Sciencemadness Discussion Board

Noble Gas Compounds

Xenos - 30-10-2002 at 17:22

I am slowly working on a science project for a college scolarship and my plan was to attempt to recreate and study noble gas compounds. Here are some links:

http://web.fccj.org/~ethall/2045/xenon.htm
http://www.nidlink.com/~jfromm/elements/noble.htm
http://www.cosmiverse.com/science082403.html
http://physicsweb.org/article/news/4/8/12
http://www.newswise.com/articles/2002/3/NOBLEGAS.OSU.html
http://www.chemsoc.org/exemplarchem/entries/2001/robson/rare...
http://www.public.asu.edu/~jpbirk/CHM-115_BLB/Chpt22/tsld028...
I also found some interesting compounds in the 76th CRC handbook such as:
XeO2F2
XeOF4
XeFRuF6
XeFSb2F11
Xe2F3AsF6
XeF3SbF6
XeF3Sb2F11
XeF5AsF6
XeF5RuF6
and cant forget KrF2 aswell.
Ive been trying to figure these out, and its quite perplexing, but i am determined.
Something like
O
II
F- Xe -F
II
O where Xe has a val. of +6 might work. As far as the more complicated ones go i have yet to figure them out. Anyone have ideas, suggestions, or giant eppiphanies as to the entire electron theory? :P

trinitrotoluene - 30-10-2002 at 21:10

Its still impossable to produce a compound if Helium or Argon.

vulture - 31-10-2002 at 05:31

One thing to keep in mind is that KrF+ is THE strongest oxidizer known to date, even stronger than F2!

Some other compounds you didn't list:

XeF2, colourless crystals which melt at 129C and disproprionate when heated:

2XeF2 -> Xe + XeF4

Can be used to prepare the oxides:
XeF4 + 12H2O -> 4Xe + 3O2 + 2XeO3 + 24HF :o

XeF6, solid, melts at 49,5C.

XeO3, a highly explosive gas, which is an acid anhydride....

Ba3XeO6, almost unsoluble crystals. (note the oxydation state of Xe here is 0)

Na4XeO6.8H2O. Dehydration at 100C, decomposition at 360C. (note oxydation state of Xe here +8)

XeO4, yellow solid, extremely explosive even at very low temperature.

XeCl2, colourless crystals, stable until 80C when anhydrous.

KrF2, colourless crystals, sublime at 0C.

KrF[SbF6] is a complex salt of the KrF+ ion, the strongest known oxidizer, which oxidizes Au to AuF5 and O2 to O2+ :o

ap - 6-11-2002 at 03:30

any idea of the rough reduction potentials for these compounds, like KF+ ?

must be pretty freaking high.


one thing.. how are there 4 fluorines on the LHS, and 24 on the right? or is it just not balanced.
XeF4 + 12H2O -> 4Xe + 3O2 + 2XeO3 + 24HF

vulture - 6-11-2002 at 12:12

Put a 6 in front of XeF4 ...
I am truely ashamed...
:(

ap - 9-11-2002 at 05:29

no problem. i do that sort of thing all the time in my maths tests :P

Marvin - 10-11-2002 at 19:52

I dont see how youd make anything without fluorine, or heavily fluorinated compounds, and elemental fluorine is very very nasty. Graphite spontaneously ignites in it for example....

A lot of the less reactive compounds are unpredictably explosive...

I'm not convinced youd be alowed to try any of them. My preuni project, which I didnt have a choice in, was on the reasons apples turn brown when you cut them open. Maybe I'm just jelous.

ap - 11-11-2002 at 06:18

>>reasons apples turn brown
haha that is a rather amusing project...

its oxidation right? so H2O2 will turn an apple brown / make it catch fire ?