Ph-C equiv CH xrightarrow[Excess]{HCl} X xrig | vedclass

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(D) $1$. The reaction of $Ph-C \equiv CH$ with excess $HCl$ follows Markovnikov's rule,leading to the formation of a gem-dichloride: $Ph-CCl_2-CH_3$ $

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Schiff's base

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(D) $1$. The reaction of $Ph-C \equiv CH$ with excess $HCl$ follows Markovnikov's rule,leading to the formation of a gem-dichloride: $Ph-CCl_2-CH_3$ $(X)$.$2$. Treatment of $X$ with $KOH (aq.)$ performs nucleophilic substitution/hydrolysis,converting the gem-dichloride into a ketone: $Ph-CO-CH_3$ (Acetophenone,$Y$).$3$. The reaction of acetophenone $(Y)$ with ethylamine $(CH_3-CH_2-NH_2)$ is a condensation reaction forming an imine: $Ph-C(CH_3)=N-CH_2-CH_3$.$4$. Compounds formed by the condensation of a carbonyl group with a primary amine are known as Schiff's bases.

$Ph-C \equiv CH$ $\xrightarrow[Excess]{HCl} X$ $\xrightarrow{KOH (aq.)} Y$ $\xrightarrow{CH_3-CH_2-NH_2} Z,$
$Z$ is known as

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$Ph-C \equiv CH$ $\xrightarrow[Excess]{HCl} X$ $\xrightarrow{KOH (aq.)} Y$ $\xrightarrow{CH_3-CH_2-NH_2} Z,$$Z$ is known as