Conformational studies on 2??fluoro??1, 2??disubstituted ethanes by NMR spectroscopy. Influence of electronegativity on vicinal proton–proton and fluorine–proton …

…, C Béguin, C Charlon, C Luu??Duc

Index: Hamman, Sylvain; Beguin, Claude; Charlon, Claude; Luu-Duc, Cuong Organic Magnetic Resonance, 1983 , vol. 21, # 6 p. 361 - 366

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Citation Number: 20

Abstract

Abstract The analysis of the ABKX spectra of thirteen compounds of the series RC (HK)(FX) C (HA)(HB) X gave the four vicinal proton-proton and fluorine-proton coupling constants. These coupling constants of conformationally mobile structures were used (i) to calculate the populations of the rotational states of the [BOND] CHF [BOND] CH 2 [BOND] bond,(ii) to calculate the vicinal trans proton-proton J (HH) t and gauche and trans fluorine-proton ...