-withdrawing and -releasing substituents and the 2,3,5,6-tetrafluoropyridyl system are evaluated from the electric dipole moments of 13 4-substituted 2,3,5,6-tetrafluoropyridines in benzene. The effect of dioxane on some of the solutes is discussed.
S. G. Ang and H. Huang, J. Chem. Soc., Perkin Trans. 2, 1986, 1407 DOI: 10.1039/P29860001407
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