JEE Chemistry 2023 Question with Solution

Given: The complexes are $\mathrm{W(CO)_6}$ and $\mathrm{Mn_2(CO)_{10}}$.

Find: The sum of bridging carbonyl ligands in these two complexes.

For determining bridging carbonyls, examine the geometry and bonding of each complex. Bridging carbonyls are shared between two metal centers, while terminal carbonyls are bonded to a single metal atom.

In $\mathrm{W(CO)_6}$, tungsten hexacarbonyl has octahedral geometry and all carbonyl ligands are terminal. Therefore, the number of bridging carbonyls is $0$.

In $\mathrm{Mn_2(CO)_{10}}$, manganese decacarbonyl has a metal-metal bond and all carbonyl ligands are terminal in its structure. Therefore, the number of bridging carbonyls is $0$.

So, the total is

$$0 + 0 = 0$$

Therefore, the required sum of bridging carbonyls is $0$.