Abstract
14N and 2H nuclear quadrupole resonance of a hydrogen-bonded pyrrole-pyridine (1:1) complex were observed at 77 K by field cycling double resonance. The intemuclear nitrogen-nitrogen distance was estimated at 2.92 Å based upon an empirical correlation between deuterium quadrupole coupling constants and hydrogen-bond geometry. The effect of hydrogen bonding on the 14N electric field gradient tensors was also evaluated; substantial charge transfer through the hydrogen bond was observed.
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