MICROWAVE AND RADIOFREQUENCY SPECTRUM OF $Ar\cdot H_{2}S$ BY MOLECULAR BEAM ELECTRIC RESONANCE SPECTROSCOPY
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Date
1979
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Ohio State University
Abstract
Microwave and radiofrequency spectra for the $Ar\cdot H_{2}S$ molecule and its deuterated analogs have been determined by electric resonance spectroscopy of supersonic argon beams seeded with $H_{2}S$. Precise results for (B+C)/2, (B-C)/2, $\mu_{a}, (\mu_{b}{^{2}} + \mu_{c}{^{2}})^{1/2}$ and for nuclear hyperfine interactions have been obtained and will be discussed. One of the most striking results is the small $\mu_{a}$ value for $Ar\cdot H_{2}S$ (0.186 D) and $Ar\cdot D_{2}S (0.17D)$, while the apparent perpendicular electric dipole moment $(\mu_{b}{^{2}} + \mu_{c}{^{2}})^{1/2}$ is 0.8 D for $Ar\cdot H_{2}S$. An hypothetical rigid, linear hydrogen-bonded complex would have $\mu_{a}$ and the perpendicular moment both equal to 0.68D to a first approximation. These results suggest that even in the equilibrium configuration, this molecule is not hydrogen--bonded.
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