Compound X on heating with Zn dust gives comp | vedclass

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Question

(C) The reaction sequence is as follows:$X$ $\xrightarrow{\Delta, Zn} Y$ $\xrightarrow{O_3, Zn/H_2O} 2 CH_3CH_2CHO$ (Propionaldehyde)Since the ozonoly

Vedclass · Accepted Answer

$3,4-$dibromohexane (vicinal)

Vedclass · Answer

(C) The reaction sequence is as follows:$X$ $\xrightarrow{\Delta, Zn} Y$ $\xrightarrow{O_3, Zn/H_2O} 2 CH_3CH_2CHO$ (Propionaldehyde)Since the ozonolysis product is two moles of propionaldehyde $(CH_3CH_2CHO)$,the alkene $Y$ must be hex$-3-$ene $(CH_3CH_2CH=CHCH_2CH_3)$.Heating a vicinal dibromide with $Zn$ dust causes debromination to form an alkene.Therefore,$X$ must be $3,4-$dibromohexane $(CH_3CH_2CH(Br)CH(Br)CH_2CH_3)$.Comparing this with the given options,the structure corresponds to $3,4-$dibromohexane.

Compound $X$ on heating with $Zn$ dust gives compound $Y$,which on treatment with $O_3$ followed by reaction with $Zn$ dust and $H_2O$ gives propionaldehyde. The structure of $X$ is:

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