${C_2}{H_5}I\xrightarrow{{Alco.\,\,KOH}}X\xrightarrow{{B{r_2}}}Y\xrightarrow{{KCN}}Z$
\(\xrightarrow{{KCN}}\) \(\mathop {\begin{array}{*{20}{c}}
{C{H_2} - C{H_2}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,} \\
{CN\,\,\,\,\,\,\,\,\,CN}
\end{array}}\limits_{{\text{Butene - 1, 4 - dinitrile}}} \)


| પ્રકિયા | નીપજ | |
| $I$ | $RX + AgCN$ | $RNC$ |
| $II$ | $RX + KCN$ | $RCN$ |
| $III$ | $RX + KNO_2$ | (image) |
| $IV$ | $RX + AgNO_2$ | $R-O-N = O$ |



