question_answer

Identify the method by which \[M{{e}_{3}}CC{{O}_{2}}H\]can be prepared.

A)  Treating 1 mole of MeCOMe with 2 moles of MeMgI

B)  Treating 1 mole of \[MeC{{O}_{2}}\]Me with 3 moles of MeMgI

C)  Treating 1 mole of MeCHO with 3 moles of MeMgI

D)  Treating 1 mole of dry ice with 1 mol of \[M{{e}_{3}}CMgI\]

Correct Answer: D

Solution :

 \[\underset{dry\,ice}{\mathop{O=C=O}}\,+{{(C{{H}_{3}})}_{3}}-C-MgI\xrightarrow{{}}\] \[O=\overset{C{{(C{{H}_{3}})}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,-OMgI\xrightarrow{HOH}\]