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Guerra C, Ayarde‐Henríquez L, Chamorro E, Ensuncho A. Uncovering Triradicaloid Structures in S
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Benzene Photochemistry**. CHEMPHOTOCHEM 2023. [DOI: 10.1002/cptc.202200263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Cristian Guerra
- Universidad Andrés Bello Facultad de Ciencias Exactas Centro de Química Teórica & Computacional (CQT&C) and Departamento de Ciencias Químicas Avenida República 275 8370146 Santiago de Chile Chile
- Universidad de Córdoba Facultad de Ciencias Básicas Grupo de Química Computacional Carrera 6 No. 77–305 Montería Córdoba Colombia
| | - Leandro Ayarde‐Henríquez
- Universidad Andrés Bello Facultad de Ciencias Exactas Centro de Química Teórica & Computacional (CQT&C) and Departamento de Ciencias Químicas Avenida República 275 8370146 Santiago de Chile Chile
| | - Eduardo Chamorro
- Universidad Andrés Bello Facultad de Ciencias Exactas Centro de Química Teórica & Computacional (CQT&C) and Departamento de Ciencias Químicas Avenida República 275 8370146 Santiago de Chile Chile
| | - Adolfo Ensuncho
- Universidad de Córdoba Facultad de Ciencias Básicas Grupo de Química Computacional Carrera 6 No. 77–305 Montería Córdoba Colombia
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Guerra C, Ayarde-Henríquez L, Duque-Noreña M, Chamorro E. Photochemically Induced 1,3-Butadiene Ring-Closure from the Topological Analysis of the Electron Localization Function Viewpoint. Chemphyschem 2022; 23:e202200217. [PMID: 35689411 DOI: 10.1002/cphc.202200217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/01/2022] [Indexed: 11/10/2022]
Abstract
The electronic rearrangement featuring the photochemically-induced 1,3-cis-butadiene is discussed within a bonding evolution theory (BET) perspective based on the topological analysis of the electron localization function and Thom's catastrophe theory. The process involves the vertical singlet-singlet excitation S0 →S2 , and the subsequent deactivation implying the S2 /S1 and S1 /S0 conical intersection regions. BET results reveal that the new CC bond is finally formed on the S0 surface, as also recently found in the photochemical addition of two ethylenes [Phys. Chem. Chem. Phys. 23, 20598, (2021)].
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Affiliation(s)
- Cristian Guerra
- Universidad Andrés Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas. Avenida, República 275, 8370146, Santiago de Chile, Chile.,Universidad de Córdoba, Facultad de Ciencias Básicas, Departamento de Química, Grupo de Química Computacional (GQC)., Carrera 6 No, 77- 305, Montería - Córdoba, Colombia
| | - Leandro Ayarde-Henríquez
- Universidad Andrés Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas. Avenida, República 275, 8370146, Santiago de Chile, Chile
| | - Mario Duque-Noreña
- Universidad Andrés Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas. Avenida, República 275, 8370146, Santiago de Chile, Chile
| | - Eduardo Chamorro
- Universidad Andrés Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas. Avenida, República 275, 8370146, Santiago de Chile, Chile
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Guerra C, Ayarde-Henríquez L, Duque-Noreña M, Cárdenas C, Pérez P, Chamorro E. On the nature of bonding in the photochemical addition of two ethylenes: C-C bond formation in the excited state? Phys Chem Chem Phys 2021; 23:20598-20606. [PMID: 34505860 DOI: 10.1039/d1cp03554a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, the 2s + 2s (face-to-face) prototypical example of a photochemical reaction has been re-examined to characterize the evolution of chemical bonding. The analysis of the electron localization function (as an indirect measure of the Pauli principle) along the minimum energy path provides strong evidence supporting that CC bond formation occurs not in the excited state but in the ground electronic state after crossing the rhombohedral S1/S0 conical intersection.
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Affiliation(s)
- Cristian Guerra
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Avenida República 275, 8370146, Santiago, Chile.
| | - Leandro Ayarde-Henríquez
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Avenida República 275, 8370146, Santiago, Chile.
| | - Mario Duque-Noreña
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Avenida República 275, 8370146, Santiago, Chile.
| | - Carlos Cárdenas
- Universidad de Chile, Facultad de Ciencias, Departamento de Física, Avenida Las Palmeras 3425, Santiago, Chile. .,Centro para el Desarrollo de la Nanociencia y la Nanotecnología (CEDENNA), 9170124 Santiago, Chile
| | - Patricia Pérez
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Avenida República 275, 8370146, Santiago, Chile.
| | - Eduardo Chamorro
- Universidad Andres Bello, Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Avenida República 275, 8370146, Santiago, Chile.
