The liquid structure of 1:1 and 2:1 molar mixtures of 2,2,2-trifluoroethanol (TFE) and dimethyl sulfoxide (DMSO) has been investigated by X-ray diffraction at 25°C. The nearest neighbor structure in the mixtures involves the OH...O type H-bonds between TFE and DMSO molecules besides the relatively long-range intermolecular ordering, which is characteristic of both pure TFE and DMSO, in their mixtures. The long-range interactions may arise from H-bonding between TFE and DMSO clusters, both consisting of a few molecules of each component liquid. No evidence was found for the short-range interaction between the S atom of DMSO and the O atom of TFE.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry