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Chelation (/ k iː ˈ l eɪ ʃ ən /) is a type of bonding of ions and their 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.
Chelating resins are a class of ion-exchange resins.They are almost always used to bind cations, and utilize chelating agents covalently attached to a polymer matrix. Chelating resins have the same bead form and polymer matrix as usual ion excha
The structure of the complex of sodium (Na +) and the antibiotic monensin A Structure of a potassium complex of a crown ether, a synthetic ionophore-ion complex. Biological activities of metal ion-binding compounds can be changed in response to the increment of the metal concentration, and based on the latter compounds can be classified as "metal ionophores", "metal chelators" or "metal ...
Chelex 100 is a chelating material from Bio-Rad [1] used to purify other compounds via ion exchange.It is noteworthy for its ability to bind transition metal ions.. It is a styrene-divinylbenzene co-polymer containing iminodiacetic acid groups.
This enhanced stability, called the chelate effect, is usually attributed to effects of entropy, which favors the displacement of many ligands by one polydentate ligand. Related to the chelate effect is the macrocyclic effect. A macrocyclic ligand is any large ligand that at least partially surrounds the central atom and bonds to it, leaving ...
In coordination chemistry, the bite angle is the angle on a central atom between two bonds to a bidentate ligand. This ligand–metal–ligand geometric parameter is used to classify chelating ligands, including those in organometallic complexes.
CHELATION THERAPY—WHEN not used correctly—could lead to drops in calcium, iron, and magnesium, Roach says. The NCCIH suggests it could also potentially cause kidney damage.
The chelate effect increases as the number of chelate rings increases. For example, the complex [Ni(dien) 2 )] 2+ is more stable than the complex [Ni(en) 3 )] 2+ ; both complexes are octahedral with six nitrogen atoms around the nickel ion, but dien ( diethylenetriamine , 1,4,7-triazaheptane) is a tridentate ligand and en is bidentate.