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(a) What is Cannizaro's reaction ? Write its mechanism. (b) Discuss the structure of carbonyl group. |
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Answer» Solution : (a) Cannizaro.s reaction : This reaction is shown by aldehydes having no `alpha`-H-atom. When such an aldehyde is treated with 50% of NaOH or KOH, it undergoes disproportionation to give an ACID and an alcohol. This reaction is called Cannizaro.s reaction. `underset("BENZALDEHYDE")(2C_(6)H_(5)CHO)underset((50%))(NaOH)_((aq)) to underset("BENZYL alcohol")(C_(6)H_(5)CH_(2)OH)+underset("Sodium benzoate")(C_(6)H_(5)COONa)` Mechanism : It involves the following mechanism  
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