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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Through-Bond and Through-Space Interactions in [2,2]Cyclophanes

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Author(s):
Galembeck, Sergio E. [1] ; Orenha, Renato P. [2] ; Madeira, Rafael M. [1] ; Peixoto, Leticia B. [2] ; Parreira, Renato L. T. [2]
Total Authors: 5
Affiliation:
[1] Univ Sao Paulo, Dept Quim, Fac Filosofia Ciencias & Letras Ribeirao Preto, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP - Brazil
[2] Univ Franca UNIFRAN, Nucleo Pesquisas Ciencias Exatas & Tecnol, Av Dr Armando Salles Oliveira 201, BR-14404600 Franca, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of the Brazilian Chemical Society; v. 32, n. 7, p. 1447-1455, JUL 2021.
Web of Science Citations: 0
Abstract

The interpretation of the distortions of the electron distribution in {[}2,2]cyclophanes (22-CPs) is controversial. Some studies indicate that there is an accumulation of electron density (p) outside the cavity of 22-CPs. The nature of through-space (ts) interaction is still under debate. The relative importance of ts and through-bond (tb) is an open question. In an attempt to clarify these points, we have investigated five 22-CPs and their corresponding toluene dimers by molecular orbitals analysis, electron density difference analysis, some topological analysis of p (quantum theory of atoms in molecules (QTAIM), electron localization function (ELF) and noncovalent interactions (NCI)), and energy decomposition analysis with natural orbitals for chemical valence (EDA-NOCV). p is concentrated inside the inter-ring region. All the analyses indicated that ts is predominant. The ts is composed by attractive dispersion and Pauli repulsion, with a small covalent contribution. Except for 1 and 6, all the compounds present inter-ring bond paths. (AU)

FAPESP's process: 11/07623-8 - The use of quantum-mechanical methods to study the bonds and chemical interactions in self-organizing systems with applications in catalysis, medicinal chemistry, electrochromism, energy storage and conversion
Grantee:Renato Luis Tame Parreira
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 17/04856-8 - Intra and intermolecular interactions in cyclophanes
Grantee:Sergio Emanuel Galembeck
Support type: Regular Research Grants
FAPESP's process: 08/02677-0 - Computational Study of the interaction between HIV-1 reverse transcriptase non-nucleoside inhibitors with amino acids of the inhibitory site
Grantee:Sergio Emanuel Galembeck
Support type: Regular Research Grants
FAPESP's process: 17/24856-2 - The Mechanism of the Substitution Reaction of the Ligand Nitrosyl by Aqua in Ruthenium Coordination Compounds
Grantee:Renato Pereira Orenha
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 14/50265-3 - Distribution and metabolism of natural and synthetic xenobiotics: from the comprehension of reactional process to tissue imaging generation
Grantee:Norberto Peporine Lopes
Support type: BIOTA-FAPESP Program - Thematic Grants