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In the following sequence of reactions

CH_{3}-Br\overset{KCN}{\rightarrow}A\overset{H_{3}O^{+}}{\rightarrow}B\xrightarrow[ether]{LiAlH_{4}}C , the end product (C) is

  • Option 1)

    Acetone

  • Option 2)

    Methane

  • Option 3)

    Acetaldehyde

  • Option 4)

    Ethyl alcohol

 

Answers (1)

best_answer

As we learnt in 

Alcohol formation by reduction of carboxylic acids -

Yields primary alcohol.

- wherein

RCOOH+LiAlH_{4}\rightarrow RCH_{2}OH

 

 

Preparation of alcohol -

By treatment with  ag.KOH  or moist  Ag2O

- wherein

RX+KOH(ag)\rightarrow ROH+KX


RX+Ag_{2}O(moist)\rightarrow ROH+AgX

 

 CH_{3}Br \xrightarrow{} {KCN}CH_{3}CN \xrightarrow{}{H_{3}O^{+}}CH_{3}COOH \xrightarrow {LiAlH_{4}} \underset{Ethyl\ Alcohol}{CH_{3}CH_{2}OH}

 


Option 1)

Acetone

This solution is incorrect 

Option 2)

Methane

This solution is incorrect 

Option 3)

Acetaldehyde

This solution is incorrect 

Option 4)

Ethyl alcohol

This solution is correct 

Posted by

prateek

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