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Anurag Kishore Grade: 12
        

Sir please explain what is active methylene?


How does it take part in reactivity of compound?

6 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear Anurag  


In some molecules there are H atoms that are adjacent to 2 carbonyl groups (which are electron withdrawing). Extra resonance stabilisation of the enolate anion makes these H more acidic (i.e lower pKa) than hydrogens adjacent to a single carbonyl group. These type of compounds are sometimes called "active methylenes"  (recall a methylene group is a CH2)




acidity of an active methylene system


 


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Badiuddin

6 years ago
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