Question

Ozonolysis of alkenes followed by the reaction with zinc dust and water gives ____________ depending on the substitution pattern of the alkene.

Options

• aldehyde

• any of these

• a mixture of both aldehyde and ketone

• ketone

Answer 1

Ozonolysis of alkenes followed by the reaction with zinc dust and water gives any of these depending on the substitution pattern of the alkene.

Explanation:

Reductive ozonolysis yields aldehyde or ketone depending on the nature of the alkene.

For example, CH₂ = CH₂ on reaction with O₃/Zn will give 2 molecules of HCHO while CH₃C(CH₃) = CHCH₃ on the reaction with O₃/Zn will give one molecule of propanone and one molecule of acetaldehyde, and CH₃C(CH₃) = C(CH₃)CH₃ on reaction with O₃/Zn will give 2 molecules of propanone.