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Grade 12th passOrganic Chemistry

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

Question image for In this question why nickel with hydrogen is not
Profile image of Atanu Mondal
7 Years agoGrade 12th pass
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2 Answers

Profile image of Ravleen Kaur
7 Years ago
H2/Ni reduces double bonds and tripple bonds selectivly.
Profile image of Vikas TU
7 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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