Abstract
Hydrogen bonding between phenol and alkyl thiocyanates, dissolved in carbon tetrachloride, has been studied by means of infrared spectroscopy. The appearance of a new OH stretching vibration band, about 150 cm −1 lower than that of free phenol, clearly indicates the formation of the hydrogen bond in this system. Using an empirical relation between the concentration of phenol and the intensity of the free OH stretching vibration band, the equilibrium constants have been determined over the temperature range 20–50°C. From these, the heats of bonding (2.9–4.1 kcal mol ) and the entropy changes (7–11 e.u.) have been obtained.
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