Coordination compounds: What is Coordination Compound in Chemistry

What is Coordination Compound in Chemistry? A coordination compound refers to a molecule or ion in which a central metal atom is surrounded by a specific number of ions or molecules called ligands . These ligands are attached through coordinate (dative) covalent bonds. Coordination compounds are a special class of compounds in which the central metal atom is surrounded by ions or molecules beyond their normal valency. These are also referred to as complex compounds . These compounds are called Coordination compounds . Many biologically important compounds are coordination compounds in which complicated organic species are bound to metal ions. The common examples are : haemoglobin which is a coordination compound of iron, chlorophyll which is a coordination ... The coordination compounds formed by the transition elements are coloured due to the presence of unpaired electrons that absorb light in their electronic transitions. For example, the complexes containing Iron (II) can exhibit green and pale green colours, but the coordination compounds containing iron (III) have a brown or yellowish-brown colour. When the coordination centre is a metal, the corresponding coordination complexes have a magnetic nature due to the presence of unpaired electrons ... Complexes or coordination compounds are molecules that posess a metal center that is bound to ligands (atoms, ions, or molecules that donate electrons to the metal). These complexes can be neutral or charged. When the complex is charged, it is stabilized by neighboring counter-ions.