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Chapter 28 Appendix D: Dissociation Constants and pKb Values for Bases at 25°C
| Name | Formula | K b | pKb |
|---|---|---|---|
| Ammonia | NH3 | 1.8 × 10−5 | 4.75 |
| Aniline | C6H5NH2 | 7.4 × 10−10 | 9.13 |
| n-Butylamine | C4H9NH2 | 4.0 × 10−4 | 3.40 |
| sec-Butylamine | (CH3)2CHCH2NH2 | 3.6 × 10−4 | 3.44 |
| tert-Butylamine | (CH3)3CNH2 | 4.8 × 10−4 | 3.32 |
| Dimethylamine | (CH3)2NH | 5.4 × 10−4 | 3.27 |
| Ethylamine | C2H5NH2 | 4.5 × 10−4 | 3.35 |
| Hydrazine | N2H4 | 1.3 × 10−6 | 5.9 |
| Hydroxylamine | NH2OH | 8.7 × 10−9 | 8.06 |
| Methylamine | CH3NH2 | 4.6 × 10−4 | 3.34 |
| Propylamine | C3H7NH2 | 3.5 × 10−4 | 3.46 |
| Pyridine | C5H5N | 1.7 × 10−9 | 8.77 |
| Trimethylamine | (CH3)3N | 6.3 × 10−5 | 4.20 |
Source of data: CRC Handbook of Chemistry and Physics, 84th Edition (2004).