Reaction Summary
Reagents
- Concentrated acidified potassium manganate(VII),
/
Conditions
- Hot, heat under reflux
Catalyst
- None
Chemical Equation
Equation
By-Products
- Depends on the other alkene carbon:
➔ ; ➔
Observations
Observations
- Purple solution turns colourless (
➔ )
⚠️ 9701 Exam Notes / Pitfalls
Warning
- Oxidative cleavage — the C=C breaks completely.
- A ketone only forms from an alkene carbon with two alkyl groups and no H (
). - Exams use this backwards: identify the products to deduce the position of C=C in the original alkene.
- Contrast with cold, dilute acidified
➔ diol (no cleavage).