Toluene + Bromine Mix: Reaction Test Results

[apchemstudent]

I mixed toulene + bromine and dichloromethane together, to see if a reaction occurs(decolourizes). However, i read in my lab manual that this test should be negative for aromatics. So is toluene suppose to be negative as well? If so i think something went wrong with my experiment. Thanks.

 

[GCT]

What they meant by aromatic was probably benzene, toulene will react with bromine under appropriate conditions, for instance through a light catalyzed pathway...however its the methyl group which will react, not the aromatic ring.

 

[ravenprp]

Based on your description, it seems like something may have gone wrong with your experiment. Toluene is a type of aromatic compound, so it should not have reacted with bromine in the presence of dichloromethane. However, if your test resulted in a decolorization, it could indicate that a reaction did occur.

Possible sources of error could include not properly measuring or mixing the chemicals, using contaminated equipment, or not following the correct procedure outlined in your lab manual. It may be helpful to review the steps you took and try the experiment again to see if you get the same results.

It's also possible that your lab manual may have a typo or error in the instructions, so you may want to double check with your instructor or do some additional research to confirm the expected results for this test.

Overall, it's important to carefully follow the instructions and take note of any unexpected results in order to accurately interpret the outcome of your experiment. Good luck!