The sign and magnitude of the reduced coupling constant between nitrogen and hydrogen in a solution containing partially deuteriated ammonium bromide have been determined by heteronuclear double resonance techniques. The reduced coupling constant is shown to be positive relative to a negative value for KHH. Accurate values of the 14N and 1H chemical shifts of the deuteriated ammonium ions are also given.
W. McFarlane and R. R. Dean, J. Chem. Soc. A, 1968, 1535 DOI: 10.1039/J19680001535
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