1
|
Soper AK. Through the looking glass and into the liquid. Mol Phys 2019. [DOI: 10.1080/00268976.2019.1649497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Alan K. Soper
- ISIS Facility, UKRI-STFC Rutherford Appleton Laboratory, Didcot, UK
| |
Collapse
|
2
|
von Domaros M, Perlt E. Anharmonic effects in the quantum cluster equilibrium method. J Chem Phys 2017; 146:124114. [PMID: 28388115 DOI: 10.1063/1.4978958] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The well-established quantum cluster equilibrium (QCE) model provides a statistical thermodynamic framework to apply high-level ab initio calculations of finite cluster structures to macroscopic liquid phases using the partition function. So far, the harmonic approximation has been applied throughout the calculations. In this article, we apply an important correction in the evaluation of the one-particle partition function and account for anharmonicity. Therefore, we implemented an analytical approximation to the Morse partition function and the derivatives of its logarithm with respect to temperature, which are required for the evaluation of thermodynamic quantities. This anharmonic QCE approach has been applied to liquid hydrogen chloride and cluster distributions, and the molar volume, the volumetric thermal expansion coefficient, and the isobaric heat capacity have been calculated. An improved description for all properties is observed if anharmonic effects are considered.
Collapse
Affiliation(s)
- Michael von Domaros
- Mulliken Center for Theoretical Chemistry, University of Bonn, Beringstr. 6, D-53115 Bonn, Germany
| | - Eva Perlt
- Mulliken Center for Theoretical Chemistry, University of Bonn, Beringstr. 6, D-53115 Bonn, Germany
| |
Collapse
|
3
|
Bakó I, Oláh J, Lábas A, Bálint S, Pusztai L, Bellissent Funel MC. Water-formamide mixtures: Topology of the hydrogen-bonded network. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2016.10.052] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
4
|
Fábián B, Idrissi A, Marekha B, Jedlovszky P. Local lateral environment of the molecules at the surface of DMSO-water mixtures. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:404002. [PMID: 27506283 DOI: 10.1088/0953-8984/28/40/404002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Molecular dynamics simulations of the liquid-vapour interface of dimethyl sulphoxide (DMSO)-water mixtures of 11 different compositions, including two neat systems are performed on the canonical (N, V, T) ensemble at 298 K. The molecules constituting the surface layer of these systems are selected by means of the identification of the truly interfacial molecules (ITIM) method, and their local lateral environment at the liquid surface is investigated by performing Voronoi analysis. The obtained results reveal that both molecules prefer to be in a mixed local environment, consisting of both kinds of molecules, at the liquid surface, and this preference is even stronger here than in the bulk liquid phase. Neat-like patches, in which a molecule is surrounded by like neighbours, are not found. However, vacancies that are surrounded solely by water molecules are observed at the liquid surface. Our results show that strongly hydrogen bonded DMSO·H2O complexes, known to exist in the bulk phase of these mixtures, are absent from the liquid surface.
Collapse
Affiliation(s)
- Balázs Fábián
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért tér 4, H-1111 Budapest, Hungary. Institut UTINAM (CNRS UMR 6213), Université Bourgogne Franche-Comté, 16 route de Gray, F-25030 Besançon, France
| | | | | | | |
Collapse
|
5
|
Bakó I, Pálinkás G, Grósz T, Bálint S, Tóth G, Radnai T. A new approach to the determination of the uncertainty in neutron diffraction experiments with isotopic substitution method. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.07.001] [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]
|
6
|
The Radial Distribution Functions of Water as Derived from Radiation Total Scattering Experiments: Is There Anything We Can Say for Sure? ACTA ACUST UNITED AC 2013. [DOI: 10.1155/2013/279463] [Citation(s) in RCA: 177] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The present paper reviews the investigation of ambient water structure and focusses in particular on the determination of the radial distribution functions of water from total experimental radiation
scattering experiments. A novel method for removing the inelastic scattering from neutron data is introduced, and the effect of Compton scattering on X-ray data is discussed. In addition the extent to which quantum effects can be discerned between heavy and light water is analysed against these more recent data. It is concluded that, with the help of modern data analysis and computer simulation tools to interrogate the scattering data, a considerable degree of consistency can be obtained between recent and past scattering experiments on water. That consistency also gives a realistic estimate of the likely uncertainties in the extracted radial distribution functions, as well as offering a benchmark against which future experiments can be judged.
