Functional isomers: \(\mathop {C{H_3}C{H_2}C{H_2} - C{H_2} - OH}\limits_{{\text{Butanol}}} \) and \(\mathop {{C_2}{H_5} - O - {C_2}{H_5}}\limits_{{\text{Diethyl}}\,{\text{ether}}} \)
Metamers: \(C{H_3}C{H_2}C{H_2}COOH\,({C_4}{H_8}{O_2})\) and \(\mathop {C{H_3} - O - {C_3}{H_7}}\limits_{{\text{Methyl propyl ether}}} \)