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In this question why nickel with hydrogen is not reducing the ester group? Please explain

In this question why nickel with hydrogen is not reducing the ester group?  Please explain

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Grade:12th pass

2 Answers

Ravleen Kaur
askIITians Faculty 1452 Points
5 years ago
H2/Ni reduces double bonds and tripple bonds selectivly.
Vikas TU
14149 Points
5 years ago

We know that in ester there is resonance takin place so the effective bond number is actually less than 2.But in case of CN the bond number is less than 3 but greater than 2. So the hydrogen has a greater tendency to attack the CN group than the ester functional group.

 

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