Collapse
|
7
|
Determination of the Structure of Fluid Deuterium Chloride by Neutron Diffraction at High Pressure. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19910950507] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
8
|
Gutwerk D, Bausenwein T, Bertagnolli H. The determination of Lennard-Jones potential parameters of fluid hydrogenchloride by RISM calculations over a broad range of densities. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19940980705] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
9
|
Megyes T, Bálint S, Peter E, Grósz T, Bakó I, Krienke H, Bellissent-Funel MC. Solution structure of NaNO3 in water: diffraction and molecular dynamics simulation study. J Phys Chem B 2009; 113:4054-64. [PMID: 19231825 DOI: 10.1021/jp806411c] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The structure of a series of aqueous sodium nitrate solutions (1.9-7.6 M) was studied using a combination of experimental and theoretical methods. The results obtained from diffraction (X-ray, neutron) and molecular dynamics simulation have been compared and the capabilities and limitations of the methods in describing solution structure are discussed. For the solutions studied, diffraction methods were found to perform very well in description of hydration spheres of the sodium ion but do not yield detailed structural information on the anion's hydration structure. Molecular dynamics simulations proved to be a suitable tool in the detailed interpretation of the hydration sphere of ions, ion pair formation, and bulk structure of solutions.
Collapse
Affiliation(s)
- Tünde Megyes
- Institute of Structural Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, Budapest, Hungary.
| | | | | | | | | | | | | |
Collapse
|
10
|
Water structure around dipeptides in aqueous solutions. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2008; 37:647-55. [DOI: 10.1007/s00249-008-0292-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2007] [Revised: 02/07/2008] [Accepted: 02/11/2008] [Indexed: 11/30/2022]
|
11
|
Megyes T, Bálint S, Grósz T, Radnai T, Bakó I, Almásy L. Structure of liquid nitromethane: Comparison of simulation and diffraction studies. J Chem Phys 2007; 126:164507. [PMID: 17477614 DOI: 10.1063/1.2721559] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Simulation (molecular dynamics and Car-Parrinello [Phys. Rev. Lett. 55, 2471 (1985)]) and diffraction (x-ray and neutron) studies on nitromethane are compared aiming at the determination of the liquid structure. Beyond that, the capabilities of the methods to describe liquid structure are discussed. For the studied liquid, the diffraction methods are performing very well in the determination of intramolecular structure, but they do not give detailed structural information on the intermolecular structure. The good agreement between the diffraction experiments and the results of molecular dynamics simulations justifies the use of simulations for the more detailed description of the liquid structure using partial radial distribution functions and orientational correlation functions. Liquid nitromethane is described as a molecular liquid without strong intermolecular interactions such as hydrogen bonding, but with detectable orientational correlations resulting in preferential antiparallel order of the neighboring molecules.
Collapse
Affiliation(s)
- Tünde Megyes
- Institute of Structural Chemistry, Chemical Research Center of the Hungarian Academy of Sciences, Pusztaszeri út 59-67, H-1025 Budapest, Hungary.
| | | | | | | | | | | |
Collapse
|
12
|
|
13
|
Megyes T, Bakó I, Bálint S, Grósz T, Radnai T. Ion pairing in aqueous calcium chloride solution: Molecular dynamics simulation and diffraction studies. J Mol Liq 2006. [DOI: 10.1016/j.molliq.2006.08.013] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
14
|
McLain SE, Soper AK, Watts A. Structural Studies on the Hydration of l-Glutamic Acid in Solution. J Phys Chem B 2006; 110:21251-8. [PMID: 17048953 DOI: 10.1021/jp062383e] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A combination of neutron diffraction augmented with isotopic substitution and computer modeling using empirical potential structure refinement has been used to extract detailed structural information for L-glutamic acid dissolved in 2 M NaOH solution. This work shows that the tetrahedral hydrogen bonding network in water is severely disrupted by the addition of glutamic acid and NaOH, with the number of water-water hydrogen bonds being reduced from 1.8 bonds per water molecule in pure water to 1.4 bonds per water molecule in the present solution. In the glutamic acid molecule, each carboxylate oxygen atom forms an average of three hydrogen bonds with the surrounding water solvent with one of these hydrogens being shared between the two oxygen atoms on each carboxylate group, while each amine hydrogen forms a single hydrogen bond with the surrounding water solvent. Additionally, the average conformation of the glutamic acid molecules in these solutions is extracted.
