Question

$Fe_2(CO)_9$ is diamagnetic. Which of the followingreasons is correct ?

• A. Presence of one CO as bridge group
• B. Presence of monodentate ligand
• C. Metal-metal (Fe-Fe) bond in molecule
• D. Resonance hybridization of CO

Answer 1

Answer: (C)

Metal-metal (Fe-Fe) bond in molecule

Answer 2

Metal-Metal (Fe-Fe) bond pair up the unpaired electron.