Abstract

It is shown that in the calculation of the contribution to the Kerr effect in polar liquids by the hyperpolarizabilities, the effective field should be taken equal to the sum of the Lorentz field and the reaction field. Calculation of first hyperpolarizabilities on this basis by combining values of the Kerr constant with values of the alignment from electrically induced line splitting in NMR, yields for strongly polar molecules (μ ≈ 4 D) values that are smaller by an order of magnitude than those from previous calculations on the same effects, but that compare more favourably with other data.

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