51
|
Szentpály LV. Universal Method to Calculate the Stability, Electronegativity, and Hardness of Dianions. J Phys Chem A 2010; 114:10891-6. [DOI: 10.1021/jp107177d] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- László von Szentpály
- Institut für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| |
Collapse
|
52
|
Tai TB, Nguyen MT. Thermochemical properties, electronic structure and bonding of mixed lithium boron clusters (BnLi, n=1–8) and their anions. Chem Phys 2010. [DOI: 10.1016/j.chemphys.2010.07.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
53
|
Van N, Tiritiris I, Winter RF, Sarkar B, Singh P, Duboc C, Muñoz-Castro A, Arratia-Pérez R, Kaim W, Schleid T. Oxidative Perhydroxylation of [closo-B12H12]2− to the Stable Inorganic Cluster Redox System [B12(OH)12]2−/.−: Experiment and Theory. Chemistry 2010; 16:11242-5. [DOI: 10.1002/chem.201001374] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
54
|
Chi XX, Lin XZ. Theoretical study on the aromaticity from d-AOs in cationic X(3)(+) (X = Sc, Y, La) clusters. J Mol Model 2010; 17:879-88. [PMID: 20593211 DOI: 10.1007/s00894-010-0782-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2009] [Accepted: 06/11/2010] [Indexed: 10/19/2022]
Abstract
The stable structures and aromatic characters for three cationic X(3)(+) (X = Sc, Y, and La) and three relevant neutral X(3)Cl (X = Sc, Y, La) clusters are investigated at the DFT and post HF level of theory. The calculated results show that the X(3)(+) cations each has two stable structures: the regular trigon (D(3h)) and the line (D∞h) with the regular trigon (D(3h)) being the ground state, while for three neutral X(3)Cl clusters, Sc(3)Cl has three stable isomers: the trigon-pyramidal (C(3v)), bidentate (C(2v)-1), and C(2v)-2 structures, Y(3)Cl and La(3)Cl each has only two stable isomers: the trigon-pyramidal (C(3v)) and bidentate (C(2v)-1) structures. The ground states for three X(3)Cl species are all the bidentate (C(2v)-1) isomers. The calculations of the resonance energy (RE) and NICS show that trigonal X(3)(+) isomers exhibit higher degree of aromaticity. The detailed molecular orbital analyzes reveal that the isolated trigonal Sc(3)(+) and Y(3)(+) cations each has one delocalized π-type MO and shows single π-aromaticity, while the isolated trigonal La(3)(+) cation has one delocalized σ-type MO and shows single σ-aromaticity. The single π- or σ-aromaticity for X(3)(+) are attributed to the contributions mainly from the d AOs of the corresponding transition metal X atoms. However, when a singly negatively charged counterion Cl(-) is added to Sc(3)(+), Y(3)(+), and La(3)(+) cations respectively, the aromatic type for the two Sc(3)(+), Y(3)(+) units in the corresponding neutral Sc(3)Cl, Y(3)Cl complexes are changed from π-aromaticity into σ-aromaticity, whereas the σ-aromaticity of the La(3)(+) units in the La(3)Cl complex keeps unchanged in this process. Thus three Sc(3)(+), Y(3)(+), La(3)(+) units in the corresponding X(3)Cl complexes all have only one σ-type MO and exhibit single σ-aromaticity.
Collapse
Affiliation(s)
- Xian Xing Chi
- College of Physics & Electronic Information Enginerring, WenZhou University, WenZhou 325035, Peoples Republic of China.
| | | |
Collapse
|
55
|
A Critical Assessment of the Performance of Magnetic and Electronic Indices of Aromaticity. Symmetry (Basel) 2010. [DOI: 10.3390/sym2021156] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
|
56
|
Tai TB, Nguyen MT, Dixon DA. Thermochemical properties and electronic structure of boron oxides BnOm (n = 5-10, m = 1-2) and their anions. J Phys Chem A 2010; 114:2893-912. [PMID: 20112902 DOI: 10.1021/jp909512m] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The molecular and electronic structures of a series of small boron monoxide and dioxide clusters B(n)O(m) (n = 5-10, m = 1, 2) plus their anions were predicted. The enthalpies of formation (DeltaH(f)'s), electron affinities (EAs), vertical detachment energies, and energies of different fragmentation processes are predicted using the G3B3 method. The G3B3 results were benchmarked with respect to more accurate CCSD(T)/CBS values for n = 1-4 with average deviations of +/-1.5 kcal/mol for DeltaH(f)'s and +/-0.03 eV for EAs. The results extend previous observations on the growth mechanism for boron oxide clusters: (i) The low spin electronic state is consistently favored. (ii) The most stable structure of a neutral boron monoxide B(n)O is obtained either by condensing O on a BB edge of a B(n) cycle, or by binding one BO group to a B(n-1) ring. The balance between both factors is dependent on the inherent stability of the boron cycles. (iii) A boron dioxide is formed by incorporating the second O atom into the corresponding monoxide to form BO bonds. (iv) A B(n)O(m)(-) anion is constructed with BO groups bound to the B(n-1) or B(n-2) rings (yielding the B(n-2)(BO)(2)(-) species). This becomes the preferred geometry for the larger boron dioxides, even in the neutral state. The boronyl group mainly behaves as an electron-withdrawing substituent reducing the binding energy and resonance energy of the oxides. (v) The boron oxides conserve some of the properties of the parent boron clusters such as the planarity and multiple aromaticity.
