A coordination complex is the product of a Lewis acid-base reaction in which neutral molecules or anions (called ligands) bond to a central metal atom (or ion) by coordinate covalent bonds.
Coordination compounds and complexes are distinct chemical species - their properties and behavior are different from the metal atom/ion and ligands from which they are composed.
The coordination sphere of a coordination compound or complex consists of the central metal atom/ion plus its attached ligands. The coordination sphere is usually enclosed in brackets when written in a formula.
The coordination number is the number of donor atoms bonded to the central metal atom/ion.
|Some Coordination Complexes|
|example||molecular formula||Lewis base/ligand||Lewis acid||donor atom||coordination number|