Determination of?-electron density and interatomic distances Communication 3. Confirmation of the hypothesis

1. Covalent bonds in molecules are formed byσ- andπ-electron charges, which are not in general equal to a whole number of electrons. 2. All bonds attached to atom donors ofπ-electrons haveπ-electron charges. 3. To the approximation, a linear relationship can be assumed betweenπ-electron charge and bond length. 4. A new and very promoting line of work is being developed in the theory of the electronic structure of molecules.