# What type of hybridization does phosphorus have in P2O5?

I'm inclined to think that P has a $dsp$ hybridization in that compound, because it makes 5 bonds and 2 of them are $\pi$ bonds - with oxygen. However, I found in some websites that it may have $sp^2$ hybridization, although I have no idea how could it be possible - since it has to make two $\pi$ and 3 sigma bonds.

• Welcome to chemistry.SE! If you had any questions about the policies of our community, please ‎visit the help center. || It's better to ask two separate questions in two separate threads. – M.A.R. Aug 26 '15 at 16:58
• There is only one pi bond to oxygen and four sigma bonds per a phosphorus atom: en.wikipedia.org/wiki/Phosphorus_pentoxide#/media/… – RBW Aug 26 '15 at 17:11
• @Marko and even that $\pi$-bond is not neccessarily there... – permeakra Aug 26 '15 at 17:52
• It has a significant pi character as can be seen by the different bond length between the C=O and C-O bonds. – RBW Aug 26 '15 at 18:17
• It's normal sp3 like in phosphoric - there should dative bond to describe it properly not double. – Mithoron Aug 26 '15 at 18:20