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- W2919074210 abstract "Understanding and control of intermolecular interactions play a crucial role in molecular recognition, crystal engineering, and biological systems. Three very frequent weak contacts linking the molecules in organic solids are halogen, chalcogen, and weak hydrogen bondings. In this thesis, we perform experimental and theoretical charge density rho(r) studies based on the QTAIM methodology for analyzing halogen and chalcogen bonding, and for comparing them with weak hydrogen bonding, as derived from the high-resolution single crystal X-ray diffraction multipole-refined electron density and from density functional theory (DFT) calculations. Defining the nature of these weak interactions as electrophilic-nucleophilic, we particularly focus on their strength and directionality. Based on the topology of L(r) = ¬rho inverted delta2 rho(r), a proposed electrostatic descriptor (delta(L/rho)) permitted us to evaluate quantitatively the electrostatic intensity between charge concentration (CC) and charge depletion (CD) regions belonging to the valence shell of the interacting atoms. The interaction energy (Eint) was described from the topological properties of rho(r). The attention has been also paid to the formation of recurrent structural fragments, called synthons. By the developed approach, it is proved that the synthon arrangement can be created not only by groups of atoms, but also by sets of CC and CD sites similarly involved in the contact formation" @default.
- W2919074210 created "2019-03-11" @default.
- W2919074210 creator A5043819675 @default.
- W2919074210 date "2013-03-06" @default.
- W2919074210 modified "2023-09-24" @default.
- W2919074210 title "Charge density analysis and topological properties of weak intermolecular interactions ? halogen and chalcogen bonding - and their comparison with hydrogen bonding" @default.
- W2919074210 hasPublicationYear "2013" @default.
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