Extension of the self-consistent spectrophotometric basicity scale in acetonitrile to a full span of 28 pKa units: Unification of different basicity scales

The goal of the study is to expand significantly the existing self-consistent scale toward superbasic direction and also toward weaker neutral organic bases for several pKa units. The revised basicity scale was interconnected with the self-consistent acidity scale by delta(pKa) measurements between acids and bases.