Question: The iodine bromide molecule, IBr, is an inter-halogen compound. Assume that the molecular orbitals of IBr are analogous to the homo nuclear diatomic molecule F2.

The iodine bromide molecule, IBr, is an inter-halogen compound. Assume that the molecular orbitals of IBr are analogous to the homo nuclear diatomic molecule F2.
(a) Which valence atomic orbitals of I and of Br are used to construct the MOs of IBr?
(b) What is the bond order of the IBr molecule?
(c) One of the valence MOs of IBr is sketched here. Why are the atomic orbital contributions to this MO different in size?
(d) What is the label for the MO?
(e) For the IBr molecule, how many electrons occupy the MO?

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a 1 5s 5p x 5p y 5p z Br 4s 4p x 4p y 4p z b By analogy to F 2 the BO of IB... View full answer

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