Xenon nitrate
Xenon nitrate is a transient compound made by reacting xenon difluoride with anhydrous nitric acid.
Production
Attempted production has used this method:[1]
XeF2 + 2HNO3 → Xe(NO3)2 + 2HF
However this decomposes rapidly: Xe(NO3)2 → Xe + O2NOONO2 (an unstable nitrogen peroxide)
XeF2 + HNO3 → FXeNO3 + HF
However a nixed nitrate definitely exists FXeONO2.[1]
This is formed via the reaction:[1]
[FXeOXeFXeF][AsF6] + 2NO2F → FXeONO2 +NO2AsF6.
Purification of FXeONO2 can take place by dissolving in SO2ClF which leaves the nitronium arsenic hexafluoride behind as a solid.[1]
An alternate low yield method to make FXeONO2 is to dissolve xenon diflouride in liquid dinitrogen tetroxide.[1]
Xe2 + NO+ + NO3- → FXeONO2 + NOF at 0°C
This method is inefficient as not much nitrate ion exists in the liquid and the xenon nitrate decomposes.[1]
Properties
FXeONO2 is a white crystalline material.[1]
FXeONO2 is not particularly stable and slowly breaks down at -78°C yielding XeF2.N2O4. This happens on a timescale of several days.[1] At 0°C FXeONO2 has a half life of seven hours decomposing to XeF2.[1]