THE DIELECTRIC CONSTANTS OF BINARY MIXTURES. II. THE ELECTRIC MOMENTS OF CERTAIN ORGANIC MOLECULES IN BENZENE SOLUTION

1927 ◽  
Vol 49 (7) ◽  
pp. 1676-1686 ◽  
Author(s):  
John Warren Williams ◽  
Ignace J. Krchma
Keyword(s):  
Binary Mixtures ◽  
Organic Molecules ◽  
Benzene Solution ◽  
Dielectric Constants

Dielectric relaxation of dihalobenzenes. I. Ortho and meta Cl2, Br2, and I2 in benzene solution

1968 ◽  
Vol 46 (24) ◽  
pp. 2745-2748 ◽  
Author(s):  
Abhai Mansingh ◽  
David B. McLay
Keyword(s):  
Benzene Solution ◽  
Relaxation Times ◽  
Dielectric Constants ◽  
Cole Plot ◽  
Molecular Reorientation ◽  
Dielectric Data ◽  
Distribution Parameters ◽  
Order Of Magnitude ◽  
The Right ◽  
Right Order

Dielectric data have been measured for the dilute solutions in benzene at 20.0 °C of the ortho- and meta-isomers of dichlorobenzene, dibromobenzene, and diiodobenzene. The "static" dielectric constants have been measured at 100 kHz, the dielectric constants and losses have been measured at both 9.06 and 21.00 GHz, and the refractive indices have been measured at optical wavelengths. Cole–Cole plots can be fitted to the data to yield mean relaxation times τ0 and distribution parameters α. The values of the relaxation times in the ortho-isomers are 11.8, 14.9, and 20.6 ps for dichlorobenzene, dibromobenzene, and diiodobenzene respectively. The corresponding values for the meta-isomers are 8.6, 10.7, and 13.5 ps respectively, values which increase in the same direction with halogen substituent but which are significantly smaller than the relaxation times for the other isomers. All of these times are of the right order of magnitude for molecular reorientation and there is no evidence for dipole–dipole interactions. Although the nonzero values of the distribution parameters will allow mathematical descriptions in terms of two relaxation times τ1 and τ2, the values derived from two such descriptions yield two unrealistic relaxation times for each molecule. It is concluded that the analysis based on the Cole–Cole plot gives the most meaningful results.

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
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