Alpha Carbon Quiz

What is the mechanism called when a nucleophile adds to the alpha carbon of a ketone?

• Electrophilic addition

• Nucleophilic substitution

• Nucleophilic addition

• Radical addition

During an aldol condensation reaction, what type of bond is formed between two molecules?

• C-C bond

• C-N bond

• C-O bond

• C-H bond

What is the name of the intermediate formed when a ketone is deprotonated at the alpha carbon?

• Carbocation

• Carbanion

• Enolate

• Alkoxide

Which of the following conditions favors the formation of enolates from ketones?

• Acidic conditions

• Neutral conditions

• Basic conditions

• High temperature

Keto-enol tautomerism involves the migration of which atom or group of atoms?

• Hydrogen and a double bond

• A carbonyl group

• A hydroxyl group

• An alkyl group

In keto-enol tautomerism, which form is usually more stable?

• Keto form

• Enol form

• They are equally stable

• Stability depends on the solvent

What is the role of a base in the formation of an enolate from a ketone?

• To donate a proton

• To accept a proton

• To provide a nucleophile

• To stabilize the carbocation

Which of the following is a characteristic reaction of enolates?

• Electrophilic addition

• Nucleophilic substitution

• Nucleophilic addition

• Aldol condensation

What is the product called when two ketone molecules undergo aldol condensation and then dehydration?

• Aldol

• Beta-hydroxy ketone

• Alpha,beta-unsaturated ketone

• Keto-enol

Which of the following statements about keto-enol tautomerism is true?

• It involves the migration of an alkyl group.

• It results in the formation of a new carbon-carbon bond.

• It is an example of nucleophilic substitution.

• It is an equilibrium process between two structural isomers.