Determination of dipole moment values of anisotropic molecules using Brot's formalism

1990 ◽  
Vol 68 (9) ◽  
pp. 1523-1526
Author(s):  
P. Brito ◽  
M. Mechetti
Keyword(s):  
Molecular Structure ◽  
Dipole Moment ◽  
Dipole Moments ◽  
Dilute Solutions ◽  
Molecular Anisotropy ◽  
Derivatives Of ◽  
Best Parameters

A method for the determination of dipole moment values based on Brot's theory is proposed. It takes into account the influence of the molecular anisotropies of shape and polarizability on the permittivity of a mixture. Starting from measurements performed on dilute solutions and from the knowledge of the molecular structure of some chlorinated derivatives of α-cyanostilbene and 1,3 derivatives of benzene, the best parameters of an ellipsoid used for the representation of a polar anisotropic molecule are determined. The dipole moments obtained, using benzene and tetrachloromethane as solvents, are finally compared to values from the literature. Keywords: dipole moment, Brot's formalism, molecular anisotropy.

scholarly journals Dipole moments and molecular structure. Part I.— A simple resonance method for the measurement of dielectric constants

1932 ◽  
Vol 136 (829) ◽  
pp. 251-255 ◽  
Keyword(s):  
Molecular Structure ◽  
Dipole Moment ◽  
Dipole Moments ◽  
Resonance Method ◽  
Dielectric Constants ◽  
Present Communication ◽  
Dilute Solutions ◽  
Resonance Circuit ◽  
Low Resistance ◽  
Voltage Resonance

Numerous types of resonance methods for the measurement of dielectric constants have been described by different investigators. That detailed in the present communication has no claim to originality, but it is a simple, whilst at the same time reliable, form, which has proved to be very useful for the measurement of the dielectric constants of dilute solutions for the purpose of dipole moment determination. A fairly powerful oscillator is used, enabling the valveless resonance circuit to be some distance removed from it, whilst still receiving ample “pick-up” for the measurements. Resonance in the pick-up circuit is detected by means of a low-resistance thermo-junction, introduced directly into the circuit. The resistance thus introduced does not damp the oscillation unduly. The very small conductivity of the solvent liquids employed does not produce any appreciable error owing to the current resonance not occurring at the same tuning capacity as the voltage resonance.

Dipole moment studies of some derivatives of 4-pyridone

1972 ◽  
Vol 25 (12) ◽  
pp. 2605 ◽  
Author(s):  
BD Batts ◽  
AJ Madeley
Keyword(s):  
Dipole Moment ◽  
Dipole Moments ◽  
Phenyl Group ◽  
A Value ◽  
Derivatives Of

The dipole moments of 13 derivatives of 4-pyridone were measured. Attempts to obtain a value for 4-pyridone were unsuccessful but a value of 6.O D is compatible with other evidence. Dipole moment and n.m.r, evidence indicated that for N-phenyl-4-pyridone the phenyl group is inductively electron-repelling (in contrast to that reported)1,2 for N-phenylpyrrole) and that the rings are probably collinear.

Determination of the Dipole Moments of Some Derivatives of Hydroxybenzoic Acid1

1951 ◽  
Vol 73 (8) ◽  
pp. 3584-3588 ◽  
Author(s):  
Charles S. Copeland ◽  
M. Wesley Rigg
Keyword(s):  
Dipole Moments ◽  
Derivatives Of
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