ChemMang (Newbee)
10-29-03 06:08
No 467445
       Bromination of 2CH w/ KBr+H2O2+H2SO4     

SWIM used 4g 2CH in 4g GAA, mixed in seperate beaker 5.71g KBr, 4.7g H2SO4 chilled and slowly added w/ icebath 18g H2O2 3% Aqueous mixture (SWIM thinks that was a BIG NO NO)...anyhow let this chill and sit for a while w/ magstirrer for a while.  the solution is now blackish bromine dark brown and stinks of acid/bromine.  perhaps I SWIM should chill and see if anything precipitates from this mess of a synth.  Anyhow lemme know whatcha bees think. Thanks in advance
-Fu
'A Helpful Bee, is a Friend Indeed' 		 
 
 
 
    amine
(Stranger)
10-29-03 07:40
No 467462
       try using a more concentrated solution of H2O2     

try using a more concentrated solution of H2O2 the next time you do the iodination.  Try freezing it to see if u get any crystals. Good luck (not exactly sure how u would go about seperating the 2CH from the 2CB)

I am sure someother bee is more skilled. 		 
 
 
 
    ChemMang
(Newbee)
10-31-03 00:49
No 467889
       Success     

SWIM used Bandil the Bromine Bandit's advice and attempted w/o Br2 an rxn involving GAA+H2SO4+KBr+H2O2+2CH... Well what i didnt mention above it that
SWIM added a buncha epsom salts to the water H2O2 and was able to deaquify it quite a bit which SWIM imagines helped in the rxn.  Thanks again to Bandil true warrior against ignorant pigs/associates!
'A Helpful Bee, is a Friend Indeed' 		 
 
 
 
    Oxygen
(Stranger)
11-01-03 11:20
No 468093
       2C-B/2C-H info     

2C-B HBr is soluble in water but not very soluble in GAA.  I don't know how soluble 2C-H HBr is in GAA or water.  2C-B HCl is hardly water soluble, while 2C-H HCl dissolves easily in water.  Forming the HCl salts in aqueous solution makes separating them easy.  Does anyone know what solvent might be used for recrystalization of 2C-B HCl?
lalalalalalala 		 
 
 
 
    Rhodium
(Chief Bee)
11-01-03 17:07
No 468130
       Recrystallization of 2C-B.HCl     

IPA/Toluene 1:1 - ../rhodium /2cb.beaker.html 		 
 
 
 
    amine
(Hive Bee)
04-27-04 04:20
No 503237
       Proceedure     

Does anyone seem to have the proceedure for this reaction using the KBr salt? (ie specifics for successful brominationa..etc) Swim has been searching (manually) and is unable to find it. Also what are the yields like compare to elemental bromine?

thx.

Swim is also wondering about the oxone, swim about an 1lb of  oxone sitting around however swim, finds that neither the oxone nor the sodium bromide dissolve in the Methanol...