Identify the final product (Z) in the following sequence of...

Identify the final product (Z) in the following sequence of reactions.

{C}_{6}{H}_{5}COOH\overset{\left(i\right)\text{LiAl}{\text{H}_{4}\left(ii\right)\text{PB}{\text{r}_{3}}{→} \left(X\right)\overset{KCN}{→} \left(Y\right)\overset{LiAl{H}_{4}}{→}\left(Z\right)

Options

A ${C}_{6}{H}_{5}C{H}_{2}N{H}_{2}$
B ${C}_{6}{H}_{5}C{H}_{2}C{H}_{2}N{H}_{2}$
C ${C}_{6}{H}_{5}C{H}_{2}C{H}_{2}C{H}_{2}N{H}_{2}$
D ${C}_{6}{H}_{5}\mathop{\mathop{C}_{|}H -}_{C{H}_{3}}N{H}_{2}$

Correct answer

B. ${C}_{6}{H}_{5}C{H}_{2}C{H}_{2}N{H}_{2}$

Step-by-step solution

This conversion is as follows

{C}_{6}{H}_{5}COOH\overset{LiAl{H}_{4}}{→}{C}_{6}{H}_{5}C{H}_{2}OH\overset{PB{r}_{3}}{→}\mathop{{C}_{6}{H}_{5}C{H}_{2}Br}_{\left(X\right)}\overset{KCN}{→}\mathop{{C}_{6}{H}_{5}C{H}_{2}CN}_{\left(Y\right)}

\overset{LiAl{H}_{4}}{→}\mathop{{C}_{6}{H}_{5}C{H}_{2}C{H}_{2}{NH}_{2}}_{Z}

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