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Pre-lab questions for Bromination of trans-Cinnamic Acid to 2,3-dibromo-3-Phenylpropanoic Acid. 1. Why should you add more...

Pre-lab questions for Bromination of trans-Cinnamic Acid to 2,3-dibromo-3-Phenylpropanoic Acid.

1. Why should you add more Br2 to the reaction mixture if it turns colorless during the course of the reaction?

2. Predict the products likely to be formed via the anti- addition of Br2/Dichloromethane to trans- cinnamic acid.

3. Based on your answer to Q2 above, what is the predicted m.p. of the brominated product(s) you will prepare via this method?

4. Would you expect the product mixture you obtain to be optically active? Explain.

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