Problem: Rank the following active methylene compounds in order of decreasing acid strength.

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We are asked to rank the following active methylene compounds in order of decreasing acid strength.


Active methylene group is that group that has two electron-withdrawing groups on either side. Hence the hydrogens of this -CH2 group are extremely acidic.

  • The stronger the withdrawing group, the more acidic the active methylene hydrogens are. 


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Rank the following active methylene compounds in order of decreasing acid strength.

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