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Give the mechanism of cyanohydrin format...

Give the mechanism of cyanohydrin formation when carbonyl compounds react with HCN in the presence of alkali.
(b) Why `CH_(3)CHO` is more reactive than `CH_(3)COCH_(3)` towards reaction with `HCN`?

Text Solution

Verified by Experts

(a) For mechanism, consult section 8.
(b) This can be explained with the help of both steric and electronic factors. For details, consult section 8.
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DINESH PUBLICATION-ALDEHYDES AND KETONES -Question From Board
  1. (a) Write the reagent used in the following : C(6)H(5)COCH(3)overset...

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  2. Predict the product of the folllowing reaction : CH(3)-underset(CH(...

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  3. How can aromatic aldehydes and ketones be prepared by the following re...

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  4. Explain the structure of carbonyl group.

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  5. Write the structures of A, B, C and D in the following reactions :

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  6. Write the product of the following reaction. CH(3)CH(2)CH=CHCH(2)CNo...

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  7. A and B are functional isomers of compound C(3)H(6)O. On heating with ...

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  8. Draw the structure of semicarbozide of ethanal.

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  9. Why are alpha-hydrogen atom of aldehydes and ketones acidic in nature?

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  10. Oxidation of aldehydes is easier than that of ketones. Explain.

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  11. Write the products of the following reactions : (i) (ii) CH(3)-C...

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  12. Give simple chemical tests to distinguish between Butanal and butan-2-...

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  13. Write the reactions involved in the following : (i) Etard reaction ,...

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  14. Give the mechanism of cyanohydrin formation when carbonyl compounds re...

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  15. Write the IUPAC name of the following compound CH(3)-underset(OCH(2))u...

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  16. Write the structure of the main products of the following reactions :

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  17. Write the structures of the cross-aldol products between ethanal and p...

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  18. Identify the reactiona nd write the IUPAC name of the product formed.

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  19. Ethanal gives Aldol condensation. Give reason.

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  20. Name the oxidising agent in Etard's reaction.

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