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Chapter 7 : Stereochemistry |  |
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Chapter 7 : Stereochemistry | |
Questions regarding
Absolute and Relative Configurations
| Qu 1: | Bromine reacts with alkenes to give dibromides via a stereospecific reaction (see chapter 6) |
| Draw the dibromide products produced by the addition of Br2 to the following alkenes, | |
| (a) propene | |
| (b) Z-2-butene | |
| (c) E-2-butene | |
| Qu 2: | As you will learn later, alkynes can be reduced to alkenes in two different ways. |
| Using the data provided below
and what you learned from Qu 1, deduce the stereochemistry of the two methods
of reduction. A : 2-butyne + H2 + catalyst gives an alkene that reacts with Br2 to give a racemic mixture B : 2-butyne + Na / NH3 gives an alkene that reacts with Br2 to give a single achiral compound. |
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© Dr. Ian Hunt, Department of Chemistry |  |