Question

In which of the following species the highest occupied molecular orbital is o*?
o Не,
O OZ
O N2
О С,​

Answer 1

C2 has highest occupied molecular orbital

Answer 2

In N2 species, the highest occupied molecular orbital is o.

Explanation for the answer:

• The highest occupied molecular orbital (HOMO) in formaldehyde and heteroaldehydes, H2C=E.
• It is the lone pair at E (nE), and the second highest MO (SOMO) is the C = E π-bonding orbital.
• The LUMO is the π*CΕ orbital which comprises the antibonding combination of pz(C) and pz(E).
• The highest occupied molecular orbital in N2 is the sigma 2pz orbital.
• Hence, the correct answer among all the options is N2.

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