Question

What is the coordination number of chromium in \[\ce{[Cr(NH3)2(H2O2)2]Cl3}\]?

Options

• 3

• 5

• 4

• 6

Answer 1

4

Explanation:

The coordination number of the central metal atom/ion in a complex is the number of ligand donor atoms directly bonded to it. There are 4 ligands attached to Cr so its coordination number is 4.