Ethylene dichloride (ClCH_2-CH_2Cl) and ethyl | vedclass

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Question

(C) Ethylene dichloride $(ClCH_2-CH_2Cl)$ is a vicinal dihalide,and ethylidene chloride $(CH_3-CHCl_2)$ is a geminal dihalide.Both react with alcoholi

Vedclass · Accepted Answer

They react with aq. $KOH$ and give the same product.

Vedclass · Answer

(C) Ethylene dichloride $(ClCH_2-CH_2Cl)$ is a vicinal dihalide,and ethylidene chloride $(CH_3-CHCl_2)$ is a geminal dihalide.Both react with alcoholic $KOH$ to undergo dehydrohalogenation.Both are dihalides.When they react with aqueous $KOH$ (a nucleophilic substitution reaction),they yield different products:$1$. Ethylene dichloride reacts with aqueous $KOH$ to form ethylene glycol $(HOCH_2-CH_2OH)$.$2$. Ethylidene chloride reacts with aqueous $KOH$ to form an unstable gem-diol $(CH_3-CH(OH)_2)$,which immediately loses a water molecule to form acetaldehyde $(CH_3CHO)$.Therefore,the statement that they give the same product with aqueous $KOH$ is incorrect.

Ethylene dichloride $(ClCH_2-CH_2Cl)$ and ethylidene chloride $(CH_3-CHCl_2)$ are isomeric compounds. Identify the statement which is not applicable to both of them.

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