Quiz | Enols – Enolates, and the Aldol Condensation – Part 2

1

The acid catalyzed reaction of Br2 with propanone will lead to which of the following products?

Bromopropanone

Bromomethane and acetic acid

1,3-dibromopropanone

Propionyl bromide

2

Which organometallic reagent results in a 1,4-addition?

RLi

RMgBr

R2CuLi

All of the above

3

Which statement is incorrect about an enolate ion?

An enolate can be formed by a base such as NaOH

An enolate is a good electrophile

An enolate plays a role in the Michael addition

An enolate is the conjugate base of an enol

4

What are the different steps of a Robinson annulation?

1,2-Addition, Intramolecular aldol condensation

Enolization, Aldol dehydration

Michael addition, Intermolecular aldol condensation

Michael addition, Intramolecular aldol condensation, Aldol dehydration

5

What are the two chemical functions of a Michael addition product?

Two alcohols

Two carbonyls

One carbonyl and one alcohol

One carbonyl and one alkene

6

Which statement is correct about the Grignard reagent and α,β-Unsaturated Carbonyls?

The reaction is selective (1,2- OR 1,4-addition) but depends on reagent and substrate structure

The reaction is not selective: we have products from a 1,2-addition AND from 1,4-addition

The reaction is really slow compared to RLi and R2CuLi

The reaction is selective and leads to the formation of the product from a 1,2-addition

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