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Xue Y, Sexton TM, Yang J, Tschumper GS. Systematic analysis of electronic barrier heights and widths for concerted proton transfer in cyclic hydrogen bonded clusters: (HF) n, (HCl) n and (H 2O) n where n = 3, 4, 5. Phys Chem Chem Phys 2024; 26:12483-12494. [PMID: 38619858 DOI: 10.1039/d4cp00422a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
The MP2 and CCSD(T) methods are paired with correlation consistent basis sets as large as aug-cc-pVQZ to optimize the structures of the cyclic minima for (HF)n, (HCl)n and (H2O)n where n = 3-5, as well as the corresponding transition states (TSs) for concerted proton transfer (CPT). MP2 and CCSD(T) harmonic vibrational frequencies confirm the nature of each minimum and TS. Both conventional and explicitly correlated CCSD(T) computations are employed to assess the electronic dissociation energies and barrier heights for CPT near the complete basis (CBS) limit for all 9 clusters. Results for (HF)n are consistent with prior studies identifying Cnh and Dnh point group symmetry for the minima and TSs, respectively. Our computations also confirm that CPT proceeds through Cs TS structures for the C1 minima of (H2O)3 and (H2O)5, whereas the process goes through a TS with D2d symmetry for the S4 global minimum of (H2O)4. This work corroborates earlier findings that the minima for (HCl)3, (HCl)4 and (HCl)5 have C3h, S4 and C1 point group symmetry, respectively, and that the Cnh structures are not minima for n = 4 and 5. Moreover, our computations show the TSs for CPT in (HCl)3, (HCl)4 and (HCl)5 have D3h, D2d, and C2 point group symmetry, respectively. At the CCSD(T) CBS limit, (HF)4 and (HF)5 have the smallest electronic barrier heights for CPT (≈15 kcal mol-1 for both), followed by the HF trimer (≈21 kcal mol-1). The barriers are appreciably higher for the other clusters (around 27 kcal mol-1 for (H2O)4 and (HCl)3; roughly 30 kcal mol-1 for (H2O)3, (H2O)5 and (HCl)4; up to 38 kcal mol-1 for (HCl)5). At the CBS limit, MP2 significantly underestimates the CCSD(T) barrier heights (e.g., by ca. 2, 4 and 7 kcal mol-1 for the pentamers of HF, H2O and HCl, respectively), whereas CCSD overestimates these barriers by roughly the same magnitude. Scaling the barrier heights and dissociation energies by the number of fragments in the cluster reveals strong linear relationships between the two quantities and with the magnitudes of the imaginary vibrational frequency for the TSs.
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Affiliation(s)
- Yuan Xue
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677-1848, USA.
| | - Thomas More Sexton
- School of Arts and Sciences, Chemistry University of Mary, Bismark, ND 58504, USA.
| | - Johnny Yang
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677-1848, USA.
| | - Gregory S Tschumper
- Department of Chemistry and Biochemistry, University of Mississippi, University, MS 38677-1848, USA.
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Jara-Cortés J, Landeros-Rivera B, Hernández-Trujillo J. Unveiling the role of intra and interatomic interactions in the energetics of reaction schemes: a quantum chemical topology analysis. Phys Chem Chem Phys 2018; 20:27558-27570. [PMID: 30371704 DOI: 10.1039/c8cp03775b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this work we present a detailed analysis of selected reaction schemes in terms of the atomic components of the electronic energy defined by the quantum theory of atoms in molecules and the interacting quantum atoms method. The aim is to provide an interpretation tool for the energy change involved in a chemical reaction by means of the atomic and interaction contributions to the energies of the molecules involved. Ring strain in cyclic alkanes, the resonance energy of aromatic and antiaromatic molecules, local aromaticity in polycyclic aromatic hydrocarbons, intermolecular bonding in hydrogen fluoride clusters, and hydration of d-block metal dications were selected for the study. It was found that in addition to the changes in the strong C-C interactions in the carbon skeleton of the organic molecular rings, other contributions not usually considered to be important such as those between C and H atoms (either bonded or not) need to be considered in order to account for the net energy changes. The analysis unveils the role of the ionic and covalent contributions to the hydrogen bonding in HF clusters and the energetic origin and extent of cooperative effects involved. Moreover, the "double-hump" behavior observed for the hydration energy trend of [M(H2O)6]2+ complexes is explained in terms of the deformation energy of the metal cation and the increasingly covalent metal-water interactions. In addition, proper comparisons with the description provided by other methodologies are briefly discussed. The topological approach proposed in this contribution proves to be useful for the description of energy changes of apposite reaction schemes in chemically meaningful terms.
