Covalent bond classification is a formalism used by chemists to classify diverse molecules in a way that helps to understand their reactivity patterns. Although in theory the covalent bond classification method can be applied to any molecule, in practice it has been widely adopted only by organometallic chemists.
Covalent bond classification was developed and first articulated by Malcolm Green in ?. The most comprehensive and up-to-date description was published by Gerard Parkin in ? In addition, many current inorganic textbooks incorporate elements of covalent bond classification in simplified form. (e.g., Crabtree)