Question 4.
Draw a simple molecular orbital diagram for the carbon monoxide
(CO) molecule and explain, using an accurate bonding description,
how this molecule can act as a ligand within metal carbonyl
compounds.
Explain why CO possesses one infrared (IR) active vibrational
mode u(CO), whereas, the di-nitrogen molecule,
N2, does not?
Using your bonding description from part (i.),
together with the knowledge that CO ligands contain an IR active
vibrational mode, explain the variations in u(CO)
cm-1 values which arise...