Conclusions
Fermi resonance is the factor principally responsible for band multiplicity in P=O group stretching vibrations in diethyl ethylphosphonate (ν P=O). Parameters have been determined for the resonating and unperturbed levels.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No, 9, pp. 1987–1991, September, 1977.
The authors wish to thank V. A. Kharlamov who furnished the DEEP used here.
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Fazliev, D.F., Shagidullin, R.R. & Ashrafullina, L.K. Fermi resonance at the P=O group frequency. Russ Chem Bull 26, 1841–1844 (1977). https://doi.org/10.1007/BF00924372
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DOI: https://doi.org/10.1007/BF00924372