Geometry of a weakly bound complex (H2S, HCN) determined from an investigation of its rotational spectrum
- 1 January 1984
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 80 (12) , 1669-1682
- https://doi.org/10.1039/f29848001669
Abstract
The ground-state rotational spectra of 10 isotopic species of a weakly bound complex formed by H2S and HCN in the gas phase have been investigated by the technique of pulsed-nozzle, Fourier-transform microwave spectroscopy. The following rotational constants, ½(B0+C0), centrifugal distortion constants, DJ, and 14N nuclear quadrupole coupling constants, χaa, have been determined: [graphic omitted] Analysis of the constants ½(B0+C0) shows that they are consistent only with a geometry of the complex in which the HCN molecule acts as a proton donor in forming a hydrogen bond to the S atom of H2S. The S, C and N nuclei are collinear (or nearly so), with r(SC)= 3.8088 Å and with the angle ϕ between the SHCN line and the plane of the H2S subunit equal to 84.5°.Keywords
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