Collapse
Affiliation(s)
- Truong Ba Tai
- Department of Chemistry and LMCC-Mathematical Modeling and Computational Science Center, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
| | | | | |
Collapse
|
57
|
Muñoz-Castro A, Mac-Leod Carey D, Arratia-Pérez R. Spin-orbit effects on electronic delocalization. Aromaticity in a discrete square tetrapalladium sandwich complex. J Chem Phys 2010; 132:164308. [PMID: 20441276 DOI: 10.1063/1.3382340] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In this article, we report the relativistic electronic structure, including spin-orbit interaction, employing all-electron density functional theory calculations on the multimetallic sandwich compound [(CNT)Pd(4)(COT)](1+) (1), which can be considered as a [Pd(4)](2+) fragment flanked by two ring-ligands, namely, cyclononatetraenyl (CNT(1-)) and cyclooctatetraene (COT), as well as the dimer of 1, hereafter 2. The calculations suggest that the Pd(4)-ligand interaction is mainly electrostatic, being the main responsible term for the stabilization of the almost fully occupied 4d shell [Pd(4)](2+) fragment. The ring currents and electronic delocalization estimated via the nuclear independent chemical shifts indices and electron localization function, allow us to describe a significant sigma-aromaticity at the center of the Pd(4) square in 1, which in conjunction with the aromaticity arising from the ligands induce considerable aromatic character inside of the multimetallic metallocene.
Collapse
Affiliation(s)
- A Muñoz-Castro
- Departamento de Ciencias Quimicas, Relativistic Molecular Physics Group, Universidad Andres Bello, Republica 275, Santiago, Chile
| | | | | |
Collapse
|
58
|
Alexandrou EI, Gross A, Bacalis NC. Theoretical investigation of the interaction of CH4 with Al2 and Al3 neutral and charged clusters. J Chem Phys 2010; 132:154701. [PMID: 20423192 DOI: 10.1063/1.3376174] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Affiliation(s)
- E I Alexandrou
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Athens 11635, Greece
| | | | | |
Collapse
|
59
|
Chauhan RS, Kedarnath G, Wadawale A, Muñoz-Castro A, Arratia-Perez R, Jain VK, Kaim W. Tellurium(0) as a Ligand: Synthesis and Characterization of 2-Pyridyltellurolates of Platinum(II) and Structures of [Pt{2-Te-3-(R)C5H3N}2Te(PR′3)] (R = H or Me). Inorg Chem 2010; 49:4179-85. [PMID: 20369824 DOI: 10.1021/ic902347s] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - G. Kedarnath
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Amey Wadawale
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Alvaro Muñoz-Castro
- Departamento de Ciencias Quimicas, Universidad Andres Bello, Republica 275, Santiago, Chile
| | - Ramiro Arratia-Perez
- Departamento de Ciencias Quimicas, Universidad Andres Bello, Republica 275, Santiago, Chile
| | - Vimal K. Jain
- Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Wolfgang Kaim
- Institut fuer Anorganische Chemie, Universitaet Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| |
Collapse
|
60
|
Islas R, Martínez-Guajardo G, Jiménez-Halla JOC, Solà M, Merino G. Not All That Has a Negative NICS Is Aromatic: The Case of the H-Bonded Cyclic Trimer of HF. J Chem Theory Comput 2010. [DOI: 10.1021/ct100098c] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rafael Islas
- Departamento de Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Col. Noria Alta s/n C.P. 36050, Guanajuato, Gto., México, and Institut de Química Computacional and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
| | - Gerardo Martínez-Guajardo
- Departamento de Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Col. Noria Alta s/n C.P. 36050, Guanajuato, Gto., México, and Institut de Química Computacional and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
| | - J. Oscar C. Jiménez-Halla
- Departamento de Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Col. Noria Alta s/n C.P. 36050, Guanajuato, Gto., México, and Institut de Química Computacional and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
