POC-I carbonyl compounds

Remembering:What is the Cannizzaro reaction?

• 1. Conversion of aldehydes into carboxylic acids and alcohols in the presence of a strong base
• 2. Oxidation of aldehydes into carboxylic acids in the presence of an oxidizing agent
• 3. Reduction of aldehydes into alcohols in the presence of a reducing agent
• 4. Conversion of aldehydes into ketones in the presence of a nucleophilic catalyst

Remembering:Which of the following is a common strong base used in the Cannizzaro reaction?

• 1. NaCl
• 2.. NaOH
• 3. Na2CO3
• 4. NaHCO3

Remembering:What are the main products of the Cannizzaro reaction?

• 1.Carboxylic acids and esters
• 2. Aldehydes and ketones
• 3. Alcohols and ethers
• 4. Carboxylic acids and alcohols

Understanding: Which step of the Cannizzaro reaction involves the transfer of a hydride ion from the aldehyde to the carbonyl carbon?

• 1. Deprotonation
• 2. Protonation
• 3. Oxidation
• 4. Reduction

Understanding: Why do aromatic aldehydes undergo the Cannizzaro reaction more slowly than aliphatic aldehydes?

• 1. They have more stable carbonyl groups
• 2. They are less reactive towards nucleophiles
• 3. They have less stable carbonyl groups
• 4. They are more reactive towards electrophiles

Understanding: What is the role of the strong base in the Cannizzaro reaction?

• 1. To protonate the aldehyde
• 2. To reduce the aldehyde
• 3. To deprotonate the aldehyde
• 4. To oxidize the aldehyde

Applying: Predict the major products of the Cannizzaro reaction for the following reaction: 2-phenylpropanal + NaOH.

• 1. 2-phenylpropanoic acid and 2-phenylpropanol
• 2. Benzoic acid and benzyl alcohol
• 3. Benzene and ethanol
• 4. Propanal and propanol

Applying: Which of the following aldehydes is expected to undergo the Cannizzaro reaction more slowly?

• 1. Formaldehyde
• 2. Acetaldehyde
• 3. Benzaldehyde
• 4. Propionaldehyde

Applying: Which of the following reagents can be used to convert 2-nitrobenzaldehyde into 2-nitrobenzoic acid?

• 1. HNO3
• 2. NaOH
• 3. Na2SO3
• 4. NaBH4