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Week 7 Solutions - 6 Draw the MO diagram for VH Assume the...

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5. Use the MO model to predict the bond order and magnetism of each molecule. a. Ne 2 b. P 2 Solution: a. The valence orbitals for Ne are 2s and 2p. Ne 2 has 16 valence electrons (8 per atom). The MO diagram for Ne 2 is: The bond order is (8-8)/2=0, so Ne 2 should not exist b. The valence electrons for P are 3s and 3p. P 2 has 10 valence electrons (5 from each phosphorus atom). The MO diagram for P 2 is:
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The bond order is 3 and the molecule is expected to be diamagnetic (because there are no unpaired electrons).
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Unformatted text preview: 6. Draw the MO diagram for VH. Assume the only valence orbitals in V are the 3d orbitals. (In other words, ignore the V 4s orbital). To get the correct answer, it is important to use the coordinate axes shown below. On the Pauling scale, H has electronegativity 2.1 while V has electronegativity 1.6. Is this molecule paramagnetic? What is its bond order? Solution: Below is the correct MO diagram for VH. VH is paramagnetic. Its bond order is 1....
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