fastbre4k - 2-1-2017 at 08:52
Hey,
i tried to preparate Phenyllithium.
in 150ml of Chlorobenzene was added 2g of lithium (fine strips)(from battaries) - then i started a reflux. Within 5 minutes i noticed a color change
from , first light green and then going into dark yellow.
I guess that : https://en.wikipedia.org/wiki/Aryne
PirateDocBrown - 2-1-2017 at 10:31
You dropped the Li directly into the PhCl?
Next time, try a solvent. Dry Et2O or THF, for example.
Sparge your reactant/solvent with inert gas before adding the metal, and exclude atmospheric O2 from the reaction.
You will get better results with PhBr.
Also, a catalytic amount of Na metal has always helped me a bit.
fastbre4k - 2-1-2017 at 11:03
Jea - directly
mhm - next time with solvent - i guess xylene would work?
inert gas i have - N2
draculic acid69 - 24-9-2018 at 05:25
So how did it go with xylene?
S.C. Wack - 24-9-2018 at 13:46
Not well I bet.
It's not an oversight that the directions (edit: e.g. OS CV2 page 517) say bromobenzene and ether (preferably with a bit of sodium) and don't say feel
free to substitute with chlorobenzene and xylene.
[Edited on 24-9-2018 by S.C. Wack]
JJay - 24-9-2018 at 14:15
Phenyllithium will react with xylene, exchanging a benzylic hydrogen per methyl group for lithium. It will also react with toluene.