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NTA Abhyas JEE Main2020ChemistryAldehydes and KetonesPractice

The correct order of reactivity for the addition reaction of the following carbonyl compounds with ethyl magnesium iodide is

Options

  1. AI > III > II > IV
  2. BIV > III > II > I
  3. CI > II > IV > III
  4. DIII > II > I > IV

Correct answer

A. I > III > II > IV

Step-by-step solution

If the carbony carbon is stericaly crowded then it will be reluctant to undergo addition reaction. Moreover, attachment of bulkier alkyl groups with the carbonyl carbon lessens its positive charge resulting into the minimisation of attack by from RMgBr.

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