5
Question
In the following species, the one which is likely to be the intermediate during benzoin condensation of benzaldehyde is
In the following species, the one which is likely to be the intermediate during benzoin condensation of benzaldehyde is
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Solution
The correct option is C
Correct option is: c
Which benzaldehyde is heated with aqueous ethanoic NaCN or KCN, it dimerises to form an α− hydroxy ketone called benzoin and this reaction is formed as benzoin condensation.
It involves self condensation of an aromatic aldehyde in the presence of HCN.
Mechanism of Benzoin reaction:
1. Nucleophilic addition of cyanide
2. Nulceophilic addition of carbanion
3. Removal of cyanide
Hence, option (c) is correct.
Correct option is: c
Which benzaldehyde is heated with aqueous ethanoic NaCN or KCN, it dimerises to form an α− hydroxy ketone called benzoin and this reaction is formed as benzoin condensation.
It involves self condensation of an aromatic aldehyde in the presence of HCN.
Mechanism of Benzoin reaction:
1. Nucleophilic addition of cyanide
2. Nulceophilic addition of carbanion
3. Removal of cyanide
Hence, option (c) is correct.
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