1
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Rojas-González FE, Castillo-Quevedo C, Rodríguez-Kessler PL, Jimenez-Halla JOC, Vásquez-Espinal A, Eithiraj RD, Cortez-Valadez M, Cabellos JL. Exploration of Free Energy Surface of the Au 10 Nanocluster at Finite Temperature. Molecules 2024; 29:3374. [PMID: 39064952 PMCID: PMC11279810 DOI: 10.3390/molecules29143374] [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: 05/26/2024] [Revised: 07/08/2024] [Accepted: 07/15/2024] [Indexed: 07/28/2024] Open
Abstract
The first step in comprehending the properties of Au10 clusters is understanding the lowest energy structure at low and high temperatures. Functional materials operate at finite temperatures; however, energy computations employing density functional theory (DFT) methodology are typically carried out at zero temperature, leaving many properties unexplored. This study explored the potential and free energy surface of the neutral Au10 nanocluster at a finite temperature, employing a genetic algorithm coupled with DFT and nanothermodynamics. Furthermore, we computed the thermal population and infrared Boltzmann spectrum at a finite temperature and compared it with the validated experimental data. Moreover, we performed the chemical bonding analysis using the quantum theory of atoms in molecules (QTAIM) approach and the adaptive natural density partitioning method (AdNDP) to shed light on the bonding of Au atoms in the low-energy structures. In the calculations, we take into consideration the relativistic effects through the zero-order regular approximation (ZORA), the dispersion through Grimme's dispersion with Becke-Johnson damping (D3BJ), and we employed nanothermodynamics to consider temperature contributions. Small Au clusters prefer the planar shape, and the transition from 2D to 3D could take place at atomic clusters consisting of ten atoms, which could be affected by temperature, relativistic effects, and dispersion. We analyzed the energetic ordering of structures calculated using DFT with ZORA and single-point energy calculation employing the DLPNO-CCSD(T) methodology. Our findings indicate that the planar lowest energy structure computed with DFT is not the lowest energy structure computed at the DLPN0-CCSD(T) level of theory. The computed thermal population indicates that the 2D elongated hexagon configuration strongly dominates at a temperature range of 50-800 K. Based on the thermal population, at a temperature of 100 K, the computed IR Boltzmann spectrum agrees with the experimental IR spectrum. The chemical bonding analysis on the lowest energy structure indicates that the cluster bond is due only to the electrons of the 6 s orbital, and the Au d orbitals do not participate in the bonding of this system.
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Affiliation(s)
| | - César Castillo-Quevedo
- Departamento de Fundamentos del Conocimiento, Centro Universitario del Norte, Universidad de Guadalajara, Carretera Federal No. 23, km. 191, Colotlán 46200, Jalisco, Mexico;
| | | | - José Oscar Carlos Jimenez-Halla
- Departamento de Química, División de Ciencias Exactas y Naturales, Universidad de Guanajuato, Noria Alta s/n, Guanajuato 36050, Guanajuato, Mexico;
| | - Alejandro Vásquez-Espinal
- Química y Farmacia, Facultad de Ciencias de la Salud, Universidad Arturo Prat. Casilla 121, Iquique 1100000, Chile;
| | | | - Manuel Cortez-Valadez
- CONAHCYT-Departamento de Investigación en Física, Universidad de Sonora, Apdo. Postal 5-88, Hermosillo 83190, Sonora, Mexico;
| | - José Luis Cabellos
- Coordinación de Investigación y Desarrollo Tecnológico, Universidad Politécnica de Tapachula, Carretera Tapachula a Puerto Madero km. 24, Tapachula 30830, Chiapas, Mexico
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2
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Dong X, Chen C, Cui ZH. Tuning structural preference of negatively charged B16 by ionically or covalently interacting with alkali and coinage metals. Chem Phys 2021. [DOI: 10.1016/j.chemphys.2021.111315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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3
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Buelna-García CE, Robles-Chaparro E, Parra-Arellano T, Quiroz-Castillo JM, del-Castillo-Castro T, Martínez-Guajardo G, Castillo-Quevedo C, de-León-Flores A, Anzueto-Sánchez G, Martin-del-Campo-Solis MF, Mendoza-Wilson AM, Vásquez-Espinal A, Cabellos JL. Theoretical Prediction of Structures, Vibrational Circular Dichroism, and Infrared Spectra of Chiral Be 4B 8 Cluster at Different Temperatures. Molecules 2021; 26:3953. [PMID: 34203563 PMCID: PMC8271876 DOI: 10.3390/molecules26133953] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/18/2021] [Accepted: 06/22/2021] [Indexed: 11/16/2022] Open
Abstract
Lowest-energy structures, the distribution of isomers, and their molecular properties depend significantly on geometry and temperature. Total energy computations using DFT methodology are typically carried out at a temperature of zero K; thereby, entropic contributions to the total energy are neglected, even though functional materials work at finite temperatures. In the present study, the probability of the occurrence of one particular Be4B8 isomer at temperature T is estimated by employing Gibbs free energy computed within the framework of quantum statistical mechanics and nanothermodynamics. To identify a list of all possible low-energy chiral and achiral structures, an exhaustive and efficient exploration of the potential/free energy surfaces is carried out using a multi-level multistep global genetic algorithm search coupled with DFT. In addition, we discuss the energetic ordering of structures computed at the DFT level against single-point energy calculations at the CCSD(T) level of theory. The total VCD/IR spectra as a function of temperature are computed using each isomer's probability of occurrence in a Boltzmann-weighted superposition of each isomer's spectrum. Additionally, we present chemical bonding analysis using the adaptive natural density partitioning method in the chiral putative global minimum. The transition state structures and the enantiomer-enantiomer and enantiomer-achiral activation energies as a function of temperature evidence that a change from an endergonic to an exergonic type of reaction occurs at a temperature of 739 K.
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Affiliation(s)
- Carlos Emiliano Buelna-García
- Departamento de Investigación en Polímeros y Materiales, Edificio 3G, Universidad de Sonora, Hermosillo 83000, Sonora, Mexico; (C.E.B.-G.); (J.M.Q.-C.); (T.d.-C.-C.)
- Organización Científica y Tecnológica del Desierto, Hermosillo 83150, Sonora, Mexico
| | - Eduardo Robles-Chaparro
- Departamento de Ciencias Químico Biologicas, Edificio 5A, Universidad de Sonora, Hermosillo 83000, Sonora, Mexico; (E.R.-C.); (T.P.-A.); (A.d.-L.-F.)
| | - Tristan Parra-Arellano
- Departamento de Ciencias Químico Biologicas, Edificio 5A, Universidad de Sonora, Hermosillo 83000, Sonora, Mexico; (E.R.-C.); (T.P.-A.); (A.d.-L.-F.)
| | - Jesus Manuel Quiroz-Castillo
- Departamento de Investigación en Polímeros y Materiales, Edificio 3G, Universidad de Sonora, Hermosillo 83000, Sonora, Mexico; (C.E.B.-G.); (J.M.Q.-C.); (T.d.-C.-C.)
| | - Teresa del-Castillo-Castro
- Departamento de Investigación en Polímeros y Materiales, Edificio 3G, Universidad de Sonora, Hermosillo 83000, Sonora, Mexico; (C.E.B.-G.); (J.M.Q.-C.); (T.d.-C.-C.)
| | - Gerardo Martínez-Guajardo
- Unidad Académica de Ciencias Químicas, Área de Ciencias de la Salud, Universidad Autónomade Zacatecas, Km. 6 Carretera Zacatecas-Guadalajara s/n, Ejido La Escondida C.P., Zacatecas 98160, Zac, Mexico;
| | - Cesar Castillo-Quevedo
- Departamento de Fundamentos del Conocimiento, Centro Universitario del Norte, Universidad de Guadalajara, Carretera Federal No. 23, Km. 191, C.P., Colotlán 46200, Jalisco, Mexico; (C.C.-Q.); (M.F.M.-d.-C.-S.)
| | - Aned de-León-Flores
- Departamento de Ciencias Químico Biologicas, Edificio 5A, Universidad de Sonora, Hermosillo 83000, Sonora, Mexico; (E.R.-C.); (T.P.-A.); (A.d.-L.-F.)
| | | | - Martha Fabiola Martin-del-Campo-Solis
- Departamento de Fundamentos del Conocimiento, Centro Universitario del Norte, Universidad de Guadalajara, Carretera Federal No. 23, Km. 191, C.P., Colotlán 46200, Jalisco, Mexico; (C.C.-Q.); (M.F.M.-d.-C.-S.)
| | - Ana Maria Mendoza-Wilson
- Coordinación de Tecnología de Alimentos de Origen Vegetal, CIAD, A.C., Carretera Gustavo Enrique Astiazarán Rosas, No. 46, Hermosillo 83304, Sonora, Mexico;
| | - Alejandro Vásquez-Espinal
- Computational and Theoretical Chemistry Group Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Republica 498, Santiago 8370035, Chile;
| | - Jose Luis Cabellos
- Departamento de Investigación en Física, Edificio 3M, Universidad de Sonora, Hermosillo 83000, Sonora, Mexico
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4
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How do the Hückel and Baird Rules Fade away in Annulenes? Molecules 2020; 25:molecules25030711. [PMID: 32045990 PMCID: PMC7037833 DOI: 10.3390/molecules25030711] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/27/2020] [Accepted: 01/29/2020] [Indexed: 01/27/2023] Open
Abstract
Two of the most popular rules to characterize the aromaticity of molecules are those due to Hückel and Baird, which govern the aromaticity of singlet and triplet states. In this work, we study how these rules fade away as the ring structure increases and an optimal overlap between p orbitals is no longer possible due to geometrical restrictions. To this end, we study the lowest-lying singlet and triplet states of neutral annulenes with an even number of carbon atoms between four and eighteen. First of all, we analyze these rules from the Hückel molecular orbital method and, afterwards, we perform a geometry optimization of the annulenes with several density functional approximations in order to analyze the effect that the distortions from planarity produce on the aromaticity of annulenes. Finally, we analyze the performance of three density functional approximations that employ different percentages of Hartree-Fock exchange (B3LYP, CAM-B3LYP and M06-2X) and Hartree-Fock. Our results reveal that functionals with a low percentage of Hartree-Fock exchange at long ranges suffer from severe delocalization errors that result in wrong geometrical structures and the overestimation of the aromatic character of annulenes.
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Dong X, Jalife S, Vásquez-Espinal A, Barroso J, Orozco-Ic M, Ravell E, Cabellos JL, Liang WY, Cui ZH, Merino G. Li 2B 24: the simplest combination for a three-ring boron tube. NANOSCALE 2019; 11:2143-2147. [PMID: 30667008 DOI: 10.1039/c8nr09173k] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Herein we introduce a strategy employing lithium atoms as a scaffold to stabilize an embryo for boron tubes. The systematical exploration of the potential energy surface via evolutionary algorithms allowed us to find that Li2B24 adopts a tubular structure formed by three stacked rings of eight borons each with two lithium atoms capping the tube. The lithium atoms are essential for stabilization because of the strong electrostatic interaction between the Li cations and the boron framework, and concomitantly, they compensate for the energy cost of distorting a quasi-planar or double ring B24 cluster.
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Affiliation(s)
- Xue Dong
- Institute of Atomic and Molecular Physics, Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun, China.
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6
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Vlahovic F, Gruden M, Swart M. Rotating Iron and Titanium Sandwich Complexes. Chemistry 2018; 24:5070-5073. [PMID: 29144564 DOI: 10.1002/chem.201704829] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Indexed: 11/11/2022]
Abstract
The origin for the rotational barrier of organometallic versus inorganic sandwich complexes has remained enigmatic for the past decades. Here, we investigate in detail what causes the substantial barrier for titanodecaphosphacene through spin-state consistent density functional theory. Orbital interactions are shown to be the determining factor.
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Affiliation(s)
- Filip Vlahovic
- Innovation center of the Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Maja Gruden
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Marcel Swart
- Institut de Química Computacional i Catàlisi, University of Girona, Campus Montilivi (Ciències), 17003, Girona, Spain.,ICREA, Pg. Lluís Companys 23, 08010, Barcelona, Spain
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7
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Dong X, Jalife S, Vásquez-Espinal A, Ravell E, Pan S, Cabellos JL, Liang WY, Cui ZH, Merino G. Li 2 B 12 and Li 3 B 12 : Prediction of the Smallest Tubular and Cage-like Boron Structures. Angew Chem Int Ed Engl 2018; 57:4627-4631. [PMID: 29473272 DOI: 10.1002/anie.201800976] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Indexed: 11/08/2022]
Abstract
An intriguing structural transition from the quasi-planar form of B12 cluster upon the interaction with lithium atoms is reported. High-level computations show that the lowest energy structures of LiB12 , Li2 B12 , and Li3 B12 have quasi-planar (Cs ), tubular (D6d ), and cage-like (Cs ) geometries, respectively. The energetic cost of distorting the B12 quasi-planar fragment is overcompensated by an enhanced electrostatic interaction between the Li cations and the tubular or cage-like B12 fragments, which is the main reason of such drastic structural changes, resulting in the smallest tubular (Li2 B12 ) and cage-like (Li3 B12 ) boron structures reported to date.
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Affiliation(s)
- Xue Dong
- Institute of Atomic and Molecular Physics, Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun, China
| | - Said Jalife
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex, 97310, Mérida, Yuc., México
| | - Alejandro Vásquez-Espinal
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex, 97310, Mérida, Yuc., México
| | - Estefanía Ravell
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex, 97310, Mérida, Yuc., México
| | - Sudip Pan
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex, 97310, Mérida, Yuc., México
| | - José Luis Cabellos
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex, 97310, Mérida, Yuc., México.,Departamento de Investigación en Polímeros y Materiales, Universidad de Sonora, Edif. 3G, Blvd Luis Encinas y Rosales S/N, Colonia Centro, 83000, Hermosillo, Son., México
| | - Wei-Yan Liang
- Institute of Atomic and Molecular Physics, Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun, China
| | - Zhong-Hua Cui
- Institute of Atomic and Molecular Physics, Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy, Jilin University, Changchun, China
| | - Gabriel Merino
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex, 97310, Mérida, Yuc., México
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Dong X, Jalife S, Vásquez‐Espinal A, Ravell E, Pan S, Cabellos JL, Liang W, Cui Z, Merino G. Li
2
B
12
and Li
3
B
12
: Prediction of the Smallest Tubular and Cage‐like Boron Structures. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800976] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xue Dong
- Institute of Atomic and Molecular Physics Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy Jilin University Changchun China
| | - Said Jalife
- Departamento de Física Aplicada Centro de Investigación y de Estudios Avanzados Unidad Mérida km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex 97310 Mérida Yuc. México
| | - Alejandro Vásquez‐Espinal
- Departamento de Física Aplicada Centro de Investigación y de Estudios Avanzados Unidad Mérida km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex 97310 Mérida Yuc. México
| | - Estefanía Ravell
- Departamento de Física Aplicada Centro de Investigación y de Estudios Avanzados Unidad Mérida km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex 97310 Mérida Yuc. México
| | - Sudip Pan
- Departamento de Física Aplicada Centro de Investigación y de Estudios Avanzados Unidad Mérida km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex 97310 Mérida Yuc. México
| | - José Luis Cabellos
- Departamento de Física Aplicada Centro de Investigación y de Estudios Avanzados Unidad Mérida km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex 97310 Mérida Yuc. México
- Departamento de Investigación en Polímeros y Materiales Universidad de Sonora Edif. 3G, Blvd Luis Encinas y Rosales S/N, Colonia Centro 83000 Hermosillo Son. México
| | - Wei‐yan Liang
- Institute of Atomic and Molecular Physics Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy Jilin University Changchun China
| | - Zhong‐hua Cui
- Institute of Atomic and Molecular Physics Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy Jilin University Changchun China
| | - Gabriel Merino
- Departamento de Física Aplicada Centro de Investigación y de Estudios Avanzados Unidad Mérida km 6 Antigua carretera a Progreso. Apdo. Postal 73, Cordemex 97310 Mérida Yuc. México
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9
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Mondal S, Cabellos JL, Pan S, Osorio E, Torres-Vega JJ, Tiznado W, Restrepo A, Merino G. 10-π-Electron arenes à la carte: structure and bonding of the [E-(CnHn)-E](n-6) (E = Ca, Sr, Ba; n = 6-8) complexes. Phys Chem Chem Phys 2017; 18:11909-18. [PMID: 26936126 DOI: 10.1039/c6cp00671j] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
In this paper, we provide solid evidence to show that among an overwhelming structural diversity, alkaline earth metals (Ca, Sr, Ba) have the ability to form inverted sandwich compounds with C6H6, C7H7(+), and C8H8(2+) of Dnh symmetry and general formula [E-(CnHn)-E](n-6) (n = 6-8) with planar 10-π-electron aromatic cores by virtue of transferring two electrons per metal atom to the ring. However, the origin of the orbital interaction between the metals and the carbon ring is quite different; while [E-(C6H6)-E] complexes are dominated by δ-interactions, both π- and δ-interactions are important in [E-(C7H7)-E](+) and [E-(C8H8)-E](2+) complexes.
