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Nishida Y, Aono R, Dohi H, Ding W, Uzawa H. 1H-NMR Karplus Analysis of Molecular Conformations of Glycerol under Different Solvent Conditions: A Consistent Rotational Isomerism in the Backbone Governed by Glycerol/Water Interactions. Int J Mol Sci 2023; 24:2766. [PMID: 36769086 PMCID: PMC9916874 DOI: 10.3390/ijms24032766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 02/04/2023] Open
Abstract
Glycerol is a symmetrical, small biomolecule with high flexibility in molecular conformations. Using a 1H-NMR spectroscopic Karplus analysis in our way, we analyzed a rotational isomerism in the glycero backbone which generates three kinds of staggered conformers, namely gt (gauche-trans), gg (gauche-gauche), and tg (trans-gauche), at each of sn-1,2 and sn-2,3 positions. The Karplus analysis has disclosed that the three rotamers are consistently equilibrated in water keeping the relation of 'gt:gg:tg = 50:30:20 (%)' at a wide range of concentrations (5 mM~540 mM). The observed relation means that glycerol in water favors those symmetric conformers placing 1,2,3-triol groups in a gauche/gauche geometry. We have found also that the rotational isomerism is remarkably changed when the solvent is replaced with DMSO-d6 or dimethylformamide (DMF-d7). In these solvents, glycerol gives a relation of 'gt:gg:tg = 40:30:30 (%)', which means that a remarkable shift occurs in the equilibrium between gt and tg conformers. By this shift, glycerol turns to also take non-symmetric conformers orienting one of the two vicinal diols in an antiperiplanar geometry.
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Affiliation(s)
- Yoshihiro Nishida
- Molecular Chirality Research Center, Department of Applied Biological Chemistry, Institute of Environmental Horticulture, Chiba University, Matsudo 271-8510, Japan
| | - Reina Aono
- Molecular Chirality Research Center, Department of Applied Biological Chemistry, Institute of Environmental Horticulture, Chiba University, Matsudo 271-8510, Japan
| | - Hirofumi Dohi
- Molecular Chirality Research Center, Department of Applied Biological Chemistry, Institute of Environmental Horticulture, Chiba University, Matsudo 271-8510, Japan
| | - Wuxiao Ding
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8565, Japan
| | - Hirotaka Uzawa
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8565, Japan
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2
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Geng L, Meng J, Wang X, Han C, Han K, Xiao Z, Huang M, Xu P, Zhang L, Zhou L, Mai L. Eutectic Electrolyte with Unique Solvation Structure for High-Performance Zinc-Ion Batteries. Angew Chem Int Ed Engl 2022; 61:e202206717. [PMID: 35610667 DOI: 10.1002/anie.202206717] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Indexed: 12/16/2022]
Abstract
Zinc-ion batteries (ZIB) present great potential in energy storage due to low cost and high safety. However, the poor stability, dendrite growth, and narrow electrochemical window limit their practical application. Herein, we develop a new eutectic electrolyte consisting of ethylene glycol (EG) and ZnCl2 for dendrite-free and long-lifespan ZIBs. The EG molecules participate in the Zn2+ solvation via coordination and hydrogen-bond interactions. Optimizing the ZnCl2 /EG molar ratio (1 : 4) can strengthen intermolecular interactions to form [ZnCl(EG)]+ and [ZnCl(EG)2 ]+ cations. The dissociation-reduction of these complex cations enables the formation of a Cl-rich organic-inorganic hybrid solid electrolyte interphase film on a Zn anode, realizing highly reversible Zn plating/stripping with long-term stability of ≈3200 h. Furthermore, the polyaniline||Zn cell manifests decent cycling performance with ≈78 % capacity retention after 10 000 cycles, and the assembled pouch cell demonstrates high safety and stable capacity. This work opens an avenue for developing eutectic electrolytes for high-safety and practical ZIBs.
