Why Does Chelation Occur?
Chelation /ˈKiːˌleɪˈʃən/ Is a Type of Bonding of Ions and Molecules to Metal Ions. It Involves the Formation or Presence of Two or More Separate Coordinate...
Chelation /ˈkiːˌleɪˈʃən/ is a type of bonding of ions and molecules to metal ions. It involves the formation or presence of two or more separate coordinate bonds between a polydentate (multiple bonded) ligand and a single central metal atom.
How does chelation occur?
Chelation means "to grab" or "to bind." When EDTA is injected into the veins, it "grabs" heavy metals and minerals such as lead, mercury, copper, iron, arsenic, aluminum, and calcium and removes them from the body. Except as a treatment for lead poisoning, chelation therapy is controversial and unproved.
Why does the chelate effect occur?
When a chelating ligand replaces several monodentate ligands, the result is an increase in the number of free molecules in the system, meaning a relatively large increase in entropy. This is the major energetic factor driving the chelate effect.
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