期刊
MOLECULES
卷 26, 期 21, 页码 -出版社
MDPI
DOI: 10.3390/molecules26216409
关键词
electron density; chemical bonding; intermolecular interactions; charge displacement; curvilinear interaction paths
资金
- Scuola Normale Superiore through project DIVE: Development of Immersive approaches for the analysis of chemical bonding through Virtual-reality Environments [SNS18_B_RAMPINO]
- Scuola Normale Superiore through project LCFA-Local charge-flow analysis: a novel scheme for unravelling complex intermolecular interactions [SNS21_A_RAMPINO]
- Scuola Normale Superiore through the program Finanziamento a supporto della ricerca di base (SNS_RB_RAMPINO)
The article proposes a general, flexible reformulation of the Charge-Displacement (CD) analysis, capable of providing a quantitative view of charge displacement along custom curvilinear paths. The new scheme naturally reduces to ordinary CD analysis when the path is chosen to be a straight line.
The Charge-Displacement (CD) analysis has proven to be a powerful tool for a quantitative characterization of the electron-density flow occurring upon chemical bonding along a suitably chosen interaction axis. In several classes of interesting intermolecular interactions, however, an interaction axis cannot be straightforwardly defined, and the CD analysis loses consistency and usefulness. In this article, we propose a general, flexible reformulation of the CD analysis capable of providing a quantitative view of the charge displacement along custom curvilinear paths. The new scheme naturally reduces to ordinary CD analysis if the path is chosen to be a straight line. An implementation based on a discrete sampling of the electron densities and a Voronoi space partitioning is described and shown in action on two test cases of a metal-carbonyl and a pyridine-ammonia complex.
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