Explain with two examples each of the following: coordination entity, ligand, coordination number, coordination polyhedron, homoleptic and heteroleptic

Explanation

Coordination entity it constitutes of a central atom/ion bonded to fixed number of ions or molecules by coordinate bonds e.g., `[COCl_(3)(NH_(3)_(3)], [Ni(CO)_(4)]` etc
Ligand: The ions/ molecules bound to central atom/ion in coordination entity are called ligands Ligands in above examples are CL, `NH_(3)` CO Coordination number This is the number of bond formed by central atom/ion with ligands Coordination polyhedron Spatial arrangement of ligands defining the shape of complex in above cases Co and Ni polyhedron are octahedral and tetrahedral in `[CoCl_(3)(NH_(3))_(3)]` and `[Ni(CO)_(4)]` respectively Homoleptic: Metal is bound to only one kind of ligands eg Ni in `[Ni(CO)_(4)]`
Heteroletric Metal is bound to more than one kind of ligandseg Coin
`[CoCl_(3)(NH_(3))_(3)]`