A) \[{{H}_{3}}C\ \ -\overset{\overset{C{{H}_{3}}}{\mathop{|\ \ \ \ \,\,}}\,}{\mathop{\underset{\underset{OH}{\mathop{\ |\ \,\ \ \ }}\,\ }{\mathop{C\ -}}\,}}\,\overset{\overset{C{{H}_{3}}}{\mathop{|\,\,\,\ \ \ \ \ }}\,\,\,\,\,\,\,\,\,\,}{\mathop{\underset{\underset{OH\,\,}{\mathop{|\,\,\,\ \ \ \ }}\,}{\mathop{C-C}}\,{{H}_{3}}}}\,\]
B) \[C{{H}_{3}}-\underset{\underset{O}{\mathop{||}}\,}{\mathop{C}}\,-O-\underset{\underset{O}{\mathop{||}}\,}{\mathop{C}}\,-C{{H}_{3}}\]
C) \[C{{H}_{3}}-\underset{\underset{OH}{\mathop{|\ \ \ }}\,}{\mathop{CH}}\,-\underset{\underset{OH}{\mathop{|\ \ \ }}\,}{\mathop{CH}}\,-C{{H}_{3}}\]
D) None of these
Correct Answer: A
Solution :
\[\underset{\text{Acetone}}{\mathop{2C{{H}_{3}}-CO-C{{H}_{3}}}}\,\underset{{{H}_{2}}O}{\mathop{\xrightarrow{Mg/Hg}}}\,\underset{(\text{Pinacol})}{\mathop{{{H}_{3}}C-\underset{_{OH\,\,}^{\,|}\,}{\overset{_{\,|}^{C{{H}_{3}}}\,}{\mathop{C\,\,\,-\,\,\,}}}\,\underset{_{OH}^{\,|}\,\,\,\,\,\,\,\,\,\,}{\overset{_{\,|}^{C{{H}_{3}}}\,\,\,\,\,\,\,\,}{\mathop{C-C{{H}_{3}}}}}\,}}\,\]
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