Abstract
In 1941 Ketelaar1 published accurate measurements on the infra-red absorption and reflexion spectra of potassium hydrogen fluoride (KHF2). The two strong peaks of 1450 and 1222 cm.â1 were interpreted as a doubling of the fundamental asymmetric valence frequency v3 belonging to the vibration of a proton between two Fâ ions. The doubling was assumed to be caused by a double-minimum potential curve of the type occurring in the NH3 molecule. The splitting of the lowest vibrational level was estimated to be 25 cm.â1 and the distance between the two equilibrium positions 0.70 A.
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References
Ketelaar, J. A. A., Rec. Trav. Chim., 60, 523 (1941).
Dennison, D. M., and Uhlenbeck, G., Phys. Rev., 41, 313 (1932).
Van Vleek, J. H., "The Theory of Electric and Magnetic Susceptibilities" (Oxford, 1932).
Pitzer, K. S., and Westrum, E. F., J. Chem. Phys., 15, 526 (1947).
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POLDER, D. Nature of the Hydrogen Bond in Potassium Hydrogen Fluoride. Nature 160, 870â871 (1947). https://doi.org/10.1038/160870a0
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DOI: https://doi.org/10.1038/160870a0