Collapse
Affiliation(s)
- Sylvia E McLain
- Rutherford Appleton Laboratory, ISIS Facility, Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom.
| | | | | |
Collapse
|
15
|
Megyes T, Bálint S, Bakó I, Grósz T, Radnai T, Pálinkás G. Solvation of calcium ion in methanol: Comparison of diffraction studies and molecular dynamics simulation. Chem Phys 2006. [DOI: 10.1016/j.chemphys.2006.05.014] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
16
|
Powles J, Osae E, Dore J, Chieux P. The structure of liquid deuterium chloride by slow-neutron scattering. Mol Phys 2006. [DOI: 10.1080/00268978100101871] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- J.G. Powles
- a The Physics Laboratories, University of Kent , Canterbury , England
| | - E.K. Osae
- a The Physics Laboratories, University of Kent , Canterbury , England
| | - J.C. Dore
- a The Physics Laboratories, University of Kent , Canterbury , England
| | - P. Chieux
- b Institut Laue-Langevin , Grenoble , France
| |
Collapse
|
17
|
Haymet A, Morse MD, Rice SA. Structural test for intermolecular force models of crystalline HC1. Mol Phys 2006. [DOI: 10.1080/00268978100102211] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- A.D.J. Haymet
- a The Department of Chemistry and The James Franck Institute , The University of Chicago , Chicago , Illinois , 60637 , U.S.A
| | - Michael D. Morse
- a The Department of Chemistry and The James Franck Institute , The University of Chicago , Chicago , Illinois , 60637 , U.S.A
| | - Stuart A. Rice
- a The Department of Chemistry and The James Franck Institute , The University of Chicago , Chicago , Illinois , 60637 , U.S.A
| |
Collapse
|
18
|
|
19
|
|
20
|
Powles J, Dore J, Osae E, Clarke J, Chieux P, Cummings S. The structure of liquid deuterium bromide by slow-neutron scattering. Mol Phys 2006. [DOI: 10.1080/00268978100103071] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
21
|
|
22
|
|
23
|
Evans W, Powles J. The computer simulation of the dielectric properties of polar liquids. The dielectric constant and relaxation of liquid hydrogen chloride. Mol Phys 2006. [DOI: 10.1080/00268978200100541] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
24
|
McLain SE, Soper AK, Luzar A. Orientational correlations in liquid acetone and dimethyl sulfoxide: A comparative study. J Chem Phys 2006; 124:74502. [PMID: 16497052 DOI: 10.1063/1.2170077] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The structure of acetone and dimethyl sulfoxide in the liquid state is investigated using a combination of neutron diffraction measurements and empirical potential structure refinement (EPSR) modeling. By extracting the orientational correlations from the EPSR model, the alignment of dipoles in both fluids is identified. At short distances the dipoles or neighboring molecules are found to be in antiparallel configurations, but further out the molecules tend to be aligned predominately as head to tail in the manner of dipolar ordering. The distribution of these orientations in space around a central molecule is strongly influenced by the underlying symmetry of the central molecule. In both liquids there is evidence for weak methyl hydrogen to oxygen intermolecular contacts, though these probably do not constitute hydrogen bonds as such.
