Question: (a) Unlike other esters, which react with Grignard reagents to give tertiary alcohols, ethyl formate (HCOCH2CH3) yields a different class of alcohols on treatment with

(a) Unlike other esters, which react with Grignard reagents to give tertiary alcohols, ethyl formate (HCOCH2CH3) yields a different class of alcohols on treatment with Grignard reagents. What kind of alcohol is formed in this case and why?
(b) Diethyl carbonate (CH3CH2OCOCH2CH3) reacts with excess Grignard reagent to yield alcohols of a particular type. What is the structural feature that characterizes alcohols prepared in this way?

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