Question

Using VSEPR theory, predict the probable structure of XeF₂.

Answer 1

1. Xenon (Xe) has 8 valence electrons; 2 electrons form bonds with fluorine atoms (2 bonds).
2. The remaining 6 electrons form 3 lone pairs around Xe.
3. Total regions of electron density is 5 (2 bond pairs + 3 lone pairs).
4. The geometry is trigonal bipyramidal; lone pairs occupy equatorial positions.
5. Bond pairs are linear, resulting in a linear molecular shape for XeF₂.
6. Hybridisation of Xe is sp³d.

Hence, XeF₂ is a linear molecule with 180° \[\ce{F - Xe - F}\] bond angle.