Problem: The iodine bromide molecule, IBr, is an  interhalogen compound. Assume that the molecular orbitals of IBr are analogous to the homonuclear diatomic molecule F2.One of the valence MOs of IBr is sketched below.Why are the atomic orbital contributions to this MO different in size?

FREE Expert Solution

We have to explain why atomic orbital contributions to the shown molecular orbital differ in size.


We will need the electron configuration of Br and I atoms to determine their valence orbitals so that we can explain the difference in size.


Bromine and iodine belong to group 7A of the periodic table.

 


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Problem Details

The iodine bromide molecule, IBr, is an  interhalogen compound. Assume that the molecular orbitals of IBr are analogous to the homonuclear diatomic molecule F2.

One of the valence MOs of IBr is sketched below.

Two hybridized orbitals are shown, each with one small and one large lobe separated by a dot. The orbitals are arranged side-by-side, with their small lobes nearest each other.  A dashed line separates them.

Why are the atomic orbital contributions to this MO different in size?

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