It decides both where electrophilic and nucleophilic attacks will preferentially occur, but also dictates the amount of Hirshfeld charge distribution, which correlates with experimental scales of electrophilicity and nucleophilicity. In order to have the information conservation, the system that was formed is adjusted in order to have each one of the components loaded according to the contribution of its "stock" of electronic density. Therefore, the Hirshfeld charge should be a good descriptor for both electrophilicity and nucleophilicity .