| | - Miquel Solà
- Departamento de Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Col. Noria Alta s/n C.P. 36050, Guanajuato, Gto., México, and Institut de Química Computacional and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
| | - Gabriel Merino
- Departamento de Química, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Col. Noria Alta s/n C.P. 36050, Guanajuato, Gto., México, and Institut de Química Computacional and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
| |
Collapse
|
61
|
Muñoz-Castro A, Arratia-Pérez R. Electronic Delocalization, Energetics, and Optical Properties of Tripalladium Ditropylium Halides, [Pd3(C7H7)2X3]1− (X = Cl−, Br−, and I−). J Phys Chem A 2010; 114:5217-21. [DOI: 10.1021/jp101038u] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Muñoz-Castro
- Departamento de Ciencias Quimicas, Relativistic Molecular Physics (ReMoPh) group, Universidad Andres Bello, Republica 275, Santiago, Chile
| | - R. Arratia-Pérez
- Departamento de Ciencias Quimicas, Relativistic Molecular Physics (ReMoPh) group, Universidad Andres Bello, Republica 275, Santiago, Chile
| |
Collapse
|
62
|
Feixas F, Jiménez-Halla JOC, Matito E, Poater J, Solà M. A Test to Evaluate the Performance of Aromaticity Descriptors in All-Metal and Semimetal Clusters. An Appraisal of Electronic and Magnetic Indicators of Aromaticity. J Chem Theory Comput 2010. [DOI: 10.1021/ct100034p] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ferran Feixas
- Institut de Química Computacional and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain and Institute of Physics, University of Szczecin, 70-451 Szczecin, Poland
| | - J. Oscar C. Jiménez-Halla
- Institut de Química Computacional and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain and Institute of Physics, University of Szczecin, 70-451 Szczecin, Poland
| | - Eduard Matito
- Institut de Química Computacional and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain and Institute of Physics, University of Szczecin, 70-451 Szczecin, Poland
| | - Jordi Poater
- Institut de Química Computacional and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain and Institute of Physics, University of Szczecin, 70-451 Szczecin, Poland
| | - Miquel Solà
- Institut de Química Computacional and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain and Institute of Physics, University of Szczecin, 70-451 Szczecin, Poland
| |
Collapse
|
63
|
Diagnosis of the σ-, π- and (σ+π)-Aromaticity by the Shape of the NICSzz-Scan Curves and Symmetry-Based Selection Rules. Symmetry (Basel) 2010. [DOI: 10.3390/sym2010284] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
|
64
|
|
65
|
Tsipis CA. Aromaticity/Antiaromaticity in “Bare” and “Ligand-Stabilized” Rings of Metal Atoms. STRUCTURE AND BONDING 2010. [DOI: 10.1007/978-3-642-05243-9_7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
66
|
Inagaki S. Orbitals in inorganic chemistry: metal rings and clusters, hydronitrogens, and heterocyles. Top Curr Chem (Cham) 2010; 289:293-315. [PMID: 21279578 DOI: 10.1007/128_2008_41] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A chemical orbital theory is useful in inorganic chemistry. Some applications are described for understanding and designing of inorganic molecules. Among the topics included are: (1) valence electron rules to predict stabilities of three- and four-membered ring metals and for those of regular octahedral M(6) metal clusters solely by counting the number of valence electrons; (2) pentagon stability (stability of five- relative to six-membered rings in some classes of molecules), predicted and applied for understanding and designing saturated molecules of group XV elements; (3) properties of unsaturated hydronitrogens N( m )H( n ) in contrast to those of hydrocarbons C( m )H( n ); (4) unusually short nonbonded distances between metal atoms in cyclic molecules.
