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Some major effects of ring substituents on the partition coefficients of quinone headgroups are described. Attention is drawn to the large differences in partition coefficients in cyclohexane/water of the two major freely diffusing redox forms, the quinone, Q, and the hydroquinone, QH 2 . Methoxy substituents cause a marked increase of the cyclohexane/water partition coefficient of the hydroquinone,...
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