51LB%20Exp3%20S11%20Bromination

51LB%20Exp3%20S11%20Bromination - EXPERIMENT 3...

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EXPERIMENT 3 STEREOCHEMISTRY OF BROMINE ADDITION TO TRANS -CINNAMIC ACID REACTION: Bromination of an Alkene TECHNIQUES: Microscale Reflux, Recrystallization In this experiment, we will learn how experimental results can be used to propose a reaction mechanism. Specifically, we will study the mechanism of addition to an alkene using trans - cinnamic acid. READING ASSIGNMENT: “Modern Projects. .”, pp. 139-142 Review any necessary techniques. Supplementary information in Janice Gorzynski Smith (2 nd ed), Chapter 10, pp. 381-384. PRE-LAB ASSIGNMENT: 1. Write a mechanism to illustrate what will happen if the addition of bromine to trans-cinnamic acid is anti ; what is the melting point of the anti addition? 2. Write a mechanism to illustrate what will happen if the addition of bromine to trans -cinnamic acid is syn ; what is the melting point of the syn addition? 3. Describe the melting point you expect to observe if the isolated product is the mixture of both syn and anti addition of bromine. (There are three possible types of
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51LB%20Exp3%20S11%20Bromination - EXPERIMENT 3...

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