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In chemistry, linkage isomerism or ambidentate isomerism is a form of structural isomerism in which certain coordination compounds have the same composition but differ in which atom of the ligand is bonded to the metal. Typical ligands that give rise to linkage isomers are: cyanide, CN − – isocyanide, NC −; cyanate, OCN − – isocyanate ...
In one isomer the CO ligands are terminal. When a pair of CO are bridging, cis and trans isomers are possible depending on the location of the C 5 H 5 groups. [7] Another example in organometallic chemistry is the linkage isomerization of decaphenylferrocene, [(η 5-C 5 Ph 5) 2 Fe]. [8] [9] Formation of decaphenylferrocene from its linkage isomer
Sulfoxides can bind to metals by the oxygen atom or by sulfur. This dichotomy is called linkage isomerism. O-bonded sulfoxide ligands are far more common, especially for 1st row metals. S-bonded sulfoxides are only found for soft metal centers, such as Ru(II). Complexes with both O- and S-bonded sulfoxide ligands are known. [4]
In coordination chemistry, ligand isomerism is a type of structural isomerism in coordination complexes which arises from the presence of ligands which can adopt different isomeric forms. 1,2-Diaminopropane and 1,3-Diaminopropane are the examples that each feature a different isomer would be ligand isomers.
An example is thiocyanate, SCN −, which can attach at either the sulfur atom or the nitrogen atom. Such compounds give rise to linkage isomerism . Polydentate and ambidentate are therefore two different types of polyfunctional ligands (ligands with more than one functional group ) which can bond to a metal center through different ligand ...
Three linkage isomers are common for nitrite ligands, O-bonded, N-bonded, and bidentate O,O-bonded. The former two isomers have been characterized for the pentamminecobalt(III) system, i.e. [(NH 3) 5 Co−NO 2] 2+ and [(NH 3) 5 Co−ONO] 2+, referred to as N-nitrito and O-nitrito, respectively. These two forms are sometimes called nitro and ...
In this example, the concentration at which the full agonist (red curve) can half-maximally activate the receptor is about 5 x 10 −9 Molar (nM = nanomolar). Two ligands with different receptor binding affinity. Binding affinity is most commonly determined using a radiolabeled ligand, known as a tagged ligand.
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