What set of hybrid orbitals is used by Xe in XeO3F2?

dsp2
d2sp3
sp3
dsp3
d2sp

To determine the set of hybrid orbitals used by Xe in XeO3F2, you need to determine the geometry of the molecule and the number of electron domains around the central Xe atom.

1. Start by drawing the Lewis structure of XeO3F2. The oxidation state of Xe is +6 (6 valence electrons), and O and F have a -2 oxidation state (3 O atoms * 2 electrons each + 2 F atoms * 1 electron each = 10 electrons). Place the atoms in the structure, ensuring Xe is central and all other atoms are bonded to it.

F Xe F
\ | /
O O

2. Count the electron domains around the Xe atom. An electron domain can be a lone pair or a bond, so for XeO3F2, there are a total of five electron domains - three lone pairs and two bonding pairs.

3. Based on the electron domain geometry, determine the hybridization of the central atom.
- If there are two electron domains, the hybridization is sp.
- If there are three electron domains, the hybridization is sp2.
- If there are four electron domains, the hybridization is sp3.
- If there are five electron domains, the hybridization is dsp3.
- If there are six electron domains, the hybridization is d2sp3.

For XeO3F2, there are five electron domains, so the set of hybrid orbitals used by Xe is d2sp3. Therefore, the correct answer is d2sp3.

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