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Affiliation(s)
- Jesús Jara-Cortés
- Departamento de Física y Química Teórica, Facultad de Química, UNAM, México City, 04510, Mexico.
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Del Bene JE, Alkorta I, Elguero J. Hydrogen and Halogen Bonding in Cyclic FH(4-n):FCln Complexes, for n = 0–4. J Phys Chem A 2018; 122:2587-2597. [DOI: 10.1021/acs.jpca.8b00236] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Janet E. Del Bene
- Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, United States
| | - Ibon Alkorta
- Instituto de Química Médica (IQM-CSIC), Juan de la Cierva, 3, E-28006 Madrid, Spain
| | - José Elguero
- Instituto de Química Médica (IQM-CSIC), Juan de la Cierva, 3, E-28006 Madrid, Spain
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4
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Bang Y, Kim SH, Kim Y. Direct dynamics calculations of multiple proton transfer through hydrogen-bonded wire and the role of micro-solvation in ClONO2 + H2O → HNO3 + HOCl reactions. Theor Chem Acc 2017. [DOI: 10.1007/s00214-017-2163-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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5
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Parra RD. Cooperative effects and energy barriers to bromonium ion transfer in cyclic (BrX)n halogen-bonded clusters (X=F, OH, or NH2; n=3–5): An ab initio study. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.05.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Asselin P, Soulard P, Madebène B, Goubet M, Huet TR, Georges R, Pirali O, Roy P. The cyclic ground state structure of the HF trimer revealed by far infrared jet-cooled Fourier transform spectroscopy. Phys Chem Chem Phys 2014; 16:4797-806. [DOI: 10.1039/c3cp55047h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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7
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Saritha B, Durga Prasad M. An Electronic Structure Perspective of the Promoter Modes in Proton Transfer Reactions. J Phys Chem A 2011; 115:2802-10. [DOI: 10.1021/jp108579t] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- B. Saritha
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
| | - M. Durga Prasad
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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8
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KLOPPER WIM, QUACK MARTIN, SUHM MARTINA. Explicitly correlated coupled cluster calculations of the dissociation energies and barriers to concerted hydrogen exchange of (HF)n oligomers (n=2,3,4,5). Mol Phys 2010. [DOI: 10.1080/002689798168394] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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9
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Cybulski H, Sadlej J. Calculated Nuclear Magnetic Resonance Parameters for Multiproton-Exchange and Nonbonded-Hydrogen Rotation Processes in Cyclic Water Clusters. J Phys Chem A 2010; 115:5774-84. [DOI: 10.1021/jp107595n] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hubert Cybulski
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Joanna Sadlej
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
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McGrath MJ, Ghogomu JN, Mundy CJ, Kuo IFW, Siepmann JI. First principles Monte Carlo simulations of aggregation in the vapor phase of hydrogen fluoride. Phys Chem Chem Phys 2010; 12:7678-87. [DOI: 10.1039/b924506e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Sophy KB, Kuo JL. Structure and vibrational spectra of H+(HF)n (n=2–9) clusters: An ab initio study. J Chem Phys 2009; 131:224307. [DOI: 10.1063/1.3268502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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12
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Nguyen MT, Matus MH, Ngan VT, Haiges R, Christe KO, Dixon DA. Energetics and Mechanism of the Decomposition of Trifluoromethanol. J Phys Chem A 2008; 112:1298-312. [DOI: 10.1021/jp709796n] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [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 Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - 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 Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - 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 Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - Ralf Haiges
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - Karl O. Christe
