Bromine help

icecool · Insistent Chemist

Ok haha lol so there isn't any big deal when it turns brown.
Just do it quickly and when the carbonate will form still dissolve it in GAA.
And then add bromine dissolved in DCM.
What about adding bromine which is frozen BTW?
It doesn't need to be that cold.
So just pour in a chunck of bromine Laughing

icecool · Insistent Chemist

Did the reaction of making bromine yesterday with 8ml DCM and 2,4g of KBr and 0,97ml H2O2 30% and 16ml 30% H2SO4 and 30ml water.
And it went very nice it does stink a bit like bromine but no fumes.
And well when brominating 2C-H with the DCM+Br method is there also going to be the brown paste crystals after 15min?
Since there wasn't any with SWIM.
Now after 5 hours in the freezer there is a little bit of white crystals on the bottom very fine crystals.
Just SWIM scratched the walls of the beaker with a metal object to initiate crystal formation if that may help...
And now SWIM is leaving it in the freezer for longer time to see if there will form more.
Could toluene (since it is hard to brominate toluene) prevent the bromation of 2C-H when it is dissolved in it.
SWIM only rotavapped the 2C-H+toluene and so there was still a bit of toluene left, and no formation of 2C-H.Ac crystals when adding GAA but that may have happened because the 2C-H was cooled in an salt/ice bath and being stirred magnetically constantelly also no heat evolved with the GAA, there was a temp. rise when brominating from 5°C to 20°C.
No hydrobromic acid fumes or bromine fumes but that'll probably be because it was dissolved in DCM...
Now the mixture consists out of DCM, GAA, 2C-H and Br...
Could the white tiny crystals on the bottom also be 2C-B.HBr?