# What is the explanation of the structure of H2XeO4?

Using the obsolete VSEPR theory I had a hard time predicting the structure of $$\ce{H2XeO4}$$. So I looked it up. I found the molecule via chemapps.stolaf.edu:

It looks weird to me. I can't explain the molecular structure. Can anyone explain it using more sophisticated theories like molecular orbital theory (MOT)?
I don't know much MOT, yet.

• Interesting, do you know where the structural data (that chemapps.stolaf.edu uses) comes from? Atkins' Chemical principles: the quest for insight, p. 661 (ISBN 978-1-4292-1955-6) depicts xenic acid as tetrahedron, and to the best of my knowledge there is still no single crystal diffraction data available elsewhere. – andselisk May 18 at 6:32
• I knew that oxo-acids of Xe are very unstable and don't really exist. This is the reason that upon hydrolysis of XeFₓ we get oxides of Xe as products and not oxo-acids. – user73099 May 18 at 7:32
• en.wikipedia.org/wiki/Xenic_acid – Nilay Ghosh May 18 at 7:45
• @andselisk Even chemtube 3d shows the same. It computed (predicted) the structure I guess. chemtube3d.com/playground/playground.html – Karthik May 18 at 7:52
• Please note that the VSEPR theory is not obsolete. It has it's limitations, and this is one of them, but if you are applying it within reason, then it is a very useful model. – Martin - マーチン May 29 at 12:50