1.

The indicated atom is not a nuclcophilic site in

Answer»

`underset(UARR )(BH_(4)^(-))`
`underset(uarr )(CH_(3) ) `Mgl
`CH_(3) underset(uarr)(O)H`
`CH_(3) underset(uarr )(N)H_(2)`

Solution :In `BH_(4)^(-)` . there is no lone pair on B-atom. HENCE, t is not a nucleophilic site


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