Alpha Halogenation and Related Reactions Quiz

What is the primary goal of alpha halogenation reactions?

• To replace an alpha hydrogen with a halogen

• To add a hydroxyl group to the alpha carbon

• To convert a ketone into an alcohol

• To remove a halogen from the alpha carbon

Which of the following acids is commonly used in acid-catalyzed alpha halogenation?

• Acetic acid

• Hydrochloric acid

• Trifluoroacetic acid

• Sulfuric acid

In acid-catalyzed alpha halogenation, why is mono-substitution more likely than di-substitution?

• Because the reaction is too slow

• Because excess halogen is not used

• Due to the formation of a stable enol

• Because forming more enol is less favorable after the first substitution

What is a key difference between base-promoted and acid-catalyzed alpha halogenation?

• Base-promoted reactions replace all alpha hydrogens with halogens

• Base-promoted reactions require a catalyst

• Acid-catalyzed reactions are faster

• Base-promoted reactions do not require excess base

In base-promoted alpha halogenation, what is necessary for the reaction to proceed?

• Excess halogen only

• Excess base and halogen

• A single equivalent of base

• No base is required

What is the haloform reaction specifically used to identify?

• Aldehydes

• Methyl ketones

• Carboxylic acids

• Alcohols

Which halogen is most commonly used in the haloform reaction?

• Chlorine

• Fluorine

• Bromine

• Iodine

What is the primary purpose of using PBr3 in the HVZ reaction?

• To convert a carboxylic acid into an acid halide

• To add a bromine to the alpha carbon

• To remove an alpha hydrogen

• To neutralize the reaction

In the HVZ reaction, what happens after the formation of the acid halide?

• It undergoes further halogenation

• It forms an alcohol

• It decomposes

• It is converted back to a carboxylic acid

What is the final product of the HVZ reaction?

• A carboxylate

• An alkyl halide

• A carboxylic acid with an alpha halogen

• An ester