Stereochemistry of bromine addition
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- Опубліковано 28 вер 2024
- Bromine reacts with an alkene to make a dibromide. The product of the reaction is expected to have "anti" stereochemistry. In this experiment, an alkene is brominated and the melting point of the product is obtained. The melting point can be used to confirm the anti-addition of bromine to the alkene.
The following lab techniques are demonstrated:
Addition under reflux
Recrystallization
Melting point determination
I still love watching your videos. Even though I am in AZ and graduated in 2014 and now teach HS chemistry, they are good soothing videos to watch.
I have so much respect for all you secondary teachers!! Keep inspiring our future scientists :)
Commenting on my own video wondering what the heck is up with the 9 thousand water bottles on the benchtop 😂
😭you didn’t have to come after bromine like that. I love my halogens 😭
lol... they don't love you back.
Thank you for your excellent and well explained video, 10 m mole of both reactants trans-cinnamic acid and bromine solution. But, my expectation is both syn- and anti- addition producst are obtained with major ratio of anti- addition which is Erythro- isomer which has higher melting point. Also, bromine solution in dichloromethane may work better as there is some issue with bromine in acetic acid solution due to formation of stable complex.
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can you explain how the recrystallization part was set up with the vacuum filtration? thanks.
Sure! Are you asking for clarification on setting up the vacuum filtration apparatus?
@@RoxiHulet yes i have organic chemistry iii lab thursday working on this experiment so I'm working out the prelab. The vacuum filtration setup is a bit confusing. Thanks 🥰
@@jayliu7786 Check out this video, skip ahead to about 10:30. Let me know if you have more questions! I'm happy to answer them for you. ua-cam.com/video/2Hz9efI6dLQ/v-deo.html
@@RoxiHulet thanks so much for the insight 🥰
@@jayliu7786 Good luck with your lab!