Xenon difluoride (XeF2) is formed when a mixture of Xenon and fluorine in the ratio 1 : 3 by volume is passed through a nickel tube at 673 K,
Ni, 673K
Xe + Fe ——––——> XeF2
Structure : XeF2 has trigonal bipyramid geometry due to sp3d
-hybridization of Xe. Three equatorial positions are occupied by lone pairs of electrons giving a linear shape to the molecule.
Properties: XeF2 is a colorless crystalline solid, reacts with H2
to give Xe and HF. It is hydrolyzed completely by water,
2XeFe + 2H2O ———> 2Xe + O2 + 4 HF.
It also forms addition compounds with reactive pentafluorides like SbF5, TaF5 etc.
XeF2 + 2SbF5 ———> XeF2.2SbF5.
It is a mild fluorinating agent and hence reacts with benzene to give fluorobenzene. |
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