Asked in ETEA MDCAT 2015 2015Moderate

Select molecule that doesn't have unpaired electrons in anti-bonding molecular orbital's:

Correct answer: C. H2+

  • A. N2-
  • B. Cl2-
  • C. H2+
  • D. O2

Explanation

To determine if a molecule has unpaired electrons in antibonding molecular orbitals, examine the molecular orbital diagrams. In H2+, the antibonding σ orbital contains a single unpaired electron, making it the correct choice. In contrast, N2-, Cl2-, and O2 all have antibonding orbitals with paired electrons, resulting in no unpaired electrons in these molecules.

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