Structure of Os5(CO)16

The compound Os5(CO)16 is a cluster compound of osmium and carbon monoxide. It has a molecular formula of Os5(CO)16, which indicates that it has five osmium atoms and sixteen carbon monoxide ligands.

Nido Structure

The correct answer to the given question is option B, which states that Os5(CO)16 adopts a nido structure.

A nido structure is a type of polyhedral structure often used to describe boranes and other cluster compounds. It is characterized by a vertex atom that is not surrounded by a complete set of ligands. In the case of Os5(CO)16, the central osmium atom is not surrounded by a complete set of carbon monoxide ligands.

Other Possible Structures

Os5(CO)16 can also adopt other types of structures, depending on the conditions under which it is synthesized. These include:

- Closo structure: In this type of structure, all of the vertex atoms are surrounded by a complete set of ligands.
- Arachno structure: This type of structure is characterized by vertex atoms that are connected by bridging ligands.
- Hypo structure: This type of structure is characterized by a reduced number of vertex atoms compared to the corresponding closo structure.

Conclusion

In summary, Os5(CO)16 is a cluster compound that can adopt different types of structures depending on the conditions of synthesis. The correct answer to the given question is that it adopts a nido structure, which is characterized by a central atom that is not surrounded by a complete set of ligands.