Collapse
Affiliation(s)
- Sylvia E McLain
- ISIS Facility, Rutherford Appleton Laboratories, Chilton, Didcot, UK.
| | | | | |
Collapse
|
25
|
Megyes T, Bakó I, Radnai T, Grósz T, Kosztolányi T, Mroz B, Probst M. Structural investigation of lithium iodide in liquid dimethyl sulfoxide: Comparison between experiment and computation. Chem Phys 2006. [DOI: 10.1016/j.chemphys.2005.08.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
26
|
Onthong U, Megyes T, Bakó I, Radnai T, Grósz T, Hermansson K, Probst M. X-ray and neutron diffraction studies and molecular dynamics simulations of liquid DMSO. Phys Chem Chem Phys 2004. [DOI: 10.1039/b311027c] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
27
|
Bakó I, Grósz T, Pálinkás G, Bellissent-Funel MC. Ethylene glycol dimers in the liquid phase: A study by x-ray and neutron diffraction. J Chem Phys 2003. [DOI: 10.1063/1.1536163] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
28
|
Balucani U, Pasqualini D, Garberoglio G, Vallauri R, Sutmann G. Collective dynamics of liquid HCl: The density–density and longitudinal current correlations. J Chem Phys 2003. [DOI: 10.1063/1.1524620] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
29
|
Abstract
The development of theories of water structure has been hindered in the past by the difficulty of experimental measurement. Both measurement and computer modelling studies have now reached the stage where theoretical treatments of water structure are converging to a broadly acceptable model. In current understanding, water is a mixture of randomly hydrogen-bonded molecules and larger structures comprised of tetrahedral oxygen centres which, when hydrogen-bonded to each other, lead to five-membered and other rings which can aggregate to form three-dimensional structures. Evidence is taken from studies of the ices, from clathrates and other solid solutions, as well as from liquid solutions, that certain motifs occur very frequently and have relatively high stability, such as the (H2O)20 cavity-forming structure known from studies on clathrates. The implications of recent models of water structure for an understanding of biological events, including the interactions of drugs with receptors, are profound. It is becoming clear that modelling of aqueous solutions of any molecule must consider the explicit interactions with water molecules, which should not be regarded as a continuum: water itself is not a continuum. Solute molecules which possess hydrogen-bonding groups will provoke the formation of further hydrogen-bonding chains of water molecules: if these can form rings, such ringswilltend to persist longerthan chains, givingthesolute a secondary identity of associated water which may play a role in molecular recognition. Solutes that do not have hydrogen-bonding capability, or regions of solutes which are non-polar, may also produce partial cage-like water structures that are characteristic of the solute. The classification of many solutes as structure makers or structure breakers has relevance to the interactions between ligands and large biomolecules such as proteins. While it is generally accepted that sulfate and urea, respectively structure maker and breaker, may alter protein conformation through effects on water, it has not been recognised that bioactive ligands, which also change the conformation of proteins, may do so by a related, but more selective, mechanism. Very early studies of cell contents suggested that the associated water might be different from bulk water, a concept that lost support in the mid-20th century. Current theories of water structure may invite a reappraisal of this position, given the observation that structuring may extend for many molecular diameters from an ordered surface.
Collapse
Affiliation(s)
- T H Plumridge
- Department of Pharmaceutical Sciences, University of Strathclyde, Strathclyde Institute of Biomedical Sciences, Glasgow, UK
| | | |
Collapse
|
30
|
McLain SE, Benmore CJ, Turner JFC. The structure of liquid fluorosulfuric acid investigated by neutron diffraction. J Chem Phys 2002. [DOI: 10.1063/1.1495395] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
31
|
|
32
|
Balucani U, Pasqualini D, Sutmann G, Vallauri R. The collective dynamical properties of HCl: The transverse current correlations. J Chem Phys 2001. [DOI: 10.1063/1.1352643] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
33
|
Londono JD, Annis BK, Habenschuss A, Smith GD, Borodin O, Tso C, Hsieh ET, Soper AK. Hydrogen–hydrogen intermolecular structure of polyethylene in the melt. J Chem Phys 1999. [DOI: 10.1063/1.478785] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
34
|
