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Structure Data of Free Polyatomic Molecules
273
MW
H 4N 2O 3
r0
Rcm
N...H b)
N...N
Nitric acid – ammonia (1/1)
(weakly bound complex)
Å
3.323(5) a)
1.736(63)
3.344(12)
θ0
deg
β ) –1(9)
ψ c) 54(4)
γ c) 21(3)
Cs
(effective symmetry class)
(large-amplitude motion)
HNO3 · NH3
c
The observed spectra are consistent with a hydrogen-bonded
structure having a planar arrangement of the heavy atom
frame and a linear or near-linear hydrogen bond involving
the HNO3 proton and the lone pair on the ammonia.
a
) Uncertainty was not estimated in the original paper.
) Hydrogen-bond distance between N atom of the ammonia and H atom of the HNO3.
c
) See figure for the definition.
b
Ott, M.E., Leopold, K.R.: J. Phys. Chem. A 103 (1999) 1322.
Landolt-Börnstein
New Series II/28A