Chemistry - ORGANOMETALLIC COMPOUNDS Question with Solution | TestHub

The reactant contains three functional groups that react with the Grignard reagent:

Acid Chloride: Consumes 2 moles to form a tertiary alcohol.

Ester: Consumes 2 moles to form a tertiary alcohol.

Nitrile: Consumes 1 mole to form an imine salt (which would yield a ketone upon workup).

Since the Grignard reagent is in excess, all these sites will react completely. Summing these up ($2+2+1=5$), the total number of moles of Grignard reagent consumed per mole of the reactant is 5.