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Kolbe Electrolysis for Alkenes

The reaction ...

Question

The reaction of acetaldehyde in the presence of $A l (O C_{2} H_{5})_{3}$ produces:

C H_{3} C H (O H) C H_{2} C H O

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C H_{3} C H = C H - C H O

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C H_{3} C O O C_{2} H_{5}

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Solution

The correct option is B $C H_{3} C O O C_{2} H_{5}$
All aldehydes in the presence of aluminium ethoxide $A l (O C_{2} H_{5})_{3}$ can be simultaneously oxidized to acid and reduced to alcohols to form esters. This is called Tischenko reaction, it is like a Cannizzaro reaction.
$C H_{3} C H O A l (O C_{2} H_{5})_{3} - ------ \to C H_{3} C O O C_{2} H_{5}$

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