An introduction to coordination compounds

Abstract

This chapter introduces key concepts in coordination chemistry, beginning with the structures and types of ligands that bind to a metal centre. It covers coordination numbers, ranging from low (e.g., two or three ligands) to higher numbers (up to 12), which influence the geometry of complexes. The importance of isomerism, including geometrical and optical isomers, is highlighted for their role in the diversity of coordination compounds. Stability is discussed through the chelate effect and ligand-field theories, explaining the electronic structure and bonding in transition metal complexes. The chapter also examines the thermodynamic and kinetic stability of complexes, and their applications in areas such as catalysis and medicine. Finally, models such as those of the crystal-field and ligand-field theories are introduced to explain magnetic and spectroscopic properties, providing a foundation for understanding coordination compounds in various contexts.