Question

In which one of the following metal carbonyls, CO forms a bridge between metal atoms?

• A. \(\text{[Co}_2(\text{CO})_8]\)
• B. \(\text{[Mn}_2(\text{CO})_{10}]\)
• C. \(\text{[Os}_3(\text{CO})_{12}]\)
• D. \(\text{[Ru}_3(\text{CO})_{12}]\)

Answer 1

The Correct Option is A

In [Co₂(CO)₈], the CO ligands form bridging bonds between the cobalt (Co) atoms. This bridging CO coordination is a characteristic feature of [Co₂(CO)₈], where two cobalt atoms are connected via CO ligands that act as bridges.

The structures of each option are as follows:

• (1) [Co₂(CO)₈] - Contains bridging CO between Co atoms.
• (2) [Mn₂(CO)₁₀] - No bridging CO.
• (3) [Os₃(CO)₁₂] - No bridging CO.
• (4) [Ru₃(CO)₁₂] - No bridging CO.

Thus, [Co₂(CO)₈] is the correct answer where CO forms a bridge between metal atoms.

So, the correct answer is : Option (1)