Journal
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
Volume 112, Issue -, Pages -Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jmgm.2021.108121
Keywords
Ab initio calculations; Bond theory; Computational chemistry; Transition states; Quantum chemistry; Molecular evolution; Electronic structure; Electron transfer; Reaction mechanisms
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Funding
- Universidad de Buenos Aires [20020130100226BA]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas, Argentina [11220090100061]
- Secretaria General de Ciencia y Tecnica de la Universidad Nacional del Nordeste (Corrientes, Argentina) [17F012]
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This report deeply explores electron rearrangements in a chemical reaction case study. It focuses on the subtle description of electron distribution at both equilibrium and non-equilibrium conformations, particularly the determination of complex interaction patterns of two or four electrons in three centers. The results highlight the crucial importance of these interaction patterns in the charge transference process.
In this report we deeply explore the electron rearrangements for a chemical reaction case study of the SN2 type OH- + CH3-CN <-> HO-CH3 + CN-, within the topological formalism of QTAIM model in its local and the non-local or integrated form implementations. This is part of our main interest of a subtle description of the electron distribution at both, equilibrium and non-equilibrium conformations for the state function at correlated level of approximation. The emphasis is mainly placed on the determination of complex patterns of interaction of two or four electrons in three centers (2e-3c, 4e-3c). These results confirm them as a measure of electron excess or electron deficiency effects and revels their crucial importance in the charge transference process and its relationship with these complex patterns. All electronic magnitudes were followed along the configurations from reactants to products passing through the corresponding transition state TS. The results obtained throughout this case study reveals the high performance of the topological formalism of Bader type in the subtle description of electron rearrangements in a chemical transformation.
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