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Affiliation(s)
- Lishan Geng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Jiashen Meng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Xuanpeng Wang
- Department of Physical Science & Technology, School of Science, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Chunhua Han
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Kang Han
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Zhitong Xiao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Meng Huang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Peng Xu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Lei Zhang
- Department of Physical Science & Technology, School of Science, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Liang Zhou
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China.,Hubei Longzhong Laboratory, Xiangyang, 441000, P. R. Hubei, China
| | - Liqiang Mai
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China.,Hubei Longzhong Laboratory, Xiangyang, 441000, P. R. Hubei, China
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Bu Y, Jiang W, Liu H, Xu J, Deng Y, Sun T, Sun L, Liang H. Hydrogen Bond Interaction in the Trade-Off Between Electrolyte Voltage Window and Supercapacitor Low-Temperature Performances. CHEMSUSCHEM 2022; 15:e202200539. [PMID: 35470971 DOI: 10.1002/cssc.202200539] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/14/2022] [Indexed: 06/14/2023]
Abstract
Liquid electrolyte determines the voltage window and extreme working temperature of supercapacitors. However, the effect of weak interaction between electrolyte species on voltage window and low-temperature capacitive performance is unclear. Herein, an electrolyte model system with increasing H-bond interaction was constructed to clarify this concern. The results indicated that strong H-bond interaction was positively correlated with the number of hydroxyls, which was beneficial to expand voltage window, but deteriorated rate performance; weak H-bond improved low-temperature performance. Supercapacitors with an optimized electrolyte presented high voltage and good low-temperature performance; even at -40 °C, the maximum energy density could be maintained at 7.0 Wh kg-1 (>80 % retention relative to at -20 °C). This study revealed the mechanism of the influence of the H-bonds on electrolyte voltage window and anti-freezing capability and provided a new insight for the design of electrolytes with both high working voltage and low-temperature performance.
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Affiliation(s)
- Yongfeng Bu
- Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Wenya Jiang
- Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Haitao Liu
- Institute of Advanced Manufacturing and Modern Equipment Technology, School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Jiang Xu
- Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Yilin Deng
- Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Tao Sun
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore, Singapore
| | - Lianshan Sun
- Institute for Energy Research, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Hongyu Liang
- Institute of Advanced Manufacturing and Modern Equipment Technology, School of Mechanical Engineering, Jiangsu University, Zhenjiang, 212013, P. R. China
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4
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Geng L, Meng J, Wang X, Han C, Han K, Xiao Z, Huang M, Xu P, Zhang L, Zhou L, Mai L. Eutectic Electrolyte with Unique Solvation Structure for High‐Performance Zinc‐Ion Batteries. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206717] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lishan Geng
- Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering CHINA
| | - Jiashen Meng
- Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering CHINA
| | - Xuanpeng Wang
- Wuhan University of Technology Department of Physical Science & Technology, School of Science CHINA
| | - Chunhua Han
- Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering CHINA
| | - Kang Han
- Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering CHINA
| | - Zhitong Xiao
- Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering CHINA
| | - Meng Huang
- Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering CHINA
| | - Peng Xu
- Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering CHINA
| | - Lei Zhang
- Wuhan University of Technology Department of Physical Science & Technology, School of Science CHINA
| | - Liang Zhou
- Wuhan University of Technology State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering CHINA
| | - Liqiang Mai
- Wuhan University of Technology 122 Luoshi Road 430070 Wuhan CHINA
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5
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Pandey SK, Arunan E. Effects of Multiple OH/SH Substitution on the H‐Bonding/Stability versus Aromaticity of Benzene Rings: From Computational Insights. ChemistrySelect 2021. [DOI: 10.1002/slct.202100689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sarvesh Kumar Pandey
- Department of Inorganic and Physical Chemistry Indian Institute of Science Bangalore Bangalore 560 012 India
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208 016 India
| | - Elangannan Arunan
- Department of Inorganic and Physical Chemistry Indian Institute of Science Bangalore Bangalore 560 012 India
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6
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Zhang Y, Liu J, Li S. Synthesis of a Flame Retardant for Epoxy Resins: Thermal Stability, Flame Retardancy, and Flame-Retardant Modes. INT POLYM PROC 2021. [DOI: 10.1515/ipp-2020-3915] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
A polyphosphonate (PDPA) flame retardant that contains phenyl phosphonic dichloride and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide groups, has been synthesized. The flame retardant was introduced into epoxy resins (EP) and cured by 4,4’-diamino diphenylmethane. The vertical burning, limited-oxygen index and cone calorimeter tests reveal that the PDPA can enhance the flame-retardant properties of the EP significantly. With only a 4 wt% PDPA loading, the EP composites achieved a limited-oxygen index value of 33.4% and a V-0 rating in the vertical burning test, and the peak heat release rate and total heat release were decreased by 40.9% and 24.6%, respectively. The thermal properties and gas pyrolysis products of the EP composites were evaluated by thermogravimetric analysis and thermogravimetric analysis-Fourier transform infrared spectroscopy, and the morphology and structure of residual char were characterized by scanning electron microscopy, Flourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. To explain the combined effects of the condensed and gas phases, modes of the flame-retardant action are proposed.
