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CAS No.: | 13709-36-9 |
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Name: | XENON DIFLUORIDE |
Article Data: | 102 |
Molecular Structure: | |
Formula: | F2Xe |
Molecular Weight: | 169.287 |
Synonyms: | Xenondifluoride; Xenon difluoride (XeF2); Xenon(II) fluoride |
EINECS: | 237-251-2 |
Density: | 4.32 g/mL at 25 °C(lit.) |
Melting Point: |
129 °C(lit.) |
Boiling Point: | 114.35°C (estimate) |
Flash Point: | n/a |
Solubility: | Decomposes in water. |
Appearance: | white crystalline solid |
Hazard Symbols: | O,T+,T |
Risk Codes: | 8-25-26-34 |
PSA: | 0.00000 |
LogP: | 0.45960 |
Conditions | Yield |
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In neat (no solvent) Xe and F2 condensed into nickel can (-196°C), warmed (room temp., pressure 34 atm.), preheated electric furnace (400°C) placed around the nickel can (7 h, pressure 78 atm.), quenched to room temp. in water, cooled (-78°C); excess Xe condensed into a storage cylinder (-196°C), evapn. (through a cold trap, -78°C); | 99.3% |
In gas react. temp. of 400°C, Xe:F2 about 2.0, Monel vessel with volume between 95 and 1200 ml; cooling down with H2O;; | >95 |
Electric Arc; react. of F2 with an excess of Xe in an electrical discharge; sublimation in vac., discarding the leading fraction; |
boron trifluoride
fluorine
A
silver tetrafluoroborate
B
xenon difluoride
Conditions | Yield |
---|---|
In hydrogen fluoride HF (liquid); treatment AgF with BF3 in HF, pptn. of AgBF4, adnn. of F2, removal of volatiles, addn. of Hf, BF3 and xenon (condensed in reactor, -100°C), warming to 20°C with stirring (thermal cycling repeated 3-4 times, in 2 h); removal of volatile (vac., -45°C, 5 h), XeF2 (U trap, -78°C); x-ray photography; | A n/a B 66% |
Conditions | Yield |
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With HF In hydrogen fluoride HF (liquid); mixing of AgF2 and BF3 in HF (-100°C), warming(to room temp., stirring), addn. of xenon (stirring 12 h); removal of volatile (-45°C, vac.), XeF2 (U trap, -78°C); x-ray powder photography and Raman spectroscopy; novolatile AgBF4; x-ray powder photography; | A n/a B 57.9% |
heptafluorobutyronitrile
xenon difluoride * AsF5
A
xenon difluoride
B
n-C3F7CNXeF cation
Conditions | Yield |
---|---|
In further solvent(s) BrF5 as solvent, equimolar amts., low temp.,; |
xenon difluoride * AsF5
trifluoroacetonitrile
A
xenon difluoride
B
CF3CNXeF(1+)
Conditions | Yield |
---|---|
In further solvent(s) BrF5 as solvent, equimolar amts., low temp.,; |
xenon difluoride * AsF5
pentafluoropropionitrile
A
xenon difluoride
B
C2F5CNXeF(1+)
Conditions | Yield |
---|---|
In further solvent(s) BrF5 as solvent, equimolar amts., low temp.,; |
Conditions | Yield |
---|---|
With oxygen fluorides on fluorination of Xe by oxygen fluoride;; XeF4 is polluted with XeF2;; | |
on react. of Xe with excess N2F2 (N2F2 : Xe = 2:1) in Monel vessels (24h/90-100°C);; | |
With oxygen fluorides |
Conditions | Yield |
---|---|
In further solvent(s) solvent: anhydrous HF; AgF3 in solvent exposed to large excess of Xe gas at 20 ° C, mixture allowed to ionteract at ca. 20 ° C for 1 h,; tube cooled to -78 ° C,excess Xe and solvent removed under vac.,mixture warmed to ca. 20 ° C,XeF2 on the walls of the tube and AgF2 in the bottom (X-ray powder photograph identical with that of authentic sample); |
hypofluorous acid trifluoromethyl ester
xenon difluoride
Conditions | Yield |
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byproducts: CF3OOCF3; on heating;; | |
byproducts: CF3OOCF3; on heating;; |
Conditions | Yield |
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on exposure of OF2-Xe (1:1) mixtures;; |