Structure Data of Free Polyatomic Molecules
142
MW
CHeO2
θ0 [deg]
b
<θa> )
Carbon dioxide – helium (1/1)
(weakly bound complex)
He · 16O12C17O a) He · 16O13C17O a)
71.1(10)
72.1(10)
Cs
(effective symmetry class)
(large-amplitude motion)
CO2 · He
The complex exhibits internal vibrational motions with very large amplitudes, making it
difficult to locate and assign the rotational transitions.
a
) Uncertainties were not estimated in the original paper.
) Average angle between the a axis and the axis of the CO2 monomer, estimated from the
observed 17O nuclear quadrupole coupling constants.
b
Xu, Y., Jäger, W.: J. Mol. Struct. 599 (2001) 211.
Landolt-Börnstein
New Series II/28B