Structure Data of Free Polyatomic Molecules
46
MW
Ar3H2O
Å a)
rs
Ar...Ar
3.848(5)
Ar...cm(H2O) 3.675(5)
Water – argon (1/3)
(weakly bound complex)
deg a)
θ ) 74(2)
θs
C3v
(effective symmetry class)
(large-amplitude motion)
H2O · 3Ar
b
The barrier for the pseudorotation in which the
protons hop between the argons is determined
to be about 6 cm–1 making the H2O moiety very
mobile and effectively making the complex a
symmetric top.
a
) Uncertainties were not estimated in the original paper.
) Angle between the C2 axis of the H2O and the C3 axis of the complex.
b
Arunan, E., Emilsson, T., Gutowsky, H.S., Dykstra, C.E.: J. Chem. Phys. 114 (2001) 1242.
Landolt-Börnstein
New Series II/28A