Appendix I – Ionization Constants of Weak Bases

Base

Lewis Structure

K_b at 25 °C

ammonia

1.8 × 10⁻⁵

dimethylamine

5.9 × 10⁻⁴

methylamine

4.4 × 10⁻⁴

phenylamine (aniline)

4.3 × 10⁻¹⁰

trimethylamine

6.3 × 10⁻⁵