$\begin{matrix}
\overset{\Theta }{\mathop{\overset{\centerdot \,\centerdot }{\mathop{C}}\,}}\,{{H}_{2}}-C-C{{H}_{3}} \\
|| \\
O \\
\end{matrix}$ અને $\begin{matrix}
C{{H}_{2}}=C-C{{H}_{3}} \\
| \\
:\underset{\Theta }{\mathop{\underset{\centerdot \,\centerdot }{\mathop{O}}\,}}\,: \\
\end{matrix}$
$(i)$ $C{H_3}\mathop {\mathop C\limits_{||} }\limits_O - {O^ - }$ $(ii)$ $C{H_3}{O^ - }$
$(iii)$ $C{N^ - }$ $(iv)$ $Image$