Classes of Amines CH2CH3 Primary (1):one C-N bond,2 N-H bonds. 。 Secondary (2):two C-N bonds,1 N-H bond. Tertiary (3):three C-N bonds,no N-H bond. Quaternary (4):four C-N bonds, nitrogen has a formal charge. > Chapter 19 4Chapter 19 4 Classes of Amines • Primary (1): one C-N bond, 2 N-H bonds. • Secondary (2): two C-N bonds, 1 N-H bond. • Tertiary (3): three C-N bonds, no N-H bond. • Quaternary (4): four C-N bonds, nitrogen has a + formal charge. =>