Chemical shifts of the coalesced hydroxy proton resonance signal and departures from ideality in aqueous alcohol mixtures II. Methanol-water, ethanol-water, propanol-1-water, and propanol-2-water systems

Correlations of excess chemical shift of coalesced hydroxy proton resonance signals with reinterpreted thermodynamic data for methanol-water, ethanolwater, propanol-l-water, and propanol-2-water systems were consistent with those reported for the tert-butanol-water system (Paper I of this series). In all cases there was evidence that the greatest degree of solution structuring occurred at low concentrations of alcohol. It was proposed that phase separation at low alcohol concentrations in other aqueous systems of monohydric alcohols may be associated with a molecular geometry which interferes with this solution structuring factor.