અહીં, $Y$ શું છે ?
આઇસો પ્રોપાઇલ આલ્કોહોલ એસિટોન
$\begin{array}{*{20}{c}}
{\,\,\,\,\,\,\,C{H_3}} \\
| \\
{C{H_3} - C - OH} \\
| \\
{\,\,\,\,\,\,C{H_3}}
\end{array}\, + \,Mg < \begin{array}{*{20}{c}}
{OH} \\
{Br}
\end{array}$
તૃતિયક બ્યુટાઇલ આલ્કોહોલ


$\left. \begin{gathered}
(A)\,\,\xrightarrow{{PB{r_3}}}\,(C)\,\xrightarrow{{Mg\,,\,ether}}Grignard\,\,reagent \hfill \\
(A)\,\,\xrightarrow[{{H_2}S{O_4}}]{{N{a_2}C{r_2}{O_7}}}\,(B) \hfill \\
\end{gathered} \right\}$ $ \to \,(D)\xrightarrow{{{H_3}{O^ \oplus }}}$ $(3,4-$ ડાયમિથાઇલ $3-$ હેકઝાનોલ l$)$