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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

1985; Royal Society of Chemistry; Volume: 81; Issue: 1 Linguagem: Inglês

10.1039/f29858100011

2050-5663

Jagan Nath, Atma Prakash Dixit,

Chemical and Physical Properties in Aqueous Solutions

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 µ2app suggest that there exists a specific interaction between acetone and CCl2CCl2.