Amines form alkaline solutions H2N NH2 Putrescine(1, 4-butanediamine Cadaverine (1, 5-pentanediamine) Fig 12.16 low-formula-mass amines like these tend to have an offensive odorAmines form alkaline solutions H2 N NH2 Putrescine (1,4-butanediamine) Cadaverine(1,5-pentanediamine) NH2 H2N Fig 12.16 low-formula-mass amines like these tend to have an offensive odor