Equilibrium in the Exchange of Deuterium between Ammonia and Hydrogen

Abstract
Equilibrium in the reaction NH3(g)+HD(g)=NH2D(g)+ H2(g) was measured in the temperature range 210°K to 295°K. The results may be expressed by the relation K=0.972 exp 509/T. The zero‐point energy difference between NH3 and NH2D is calculated to be 635±3 cm−1.