(C_2H_5O)_2CO xrightarrow[H_3O^{+}]{CH_3MgBr( | vedclass

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(D) The reaction of diethyl carbonate with excess Grignard reagent proceeds as follows:$(C_2H_5O)_2CO + 3CH_3MgBr \xrightarrow{H_3O^{+}} (CH_3)_3COH +

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as in $(b)$ and $(c)$

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(D) The reaction of diethyl carbonate with excess Grignard reagent proceeds as follows:$(C_2H_5O)_2CO + 3CH_3MgBr \xrightarrow{H_3O^{+}} (CH_3)_3COH + 2C_2H_5OH$.Product $A$ is $tert$-butyl alcohol $((CH_3)_3COH)$.In option $(b)$: $CH_3-COOC_2H_5 + 2CH_3MgBr \xrightarrow{H_3O^{+}} (CH_3)_3COH + C_2H_5OH$.In option $(c)$: $CH_3-CO-CH_3 + CH_3MgBr \xrightarrow{H_3O^{+}} (CH_3)_3COH$.Therefore,both $(b)$ and $(c)$ yield the same product $A$.

$(C_2H_5O)_2CO \xrightarrow[H_3O^{+}]{CH_3MgBr(\text{excess})} A$. $A$ (alcohol) can also be obtained by:

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