A footnote to Table 5.1 states “The example given is a primary amine (RNH2). Secondary ami...

A footnote to Table 5.1 states “The example given is a primary amine (RNH₂). Secondary amines have the general structure R₂NH; tertiary amines are R₃N.” Eight constitutionally isomeric amines have the molecular formula C₄H₁₁N. Write their structural formulas and classify each as a primary, secondary, or tertiary amine as appropriate.

TABLE 5.1 Functional Groups in Some Important Classes of Organic Compounds