Use the MO diagram to calculate the Bond order for the following Chemical Specie

Question

Use the MO diagram to calculate the Bond order for the following Chemical Species? Which of these chemical species is stable, according to (or as predicted by) molecular orbital theory? How did you know this or how were you able to determine this? Which is the most stable (as predicted by MO theory)? Are there any chemical species that would be attracted to a magnetic field? How were you able to determine this? ***Extra credit: Use Valence Bond Theory to describe which atomic orbitals overlap in N_2. Draw a bonding scheme that shows the atomic orbitals overlapping.

Explanation / Answer

1. Calculation of bond order for,

A. He He+ = 1/2(2-1) = 0.5

B. F2 = 1/2(6-4) = 1.0

C. F- F- = 1/2(6-6) = 0

D. F+ F- = 1/2(6-4) = 1.0

2. Looking at the bond order values we can say that, F2 and F+ F- are stable. Fractional bond and 0 bond order orders represent less stable or no bond molecules.

3. Most stable of these would be F2.

4. He He+ will have one unpaired electron and this will thus be attracted to magnetic field, that is paramagnetic.

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