Collapse
Affiliation(s)
- Satoshi Inagaki
- Department of Chemistry, Faculty of Engineering, Gifu University, Yanagido, Gifu, 501-1193, Japan,
| |
Collapse
|
67
|
Noorizadeh S, Shakerzadeh E. Shannon entropy as a new measure of aromaticity, Shannon aromaticity. Phys Chem Chem Phys 2010; 12:4742-9. [DOI: 10.1039/b916509f] [Citation(s) in RCA: 125] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
68
|
Zubarev DY, Boldyrev AI. Multiple Aromaticity, Multiple Antiaromaticity, and Conflicting Aromaticity in Planar Clusters. NANOCLUSTERS - A BRIDGE ACROSS DISCIPLINES 2010. [DOI: 10.1016/b978-0-444-53440-8.00005-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
|
69
|
Tai TB, Grant DJ, Nguyen MT, Dixon DA. Thermochemistry and Electronic Structure of Small Boron Clusters (Bn, n = 5−13) and Their Anions. J Phys Chem A 2009; 114:994-1007. [DOI: 10.1021/jp9085848] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Truong Ba Tai
- Department of Chemistry, and Mathematical Modeling and Computational Science Center (LMCC), Katholieke Universiteit Leuven, B-3001 Leuven, Belgium, and Department of Chemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35847-0336
| | - Daniel J. Grant
- Department of Chemistry, and Mathematical Modeling and Computational Science Center (LMCC), Katholieke Universiteit Leuven, B-3001 Leuven, Belgium, and Department of Chemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35847-0336
| | - Minh Tho Nguyen
- Department of Chemistry, and Mathematical Modeling and Computational Science Center (LMCC), Katholieke Universiteit Leuven, B-3001 Leuven, Belgium, and Department of Chemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35847-0336
| | - David A. Dixon
- Department of Chemistry, and Mathematical Modeling and Computational Science Center (LMCC), Katholieke Universiteit Leuven, B-3001 Leuven, Belgium, and Department of Chemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35847-0336
| |
Collapse
|
70
|
JimÉnez-halla JOC, Matito E, Blancafort L, Robles J, Solà M. Tuning aromaticity in trigonal alkaline earth metal clusters and their alkali metal salts. J Comput Chem 2009; 30:2764-76. [DOI: 10.1002/jcc.21291] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
71
|
Tai TB, Nguyen MT. Structure and electron delocalization of the boron oxide cluster B3(BO)3 and its anion and dianion. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.10.054] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
72
|
Lin L, Kita Y, Udagawa T, Sakai S, Nguyen MT. Electronic structure of the mixed aluminum and sodium cluster Al2Na. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.06.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
73
|
Structures and aromaticity of X2Y 2 − (X = C, Si, Ge and Y = N, P, As) anions. J Mol Model 2009; 15:1329-36. [DOI: 10.1007/s00894-009-0496-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2009] [Accepted: 03/19/2009] [Indexed: 11/26/2022]
|
74
|
Nguyen MT, Matus MH, Ngan VT, Grant DJ, Dixon DA. Thermochemistry and Electronic Structure of Small Boron and Boron Oxide Clusters and Their Anions. J Phys Chem A 2009; 113:4895-909. [DOI: 10.1021/jp811391v] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Minh Tho Nguyen
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Unidad de Servicios de Apoyo en Resolución Analítica, Universidad Veracruzana, A. P. 575, Xalapa, Ver., Mexico
| | - Myrna H. Matus
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Unidad de Servicios de Apoyo en Resolución Analítica, Universidad Veracruzana, A. P. 575, Xalapa, Ver., Mexico
| | - Vu Thi Ngan
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Unidad de Servicios de Apoyo en Resolución Analítica, Universidad Veracruzana, A. P. 575, Xalapa, Ver., Mexico
| | - Daniel J. Grant
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Unidad de Servicios de Apoyo en Resolución Analítica, Universidad Veracruzana, A. P. 575, Xalapa, Ver., Mexico
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Unidad de Servicios de Apoyo en Resolución Analítica, Universidad Veracruzana, A. P. 575, Xalapa, Ver., Mexico
| |
Collapse
|
75
|
Wang XB, Chi XX. Theoretical Study on the Stable Structures and Aromaticities for Pnictogen Dianionic Sb42, Bi42, and (SbBi)22Clusters. CHINESE J CHEM PHYS 2009. [DOI: 10.1088/1674-0068/22/01/75-81] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
76
|
Miller SR, Schultz NE, Truhlar DG, Leopold DG. A study of the ground and excited states of Al3 and Al3−. II. Computational analysis of the 488nm anion photoelectron spectrum and a reconsideration of the Al3 bond dissociation energy. J Chem Phys 2009; 130:024304. [DOI: 10.1063/1.3008056] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
|
77
|
Villalta PW, Leopold DG. A study of the ground and excited states of Al3 and Al3−. I. 488 nm anion photoelectron spectrum. J Chem Phys 2009; 130:024303. [DOI: 10.1063/1.2973625] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
|
78
|
Xu WG, Zhang RC, Lu SX, Zhang YC. Structures and aromaticity of the planar B2XY (X=N, P and Y=O, S, Se) and Al2MN (M=C, Si, Ge and N=S, Se) clusters. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2008.09.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
79
|
Jones CE, Clayborne PA, Reveles JU, Melko JJ, Gupta U, Khanna SN, Castleman AW. AlnBi Clusters: Transitions Between Aromatic and Jellium Stability. J Phys Chem A 2008; 112:13316-25. [DOI: 10.1021/jp804667d] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Charles E. Jones
- Departments of Chemistry and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, and Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284
| | - Peneé A. Clayborne
- Departments of Chemistry and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, and Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284
