Bromine Addition to trans-Cinnamic Acid Stereochemistry Flashcards
1
Q
what are the safety hazards of this experiment?
A
-Bromine is a strong respiratory hazard and is very reactive.
- glacial acetic acid is highly concentrated and can causes severe burns
2
Q
why does the color of the solution change from a red brown to a light orange?
A
the bromine is reacting via anti addition with the trans-cinnamic acid to form 2,3-dibromo-phenylpropanoic acid
3
Q
Why is cyclohexane added in the experiment?
A
cyclohexane will react with any excess bromine that is then soluble in the dichloromethane solvent
4
Q
how does 1-2 drops of water induce crystal formation
A
it will cool down the hot solution and supersaturate it, allowing for crystal formation to begin
