A coordination compound contains a central metal atom or ion surrounded by several oppositely charged ions or neutral molecules. These ions or molecules re-bonded to the metal atom or ion by a coordinate bond. They do not dissociate into simple ions when dissolved in water. The chemistry of coordination compounds is an important and challenging area of modern inorganic chemistry. Ligands are the molecules or ions that combine with the transition metal ions to produce these complexes. The coordination number of any Coordination compound is the total number of ligands associated with the transition metal ion. Coordination compounds include substances like haemoglobin, chlorophyll, vitamin B12, dyes, and catalysts used in the preparation of organic substances. The Coordination compounds are used as catalysts for several industrial and biological processes that have much importance in the quantitative and qualitative chemical analysis within the field of analytical chemistry. Coordination compounds is a challenging area in modern inorganic chemistry. Due to the advancement in this area, new concepts such as models of bonding, molecular structure, essential insights on the functioning of complex components of the biological system, etc. have been developed.