Verified Solution • 2025–26 Session moderate

QAIPM-2011-Ch-1777: NEET 2011 Chemistry - Class 12 AIPM-2011-Ch-1777 Solution: The order of reactivity of phenyl magnesium bromide (PhMgBr)…

The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds:

Multiple Choice Options

  • A III>II>IIII>II>I
  • B II>I>IIIII>I>III
  • C I>III>III>III>II
  • D I>II>IIII>II>III

Step-by-Step Verified Solution

The reactivity of the carbonyl group towards the nucleophilic addition reactions depend upon the magnitude of the positive charge on the carbonyl carbon atom (electronic factor) and also on the crowding around the carboxyl carbon atom in the transition state (steric factor). Both these factors predict the following order I > II > III

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