Edexcel IAL Chemistry A2 17.4 ligand definition
Edexcel IAL Chemistry A2 17.4 ligand definition
A ligand must donate an electron pair, but it does not have to be negatively charged; use lone pairs to reject species such as ethane or ammonium.
How this is tested
- Define a ligand as an electron-pair donor to a metal ion in a complex.
- Decide whether species such as CO, OH-, amines, ethane or NH4+ can act as ligands.