[Excelinthewall]

I have a problem with iodine pentoxide  (I2O5): I know how the molecolar is , but i don't understand how the Iodine have a ibridation sp3 with a elettronical configuration 4d10 5s2 5p5 . Can someone help me? i hope it

happy new years everybody and good chemistry
(I'm sorry for my bad english )

[Schrödinger]

Count the number of sigma bonds and number of lone pairs on each iodine atom, and see how all of them can be arranged with respect to each other.

[AWK]

I have a problem with iodine pentoxide  (I2O5): I know how the molecolar is , but i don't understand how the Iodine have a ibridation sp3 with a elettronical configuration 4d10 5s2 5p5 . Can someone help me? i hope it

happy new years everybody and good chemistry
(I'm sorry for my bad english )

In my opinion you are quite right. Geometry of iodine pentoxide is far from tetrahedral arrangement of orbitals but often (incorrectly) chemists use sp3 as synonym of tetrahedral

see paper on its crystal structure:
http://actachemscand.org/doi/10.3891/acta.chem.scand.24-1912

[aieeee]

here's a trick for it.
we know , I₂O₅ is an anhydride of iodic acid (HIO₃). thus , hybridisation of I will be same in iodic acid as that of the anhydride i.e. sp³.

[Excelinthewall]

so, thank you very much  I resolve my problem .