Rotational spectrum of the pentafluoroethane-argon van der Waals complex

Abstract Rotational spectra of the van der Waals complex of pentafluoroethane-argon and its two 13 C isotopes in nature abundance have been investigated by puled jet Fourier transform microwave spectroscopy. The Ar atom lies in the symmetry plane of pentafluoroethane, with a distance of 4.05 A from its center of mass. The dissociation energy has been estimated to be 3.2 kJ/mol with a pseudodiatomic approximation.