| | - J. Ulises Reveles
- Departments of Chemistry and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, and Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284
| | - Joshua J. Melko
- Departments of Chemistry and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, and Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284
| | - Ujjwal Gupta
- Departments of Chemistry and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, and Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284
| | - Shiv N. Khanna
- Departments of Chemistry and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, and Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284
| | - A. W. Castleman
- Departments of Chemistry and Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, and Department of Physics, Virginia Commonwealth University, Richmond, Virginia 23284
| |
Collapse
|
80
|
Xu WG, Zhang RC, Lu SX, Zhang YC. Structures and aromaticity of the planar Si2BX (X=Li, K, O, S) clusters. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.theochem.2008.05.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
81
|
Höltzl T, Janssens E, Veldeman N, Veszprémi T, Lievens P, Nguyen MT. The Cu7Sc Cluster is a Stable σ-Aromatic Seven-Membered Ring. Chemphyschem 2008; 9:833-8. [DOI: 10.1002/cphc.200700752] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
82
|
Yang LM, He HP, Ding YH, Sun CC. Achieving Stable Hypercarbon CB62−-Based Cluster-Assembled Complexes: A General Strategy. Organometallics 2008. [DOI: 10.1021/om7008588] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Li-Ming Yang
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People’s Republic of China
| | - Hai-Peng He
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People’s Republic of China
| | - Yi-Hong Ding
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People’s Republic of China
| | - Chia-Chung Sun
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People’s Republic of China
| |
Collapse
|
83
|
Zubarev DY, Averkiev BB, Zhai HJ, Wang LS, Boldyrev AI. Aromaticity and antiaromaticity in transition-metal systems. Phys Chem Chem Phys 2008; 10:257-67. [DOI: 10.1039/b713646c] [Citation(s) in RCA: 169] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
84
|
Bandeira NAG, Corminboeuf C, Calhorda MJ. Can five-membered Te2N2S rings be considered aromatic? Struct Chem 2007. [DOI: 10.1007/s11224-007-9270-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
85
|
Mandado M, Krishtal A, Van Alsenoy C, Bultinck P, Hermida-Ramón JM. Bonding Study in All-Metal Clusters Containing Al4 Units. J Phys Chem A 2007; 111:11885-93. [DOI: 10.1021/jp074973y] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marcos Mandado
- Department of Physical Chemistry, University of Vigo, As Lagoas (Marcosende) sn, 36310 Vigo, Galicia, Spain, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium, and Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 (S-3), B-9000 Gent, Belgium
| | - Alisa Krishtal
- Department of Physical Chemistry, University of Vigo, As Lagoas (Marcosende) sn, 36310 Vigo, Galicia, Spain, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium, and Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 (S-3), B-9000 Gent, Belgium
| | - Christian Van Alsenoy
- Department of Physical Chemistry, University of Vigo, As Lagoas (Marcosende) sn, 36310 Vigo, Galicia, Spain, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium, and Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 (S-3), B-9000 Gent, Belgium
| | - Patrick Bultinck
- Department of Physical Chemistry, University of Vigo, As Lagoas (Marcosende) sn, 36310 Vigo, Galicia, Spain, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium, and Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 (S-3), B-9000 Gent, Belgium
| | - J. M. Hermida-Ramón
- Department of Physical Chemistry, University of Vigo, As Lagoas (Marcosende) sn, 36310 Vigo, Galicia, Spain, Department of Chemistry, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Belgium, and Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 (S-3), B-9000 Gent, Belgium
| |
Collapse
|
86
|
Fang L, Yang GC, Qiu YQ, Su ZM. Theoretical predication of third-order optical nonlinearities of [Al4MAl4] n− (n = 0–2, M = Ti, V and Cr) clusters. Theor Chem Acc 2007. [DOI: 10.1007/s00214-007-0388-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
87
|
Chattaraj PK, Giri S. Stability, Reactivity, and Aromaticity of Compounds of a Multivalent Superatom. J Phys Chem A 2007; 111:11116-21. [DOI: 10.1021/jp0760758] [Citation(s) in RCA: 188] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Santanab Giri
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India
| |
Collapse
|
88
|
Hu X, Li H. All-Metal Aromatic Complexes Show High Reactivity in the Oxidation Reaction of Methane and Some Hydrocarbons. J Phys Chem A 2007; 111:8352-6. [PMID: 17683124 DOI: 10.1021/jp0718552] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The C-H activations of methane, ethane, propane, and propene catalyzed by all-metal aromatic complexes Al(4)Fe were investigated. The results reveal that the rate-determining barrier of methane activation reaction with Al(4)Fe is lower than that of both some well-known inorganic catalysts and some metal organic catalysts. It was found that the all-metal aromatic complexes have high reactivity for the C-H activation of ethane, propane, and propene. Further research showed that the ability of all-metal aromatic complex to accept an electron and the degree of electron delocalization on its aromatic plane had obvious influences on the reactivity of Al(4)Fe. The present work predicts a new kind of catalyst for the alkyl C-H activation reaction: all-metal aromatic catalyst.
