Reaction of Bromine with Cyclohexane, Cyclohexene, and Benzene

CCA! Volume 5

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Reaction of Bromine with Cyclohexane, Cyclohexene, and Benzene

Cyclohexane, cyclohexene and benzene are added to bromine. Only cyclohexene reacts with bromine under these conditions.


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Voiceover
Three test tubes contain bromine. Cyclohexane is added to the first tube, cyclohexene to the second, and benzene to the third. The red color of bromine vapor disappears from the tube containing cyclohexene. pH paper shows that hydrogen bromide is not produced in this reaction.

Discussion
This sequence demonstrates that alkanes and benzene do not react with bromine in the absence of a catalyst. Alkenes like cyclohexene undergo addition reactions with bromine to produce dibromoalkanes.

Design, Text and Demonstrator:
	Gary Trammell	University of Illinois at Springfield, Springfield, IL 62794

Videographer/Editor:
	Steve Dykema	University of Illinois at Springfield, Springfield, IL 62794

Voice:
	Margaret Biddle	University of Wisconsin - Madison, Madison, WI 53706

Audio Production:
	Greg Minix	University of Wisconsin - Madison, College of Engineering, Madison, WI 53706
	Jerrold J. Jacobsen	University of Wisconsin - Madison, Madison, WI 53706