Magneto-optical rotation studies of liquid mixtures. Part 7.—Further studies with mixtures involving methanol, acetone and ether, and the calculation of the equilibrium constant of interaction

Abstract

In this final paper of a series concerned with the magneto-optical rotations of binary liquid mixtures the results are presented of a study (at 436 nm) of mixtures of a second component with (a) methanol, (b) acetone and (c) diethyl ether. As in previous work, the departures from ideality were treated in terms of an excess magnetic rotation, α^E, and this function was correlated with interactions between the components of the mixtures. Some determinations of α^E were also made at 366 nm for systems in which complexes of the charge-transfer type are thought to be present and the results are compared with previous work at 436 nm. Using the α^E–composition results for various systems, an attempt has been made to calculate the interaction equilibrium constant, K, between the components in an equimolar mixture and also the magnetic rotation of the resultant complex. It is likely that the K values are more appropriate than the α^E values in comparing the interactions between the components in mixtures of widely differing character.