Explanation:
\(\mathop {\mathop {\rm{C}}\limits^{\rm{3}} {{\rm{H}}_{\rm{2}}}\,\,{\rm{ = }}\,\,\mathop {\rm{C}}\limits^{\rm{2}} {\rm{H}}\,\,{\rm{ - }}\,\,\mathop {\rm{C}}\limits^{\rm{1}} {\rm{N}}}\limits_{{\rm{Prop - 2 - ene - 1 - nitrile}}} \). Common name of given compound is Vinyl cyanide.