Question

1. Write short note on the following:

i). Cannizzaro Reaction

ii). Cross Aldol Condensation

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Answer 1

Answer:

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Answer 2

Answer:

Cannizzaro reaction: The disproportionationreaction of aldehydes without α-hydrogens in presence of a strong base to furnish an alcohol and a carboxylic acid is called Cannizzaro reaction. One molecule of aldehyde is reduced to the corresponding alcohol, while a second one is oxidized to the carboxylic acid.

Aldol condensation between two different aldehydes or two ketones or between one aldehyde and one ketone is called crossed aldol condensation. ... Suchcondensation gives mixture of four products which are difficult to separate.