. 2020 Dec 28;21(1):396–413. doi: 10.1021/acs.cgd.0c01242

Table 7. Examples of Acid–Base Pairs That under Various Conditions Can Form a Neutral or Ionized Complex.

base–acid pair	stoichiometry of neutral base–acid complex	stoichiometry of ionic base–acid complex
pyridine–formic acid⁸³	1:1	1:4
pyridine–3,5-dinitrobenzoic acid⁸⁴	1:2	1:1:1 with water
2,3-lutidine–fumaric acid⁸⁵	2:1	1:2
sulfamethazine–saccharin⁸⁶	1:1⁸⁷	1:1^87,88