Coordination chemistry, also known as complex chemistry, is the study of chemical compounds that contain metal ions surrounded by ligands. This field of study focuses on the bonds between these metal ions and their ligands, as well as their physical and chemical properties. Some synonyms for coordination chemistry include complex chemistry, ligand chemistry, metal complex chemistry, and transition metal chemistry. This branch of chemistry has many applications in areas such as catalysis, materials science, and biochemistry. Understanding the principles of coordination chemistry is critical for developing new technologies and materials that are vital in modern industries.