Bakó I, Pálinkás G, Dore JC, Fischer HE. Structural studies of a water/dioxane mixture by neutron diffraction with hydrogen/deuterium substitution. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)00079-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
35
|
|
36
|
Chatzis G, Chalaris M, Samios J. Structural and dynamical properties of HCl dissolved in CCl4. A molecular dynamics study. Chem Phys 1998. [DOI: 10.1016/s0301-0104(97)00338-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
37
|
Andreani C, Ricci MA, Nardone M, Ricci FP, Soper AK. Orientational correlations and hydrogen bonding in liquid hydrogen chloride. J Chem Phys 1997. [DOI: 10.1063/1.474368] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
38
|
Polydorou NG, Wicks JD, Turner JZ. Hydrophobic interaction of tetrapropylammonium ions in water: A neutron diffraction and reverse Monte Carlo study. J Chem Phys 1997. [DOI: 10.1063/1.474365] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
39
|
W. Neilson G, K. Adya A. Chapter 4. Neutron diffraction studies on liquids. ACTA ACUST UNITED AC 1997. [DOI: 10.1039/pc093101] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
40
|
Alvarez M, Lomba E, Martín C, Lombardero M. Atom–atom structure factors of hydrogen halides: A molecular approach revisited. J Chem Phys 1995. [DOI: 10.1063/1.470044] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
41
|
Elrod MJ, Saykally RJ. Determination of the intermolecular potential energy surface for (HCl)2 from vibration--rotation--tunneling spectra. J Chem Phys 1995; 103:933-49. [PMID: 11539397 DOI: 10.1063/1.469794] [Citation(s) in RCA: 77] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
An accurate and detailed semiempirical intermolecular potential energy surface for (HCl)2 has been determined by a direct nonlinear least-squares fit to 33 microwave, far-infrared and near-infrared spectroscopic quantities using the analytical potential model of Bunker et al. [J. Mol. Spectrosc. 146, 200 (l99l)] and a rigorous four-dimensional dynamical method (described in the accompanying paper). The global minimum (De= -692 cm-1) is located near the hydrogen-bonded L-shaped geometry (R=3.746 angstroms, theta1=9 degrees, theta2=89.8 degrees, and phi=180 degrees). The marked influence of anisotropic repulsive forces is evidenced in the radial dependence of the donor-acceptor interchange tunneling pathway. The minimum energy pathway in this low barrier (48 cm-1) process involves a contraction of 0.1 angstroms in the center of mass distance (R) at the C2h symmetry barrier position. The new surface is much more accurate than either the ab initio formulation of Bunker et al. or a previous semiempirical surface [J. Chem. Phys. 78, 6841 (1983)].
Collapse
Affiliation(s)
- M J Elrod
- Department of Chemistry, University of California, Berkeley 94720, USA
| | | |
Collapse
|
42
|
Londono JD, Annis BK, Turner JZ, Soper AK. The intermolecular hydrogen–hydrogen structure of chain–molecule liquids from neutron diffraction. J Chem Phys 1994. [DOI: 10.1063/1.468212] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
43
|
Andreani C, Menzinger F, Ricci MA, Soper AK, Dreyer J. Neutron diffraction from liquid hydrogen bromide: Study of the orientational correlations. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:3811-3820. [PMID: 10011273 DOI: 10.1103/physrevb.49.3811] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
|
44
|
Luzar A, Soper AK, Chandler D. Combined neutron diffraction and computer simulation study of liquid dimethyl sulphoxide. J Chem Phys 1993. [DOI: 10.1063/1.465828] [Citation(s) in RCA: 102] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
45
|
Luzar A, Chandler D. Structure and hydrogen bond dynamics of water–dimethyl sulfoxide mixtures by computer simulations. J Chem Phys 1993. [DOI: 10.1063/1.464521] [Citation(s) in RCA: 696] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
46
|
Andreani C, Nardone M, Ricci FP, Soper AK. Neutron-diffraction study of liquid hydrogen iodide. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1992; 46:4709-4716. [PMID: 9908689 DOI: 10.1103/physreva.46.4709] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
47
|
Soper AK, Luzar A. A neutron diffraction study of dimethyl sulphoxide–water mixtures. J Chem Phys 1992. [DOI: 10.1063/1.463259] [Citation(s) in RCA: 216] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
48
|
|
49
|
Andreani C, Merlo V, Ricci M, Soper A. Neutron diffraction study of the partial pair correlation functions of liquid hydrogen sulphide. Mol Phys 1991. [DOI: 10.1080/00268979100101271] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
50
|
Steinhauser O, Boresch S, Bertagnolli H. The effect of density variation on the structure of liquid hydrogen chloride. A Monte Carlo study. J Chem Phys 1990. [DOI: 10.1063/1.459015] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|