Collapse
Affiliation(s)
- Xingbang Hu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | | |
Collapse
|
89
|
Zhao YL, Zhang RJ. Structures and Properties of Stable Al4, Al4+, and Al4-Comparatively Studied by ab Initio Theories. J Phys Chem A 2007; 111:7189-93. [PMID: 17628048 DOI: 10.1021/jp0715373] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Previous high-level theoretical calculations of aluminum clusters mostly relied on density functional theory (DFT) or theories less sophisticated than it. Here, we point out that a second-order Møller-Plesset perturbation (MP2) method is more appropriate and is the minimum level of theory in the predictions of property such as geometries, electronic structures, and IR and Raman spectra of Al4, Al4+, and Al4- clusters. The theoretical electron affinities and ionization potentials predicted with MP2 geometries are closer to experimental ones than those by DFT. The p-electron characters and single valence state of aluminum atoms and IR and Raman spectra of the aluminum clusters were also reliably predicted by MP2 and could be based on for further experimental and theoretical studies.
Collapse
Affiliation(s)
- Y L Zhao
- Institute of Material Science and Engineering, Ocean University of China, Qingdao, Shandong 266100, China.
| | | |
Collapse
|
90
|
Yang LM, Wang J, Ding YH, Sun CC. Theoretical Study on the Assembly and Stabilization of a Silicon-Doped All-Metal Aromatic Unit SiAl3-. Organometallics 2007. [DOI: 10.1021/om700482b] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Li-ming Yang
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
| | - Jian Wang
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
| | - Yi-hong Ding
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
| | - Chia-chung Sun
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People's Republic of China
| |
Collapse
|
91
|
Lin YC, Sundholm D, Jusélius J, Cui LF, Li X, Zhai HJ, Wang LS. Experimental and computational studies of alkali-metal coinage-metal clusters. J Phys Chem A 2007; 110:4244-50. [PMID: 16553376 DOI: 10.1021/jp056789n] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Coinage and alkali metal mixed clusters, M4Na- (M = Cu, Au) have been investigated experimentally using photoelectron spectroscopy and computationally at correlated ab initio levels. The related Cu4Li-, Ag4Li-, Ag4Na-, and Au4Li- clusters as well as the neutral Cu4Li2 and Cu4Na2 clusters have also been studied computationally. The calculations show that the two lowest isomers of the negatively charged clusters include a pyramidal C4v structure and a planar C2v species. For Cu4Li- and Cu4Na-, the C4v structure is calculated at correlated ab initio level to be 30.9 and 16.9 kJ/mol below the planar C2v isomer, whereas the planar isomers of Au4Li- and Au4Na- are found to be 29.7 and 49.4 kJ/mol below the pyramidal ones. For Ag4Li- and Ag4Na-, the pyramidal isomers are the lowest ones. Comparison of the calculated and measured photoelectron spectra of Cu4Na- and Au4Na- shows that the pyramidal Cu4Na- cluster of C4v symmetry and the planar Au4Na- of C2v symmetry are detected experimentally. Calculations of the magnetically induced current density in Cu4Li- and Cu4Li2 using the Gauge-Including Magnetically Induced Current (GIMIC) method show that strong ring currents are sustained mainly by the highest-occupied molecular orbital primarily derived from the Cu 4s. The GIMIC calculations thus show that the Cu4(2-) ring is -aromatic and that the d orbitals do not play any significant role for the electron delocalization effects. The present study does not support the notion that the square-planar Cu4(2-) is the first example of d-orbital aromatic molecules.
