The far-infrared vibration-rotation spectrum of the out-of-plane DC1 bending band of Ar2-DCl is observed around 36·0 cm-1. The experimental bending frequency, rotational constants and hyperfine coupling constants are compared with the results of calculations employing both pairwise-additive and non-additive interaction potentials. As found previously for Ar2-HCl, there are substantial discrepancies between the experimental results and calculations employing a pairwise-additive potential. To explain the discrepancy it is necessary to include a non-additive term that arises from the interaction of the permanent multipoles of the DC1 monomer with an overlap-induced quadrupole on Ar2. The new spectra should prove very valuable in a future determination of the non-additive contribution to the potential. © 1994 Taylor & Francis Ltd.
CITATION STYLE
Elrod, M. J., Saykally, R. J., Cooper, A. R., & Hutson, J. M. (1994). Non-additive intermolecular forces from the spectroscopy of van der waals trimers: Far-infrared spectra and calculations on Ar2-DCl. Molecular Physics, 81(3), 579–598. https://doi.org/10.1080/00268979400100391
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