1.

Identify the method by which Me_(3)C CO_(2)H can be prepared.

Answer»

Treating 1 mol of MECOME with 2 moles of MeMgI.
Treating 1 mol of `MeCO_(2)Me` with 3 moles of MeMgl followed by hydrolysis.
Treating 1 mol of MeCHO with 3 moles of MeMgI.
Treating 1 mol of dry ice with 1 mol of `Me_(3)CMGL` followed by hydrolysis.

Solution :`O=C=O+Me_(3)CMgI to O=underset(underset(underset(Me_(2)C-overset(O)overset(||)C-OH)(darr H_(3)O^(+)))(CMe_(3)))underset(|)C-OMgI`


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