Sciencemadness Discussion Board

Nitrogen tribromide

halogen - 10-8-2004 at 17:04

Nitrogen trichloride + 3KBr --> Nitrogen tribromide + 3KCl.
Nitrogen tribromide is an unstable, dark red liquid, with sensitivity between NI3 and NCl3.
:oIt is definately exotic.
Alternative method:
NH4Br + NaClO2 + 2FeBr3 --> NaCl + 2FeBr2 + NBr3.
Also by electrolysis of NH4I + KBr solution.
Any others?. Other info on NBr3 appreciated.

sylla - 11-8-2004 at 02:35

maybe just Br2 + NH3(aq) as it's done with other halogen.

Of course nitrogen halide are very dangerous but I suppose you know the story...

Pyrovus - 11-8-2004 at 02:54

The direct reaction of bromine with ammonia gives nitrogen gas, not NBr3.

[Edited on 11-8-2004 by Pyrovus]

vulture - 11-8-2004 at 02:56

What are the other products? HBr? NH4Br?

nitrogen polyhalides

halogen - 11-8-2004 at 08:00

How about nitrogen halides consisting of 2 or more different halogens.
NF2Br could be made from Nitrogen trifluoride and ammonium bromide.
NH4Br + NF3 --> N2 + 3HF + HBr
3NH4Br + 3NF3 + 3HF --> 3NF2Br + 3NH4F.HF.
They in theory, could form a class of compounds more stable than the regular NHalides, but still sensitive.
And never mix Tetrafluorohydrazine with salt. No good for your health.
(N2Cl4 vs NCl3)

[Edited on 12-8-2004 by halogen]

JohnWW - 13-8-2004 at 23:24

I have heard of nitrogen tri-iodide being made by dissolving iodine, bought from any pharmacy as a disinfectant, in household ammonia solution (available from either pharmacies or supermarkets). It forms a dark, solid precipitate, which I have heard of being spread onto dance-floors to provide some "action". Like NBr3 and NCl3, it is also explosive, although not as highly.

John W.

Hobbit Porn - 14-8-2004 at 04:22

spread on dance floors?
Aren't iodine vapours produced when nitrogen tri-iodide breaksdown?

Would want to hope you weren't wearing white pants.


halogen - 14-8-2004 at 14:44

It seems as if edison made NBr3.
He was making a mixture of bromine and ammonia to clean the diirty something or others.
Small drops of it were spilled on the heater.
As he sat an the couch with a guest, He heard a few explosions.
He later went back to determine what it was.
"If the entire quantity had exploded, there would have been no remains of me or my laboratory"
He didn't make all too much.
I'm beginning to really enjoy this mysterious substance:).

[Edited on 14-8-2004 by halogen]


S.C. Wack - 14-8-2004 at 16:00

Cotton and Wilkinson:
"The interaction of Br2 and NH3 in solutions more acid than pH 6 gives NBr3 which can be extracted into CHCl3; it decomposes quite rapidly; uv spectra of more alkaline solns suggest the presence also of NH2Br and NHBr2. - Inorg Chem 4, 899 (1965)"

Since the iodide was mentioned, Mellor:
"Although moist NI3.NH3 can be handled without much danger of explosion, the dry cpd is very explosive. Explosions are said to have been produced as a result of the shock of a falling dust particle, and by a fly walking over the dry powder."

FrKoNaLeaSh101 - 14-8-2004 at 23:59

Yes, one of the products of NI3 is I2 vapours. It can be noticed by the puple cloud over the detonation.

halogen - 15-8-2004 at 09:55

My question is how would one stabilise NCl3 or NBr3?
Could you add it to Fe2O3, So that when it detonates, it forms a beautiful orange cloud?
Or possibly mix it with titanium dioxide for thick white clouds?
I think I'm getting carried away...

fvcked - 15-8-2004 at 10:25

I think it would detonate if you tried to add it to anything. Especially Fe2O3 or TiO.