Structure Data of Free Polyatomic Molecules
505
MW
C4H4ArN2
r0
Z 0 b)
re
Y e c ) d)
Pyrimidine – argon (1/1)
(weakly bound complex)
Å a)
3.484(10)
Cs
(effective symmetry class)
(large-amplitude motion)
N
N
a
Å )
0.27(1)
a
) Uncertainties were not estimated in the original paper.
) Distance of Ar from the plane of pyrimidine.
c
) Shift of Ar from the center of mass of the ring
towards the N atoms.
d
) Equilibrium value.
b
Caminati, W., Favero, P.G., Melandri, S., Meyer, R.: Chem. Phys. Lett. 268 (1997) 393.
Landolt-Börnstein
New Series II/28C
. Ar