Bonding in Heteronudear Diatomic Molecules

The MO energy-level diagram for the NO molecule. We assume that orbital order is the same as that for hk The bond order is 2.5. 

Experimentally, nitric oxide is indeed found to be paramagnetic. Note that this odd-electron molecule is described very naturally by the MO model. In contrast, the LE model, in the simple form used in this text, does not readily describe such molecules. 

Use the MO model to predict the magnetism and bond order of the N0+ and CN ions. 

The NO+ ion has 10 valence electrons (5 + 6 — 1). The CN ion also has 10 valence electrons (4 + 5 + 1). Both ions are therefore diamagnetic and have a bond order of 3  

The electron probability distribution in the bonding MO of the HF molecule. Note the greater electron density close to the fluorine atom. 

---