Which of the following reactions gives an inc | vedclass

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Question

(C) Let's analyze each reaction:$A$. Chlorobenzene reacts with $Mg$ in dry ether to form phenylmagnesium chloride,which then reacts with $CO_2$ follow

Vedclass · Accepted Answer

$Cl-(CH_2)_5-Cl \xrightarrow{Mg/dry ether (1 eq.)}$ Cyclohexane

Vedclass · Answer

(C) Let's analyze each reaction:$A$. Chlorobenzene reacts with $Mg$ in dry ether to form phenylmagnesium chloride,which then reacts with $CO_2$ followed by acid workup to give benzoic acid. This is a correct reaction.$B$. Methyl cyanide $(CH_3CN)$ reacts with $MeMgBr$ (Grignard reagent) followed by acid hydrolysis to form acetone $(CH_3COCH_3)$. This is a correct reaction.$C$. $Cl-(CH_2)_5-Cl$ with $1$ equivalent of $Mg$ in dry ether forms a Grignard reagent at one end: $Cl-(CH_2)_5-MgCl$. This species can undergo intramolecular cyclization to form cyclopentane,not cyclohexane. Thus,this is an incorrect product.$D$. $1,3$-dichlorocyclobutane with $Mg$ can undergo intramolecular coupling to form bicyclobutane. This is a known reaction.Therefore,option $C$ is the incorrect major product.

Which of the following reactions gives an incorrect major product?

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