Abstract

The intrinsic partition coefficients (kt) of p-alkylpyridines and the extraction constants (Ke) of the corresponding ionpairs of the protonated base chlorides were determined in chloroform-water and octanol-water systems. A linear relationship with unit slope was found between log (kt) and log (Ke). This result has been explained on the basis that, because of methylene (CH2) increments occurring distantly from the polar portion of the molecule, their influence upon the oil-water partition coefficient would be expected to be the same for the free base and the ion-pair.

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