Protium
Harmless
Posts: 27
Registered: 25-12-2004
Location: Point Of Return (Subject To 15% Restocking Fee)
Member Is Offline
Mood: unenlightened
|
|
HBr/HI via HCl ?
I have been entertaining the idea for a while that if one were to dissolve a load of NaI into concentrated HCl(aq) that a mixture of HCl, HI, NaCl,
and NaI would invariably be present, given that they are merely a mixture of dissociated ions.
I then began to think that maybe this could easily be used to produce alkyl iodides from alcohols.
I then began to wonder if NaI/NaBr could be dissolved into DMSO and then dry HCl bubbled through the mixture to produce the same effect. If so, this
might make it easy to brominate/iodinate one's choice of water-insoluble alkene completely OTC.
Any feedback?
It just depends on how you look at it...
|
|
|
chloric1
International Hazard
Posts: 1071
Registered: 8-10-2003
Location: GroupVII of the periodic table
Member Is Offline
Mood: Stoichiometrically Balanced
|
|
EAH! Not really feasible I am afraid. You would rather have an equilibrium. What
you need is to have your iodide/bromide and protonate it with a non-volatile acid that wont oxidize to shift the equilibrium in your favor. Try your
DMSO mix with 85% phosphoric acid if you have access to it. This may work better.
If you are after 57% HI one simple way is to take elemental iodine+ water(equal weights) in a beaker with rapid stirring and bubble in H2S from a H2S
generator. The H2S generator is nothing more than A large test tube or large flask that is stoppered ,with an exit tube, fille with parrafin wax and
sulfur mix. You melt the mixture and YOU GOT GAS!
[Edited on 1/5/2005 by chloric1]
Fellow molecular manipulator
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
