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Multiple Choice
Predict the major, organic product for the following reaction.
A
B
C
D
Verified step by step guidance
1
Identify the reactants: The starting material is a ketone, specifically 2-pentanone, and the reagent is an organolithium compound, 2-lithiopentane.
Understand the reaction type: This is a nucleophilic addition reaction where the organolithium reagent acts as a nucleophile, attacking the electrophilic carbonyl carbon of the ketone.
Predict the intermediate: The nucleophilic attack by the organolithium reagent will form a new carbon-carbon bond, resulting in an alkoxide intermediate.
Consider the quenching step: The alkoxide intermediate is then protonated by the acid (H⁺ quench) to form the corresponding alcohol.
Determine the stereochemistry: Since the reaction involves the formation of a new chiral center, the product will be a racemic mixture, indicated by the (±) symbol in the product structures.