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The near-UV absorption spectra of phenol-dioxane in n-hexane were observed under hydrostatic pressures up to 1480 atm and at 30 °C. With an increase in the pressure, the spectra shift toward the longer wavelength side and the amount of the hydrogen-bonded phenol increases. The equilibrium constant for (Remark: Graphics omitted.) was obtained, and the volume change accompanying the hydrogen-bond formation was estimated to be −3.0–−3.4 cm3/mol.
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Suzuki et al. (1975) studied this question.
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