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- W1972139744 abstract "This paper is devoted to IR spectroscopic studies in polarized light of hydrogen bond systems in 3-hydroxypyridine crystals. These investigations were preceded by re-determination of the 3-hydroxypyridine X-ray structure; in contrast to the previous report, no significant differences were observed between the two independent molecules. Polarization spectra of 3-hydroxypyridine crystals were measured in the frequency ranges of νO–H and νO–D bands at the room temperature, and also at the temperature of liquid nitrogen, for the “ac” crystalline face. Investigations of the “residual” νO–H band shapes for crystals that were diluted by deuterium revealed characteristic changes in the “residual” band shape, indicating an essentially random distribution of protons and deuterons between the hydrogen bonds in the lattice and ruling out the so-called “self-organization” isotopic effects, which are an attribute of some crystalline systems involving chains of hydrogen bonds in their lattices. The random distribution of the protons and deuterons in the crystal is ascribed to disappearance of effective coupling of the hydroxyl group proton and deuteron movements with the pyridine ring π- electrons, which seems to be the reason for the particular spectral behavior of the 3-hydroxypyridine crystal." @default.
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- W1972139744 date "2003-12-01" @default.
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- W1972139744 title "Distribution of hydrogen isotopes in proton and deuteron mixtures in open-chain hydrogen bond systems: polarization IR spectra of 3-hydroxypyridine crystals" @default.
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- W1972139744 doi "https://doi.org/10.1016/j.vibspec.2003.08.003" @default.
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