What Shape Does XeF4 Have?

XeF4 has a Square planar molecular geometry (AX4E2, octahedral) with a bond angle of 90° (cis F–Xe–F) and 180° (trans). The central xenon carries 4 bonding domain(s) and 2 lone pair(s) — 6 electron domains in total. The two lone pairs take trans positions to minimise repulsion, flattening the four fluorines into a square plane.

Hybridisation is conventionally described as sp3d2. Polarity: Nonpolar (the trans lone pairs and square symmetry cancel the bond dipoles).

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 XeF4, Step by Step

1. Count valence electrons: 8 (Xe) + 4×7 (F) = 36 — a total of 36 electrons (18 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: Four Xe–F bonds plus two lone pairs occupying opposite (trans) vertices of an octahedron.
5. Check formal charges and resonance: Formal charges zero throughout.
6. Verify: Xenon carries twelve electrons. 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: XeF4 Lewis structure.

3. VSEPR Analysis: Why XeF4 Is square planar

VSEPR theory counts electron domains — every σ bond counts once regardless of bond order, and every lone pair counts once. XeF4 has 6 such domains around the xenon: 4 bonding and 2 lone. 6 domains correspond to a octahedral electron-domain arrangement; with 2 lone pairs excluded from the shape the observed molecular shape is square planar (AX4E2).

Bond angle: 90° (cis F–Xe–F) and 180° (trans) because the two lone pairs take trans positions to minimise repulsion, flattening the four fluorines into a square plane.

Polarity: Nonpolar (the trans lone pairs and square symmetry cancel the bond dipoles).

4. The Most Common Mistake When Drawing XeF4

5. Why the Geometry Matters in Practice

Fluorinating reagent in energetic-material and specialty inorganic synthesis; violent with water, so packaging and dry-room clauses are mandatory.

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 (13709-61-0), assay, water content and container rating against the datasheet, and request the COA batch that will ship.

Compare Xenon Tetrafluoride (XeF4) supply offers →

6. Quick FAQs on XeF4

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 Tetrafluoride (XeF4). Registry number, formula and computed descriptors. PubChem 13709-61-0
3. Companion Lewis-structure guide on this site. Worked diagram for XeF4. Lewis structure XeF4