24. 4, 5-Bis (trifluoromethyl) imidaeole a pH at half-neutralization in ca. 0.02 M solution in HzO, glass electrode. Value for NH, 9.2; n-butylamine, 10.6. b Best result. Difficulty has been encountered in repeating this experiment. The amine was purified by gas chromatography over Dow Corning silicone oil No. 703 on firebrick.