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - 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 Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
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Gutman M, Nachliel E, Friedman R. The mechanism of proton transfer between adjacent sites on the molecular surface. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2006; 1757:931-41. [PMID: 16581015 DOI: 10.1016/j.bbabio.2006.01.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2005] [Revised: 01/19/2006] [Accepted: 01/26/2006] [Indexed: 11/20/2022]
Abstract
The surface of a protein, or a membrane, is spotted with a multitude of proton binding sites, some of which are only few A apart. When a proton is released from one site, it propagates through the water by a random walk under the bias of the local electrostatic potential determined by the distribution of the charges on the protein. Eventually, the released protons are dispersed in the bulk, but during the first few nanoseconds after the dissociation, the protons can be trapped by encounter with nearby acceptor sites. While the study of this reaction on the surface of a protein suffers from experimental and theoretical difficulties, it can be investigated with simple model compounds like derivatives of fluorescein. In the present study, we evaluate the mechanism of proton transfer reactions that proceed, preferentially, inside the Coulomb cage of the dye molecules. Kinetic analysis of the measured dynamics reveals the role of the dimension of the Coulomb cage on the efficiency of the reaction and how the ordering of the water molecules by the dye affects the kinetic isotope effect.
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Affiliation(s)
- Menachem Gutman
- Laser Laboratory for Fast Reactions in Biology, Department of Biochemistry, Tel Aviv University, Ramat Aviv, Tel Aviv, Israel.
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Kim Y, Kim Y. Dynamics of the Concerted Triple Proton Transfer in Cyclic Water Trimer Using the Multiconfiguration Molecular Mechanics Algorithm. J Phys Chem A 2005; 110:600-8. [PMID: 16405332 DOI: 10.1021/jp0530193] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Cyclic water clusters are important molecular species to understand the nature of hydrogen bonded networks. Theoretical studies for the dynamics of triple proton transfer in the cyclic water trimer were performed. The potential energy surface (PES) of triple proton transfer is generated by the multiconfiguration molecular mechanics (MCMM) algorithm. We have used the MP2/6-31G(d,p) level for high-level ab initio data (energies, gradients, and Hessians), which are used in the Shepard interpolation. Eight high-level reference points were added step by step, including two points for the critical configurations of the large curvature tunneling paths. The more high-level points are used, the better the potential energy surfaces become. The rate constant and kinetic isotope effect (KIE) for the triple proton transfer at 300 K, which have been calculated by the canonical variational transition-state theory with microcanonical optimized multidimensional semiclassical tunneling approximation, are 1.6 x 10(-3) s(-1) and 230, respectively. Tunneling is very important not only for the triple proton transfer but also for the triple deuterium transfer. The MCMM results show good agreement with those from the direct ab initio dynamics calculations.
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Affiliation(s)
- Yangsoo Kim
- Department of Chemistry, Kyung Hee University, Yong-In City, Kyunggi-Do, 449-701, Korea
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Takahashi M, Watanabe Y, Taketsugu T, Wales DJ. An ab initio study of tunneling splittings in the water trimer. J Chem Phys 2005; 123:044302. [PMID: 16095353 DOI: 10.1063/1.1954768] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Tunneling splittings in the water trimer have been determined by the semiclassical WKB method, based on pathways characterized at the computational level of second-order Møller-Plesset theory with basis sets of aug-cc-pVTZ quality. This calculation takes into account the single-flip and bifurcation tunneling rearrangements of the water trimer. The predicted splittings are 37.93 cm(-1) for the flip and 6.50x10(-3) cm(-1) for bifurcation, which agree quite well with the corresponding experimental values of 43.52 cm(-1) and 9.63x10(-3) cm(-1).