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Affiliation(s)
- Sukanta Mondal
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, Km 6 Antigua Carretera a Progreso, Apdo. Postal 73, Cordemex, 97310, Mérida, Yuc., Mexico.
| | - Jose Luis Cabellos
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, Km 6 Antigua Carretera a Progreso, Apdo. Postal 73, Cordemex, 97310, Mérida, Yuc., Mexico.
| | - Sudip Pan
- Department of Chemistry and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur, 721302, India
| | - Edison Osorio
- Departamento de Ciencias Básicas, Fundación Universitaria Luis Amigó, SISCO, Transversal 51A #67B 90, Medellín, Colombia
| | - Juan Jose Torres-Vega
- Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, P.O. Box: 14-0149, Lima, Peru
| | - William Tiznado
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas Universidad Andres Bello, República 275, Santiago, Chile
| | - Albeiro Restrepo
- Instituto de Química, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Gabriel Merino
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados, Unidad Mérida, Km 6 Antigua Carretera a Progreso, Apdo. Postal 73, Cordemex, 97310, Mérida, Yuc., Mexico.
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10
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Barroso J, Mondal S, Cabellos JL, Osorio E, Pan S, Merino G. Structure and Bonding of Alkali-Metal Pentalenides. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00768] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jorge Barroso
- Departamento de
Física Aplicada, Centro de Investigación y de Estudios, Avanzados Unidad Mérida, km 6 Antigua carretera a Progreso, Apdo. Postal 73, Cordemex, 97310 Mérida, Yucatán, México
| | - Sukanta Mondal
- Departamento de
Física Aplicada, Centro de Investigación y de Estudios, Avanzados Unidad Mérida, km 6 Antigua carretera a Progreso, Apdo. Postal 73, Cordemex, 97310 Mérida, Yucatán, México
| | - José Luis Cabellos
- Departamento de
Física Aplicada, Centro de Investigación y de Estudios, Avanzados Unidad Mérida, km 6 Antigua carretera a Progreso, Apdo. Postal 73, Cordemex, 97310 Mérida, Yucatán, México
| | - Edison Osorio
- Departamento de Ciencias Básicas, Universidad Católica Luis Amigó, SISCO, Transversal 51A #67B 90, Medellín, Colombia
| | - Sudip Pan
- Departamento de
Física Aplicada, Centro de Investigación y de Estudios, Avanzados Unidad Mérida, km 6 Antigua carretera a Progreso, Apdo. Postal 73, Cordemex, 97310 Mérida, Yucatán, México
| | - Gabriel Merino
- Departamento de
Física Aplicada, Centro de Investigación y de Estudios, Avanzados Unidad Mérida, km 6 Antigua carretera a Progreso, Apdo. Postal 73, Cordemex, 97310 Mérida, Yucatán, México
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11
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Why CpAl–Cr(CO)5 is linear while CpIn–Cr(CO)5 is not? Understanding the structure and bonding of the CpE–Cr(CO)5 (E = Group 13 element) complexes. Theor Chem Acc 2016. [DOI: 10.1007/s00214-016-1993-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Saha R, Pan S, Mandal S, Orozco M, Merino G, Chattaraj PK. Noble gas supported B3+ cluster: formation of strong covalent noble gas–boron bonds. RSC Adv 2016. [DOI: 10.1039/c6ra16188j] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ar to Rn atoms formed exceptionally strong bonds with B3+, where the Ng (HOMO) → B3Ng2+ (LUMO) σ-donation is the key term to stabilize the complexes.
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Affiliation(s)
- Ranajit Saha
- Department of Chemistry and Centre for Theoretical Studies
- Indian Institute of Technology Kharagpur
- Kharagpur
- India
| | - Sudip Pan
- Department of Chemistry and Centre for Theoretical Studies
- Indian Institute of Technology Kharagpur
- Kharagpur
- India
| | - Subhajit Mandal
- Department of Chemistry and Centre for Theoretical Studies
- Indian Institute of Technology Kharagpur
- Kharagpur
- India
| | - Mesías Orozco
- Departamento de Física Aplicada
- Centro de Investigación y de Estudios Avanzados Unidad Mérida
- Mérida
- Mexico
| | - Gabriel Merino
- Departamento de Física Aplicada
- Centro de Investigación y de Estudios Avanzados Unidad Mérida
- Mérida
- Mexico
| | - Pratim K. Chattaraj
- Department of Chemistry and Centre for Theoretical Studies
- Indian Institute of Technology Kharagpur
- Kharagpur
- India
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Abstract
We introduce a new electronic aromaticity index, AV1245, consisting of an average of the 4-center indices along the ring that keep a positional relationship of 1, 2, 4, 5.
