COMEDK2023Evening ShiftChemistryAldehydes and KetonesActual
What would be the products obtained when a mixture of p-Methoxy benzaldehyde and Methanal are heated with 50 % concentrated Caustic soda solution?
Options
- Ap- Methoxy benzyl alcohol and methanol.
- Bp- Methoxy sodium benzoate and sodium formate
- Cp-Methoxy benzyl alcohol and sodium formate.
- Dp- Methoxy sodium benzoate and sodium acetate.
Correct answer
C. p-Methoxy benzyl alcohol and sodium formate.
Step-by-step solution
The reaction between p-Methoxybenzaldehyde and Methanal in the presence of concentrated aqueous sodium hydroxide (50% NaOH) is a crossed Cannizzaro reaction. In a crossed Cannizzaro reaction involving an aromatic aldehyde and formaldehyde, formaldehyde acts as the reducing agent because it is more reactive towards nucleophilic attack by the hydroxide ion ( OH⁻ ). The mechanism involves the nucleophilic attack of OH⁻ on the carbonyl carbon of formaldehyde to form a hydride donor species, which then transfers a hydri