Question

What is the HOMO of $\mathrm{CO}$ molecule?

Answer 1

HOMO of Carbon dioxide $\mathrm{CO}$ molecule:

• HOMO stands for “Highest occupied molecular orbital”.
• The HOMO of $\mathrm{CO}$ molecule is the orbital that puts significant electron density on $\mathrm{CO}$ molecule.
• The HOMO of $\mathrm{CO}$ molecule is ${\mathrm{\sigma P}}_{\mathrm{Z}}$.
• LUMO stands for “Lowest unoccupied molecular orbital”.
• The LUMO of $\mathrm{CO}$ molecule is pi $\left(\mathrm{\pi }\right)$orbital.
• The slight bonding character is present in the non-bonding molecular orbital of $\mathrm{CO}$ molecule.

The molecular orbital diagram of $\mathrm{CO}$ molecule is shown below: