Long-Range N14 Coupling in Ethyl Ammonium Ions

There has been considerable interest recently in the magnitudes and relative signs of CH3-X and CH2-X coupling constants in compounds of the type (CH3CH2)nX [2-6]. We wish to report the analysis of the spectra of N(CH2CH3)4+ and N(C2H5)3(CH2SCH3)+ and the confirmation of the assignments of these spectra by H1-{N14} [1] double resonance and by the temperature dependence of the proton spectra.