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Out of the following which compound contains an active methylene group? (A) CH3CH2COOH (B) CH3COCH2COOC2H5 (C) CH3CH2COOC2H5 (D) CH3CH2COCH2CH3

Out of the following which compound contains an active methylene group? (A)  CH3CH2COOH (B) CH3COCH2COOC2H5 (C) CH3CH2COOC2H5 (D) CH3CH2COCH2CH3

Grade:12th pass

1 Answers

Arun
25750 Points
5 years ago

Active methylene compounds are those in which a methylene group (-CH2-) is sandwiched between two strong electron-withdrawing groups, usually the carbonyl group.

The hydrogen atoms of such a methylene group are very significantly acidic. This is because the carbanion formed by the removal of a proton from the methylene group is well stabilized by the two adjacent electron-withdrawing carbonyl groups .

 

hence option B i.e. ethyl acetoacetate is cprrect answer

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