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51
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Li P, Bu Y, Ai H. Conformational Study of Glycine Amide Using Density Functional Theory. J Phys Chem A 2003. [DOI: 10.1021/jp034886f] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ping Li
- Institute of Theoretical Chemistry, Shandong University, Jinan 250100, P. R. China, and Department of Chemistry, Qufu Normal University, Qufu 273165, P. R. China
| | - Yuxiang Bu
- Institute of Theoretical Chemistry, Shandong University, Jinan 250100, P. R. China, and Department of Chemistry, Qufu Normal University, Qufu 273165, P. R. China
| | - Hongqi Ai
- Institute of Theoretical Chemistry, Shandong University, Jinan 250100, P. R. China, and Department of Chemistry, Qufu Normal University, Qufu 273165, P. R. China
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55
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Ireta J, Neugebauer J, Scheffler M, Rojo A, Galván M. Density Functional Theory Study of the Cooperativity of Hydrogen Bonds in Finite and Infinite α-Helices. J Phys Chem B 2003. [DOI: 10.1021/jp026848m] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joel Ireta
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin-Dahlem, Germany, Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México D. F. 09340, and Programa de Simulación Molecular, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas No. 152 México D. F
| | - Jörg Neugebauer
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin-Dahlem, Germany, Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México D. F. 09340, and Programa de Simulación Molecular, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas No. 152 México D. F
| | - Matthias Scheffler
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin-Dahlem, Germany, Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México D. F. 09340, and Programa de Simulación Molecular, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas No. 152 México D. F
| | - Arturo Rojo
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin-Dahlem, Germany, Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México D. F. 09340, and Programa de Simulación Molecular, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas No. 152 México D. F
| | - Marcelo Galván
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, D-14195 Berlin-Dahlem, Germany, Departamento de Química, División de Ciencias Básicas e Ingeniería, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México D. F. 09340, and Programa de Simulación Molecular, Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas No. 152 México D. F
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Del Bene JE, Perera SA, Bartlett RJ, Alkorta I, Elguero J, Mó O, Yáñez M. One-Bond (1dJH-H) and Three-Bond (3dJX-M) Spin−Spin Coupling Constants Across X−H···H−M Dihydrogen Bonds. J Phys Chem A 2002. [DOI: 10.1021/jp021160v] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Janet E. Del Bene
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - S. Ajith Perera
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - Rodney J. Bartlett
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - Ibon Alkorta
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - José Elguero
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - Otilia Mó
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - Manuel Yáñez
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
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58
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Bühl M, Wipff G. Hydronium ion complex of 18-crown-6: where are the protons? A density functional study of static and dynamic properties. J Am Chem Soc 2002; 124:4473-80. [PMID: 11960477 DOI: 10.1021/ja012428j] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A quantum-chemical study employing the BLYP density functional is reported for the complex of H3O+ with 18-crown-6. According to a Car-Parrinello molecular dynamics (CPMD) study at 340 K, the complex is quite flexible, and is characterized by three quasi-linear (two-center) hydrogen-bond interactions for most of the time. On a time scale of 10 ps, frequent inversions of H3O+ are observed, as well as two 120 degrees rotations switching the hydrogen bonds from one set of crown-ether O atoms to the other. These results are consistent with density-functional studies of stationary points on the potential energy surface, which show how the crown "catalyzes" the guest's inversion. Two close-lying minima are characterized, as well as two distinct transition states connecting them, either via H3O+ inversion or rotation, with barriers of 1.0 and 4.6 kcal/mol, respectively, at the BLYP/II'//BLYP/6-31G level. Orbital interactions between lone pairs on ether O atoms and hydronium sigma(OH) antibonding orbitals are important factors for the directionality of the hydrogen bonds.
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Affiliation(s)
- Michael Bühl
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany.
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