R-CH_2-CH_2OH can be converted into R-CH_2-CH | vedclass

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Question

(A) The conversion of an alcohol to a carboxylic acid with an additional carbon atom involves the following steps:$1$. Conversion of alcohol to alkyl

Vedclass · Accepted Answer

$PBr_3, KCN, H_3O^{+}$

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(A) The conversion of an alcohol to a carboxylic acid with an additional carbon atom involves the following steps:$1$. Conversion of alcohol to alkyl bromide using $PBr_3$: $R-CH_2-CH_2OH \xrightarrow{PBr_3} R-CH_2-CH_2-Br$$2$. Nucleophilic substitution with $KCN$ to form a nitrile: $R-CH_2-CH_2-Br \xrightarrow{KCN} R-CH_2-CH_2-CN$$3$. Acidic hydrolysis of the nitrile to form a carboxylic acid: $R-CH_2-CH_2-CN \xrightarrow{H_3O^{+}} R-CH_2-CH_2-COOH + NH_3$Therefore,the correct sequence is $PBr_3, KCN, H_3O^{+}$.

$R-CH_2-CH_2OH$ can be converted into $R-CH_2-CH_2-COOH$. The correct sequence of the reagents is:

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