A review on the information content of the pair density as a tool for the description of the electronic properties in molecular systems

Fernando J. Torres, Luis Rincón, Cesar Zambrano, José R. Mora, Miguel Méndez

Research output: Contribution to journalReview articlepeer-review

3 Scopus citations


Recent advances on the use of the information content of the pair density to understand bonding and reactivity of molecular systems are presented. Two quantities are described: (1) the information content of the like-spin exchange-correlation hole, χXC, and (2) the information content of the Coulomb hole, χC, of the like-spin and the unlike-spin cases. χXC is capable of describing the electron structure of molecules on the basis of chemical grounds with astonishing accuracy and provides a clear differentiation of the localization degree of electrons, belonging to different molecular basins. Furthermore, χXC is used as a tool to get insights in the electronic reorganization occurring along a reaction coordinate. In contrast to χXC, χC is observed to concentrate in regions between atomic shells, from which information of nonclassical weak interactions can be obtained. Some relevant problems, in which the application of χXC in conjunction with χC would be of great value, are presented.

Original languageEnglish (US)
Article numbere25763
JournalInternational Journal of Quantum Chemistry
Issue number2
StatePublished - Jan 15 2019
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this