Collapse
Affiliation(s)
- Ying-Chan Lin
- Department of Chemistry, P.O. Box 55 (A.I. Virtanens plats 1), FIN-00014 University of Helsinki, Finland
| | | | | | | | | | | | | |
Collapse
|
92
|
Liu ZZ, Tian WQ, Feng JK, Zhang G, Li WQ. Theoretical study on structures and aromaticities of P5(-) anion, [Ti (eta(5)-P5)]- and sandwich complex [Ti(eta(5)-P5)2]2-. J Phys Chem A 2007; 109:5645-55. [PMID: 16833897 DOI: 10.1021/jp044395a] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The equilibrium geometries, energies, harmonic vibrational frequencies, and nucleus independent chemical shifts (NICSs) of the ground state of P5(-) (D(5h)) anion, the [Ti (eta(5)-P5)]- fragment (C(5v)), and the sandwich complex [Ti(eta(5)-P5)2]2- (D(5h) and D(5d)) are calculated by the three-parameter fit of the exchange-correlation potential suggested by Becke in conjunction with the LYP exchange potential (B3LYP) with basis sets 6-311+G(2d) (for P) and 6-311+G(2df) (for Ti). In each of the three molecules, the P-P and Ti-P bond distances are perfectly equal: five P atoms in block P5(-) lie in the same plane; the P-P bond distance increases and the Ti-P bond distance decreases with the order P5(-), [Ti(eta(5)-P5)2]2-, and [Ti (eta(5)-P5)]-. The binding energy analysis, which is carried out according to the energy change of hypothetic reactions of the three species, predicts that the three species are all very stable, and [Ti (eta(5)-P5)]- (C(5v)), more stable than P5(-) and [Ti(eta(5)-P5)2]2- synthesized in the experiment, could be synthesized. NICS values, computed for the anion and moiety of the three species with GIAO-B3LYP, reveal that the three species all have a larger aromaticity, and NICS (0) of moiety, NICS (1) of moiety, and minimum NICS of the inner side of ring P5 plane in magnitude increase with the order P5(-), [Ti(eta(5)-P5)2]2-, and [Ti (eta(5)-P5)]-. By analysis of the binding energetic and the molecular orbital (MO) and qualitative MO correlation diagram, and the dissection of total NICS, dissected as NICS contributions of various bonds, it is the main reason for P5(-) (D(5h)) having the larger aromaticity that the P-P sigma bonds, and pi bonds have the larger diatropic ring currents in which NICS contribution are negative, especially the P-P sigma bond. However, in [Ti (eta(5)-P5)]- (C(5v)) and [Ti(eta(5)-P5)2]2- (D(5h), and D(5d)), the reason is the larger and more negative diatropic ring currents in which the NICS contributions of P-P pi bonds and P5-Ti bonds including pi, delta, and sigma bonds, especially P5-Ti bonds, are much more negative and canceled the NICS contributions of P and Ti core and lone pair electrons.
Collapse
Affiliation(s)
- Zi-Zhong Liu
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, JiLin University, Chang Chun 130023, China
| | | | | | | | | |
Collapse
|
93
|
Zhang RJ, Wang XQ, Cheng FL. Comparison of Magnetic Properties between Spin Singlet and Triplet Li3Al 4 − Clusters. J CLUST SCI 2007. [DOI: 10.1007/s10876-007-0116-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
94
|
Islas R, Heine T, Merino G. Structure and Electron Delocalization in Al42- and Al44-. J Chem Theory Comput 2007; 3:775-81. [DOI: 10.1021/ct700009k] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rafael Islas
- Facultad de Química, Universidad de Guanajuato, Noria Alta s/n, Guanajuato, Gto, 36050, México, and Institut für Physikalische Chemie und Elektrochemie, TU Dresden, D-01062 Dresden, Germany
| | - Thomas Heine
- Facultad de Química, Universidad de Guanajuato, Noria Alta s/n, Guanajuato, Gto, 36050, México, and Institut für Physikalische Chemie und Elektrochemie, TU Dresden, D-01062 Dresden, Germany
| | - Gabriel Merino
- Facultad de Química, Universidad de Guanajuato, Noria Alta s/n, Guanajuato, Gto, 36050, México, and Institut für Physikalische Chemie und Elektrochemie, TU Dresden, D-01062 Dresden, Germany
| |
Collapse
|
95
|
Yang LM, Ding YH, Sun CC. Sandwich-like Compounds Based on the All-Metal Aromatic Unit Al42− and the Main-Group Metals M (M=Li, Na, K, Be, Mg, Ca). Chemistry 2007; 13:2546-55. [PMID: 17171736 DOI: 10.1002/chem.200601223] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Inspired by the pioneering experimental characterisation of the all-metal aromatic unit Al(4)2- in the bimetallic molecules MAl4- (M=Li, Na, Cu) and by the very recent theoretical design of sandwich-type transition-metal complexes [Al4MAl4]q- (q=0-2; M=Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W), we used density functional theory (DFT) calculations (B3LYP/6-311+G(d) to design a series of novel non-transition-metal sandwich complexes based on the all-metal aromatic unit Al4(2-) and the main-group metals M (M=Li, Na, K, Be, Mg, Ca). The traditional homo-decked sandwich compounds [Al4MAl4]q- (without counterions) and (nM)q+[Al4MAl4]q- (with counterions M) (q=2-3, M=Li, Na, K, Be, Mg, Ca), although some of them are truly energy minima, have a much higher energy than many fused isomers. We thus concluded that it seems unlikely for Al4(2-) to sandwich the main-group metal atoms in the homo-decked sandwich form. Alternatively, we proposed a new type of sandwich complex, namely hetero-decked sandwich compounds [CpMAl4]q-, that are the ground-state structures for each M both with and without counterions. It was shown that with the rigid Cp- partner, the all-metal aromatic unit Al(4)2- might indeed act as a "superatom". These new types of all-metal aromatic unit-based sandwich complexes await future experimental verification.
