Orientational polarizability, relation difference

Dipole-Dipole Interaction. The first of the four terms in the total electrostatic energy depends on the permanent dipole moment of the solute molecule of radius a (assuming a spherical shape) immersed in a liquid solvent of static dielectric constant D. The function f(D) = 2(D - l)/(2D + 1) is known as the Onsager polarity function. The function used here is [f(D) — f(n2)] so that it is restricted to the orientational polarity of the solvent molecules to the exclusion of the induction polarity which depends on the polarizability as of the solvent molecules, related to the slightly different Debye polarity function q>(n2) according to... 

We give here a derivation of Eqs. (8.17) and (8.18) which relate the birefringence, An = nc — na, of an uniaxially drawn sample to the orientational order parameter of the monomers, S. Two coordinate systems are introduced. The first one, with coordinates x, y, z, is fixed on the sample, with the -axis oriented in drawing direction. The second, with coordinates x, y z is anchored on a monomer unit and varies in orientation between different monomers. We choose the latter local coordinate system so that the polarizibility tensor per monomer, /3 , has a diagonal form... 

The information in this section shows that structural differences in molecules with different composition have different effects on their reactivity in electrode reactions. A substantial part is played by difference in adsorption and acid—base characteristics of the isomers, which are related both to mutual polarizability of the bonds (which varies with their mutual orientation) and to steric hindrances. 

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