The number of bridging CO ligand(s) and Co–Co bond(s) in Co₂(CO)₈, respectively are:

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Strategy:
 Recall the specific structure of the dominant isomer of dicobalt octacarbonyl, , at room temperature or in the solid state.

Step 1: Structural features of 
In the solid state and prevalent solution isomer, dicobalt octacarbonyl  exists as a dimeric structure featuring:
- Each cobalt atom is bonded to three terminal  ligands.
- Two  ligands bridge the two cobalt atoms. (-CO).
- To satisfy the 18-electron rule, there is one direct metal-metal bond ().

Step 2: Tabulate the requested nu

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