Xenon tetrafluoride

Xenon tetrafluoride

Names
IUPAC name Xenon tetrafluoride
Identifiers
CAS Number	13709-61-0 N
3D model (Jmol)	Interactive image
ChemSpider	109927 Y
ECHA InfoCard	100.033.858
PubChem CID	123324
InChI InChI=1S/F4Xe/c1-5(2,3)4 Y Key: RPSSQXXJRBEGEE-UHFFFAOYSA-N Y InChI=1/F4Xe/c1-5(2,3)4 Key: RPSSQXXJRBEGEE-UHFFFAOYAW
SMILES F[Xe](F)(F)F
Properties
Chemical formula	XeF 4
Molar mass	207.2836 g mol−1
Appearance	White solid
Density	4.040 g cm−3, solid
Melting point	117 °C (243 °F; 390 K) sublimates
Solubility in water	Reacts
Structure
Coordination geometry	D4h
Molecular shape	square planar
Dipole moment	0 D
Thermochemistry
Std molar entropy (So298)	146 J·mol−1·K−1
Std enthalpy of formation (ΔfHo298)	−251 kJ·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N  (what is YN ?)
Infobox references

Xenon tetrafluoride is a chemical compound with chemical formula XeF
4. It was the first discovered binary compound of a noble gas. It is produced by the chemical reaction of xenon with fluorine, F
2, according to the chemical equation:

This reaction is exothermic, releasing an energy of 251 kJ/mol of xenon.

Xenon tetrafluoride is a colorless crystalline substance under ordinary conditions. Its crystalline structure was determined by both NMR spectroscopy and X-ray crystallography in 1963. The structure is square planar, as has been confirmed by neutron diffraction studies, and is justified by VSEPR theory because xenon has two lone pairs of electrons: one above and one below the plane of the molecule.

Xenon tetrafluoride sublimes at a temperature of 115.7 °C (240.26 °F).

The formation of xenon tetrafluoride, like the other xenon fluorides, is exergonic. They are stable at normal temperatures and pressures. All of them readily react with water, releasing pure xenon gas, hydrogen fluoride, and molecular oxygen. This reaction occurs in slightly moist air; hence, all xenon fluorides must be kept in anhydrous atmospheres.