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There are various types of reactions of metals
coordination complexes. These can be described as association
and dissociation, substitution, oxidation and reduction, insertion
and elimination, and oxidative addition and reductive elimination.
This page aims to categorise each of the above reaction types,
and list how the total number of electrons in the complex, the
oxidation state of the metal and its d-electron count change over
the course of the process. An example of each reaction type is
also given.
| Association
and Dissociation |
| |
|
| Electron Number (EN) |
p (eg. 16) |
p+2 (eg. 18) |
| Oxidation State (OS) |
x |
x |
| d-electron number (DN) |
n |
n |
| |
|
| Substitution |
| |
|
| EN |
p |
p |
| OS |
x |
x |
| DN |
n |
n |
| |
 |
| Oxidation and Reduction |
| |
 |
| EN |
p (eg. 19) |
p-1 (eg. 18) |
| OS |
x |
x |
| DN |
n |
n |
| |
 |
| Insertion and Elimination |
| |
 |
| EN |
p |
p |
| OS |
x |
x |
| DN |
n |
n |
| |
 |
| Oxidative Addition and Reductive Elimination |
| |
 |
| EN |
p (eg. 16) |
p+2 (eg. 18) |
| OS |
x |
x+2 |
| DN |
n |
n-2 |
| Square-planar d8,
16e goes to octahedral 18e. |
 |
|
|
