1.

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

Answer»

`I gt II gt III`
`III gt II gt I`
`II gt III gt I`
`I gt III gt I`

SOLUTION :This is explained on the basis of electronic and STERIC factors. As a result the nucleophile ATTACK can take place most readily in (II) while it is most difficult in (I).


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