Question

3- Pyridinium bromide perbromide is a lachrymator.What does that mean? 4- Draw the four possible stereoisomers of 2,3-dibromo-3-phenylpropanoic acid and assign configurations to the stereocenters.Indicate which pairs of stereoisomers are enantiomers. 5- Draw the mechanism for the bromination of trans-cinnamic acid, using Br2. a) Show both bromonium ions that can form in the first step. b) Show the two additions to each of the bromonium ions you drew in (a).You should have four structures. c) Although you have four structures, they actually represent only two compounds.Identify the structures that are identical? d) Compare the two compounds with the four stereoisomers you drew for question 4.Which stereoisomers will be produced in the reaction you do in lab? 6- If you create the molecular formula for 2,3-dibromo-3-phenylpropanoic acid (CHBrO), you can use the index in the Aldrich Catalog to find this compound.What name does Aldrich give this compound?What is the optical activity of the compound that Aldrich sells?How would you explain this value?Does the entry in the Aldrich Catalog give you information about the stereochemistry of the material?

Answer 1