9 public questions tagged with this topic.
The Cannizzaro reaction occurs in aldehydes that do not contain an α-hydrogen. Acetaldehyde contains an α-hydrogen, so it does not undergo the reaction.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom, Periodicity and relevant Chemistry topic, Topic: Mole concept and periodic trends.
2-Methylpropanal ((CH₃)₂CHCHO) has no α-hydrogens, so it undergoes Cannizzaro reaction, forming 2-methylpropanol ((CH₃)₂CHCH₂OH) and 2-methylpropanoate.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
2-Methylpropanal ((CH₃)₂CHCHO) lacks α-hydrogens, so it undergoes Cannizzaro reaction, forming 2-methylpropanol ((CH₃)₂CHCH₂OH) and 2-methylpropanoate.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
Methanal (HCHO) lacks α-hydrogens, so it undergoes Cannizzaro reaction, forming methanol (CH₃OH) and formate ion.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
3-Phenylpropanal (C₆H₅CH₂CH₂CHO) lacks α-hydrogens, undergoing Cannizzaro reaction to form 3-phenylpropanol (C₆H₅CH₂CH₂CH₂OH) and 3-phenylpropanoate.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
2,2-Dimethylpropanal ((CH₃)₃CCHO) lacks α-hydrogens, undergoing Cannizzaro reaction to form 2,2-dimethylpropanol ((CH₃)₃CCH₂OH) and 2,2-dimethylpropanoate.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
Benzaldehyde (C₆H₅CHO) lacks α-hydrogens, so it undergoes Cannizzaro reaction, forming benzyl alcohol (C₆H₅CH₂OH) and benzoate.
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Physical Properties and Nucleophilic Addition Reactions
Benzaldehyde (C₆H₅CHO) is an aldehyde (positive Schiff’s test) with no α-hydrogens (undergoes Cannizzaro reaction).
Ref: NCERT Class 12 Chemistry > Chapter 12: Aldehydes, Ketones and Carboxylic Acids > Topic: Nomenclature, Structure and Preparation of Aldehydes and Ketones