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Affiliation(s)
- Mariko Takahashi
- Department of Chemistry, Ochanomizu University, Bunkyo-ku, Tokyo 112-8610, Japan
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16
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Mezer A, Friedman R, Noivirt O, Nachliel E, Gutman M. The Mechanism of Proton Transfer between Adjacent Sites Exposed to Water. J Phys Chem B 2005; 109:11379-88. [PMID: 16852391 DOI: 10.1021/jp046213i] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The surface of a protein, or a membrane, is spotted with a multitude of proton-binding sites, some of which are only a few angstroms apart. When a proton is released from one site, it propagates through the water by a random walk under the bias of the local electrostatic potential determined by the distribution of the charges on the protein. Some of the released protons disperse into the bulk, but during the first few nanoseconds, the released protons can be trapped by encounter with nearby acceptor sites. This process resembles a scenario which corresponds with the time-dependent Debye-Smoluchowski equation. In the present study, we investigated the mechanism of proton transfer between sites that are only a few angstroms apart, using as a model the proton exchange between sites on a small molecule, fluorescein, having two, spectrally distinguishable, proton-binding sites. The first site is the oxyanion on the chromophore ring structure. The second site is the carboxylate moiety on the benzene ring of the molecule. Through our experiments, we were able to reconstruct the state of protonation at each site and the velocity of proton transfer between them. The fluorescein was protonated by a few nanosecond long proton pulse under specific conditions that ensured that the dye molecules would be protonated only by a single proton. The dynamics of the protonation of the chromophore were measured under varying initial conditions (temperature, ionic strength, and different solvents (H(2)O or D(2)O)), and the velocity of the proton transfer between the two sites was extracted from the overall global analysis of the signals. The dynamics of the proton transfer between the two proton-binding sites of the fluorescein indicated that the efficiency of the site-to-site proton transfer is very sensitive to the presence of the screening electrolyte and has a very high kinetic isotope effect (KIE = 55). These two parameters clearly distinguish the mechanism from proton diffusion in bulk water. The activation energy of the reaction (E(a) = 11 kcal mol(-1)) is also significantly higher than the activation energy for proton dissociation in bulk water (E(a) approximately 2.5 kcal mol(-1)). These observations are discussed with respect to the effect of the solute on the water molecules located within the solvation layer.
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Affiliation(s)
- Aviv Mezer
- Laser Laboratory for Fast Reactions in Biology, Department of Biochemistry, George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel
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17
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Kohanoff * JJ, Cachau RE. Multiple proton translocation in biomolecular systems: concerted to stepwise transition in a simple model. Mol Phys 2004. [DOI: 10.1080/00268970410001725738] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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18
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Watanabe Y, Taketsugu T, Wales DJ. An ab initio study of tunneling splittings in the water dimer. J Chem Phys 2004; 120:5993-9. [PMID: 15267480 DOI: 10.1063/1.1651058] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Tunneling splittings in the water dimer have been determined by the semiclassical WKB method, based on pathways characterized at the computational level of second-order Møller-Plesset (MP2) theory with basis sets of aug-cc-pVTZ quality. This calculation takes into account all three acceptor tunneling, donor-acceptor interchange, and bifurcation tunneling rearrangements of the water dimer. The tunneling splittings were evaluated as 7.73 cm(-1) (large splitting) and 0.42 cm(-1) (small splitting), which are in good agreement with the corresponding experimental values of 11.18 cm(-1) and 0.70 cm(-1), respectively.
