a
(a) \(\mathop {\mathop {C{H_3}}\limits^{s{p^3}} - \mathop {CO}\limits^{s{p^2}} - \mathop {C{H_3}}\limits^{s{p^3}} }\limits_{{\text{Acetone}}} \) \(\mathop {\mathop {C{H_3}}\limits^{s{p^3}} \mathop {COOH}\limits^{s{p^2}} }\limits_{{\text{Acetic acid}}} \) \(\mathop {\mathop {C{H_3}}\limits^{s{p^3}} - \mathop C\limits^{sp} \equiv N}\limits_{{\text{Acetonitrile}}} \) \(\mathop {\mathop {C{H_3}}\limits^{s{p^3}} - \mathop {CON{H_2}}\limits^{s{p^2}} }\limits_{{\text{Acetamide}}} \)