Binary systems of acetone with tetrachloroethylene, trichloroethylene, methylene chloride, 1,2-dichloroethane and cyclohexane. Part 3.—Dielectric properties and refractive indices at 303.15 K
- 1 January 1985
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 81 (1) , 11-19
- https://doi.org/10.1039/f29858100011
Abstract
Measurements of dielectric constants, ε, and refractive indices, n, have been made for binary liquid mixtures of acetone with tetrachloroethylene (CCl2CCl2), trichloroethylene (CHCĺCCl2), methylene chloride (CH2Cl2), 1,2-dichloroethane (CH2ClCH2Cl) and cyclohexane (c-C6H12) at 303.15 K. Values of the quantity Δε, which refers to the deviations of experimental values of the dielectric constants of the mixtures from values arising from the law of the ideal-volume-fraction mixtures, have been calculated. The positive values of Δε for acetone + CH2ClCH2Cl and acetone + CH2Cl2 and very slightly negative values of Δε for acetone + CHClCCl2 are attributed to the formation of molecular complexes of acetone with CH2ClCH2Cl, CH2Cl2 and CHClCCl2. The values of the equilibrium constant, Kf, for the formation of 1:1 complexes of acetone with CH2ClCH2Cl, CH2Cl2 and CHClCCl2 have also been calculated, using the dielectric-constant data. The values of the apparent dipole moments µapp of acetone at various mole fractions in the solvents c-C6H12 and CCl2CCl2 have also been calculated. The values of µ2 app suggest that there exists a specific interaction between acetone and CCl2CCl2.Keywords
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