Abstract
Densities ρ, of the binary systems of dimethyl sulfoxide (DMSO) with methanol, ethanol, propan-1-ol, propan-2-ol, butan-1-ol, and butan-2-ol have been measured as a function of the composition of DMSO at 298.15 K and atmospheric pressure, using an Anton Paar model DMA 4500 oscillating U-tube densitometer. From the experimental results, excess molar volumes , and excess partial molar volumes , were calculated. Limiting excess partial molar volumes , are also calculated by extrapolation of partial excess molar volumes to infinite dilution. The excess molar volumes are negative for methanol, ethanol, propan-1-ol and positive for propan-2-ol, butan-1-ol, and butan-2-ol in the entire composition range. The results are explained in terms of aggregates between unlike molecules through O ··· HO hydrogen bonding.
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