Conclusions
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1.
In the vibrational spectra of dibutyl and diisobutyl phosphite (DBP and DIBP respectively), variations in medium, temperature, and phase state give rise to concurrent intermolecular interactions and conformational effects which are reflected in the frequencies and integral intensities of ν(P-H) and ν(P=O).
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2.
In the series dimethyl phosphite, diethyl phosphite, DBP, and DIBP the conformational equilibrium shifts in the direction of less gauche-gauche molecules, the dipole-dipole association is reduced and the proton-donor ability of the P-H group in a hydrogen bond is increased.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1282–1285, June, 1989.
The authors wish to thank S. A. Tarent'eva for making available the pure samples.
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Shagidullin, R.R., Ashrafullina, L.K., Monakhova, N.I. et al. Spectroscopic study of compounds with P-H bonds 1. Dibutyl- and diisobutyl phosphites. Russ Chem Bull 38, 1167–1170 (1989). https://doi.org/10.1007/BF00957147
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DOI: https://doi.org/10.1007/BF00957147