Collapse
Affiliation(s)
- Li-Ming Yang
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China
| | | | | |
Collapse
|
96
|
Jasper AW, Schultz NE, Truhlar DG. Transferability of Orthogonal and Nonorthogonal Tight-Binding Models for Aluminum Clusters and Nanoparticles. J Chem Theory Comput 2006; 3:210-8. [DOI: 10.1021/ct600261s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ahren W. Jasper
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431
| | - Nathan E. Schultz
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431
| | - Donald G. Truhlar
- Department of Chemistry and Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431
| |
Collapse
|
97
|
Yang LM, Ding YH, Sun CC. Design of the Sandwich-like Compounds Based on the All-Metal Aromatic Unit Al3−. Chemphyschem 2006; 7:2478-82. [PMID: 17146756 DOI: 10.1002/cphc.200600564] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Li-ming Yang
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023 (People's Republic of China)
| | | | | |
Collapse
|
98
|
Nigam S, Majumder C, Kulshreshtha SK. Theoretical study of aromaticity in inorganic tetramer clusters. J CHEM SCI 2006. [DOI: 10.1007/bf02703955] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
99
|
Fowler PW, Rogowska A, Soncini A, Lillington M, Olson LP. Ring Currents in Tangentially p−p Bonded σ-Aromatic Systems. J Org Chem 2006; 71:6459-67. [PMID: 16901131 DOI: 10.1021/jo060788p] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a theoretical study of ring systems that delocalize electrons in a cyclic array of p orbitals arranged tangentially in sigma-bonding fashion. Sigma-bonded arrays are compared to conventional pi-bonded analogues with respect to orbital symmetry and aromatic/antiaromatic behavior. In a one-to-one correspondence between pi and tangential molecular orbitals of a cycle, local rotation turns each pi to a tangential basis function, changing bonding interactions to antibonding and inverting the order of filling of molecular orbitals. The ipsocentric ring-current mapping approach is used to evaluate aromaticity on the magnetic criterion. As for conventional pi-ring currents, the sigma-ring current in tangential p-p bonded systems is dominated by the HOMO-LUMO transition, corresponding to circulation of four electrons in diatropic (4n + 2)-electron cycles but two in paratropic (4n)-electron cycles. The systems examined here utilize either C 2p or Si 3p orbitals for delocalization. Although interchangeable with C with respect to the fundamental orbital symmetry and ring-current rules, Si bonds at greater internuclear distances, a feature that allows easier design of potentially stable sigma-aromatic structures. Calculations show the wheel-like Si10C50H70 structure 6 as a stable, neutral aromatic molecule with a diatropic ring current following the sigma-bond path formed by Si 3p orbitals.
Collapse
Affiliation(s)
- Patrick W Fowler
- Department of Chemistry, University of Sheffield, Sheffield, S3 7HF, UK.
| | | | | | | | | |
Collapse
|
100
|
Hu X, Li H, Wang C. The Reactivity of All-Metal Aromatic Complexes: A Theoretical Investigation on the Methane Activation Reaction. J Phys Chem B 2006; 110:14046-9. [PMID: 16854098 DOI: 10.1021/jp063417l] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The recent finding of all-metal aromaticity enlightens us to explore the reactivity of all-metal aromatic complexes. The methane activation reaction was chosen for this purpose. The whole catalysis process of all-metal aromatics was investigated by theoretical calculation. The results reveal that the reaction barriers with all-metal aromatic complexes are far lower than that without any catalysts. All-metal aromatic complexes are predicted to have potential to be used as catalysts for the first time.
Collapse
Affiliation(s)
- Xingbang Hu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | | | | |
Collapse
|