Which of the following reagents is the correc | vedclass

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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

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$PBr_3, KCN, H_3O^+$

Vedclass · Answer

(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: $R-CH_2-CH_2OH \xrightarrow{PBr_3} R-CH_2-CH_2Br$$2$. Nucleophilic substitution with cyanide: $R-CH_2-CH_2Br \xrightarrow{KCN} R-CH_2-CH_2CN$$3$. Acidic hydrolysis of nitrile to carboxylic acid: $R-CH_2-CH_2CN \xrightarrow{H_3O^+} R-CH_2-CH_2COOH$Thus,the correct sequence of reagents is $PBr_3, KCN, H_3O^+$.

Which of the following reagents is the correct sequence for the conversion of $R-CH_2-CH_2OH$ to $R-CH_2-CH_2-COOH$?

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