The iodine bromide molecule, IBr, is an interhalogen compound.Assume that the molecular orbitals of IBr are analogous tothe homonuclear diatomic molecule F2. (a) Which valenceatomic orbitals of I and of Br are used to construct the MOs ofIBr? (b) What is the bond order of the IBr molecule? (c) One ofthe valence MOs of IBr is sketched here. Why are the atomicorbital contributions to this MO different in size? (d) What isthe label for the MO sketched below? (e) For the IBr molecule,how many electrons occupy the MO sketched below?

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Quantum Mechanical Treatment of the Valence Bond Theory

Quantum mechanical treatment of valence bond theory refers to the relationship established between the quantum mechanical theory and the valence bond theory to describe the chemical bonding in a particular molecule.