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Identify the reagent for the conversion of but-2-ene to ethanal.

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in Chemistry – Class 12 by (188k points)
Identify the reagent for the conversion of but-2-ene to ethanal.

(a) O3/H2O-Zn dust

(b) H2O, H2SO4, HgSO4

(c) PCC

(d) DIBAL-H

The question was asked during an internship interview.

The question is from Preparation of Aldehydes and Ketones in portion Aldehydes, Ketones and Carboxylic Acids of Chemistry – Class 12

1 Answer

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Correct choice is (a) O3/H2O-Zn dust

Explanation: But-2-ene on ozonolysis followed by reaction with water and zinc dust gives ethanal or sometimes a mixture of an aldehyde and ketone depending on the substitution pattern.

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