What Shape Does XeF2 Have?

XeF2 has a Linear molecular geometry (AX2E3, trigonal bipyramidal) with a bond angle of 180° (F–Xe–F). The central xenon carries 2 bonding domain(s) and 3 lone pair(s) — 5 electron domains in total. The three equatorial lone pairs cancel each other and leave the two fluorines exactly opposite.

Hybridisation is conventionally described as sp3d (hypervalent description). Polarity: Nonpolar.

1. Molecular Identity and Key Parameters

Molar mass is the average value rounded for procurement use. Hybridisation labels are the conventional VSEPR-level description; orbital treatment becomes more nuanced at higher levels of theory.

2. Drawing the Lewis Structure of XeF2, Step by Step

1. Count valence electrons: 8 (Xe) + 2×7 (F) = 22 — a total of 22 electrons (11 pairs) must be placed.
2. Build the skeleton: place the xenon at the centre and attach the terminal atoms with single bonds; hydrogen is never a central atom. Each single bond consumes 2 electrons.
3. Complete terminal octets: distribute the remaining electrons as lone pairs on the terminal atoms first (hydrogens already carry their duet from the single bond).
4. Satisfy the central atom: Two Xe–F bonds plus three lone pairs on xenon: five domains in a trigonal bipyramid with all three lone pairs in the equatorial plane.
5. Check formal charges and resonance: Formal charges are zero on all atoms.
6. Verify: Xenon carries ten electrons — period-5 expansion. Apply the standard formal-charge check (valence − nonbonding − half of bonding electrons) to confirm the drawn form.

A worked diagram of this molecule is kept in the companion guide: XeF2 Lewis structure.

3. VSEPR Analysis: Why XeF2 Is linear

VSEPR theory counts electron domains — every σ bond counts once regardless of bond order, and every lone pair counts once. XeF2 has 5 such domains around the xenon: 2 bonding and 3 lone. 5 domains correspond to a trigonal bipyramidal electron-domain arrangement; with 3 lone pairs excluded from the shape the observed molecular shape is linear (AX2E3).

Bond angle: 180° (F–Xe–F) because the three equatorial lone pairs cancel each other and leave the two fluorines exactly opposite.

Polarity: Nonpolar.

4. The Most Common Mistake When Drawing XeF2

5. Why the Geometry Matters in Practice

Mild solid fluorinating agent for organic synthesis and silicon etching; moisture-sensitive and shipped under inert atmosphere.

Structure-level identity is exactly what a purchase order has to fix: the same molecular formula can hide isomers, hydrates or salt forms with different handling profiles. Before ordering, match CAS (13709-36-9), assay, water content and container rating against the datasheet, and request the COA batch that will ship.

Compare Xenon Difluoride (XeF2) supply offers →

6. Quick FAQs on XeF2

7. References

1. IUPAC / Gillespie, Assessment of the VSEPR model. Basis of AXE notation and lone-pair ordering. VSEPR entry
2. PubChem compound record for Xenon Difluoride (XeF2). Registry number, formula and computed descriptors. PubChem 13709-36-9
3. Companion Lewis-structure guide on this site. Worked diagram for XeF2. Lewis structure XeF2