Here’s a explanation:
Coordination Complex
- A coordination complex is a metal with ligands attached.
- It can be neutral or charged.
- Example: [Co(NH₃)₆]Cl₃ → the part [Co(NH₃)₆] is the coordination complex.
Complex Ion
- A complex ion is a metal with ligands that has a charge.
- Example: [Fe(CN)₆]³⁻ → this is a complex ion because it has a –3 charge.
Simple way to remember:
- Coordination complex → metal + ligands (may be neutral)
- Complex ion → metal + ligands (always charged)