Experimental Electron Densities and Chemical Bonding

Some recent results of charge density analysis by X‐ray and neutron diffraction are discussed. Problems that have been studied in a number of laboratories include the nature of single, double, and triple bonds, lone‐pair hybridization, bonding in some metals, alloys, and organometallic compounds, and the derivation of physical properties from X‐ray diffraction densities. At the present stage of development of methods studies of series of related compounds are feasible and expected to find widespread application.