![]() Online corrected version: (2006–) 'chelation'. ^ IUPAC, Compendium of Chemical Terminology, 2nd ed.Online corrected version: (2006–) 'µ- (mu) in inorganic nomenclature'. Online corrected version: (2006–) 'bridging ligand'. Online corrected version: (2006–) 'η (eta or hapto) in inorganic nomenclature'. Online corrected version: (2006–) 'κ (kappa) in inorganic nomenclature'. 'Stereochemistry of Coordination Compounds' John Wiley: Chichester, 1995. Online corrected version: (2006–) 'denticity'. Stability constants are a quantitative measure to assess the thermodynamic stability of coordination complexes. jfontana April 21, 2023, 1:07pm 1 I tried my best following the instructions in ( GitHub - pilotmoon/PopClip-Extensions: Documentation and source code for PopClip extensions.) but I failed. Polydentate ligands such as hexa- or octadentate ligands tend to bind metal ions more strongly than ligands of lower denticity, primarily due to entropic factors. In general, the stability of a metal complex correlates with the denticity of the ligands, which can be attributed to the chelate effect. PopClip - Instantly copy & paste, access actions like search, spelling, dictionary and more. They are particularly useful for binding lanthanide ions, which typically have coordination numbers greater than 6. The ligands 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate (DOTA) and diethylene triamine pentaacetate (DTPA) are octadentate. Ligands of denticity greater than 6 are well known.Hexadentate ligands bind with six atoms, an example being EDTA (although it can bind in a tetradentate manner).Pentadentate ligands bind with five atoms, an example being ethylenediaminetriacetic acid.On an octahedral metal these leave two vacant sites opposite each other. ![]() ![]() Many naturally occurring macrocyclic ligands are tetradentative, an example being the porphyrin in heme. Please feel free to start a new topic on anything PopClip-related and use the default. I have now set up several categories for topics, but don’t worry too much about picking the right one. Congratulations on being one of the first people to visit Please do sign up, post, reply, click likes and help make it feel populated. tris(2-aminoethyl)amine, are more constrained, and on octahedra leave two cis sites (adjacent to each other). I’ve created this forum for people to talk about PopClip. For octahedral metals, the linear tetradentate trien can bind via three geometries. ![]() For different central metal geometries there can be different numbers of isomers depending on the ligand's topology and the geometry of the metal center.
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