THE DIELECTRIC CONSTANTS OF BINARY MIXTURES. V THE ELECTRIC MOMENTS OF CERTAIN ORGANIC MOLECULES IN CARBON DISULFIDE AND HEXANE SOLUTION

1928 ◽  
Vol 50 (1) ◽  
pp. 94-101 ◽  
Author(s):  
John Warren Williams ◽  
Earl F. Ogg
Keyword(s):  
Binary Mixtures ◽  
Carbon Disulfide ◽  
Organic Molecules ◽  
Dielectric Constants ◽  
Hexane Solution

Properties relating to critical phenomena in the acetic anhydride – acetone – carbon disulfide system

1970 ◽  
Vol 48 (6) ◽  
pp. 904-909 ◽  
Author(s):  
A. N. Campbell ◽  
E. M. Kartzmark
Keyword(s):  
Acetic Anhydride ◽  
Carbon Disulfide ◽  
General Rule ◽  
Dielectric Constants ◽  
Excess Volumes ◽  
Solution Temperature ◽  
Critical Solution Temperature ◽  
Heats Of Mixing ◽  
Upper Critical Solution Temperature ◽  
Molar Polarization

The following physical properties of the acetic anhydride – acetone – carbon disulfide system have been investigated: congruent compositions, excess volumes, dielectric constants. For the system acetone – carbon disulfide, the excess volumes and the molar polarizations are much greater than those required by the mixture rule. From this we deduced that this system is very non-ideal and might, at a suitable temperature, form two layers; two liquid layers did indeed form at −73 °C, the upper critical solution temperature occurring somewhere between this temperature and 0 °C. We offer it as a general rule that, if the deviation from additivity of molar polarization is large and positive, two layers will form at a sufficiently low temperature, provided that solid phases do not intervene. This deduction becomes almost a certainty if large positive deviations from additivity of molar volume and large positive heats of mixing are also present.

Dielectric relaxation in relation to viscosity of some organic molecules and some of their binary mixtures

2007 ◽  
Vol 135 (1-3) ◽  
pp. 115-119 ◽  
Author(s):  
S.T. Vasan ◽  
F.M. Sannaninganavar ◽  
N.H. Ayachit ◽  
D.K. Deshpande
Keyword(s):  
Dielectric Relaxation ◽  
Binary Mixtures ◽  
Organic Molecules

THE DIELECTRIC CONSTANTS OF BINARY MIXTURES

1926 ◽  
Vol 48 (7) ◽  
pp. 1888-1896 ◽  
Author(s):  
John Warren Williams ◽  
Ignace J. Krchma
Keyword(s):  
Binary Mixtures ◽  
Dielectric Constants

Studies on density, viscosity, dielectric constant, and refractive index of binary mixtures of esters in benzene and carbon tetrachloride

1988 ◽  
Vol 66 (1) ◽  
pp. 111-116 ◽  
Author(s):  
Shantilal Oswal
Keyword(s):  
Carbon Tetrachloride ◽  
Ethyl Acetate ◽  
Binary Mixtures ◽  
Molecular Interaction ◽  
Butyl Acetate ◽  
Molar Refraction ◽  
Dielectric Constants ◽  
Ethyl Butyrate ◽  
Propyl Acetate ◽  
Π Complex

Densities, viscosities, dielectric constants, and refractive indices have been determined for six binary mixtures of propyl acetate, butyl acetate, and ethyl butyrate in benzene and carbon tetrachloride at different mole fractions and temperatures. The excess volumes VE, apparent excess values of viscosity δη, excess Gibbs energy of activation of flow ΔG*E, excess molar polarizations [Formula: see text], excess molar refraction [Formula: see text], and excess dielectric constants εE have been calculated from the experimental data. The results for these binary mixtures are compared with those of ethyl acetate with benzene, carbon tetrachloride, and cyclohexane and of propyl acetate, butyl acetate, and ethyl butyrate with cyclohexane. The results for VE, ΔG*E, [Formula: see text], and εE indicate specific molecular interaction between unlike molecules in ester + benzene and ester + carbon tetrachloride. The specific molecular interaction for mixtures of esters with benzene may be due to n–π complex formation between the free electrons of carboxylic group and aromatic ring while with carbon tetrachloride it may be due to dipole – induced dipole interactions. The molar refractions for all six mixtures vary linearly with mole fraction of components. Comparison between experimental excess volume VE and excess viscosity Δ ln η and that calculated from Flory theory for ethyl acetate + benzene and ethyl acetate + carbon tetrachloride has also been made.

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