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The correct order of reactivity of PhMgB...

The correct order of reactivity of PhMgBr with
`underset((I))(Ph-underset(C)overset(O)overset(||)(C)-Ph)" " underset((II))(CH_(3)-overset(O)overset(||)(C)-H)" " underset((III))(CH_(3)-overset(O)overset(||)(C)-CH_(3))` is

A

`(I) gt (II) gt (III)`

B

`(III) gt (II) gt (I)`

C

`(II) gt (III) gt (I)`

D

`(I) gt (III) gt (II)`

Text Solution

Verified by Experts

The correct Answer is:
C
In nucleophilic addition reaction, the carbonyl compound will respond in preference which is sterically more exposed and electronically have intact positive charge over carbonyl carbon. So reactivity order towards reaction with PhMgBr is `(II) gt (III) gt (I)`.
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