Fantasma4500
International Hazard
Posts: 1681
Registered: 12-12-2012
Location: Dysrope (aka europe)
Member Is Offline
Mood: dangerously practical
|
|
Triethyl Borane
so i came across a russian video last night where he mixed up EtOH, H2SO4 and H3BO3, it was then distilled through a plastic tube into a test tube
seated in ice..
decided to try it myself, however i came to read that Et3B is pyrophoric, and some members here states its instantly on contact with air, although the
guy in the video poured the Et3B out onto a steel dish, to thereafter a second or so ignited it with a lighter
i decided to not run the distillation of this intense compound just yet, and have decided to create a much smaller amount disregarding distillation of
it in first go..
could it be cooled down to avoid its pyrophoric properties, perhaps, or is its pyrophoric properties just overrated?? methanol is sadly not otc..
after around 10 minutes a small flask on a hot plate with EtOH, H3BO3 and H2SO4 produced a clear solution of something smelling slightly like EtAc,
removing the aluminium foil lid did not result in spontaneous combustion although still very hot
the vapours from the flask could be ignited, but it didnt seem more violent than ethanol itself, it does burn green however..
is pyrophoric overexaggerated regarding Et3B? it doesnt seem very aggressive at all
|
|
|
Detonationology
Hazard to Others
Posts: 362
Registered: 5-5-2015
Location: Deep South
Member Is Offline
Mood: Electrophillic
|
|
My friend, you have described the reaction for triethyl borate, not borane.
[Edited on 11-6-2015 by Detonationology]
“There are no differences but differences of degree between different degrees of difference and no difference.” ― William James
|
|
|
Fantasma4500
International Hazard
Posts: 1681
Registered: 12-12-2012
Location: Dysrope (aka europe)
Member Is Offline
Mood: dangerously practical
|
|
i did get a slight bit puzzled looking up triethyl borane as i didnt recall the wiki article being that massive
all good, i guess..
thanks a lot!
|
|
|
Detonationology
Hazard to Others
Posts: 362
Registered: 5-5-2015
Location: Deep South
Member Is Offline
Mood: Electrophillic
|
|
It seems pretty difficult to make triethyl borane:
| Quote: |
Triethylborane is prepared by the reaction of trimethyl borate with triethylaluminium:[1]
Et3Al + (MeO)3B → Et3B + (MeO)3Al
The molecule is monomeric, unlike H3B and Et3Al, which tend to dimerize. It has a planar BC3 core.
|
Unless you have some triethylaluminum lying around.
[Edited on 11-6-2015 by Detonationology]
“There are no differences but differences of degree between different degrees of difference and no difference.” ― William James
|
|
|
Fantasma4500
International Hazard
Posts: 1681
Registered: 12-12-2012
Location: Dysrope (aka europe)
Member Is Offline
Mood: dangerously practical
|
|
and precursor is kinda nasty to have laying around..
https://www.youtube.com/watch?v=WN-szfhIOA8
|
|
|
Nicodem
|
Thread Moved
6-11-2015 at 10:12 |
![[*]](images/xpblue/default_icon.gif){kind=icon}
