Fundamentals of Organic ChemistryChemistryAldehydes and Ketones
Identify the major product of the given reaction.
Correct answer
3
Step-by-step solution
The given reactant is pentan-2-one, which is a ketone. The reaction involves two steps: 1. Nucleophilic addition: The Grignard reagent, methylmagnesium bromide ( CH ₃ MgBr ), provides a methyl nucleophile ( CH ₃^- ). This nucleophile attacks the electrophilic carbonyl carbon of pentan-2-one. The bond of the carbonyl group breaks, transferring electrons to the oxygen atom to form an alkoxide intermediate. CH ₃ CH ₂ CH ₂ C (= O ) CH ₃ + CH ₃ MgBr CH ₃ CH ₂ CH ₂ C ( O ^- MgBr ^+)( CH ₃)₂ 2. Acidic workup: The addition