what are the aldol condensation reactions and canizaros reaction?
Asked by Gundeep Singh | 7th Jan, 2012, 04:34: PM
Expert Answer:
Aldol Reaction: This reaction takes place between two molecules of carbonyl compounds; one molecule should have at least two a-hydrogen atoms. In this reaction best result is obtained when
Both molecule are the same or one should have no ?-hydrogen atom and other should have at least two ?-hydrogens.
The reaction is two step reaction. First step is aldol formation and second step is dehydration of aldol.
Cannizzaro reaction
It involves a reaction with aldehydes which have no alpha hydrogen atoms. It is a disproportionate reaction.
KOH
2C6 H5 CHO ?C6H5 CH2 OH + C6 H5 COOK
Benzaldehyd Benzl alcohol Potassium benzoate
Aldol Reaction: This reaction takes place between two molecules of carbonyl compounds; one molecule should have at least two a-hydrogen atoms. In this reaction best result is obtained when
Both molecule are the same or one should have no ?-hydrogen atom and other should have at least two ?-hydrogens.
The reaction is two step reaction. First step is aldol formation and second step is dehydration of aldol.
Cannizzaro reaction
It involves a reaction with aldehydes which have no alpha hydrogen atoms. It is a disproportionate reaction.
KOH
2C6 H5 CHO ?C6H5 CH2 OH + C6 H5 COOK
Benzaldehyd Benzl alcohol Potassium benzoate
Answered by | 8th Jan, 2012, 12:38: PM
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