Infrared spectra of the hydrogen-bonded pi complex C2H4–HF in solid argon
- 15 June 1982
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 76 (12) , 5767-5773
- https://doi.org/10.1063/1.442973
Abstract
The hydrogen‐bonded pi complex C2H4‐‐HF has been prepared by codeposition of C2H4 and HF with excess argon at 12 K. Isotopic substitution in both submolecules identified the complex and provided assignments to νs at 3731 cm−1, νl at 424 and 396 cm−1, and ν7c at 973 cm−1. The observation of a substantial perturbation on the out‐of‐plane bending mode of the C2H4 submolecule in the complex without a perturbation on the in‐plane bending mode indicates that H–F is bonded to the pi electron system perpendicular to the plane of the molecule. The positions of νs and νl indicate a hydrogen bond of intermediate strength and the splitting in νl is characteristic of the anisotropy in the hydrogen bonding interaction with a π system.Keywords
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