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Ayarde-Henríquez L, Guerra C, Duque-Noreña M, Rincón E, Pérez P, Chamorro E. Are There Only Fold Catastrophes in the Diels-Alder Reaction Between Ethylene and 1,3-Butadiene? J Phys Chem A 2021; 125:5152-5165. [PMID: 33977708 DOI: 10.1021/acs.jpca.1c01448] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This work revisits the topological characterization of the Diels-Alder reaction between 1,3-butadiene and ethylene. In contrast to the currently accepted rationalization, we here provide strong evidence in support of a representation in terms of seven structural stability domains separated by a sequence of 10 elementary catastrophes, but all are only of the fold type (F and F†), that is, C4H6 + C2H4:1-7-[FF]F[F†F†][F†F†][FF]F†-0: C6H10. Such an unexpected finding provides fundamental new insights opening simplifying perspectives concerning the rationalization of the CC bond formation in pericyclic reactions in terms of the simplest Thom's elementary catastrophe, namely, the one-(state) variable, one-(control) parameter function.
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Affiliation(s)
- Leandro Ayarde-Henríquez
- Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andres Bello, Avenida República 275, 8370146 Santiago, Chile
| | - Cristian Guerra
- Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andres Bello, Avenida República 275, 8370146 Santiago, Chile
| | - Mario Duque-Noreña
- Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andres Bello, Avenida República 275, 8370146 Santiago, Chile
| | - Elizabeth Rincón
- Facultad de Ciencias, Instituto de Ciencias Químicas, Universidad Austral de Chile, Las encinas 220, 5110033 Valdivia, Chile
| | - Patricia Pérez
- Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andres Bello, Avenida República 275, 8370146 Santiago, Chile
| | - Eduardo Chamorro
- Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andres Bello, Avenida República 275, 8370146 Santiago, Chile
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Khojandi M, Seif A, Zahedi E, Domingo LR, Karimkhani M. Unravelling the kinetics and molecular mechanism of the degenerate Cope rearrangement of bullvalene. NEW J CHEM 2020. [DOI: 10.1039/c9nj05965b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The kinetics and molecular mechanism of the gas phase degenerate Cope rearrangement (DCR) of bullvalene have been investigated by applying quantum mechanical calculations.
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Affiliation(s)
- Mahya Khojandi
- Department of Chemistry
- Central Tehran Branch
- Islamic Azad University
- Tehran
- Iran
| | - Ahmad Seif
- Department of Chemistry
- Central Tehran Branch
- Islamic Azad University
- Tehran
- Iran
| | - Ehsan Zahedi
- Department of Chemistry
- Shahrood Branch
- Islamic Azad University
- Shahrood
- Iran
| | - Luis R. Domingo
- Department of Organic Chemistry
- University of Valencia
- 46100 Burjassot
- Spain
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Understanding the sequence of the electronic flow along the HCN/CNH isomerization within a bonding evolution theory quantum topological framework. Theor Chem Acc 2019. [DOI: 10.1007/s00214-019-2440-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Unraveling the sequence of the electronic flow along the water-assisted ring-opening reaction in mutagen MX. Theor Chem Acc 2018. [DOI: 10.1007/s00214-018-2384-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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On the electron flow sequence driving the hydrometallation of acetylene by lithium hydride. J Mol Model 2018; 24:305. [DOI: 10.1007/s00894-018-3841-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 09/20/2018] [Indexed: 10/28/2022]
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Revealing carbocations in highly asynchronous concerted reactions: The ene-type reaction between dithiocarboxylic acids and alkenes. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.07.056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Fu W, Dong L, Shi J, Tong B, Cai Z, Zhi J, Dong Y. Multicomponent spiropolymerization of diisocyanides, alkynes and carbon dioxide for constructing 1,6-dioxospiro[4,4]nonane-3,8-diene as structural units under one-pot catalyst-free conditions. Polym Chem 2018. [DOI: 10.1039/c8py01336e] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A novel multicomponent spiropolymerization was developed by using diisocyanide, alkyne and CO2, and 1,6-dioxospiro[4,4]nonane-3,8-diene was instantly formed.
