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Chemistry LibreTexts

E2. Base Dissociation Constants at 25°C

  • Page ID
    9067
  • Name Formula \(K_b\) \(pK_b\)
    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