Organic Chemistry 354 Quiz - October 1, 2001
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- 2. At least one of the reactions above can be used as a simple chemical
test to tell the difference between cyclohexane and cyclohexene.
Select one reaction and then explain how it can serve as a simple chemical test.
- Two reaction could be used as a simple chemical test to differentiate between
cyclohexane and cyclohexene.
- Bromine and carbontetrachloride can be used since the
red bromine reacts
with colorless cyclohexene to give colorless 1,2-dibromocyclohexane.
Bromine does not react with cyclohexane at room temperature and in the dark so the
cyclohexane solution becomes red and stays red. One could represent
- Dilute basic permanganate can also be used since under basic conditions
permanganate reacts with a double bond to give an insoluble black precipitate of
MnO2. One could represent the test
as follows: (Note that while acid permanganate also reacts, MnO2 is
not formed and the colored manganese ions are hard to see.)