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Affiliation(s)
- Eduard Matito
- Faculty of Chemistry
- University of the Basque Country UPV/EHU
- and Donostia International Physics Center (DIPC)
- 20080 Donostia
- Spain
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14
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Wolters LP, Bickelhaupt FM. The activation strain model and molecular orbital theory. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2015; 5:324-343. [PMID: 26753009 PMCID: PMC4696410 DOI: 10.1002/wcms.1221] [Citation(s) in RCA: 239] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 04/05/2015] [Accepted: 04/07/2015] [Indexed: 12/23/2022]
Abstract
The activation strain model is a powerful tool for understanding reactivity, or inertness, of molecular species. This is done by relating the relative energy of a molecular complex along the reaction energy profile to the structural rigidity of the reactants and the strength of their mutual interactions: ΔE(ζ) = ΔEstrain(ζ) + ΔEint(ζ). We provide a detailed discussion of the model, and elaborate on its strong connection with molecular orbital theory. Using these approaches, a causal relationship is revealed between the properties of the reactants and their reactivity, e.g., reaction barriers and plausible reaction mechanisms. This methodology may reveal intriguing parallels between completely different types of chemical transformations. Thus, the activation strain model constitutes a unifying framework that furthers the development of cross-disciplinary concepts throughout various fields of chemistry. We illustrate the activation strain model in action with selected examples from literature. These examples demonstrate how the methodology is applied to different research questions, how results are interpreted, and how insights into one chemical phenomenon can lead to an improved understanding of another, seemingly completely different chemical process. WIREs Comput Mol Sci 2015, 5:324-343. doi: 10.1002/wcms.1221.
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Affiliation(s)
- Lando P Wolters
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling (ACMM), VU University AmsterdamAmsterdam, The Netherlands; Dipartimento di Scienze Chimiche, Università degli Studi di PadovaPadova, Italy
| | - F Matthias Bickelhaupt
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling (ACMM), VU University AmsterdamAmsterdam, The Netherlands; Institute of Molecules and Materials (IMM), Radboud University NijmegenNijmegen, The Netherlands
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Grande-Aztatzi R, Martínez-Alanis PR, Cabellos JL, Osorio E, Martínez A, Merino G. Structural evolution of small gold clusters doped by one and two boron atoms. J Comput Chem 2014; 35:2288-96. [PMID: 25284009 DOI: 10.1002/jcc.23748] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 09/09/2014] [Accepted: 09/11/2014] [Indexed: 01/26/2023]
Abstract
The potential energy surfaces (PES) of a series of gold-boron clusters with formula Aun B (n = 1-8) and Aum B2 (m = 1-7) have been explored using a modified stochastic search algorithm. Despite the complexity of the PES of these clusters, there are well-defined growth patterns. The bonding of these clusters is analyzed using the adaptive natural density partitioning and the natural bonding orbital analyses. Reactivity is studied in terms of the molecular electrostatic potential.
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Affiliation(s)
- Rafael Grande-Aztatzi
- Departamento de Física Aplicada, Centro de Investigación y de Estudios Avanzados Unidad Mérida, Km. 6 Antigua carretera a Progreso A.P. 73, Cordemex 97310, Mérida, Yucatán, México
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Ivanov AS, Popov IA, Boldyrev AI, Zhdankin VV. The IX (X=O,N,C) Double Bond in Hypervalent Iodine Compounds: Is it Real? Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405142] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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Ivanov AS, Popov IA, Boldyrev AI, Zhdankin VV. The IX (X=O,N,C) Double Bond in Hypervalent Iodine Compounds: Is it Real? Angew Chem Int Ed Engl 2014; 53:9617-21. [DOI: 10.1002/anie.201405142] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 06/13/2014] [Indexed: 01/20/2023]
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