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Affiliation(s)
- Yumiko Watanabe
- Department of Chemistry, Ochanomizu University, Bunkyo-ku, Tokyo 112-8610, Japan
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Affiliation(s)
- Frank N Keutsch
- Department of Chemistry, University of California, Berkeley, California 94720, USA
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Loerting T, Liedl KR. Water-Mediated Proton Transfer: A Mechanistic Investigation on the Example of the Hydration of Sulfur Oxides. J Phys Chem A 2001. [DOI: 10.1021/jp0038862] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Smedarchina Z, Fernández-Ramos A, Siebrand W. DOIT: a program to calculate thermal rate constants and mode-specific tunneling splittings directly from quantum-chemical calculations. J Comput Chem 2001. [DOI: 10.1002/jcc.1043] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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23
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Oudejans L, Miller RE. Photodissociation of cyclic HF complexes: Pentamer through heptamer. J Chem Phys 2000. [DOI: 10.1063/1.481877] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Blake TA, Sharpe SW, Xantheas SS. Rotationally resolved spectroscopy of a librational fundamental band of hydrogen fluoride tetramer. J Chem Phys 2000. [DOI: 10.1063/1.481846] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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25
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Reimers JR, Hall LE, Hush NS. Tautomerization of Nucleobase Model Compounds: The 4-Pyridinol and 4(1H)-Pyridinone Monomers and Their Dimers. J Phys Chem A 2000. [DOI: 10.1021/jp9939827] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jeffrey R. Reimers
- School of Chemistry and Department of Biochemistry, University of Sydney, NSW 2006, Australia
| | - Lachlan E. Hall
- School of Chemistry and Department of Biochemistry, University of Sydney, NSW 2006, Australia
| | - Noel S. Hush
- School of Chemistry and Department of Biochemistry, University of Sydney, NSW 2006, Australia
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26
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Loerting T, Liedl KR. Temperature-Dependent Ways of Proton TransferA Benchmark Study on Cyclic HF Oligomers. J Phys Chem A 1999. [DOI: 10.1021/jp9914774] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Thomas Loerting
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
| | - Klaus R. Liedl
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
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27
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Schottenberger H, Wurst K, Buchmeiser MR. X-ray structural investigations and conformational particularities of ethyne-derived organometallics based on ferrocene and fluorene. J Organomet Chem 1999. [DOI: 10.1016/s0022-328x(99)00167-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Loerting T, Liedl KR. Toward Elimination of Discrepancies between Theory and Experiment: Double Proton Transfer in Dimers of Carboxylic Acids. J Am Chem Soc 1998. [DOI: 10.1021/ja9817390] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Thomas Loerting
- Contribution from the Department of Theoretical Chemistry, Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
| | - Klaus R. Liedl
- Contribution from the Department of Theoretical Chemistry, Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
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29
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Loerting T, Liedl KR, Rode BM. Predictions of rate constants and estimates for tunneling splittings of concerted proton transfer in small cyclic water clusters. J Chem Phys 1998. [DOI: 10.1063/1.476866] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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30
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Mulholland AJ, Richards WG. Modeling Enzyme Reaction Intermediates and Transition States: Citrate Synthase. J Phys Chem B 1998. [DOI: 10.1021/jp981121c] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Adrian J. Mulholland
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, and Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, U.K
| | - W. Graham Richards
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, and Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, U.K
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REIMERS JEFFREYR, HALL LACHLANE, HUSH NOELS, SILVERBROOK KIA. Chemical Control of Tautomerization-Based Molecular Electronic and Color Switches. Ann N Y Acad Sci 1998. [DOI: 10.1111/j.1749-6632.1998.tb09863.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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Kim Y. Dynamics and Kinetic Isotope Effect for the Double Proton Transfer in Formamidine Monohydrated Complex Using Direct Semiempirical Dynamics Calculation. J Phys Chem A 1998. [DOI: 10.1021/jp9733072] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yongho Kim
- Department of Chemistry and Institute of Natural Sciences, Kyung Hee University, Yongin-City, Kyunggi-Do, 449-701 Korea
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33
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Liedl KR. Dangers of counterpoise corrected hypersurfaces. Advantages of basis set superposition improvement. J Chem Phys 1998. [DOI: 10.1063/1.475715] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Loerting T, Liedl KR, Rode BM. Large Curvature Tunneling Effects Reveal Concerted Hydrogen Exchange Rates in Cyclic Hydrogen Fluoride Clusters Comparable to Carboxylic Acid Dimers. J Am Chem Soc 1998. [DOI: 10.1021/ja972799t] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas Loerting
- Contribution from the Department of Theoretical Chemistry, Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
| | - Klaus R. Liedl
- Contribution from the Department of Theoretical Chemistry, Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
| | - Bernd M. Rode
- Contribution from the Department of Theoretical Chemistry, Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 52a, A-6020 Innsbruck, Austria
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Spectroscopy and quantum dynamics of hydrogen fluoride clusters. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s1063-5467(98)80009-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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