Adducts of aromatic molecules with rare gases: rotational spectrum of pyrazole–argon Original Research Article

The free jet millimeter wave spectra of normal and N–D isotopomers of pyrazole–argon have been investigated in the 60–78 GHz frequency range. The location of Ar with respect to the aromatic ring and an estimate of the van der Waals stretching force constant and of the dissociation energy are given.