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Affiliation(s)
- Weiqiang Fu
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications
- School of Materials Science and Engineering
- Beijing Institute of Technology
- Beijing 100081
- China
| | - Lichao Dong
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications
- School of Materials Science and Engineering
- Beijing Institute of Technology
- Beijing 100081
- China
| | - Jianbing Shi
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications
- School of Materials Science and Engineering
- Beijing Institute of Technology
- Beijing 100081
- China
| | - Bin Tong
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications
- School of Materials Science and Engineering
- Beijing Institute of Technology
- Beijing 100081
- China
| | - Zhengxu Cai
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications
- School of Materials Science and Engineering
- Beijing Institute of Technology
- Beijing 100081
- China
| | - Junge Zhi
- Key Laboratory of Cluster Science of Ministry of Education
- School of Chemistry and Chemical Engineering
- Beijing Institute of Technology
- Beijing 100081
- China
| | - Yuping Dong
- Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications
- School of Materials Science and Engineering
- Beijing Institute of Technology
- Beijing 100081
- China
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Zahedi E, Shaabani S, Shiroudi A. Following the Molecular Mechanism of Decarbonylation of Unsaturated Cyclic Ketones Using Bonding Evolution Theory Coupled with NCI Analysis. J Phys Chem A 2017; 121:8504-8517. [DOI: 10.1021/acs.jpca.7b08503] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Ehsan Zahedi
- Chemistry
Department, Shahrood Branch, Islamic Azad University, Shahrood, Iran
| | - Samaneh Shaabani
- Chemistry
Department, Shahrood Branch, Islamic Azad University, Shahrood, Iran
| | - Abolfazl Shiroudi
- Center
of Molecular and Materials Modelling, Hasselt University, Agoralaan,
Gebouw D, B-3590 Diepenbeek, Belgium
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Kinetics and photophysical behavior of the P,N -Re I complex [ P,N -{(C 6 H 5 ) 2 (C 5 H 4 N)P}Re(CO) 3 ( O -O 3 SCF 3 )]: A directly coordinated (and labile) triflate. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.08.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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BET & ELF Quantum Topological Analysis of Neutral 2-Aza-Cope Rearrangement of γ-Alkenyl Nitrones. Molecules 2017; 22:molecules22081371. [PMID: 28825616 PMCID: PMC6151987 DOI: 10.3390/molecules22081371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Revised: 08/15/2017] [Accepted: 08/18/2017] [Indexed: 12/01/2022] Open
Abstract
The 2-Aza-Cope rearrangement of γ-alkenyl nitrones is a rare example of the neutral thermal 2-aza-Cope process that usually takes place with cationic species. During the rearrangement, a redistribution of bonds and electronic density occurs in one kinetic step. However, the introduction of substituents with different steric requirements and electronic features might alter the activation energies and the synchronicity of the reaction. The electron localization function (ELF) analysis and its application to Bonding Evolution Theory (BET) analysis within the context of Molecular Electron Density Theory (MEDT) is an excellent tool to monitor the electron density along the reaction coordinate and thus investigate in detail bond breaking and formation and the corresponding energy barriers. By analyzing topological ELF calculations of seventeen 2-aza-Cope nitrone rearrangements with selected substituents, the main factors influencing the synchronicity of the process were investigated. This MEDT study results revealed that the rearrangement is a non-polar process mostly influenced by steric factors rather than by electronic ones, and confirms the pseudoradical character of the process rather than any pericyclic electron-reorganization.
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Zahedi E, Mozaffari M, Yousefi L, Shiroudi A, Deleuze MS. Kinetic and mechanistic study on the pyrolysis of 1,3-dihydroisothianaphthene-2,2-dioxide toward benzocyclobutene using RRKM and BET theories. Chem Phys 2017. [DOI: 10.1016/j.chemphys.2016.11.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Electrophilic activation of CO2 in cycloaddition reactions towards a nucleophilic carbenoid intermediate: new defying insights from the Molecular Electron Density Theory. Theor Chem Acc 2016. [DOI: 10.1007/s00214-016-2022-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Domingo LR. Molecular Electron Density Theory: A Modern View of Reactivity in Organic Chemistry. Molecules 2016; 21:molecules21101319. [PMID: 27706053 PMCID: PMC6273663 DOI: 10.3390/molecules21101319] [Citation(s) in RCA: 258] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 09/27/2016] [Accepted: 09/28/2016] [Indexed: 11/16/2022] Open
Abstract
A new theory for the study of the reactivity in Organic Chemistry, named Molecular Electron Density Theory (MEDT), is proposed herein. MEDT is based on the idea that while the electron density distribution at the ground state is responsible for physical and chemical molecular properties, as proposed by the Density Functional Theory (DFT), the capability for changes in electron density is responsible for molecular reactivity. Within MEDT, the reactivity in Organic Chemistry is studied through a rigorous quantum chemical analysis of the changes of the electron density as well as the energies associated with these changes along the reaction path in order to understand experimental outcomes. Studies performed using MEDT allow establishing a modern rationalisation and to gain insight into molecular mechanisms and reactivity in Organic Chemistry.
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Affiliation(s)
- Luis R Domingo
- Department of Organic Chemistry, University of Valencia, Dr. Moliner 50, Burjassot, Valencia E-46100, Spain.
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Domingo LR, Emamian S, Salami M, Ríos-Gutiérrez M. Understanding the molecular mechanism of the [3 + 2] cycloaddition reaction of benzonitrile oxide toward electron-richN-vinylpyrrole: a DFT study. J PHYS ORG CHEM 2016. [DOI: 10.1002/poc.3544] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Luis R. Domingo
- Department of Organic Chemistry; University of Valencia; Dr. Moliner 50 E-46100 Burjassot Valencia Spain
| | - Saeedreza Emamian
- Faculty of Basic Science, Shahrood Branch; Islamic Azad University; Shahrood Iran
| | - Majid Salami
- Faculty of Basic Science, Shahrood Branch; Islamic Azad University; Shahrood Iran
| | - Mar Ríos-Gutiérrez
- Department of Organic Chemistry; University of Valencia; Dr. Moliner 50 E-46100 Burjassot Valencia Spain
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