Question

Consider the following figure.

Which type of bond formed between metal and ligand?

• A. synergic bond
• B. $\sigma$-bond
• C. $\pi$-bond
• D. None of these

Answer 1

Answer: (A)

The metal-carbon bond in metal carbonyls possess both $\sigma$ and $\pi$-character. The metal to ligand bonding creates a synergic effect which strengthens the bond between Co and the meal.