Question

The number of bridging CO ligands in $\left[{\mathrm{Mn}}_2{\left(\mathrm{CO}\right)}_{10}\right]$is _____.

Answer 1

Calculating the number of metal-metal bonds in the complex:

The total electron count is given as

$$\begin{gathered} =2\times 7+2\times 10 \\ =34 \end{gathered}$$

No. of metal-metal bond

$$\begin{gathered} =\frac{18\times 2-34}{2} \\ =1 \end{gathered}$$

Since without the bridging ligand it follows the 18 electron rule, Hence, the bridging ligand is absent in the complex

The structure of the complex is shown below:

The number of bridging CO ligands in $\left[{\mathrm{Mn}}_2{\left(\mathrm{CO}\right)}_{10}\right]$is zero.