Isomerizations of coordination compounds

Reactions in which isomerization of coordination compounds occur in solutions are common, and some reactions of this type in solid complexes have been studied. Generally, there is a change in color of the complex as the crystal field environment of the metal ion changes. Accordingly, some of the color changes that occur when complexes are heated may indicate isomerization, but very few geometrical isomerization reactions in solid complexes have been studied in detail. One such reaction is... 

The extensive chemistry of this oxidation state has two facets. The classical complexes containing a-bonded ligands have been known for nearly two centuries. At the beginning of the twentieth century, they were widely used by Alfred Werner in his fundamental research into the constitution, stereochemistry, and isomerism of coordination compounds. 

Most complex ions containing Co, Cr, and Pt are kineticaUy inert. Because they exchange ligands very slowly, they are easy to smdy in solution. As a result, our knowledge of the bonding, structure, and isomerism of coordination compounds has come largely from smdies of these compounds. 

Isomerism Isomers are compounds with the same molecular formula (or the same simplest formula, in the case of ionic compounds) but with different arrangements of atoms. Because their atoms are differently arranged, isomers have different properties. There are many possibiUties for isomerism in coordination compounds. The smdy of isomerism can lead to information about atomic arrangement in coordination compounds. Wauer s research on the isomerism of coordination compounds finally convinced others that his views woe essentially correct. 

Nomenclature, geometrical structure and isomerism of coordination compounds... 

Isomerization of coordination compounds is one important class of thermal transformation. In the case of inert complexes such isomerization may be irreversible and so allow the preparation of specific isomers. Some transformations of this type (e.g. isomerization of square-planar complexes) were introduced in Chapter 1 and additional examples will be discussed in Section 12.10. In this Chapter the use of solid state thermal transformations in synthetic coordination chemistry is discussed. Work on the use of thermal methods as analytical tools in coordination chemistry can be found... 

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