STRONGLY BASIC SYSTEMS: III. THEHFUNCTION FOR VARIOUS SOLVENT SYSTEMS

Abstract
The Hammett acidity function concept has been used to determine simultaneously the pKavalues of 24 substituted anilines and diphenylamines and the Hvalues of various solvent systems. The following solvent systems were examined (the most basic Hvalue obtained for each is shown in parentheses): water containing benzyltrimethylammonium hydroxide (16.20); pyridine–water containing tetramethylammonium hydroxide (18.91); sulpholane–water containing tetramethylammonium hydroxide (19.18); dimethyl sulphoxide–water containing tetramethylammonium hydroxide (18.61); water containing lithium hydroxide (14.31).In addition to these results adjustments have been made to previously published scales for hydrazine–water (15.08) and ethylenediamine–water (15.48).

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