Ph-CO-CH_3 xrightarrow[H_2O]{Mg-Hg} Product. | vedclass

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(C) The reaction of acetophenone $(Ph-CO-CH_3)$ with magnesium amalgam $(Mg-Hg)$ and water is a bimolecular reduction known as pinacol coupling. This

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$Ph-C(OH)(CH_3)-C(OH)(CH_3)-Ph$

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(C) The reaction of acetophenone $(Ph-CO-CH_3)$ with magnesium amalgam $(Mg-Hg)$ and water is a bimolecular reduction known as pinacol coupling. This reaction involves the formation of a radical intermediate which dimerizes to form a $1,2$-diol,commonly called a pinacol. The reaction is: $2Ph-CO-CH_3 \xrightarrow[H_2O]{Mg-Hg} Ph-C(OH)(CH_3)-C(OH)(CH_3)-Ph$.

$Ph-CO-CH_3 \xrightarrow[H_2O]{Mg-Hg}$ Product. The main product is:

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