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Ethylenediamine ligand chelating to a metal with two bonds Cu 2+ complexes with nonchelating methylamine (left) and chelating ethylenediamine (right) ligands. The chelate effect is the greater affinity of chelating ligands for a metal ion than that of similar nonchelating (monodentate) ligands for the same metal.
Carbon monoxide is the preeminent example a ligand that engages metals via back-donation. Complementarily, ligands with low-energy filled orbitals of pi-symmetry can serve as pi-donor. Metal–EDTA complex, wherein the aminocarboxylate is a hexadentate (chelating) ligand Cobalt(III) complex containing six ammonia ligands, which are monodentate ...
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.
Three coordination modes for 2-aminocarboxylates and related ligands. Most commonly, amino acids coordinate to metal ions as N,O bidentate ligands, utilizing the amino group and the carboxylate. They are "L-X" ligands. A five-membered chelate ring is formed. The chelate ring is only slightly ruffled at the sp 3-hybridized carbon and nitrogen ...
The spectrochemical series is an empirically-derived list of ligands ordered by the size of the splitting Δ that they produce. It can be seen that the low-field ligands are all π-donors (such as I −), the high field ligands are π-acceptors (such as CN − and CO), and ligands such as H 2 O and NH 3, which are neither, are in the middle.
Chelation therapy is a form of medical treatment in which a chelating ligand [note 2] is used to selectively remove a metal from the body. When the metal exists as a divalent ion, such as with lead , Pb 2+ or mercury , Hg 2+ selectivity against calcium , Ca 2+ and magnesium , Mg 2+ , is essential in order that the treatment does not remove ...
Two tridentate ligands may form a complex with such an atom. There are two possible arrangements for such a complex: fac where the coordination is in a triangle on one face of the octahedron, and mer where the coordinating atoms are in an arc around the central atom, with two atoms of the ligand opposite each other.
The allyl ligand is commonly in organometallic chemistry.Usually, allyl ligands bind to metals via all three carbon atoms, the η 3-binding mode.The η 3-allyl group is classified as an LX-type ligand in the Green LXZ ligand classification scheme, serving as a 3e – donor using neutral electron counting and 4e – donor using ionic electron counting.