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Affiliation(s)
- Y. Zhang
- School of Biology and Chemical Engineering, Shandong Vocational College of Science & Technology , Weifang , PRC
| | - J. Liu
- School of Material Science and Engineering, Beijing Institute of Technology , Beijing , PRC
| | - S. Li
- BOE Technology Group Co., Ltd ., Beijing , PRC
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7
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Loskutov VV. Concentration Dependence of the Viscosity Activation Energy of Aqueous Ethylene Glycol Mixtures. J SOLUTION CHEM 2021. [DOI: 10.1007/s10953-021-01069-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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8
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Jindal A, Vasudevan S. Molecular Conformation and Hydrogen Bond Formation in Liquid Ethylene Glycol. J Phys Chem B 2020; 124:9136-9143. [PMID: 32945675 DOI: 10.1021/acs.jpcb.0c06324] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The ethylene glycol (EG) molecule, HOCH2CH2OH, adopts a conformation where the central OCCO dihedral is exclusively gauche in the gaseous and crystalline states, but in the liquid state, for close to 20% of the molecules, the central OCCO adopts the energetically unfavorable trans conformation. Here we report calculations, based on ab initio molecular dynamics simulations, on the thermodynamics associated with hydrogen bond formation in the liquid state of EG between donor-acceptor pairs with different molecular conformations. We establish an operational, geometric definition of hydrogen bonds in liquid EG from an analysis of the proton NMR data and show that the key feature, irrespective of the conformation, is marked directionality with almost linear ∠HO···O angles. The free energy for hydrogen bond formation estimated as the potential of mean force for the reversible work associated with the passage from a hypothetical state where hydrogen bonding is absent and donor-acceptor pairs are randomly oriented to the hydrogen-bonded state where the pairs are oriented showed comparable magnitudes irrespective of the molecular conformation of either the donor or acceptor. The results suggest that the presence of the trans conformer in liquid EG would require an understanding of its role in the extended hydrogen-bonded network of the liquid.
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Affiliation(s)
- Aman Jindal
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Sukumaran Vasudevan
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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9
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Lomas JS. Cooperativity in alkane-1,2- and 1,3-polyols: NMR, QTAIM, and IQA study of O─H … OH and C─H … OH bonding interactions. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2020; 58:666-684. [PMID: 32201981 DOI: 10.1002/mrc.5014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/26/2020] [Accepted: 02/29/2020] [Indexed: 06/10/2023]
Abstract
Proton nuclear magnetic resonance chemical shifts and atom-atom interaction energies for alkanepolyols with 1,2-diol and 1,3-diol repeat units, and for their 1:1 pyridine complexes, are computed by density functional theory calculations. In the 1,3-polyols, based on a tG'Gg' repeat unit, the only important intramolecular hydrogen bonding interactions are O─H… OH. By quantum theory of atoms in molecules analysis of the electron density, unstable bond and ring critical points are found for such interactions in 1,2-polyols with tG'g repeat units, from butane-1,2,3,4-tetrol onwards and in their pyridine complexes from propane-1,2,3-triol onwards. Several features (OH proton shifts and charges, and interaction energies computed by the interacting quantum atoms approach) are used to monitor the dependence of cooperativity on chain length: This is much less regular in 1,2-polyols than in 1,3-polyols and by most criteria has a higher damping factor. Well defined C─H… OH interactions are found in butane-1,2,3,4-tetrol and higher members of the 1,2-polyol series, as well as in their pyridine complexes: There is no evidence for cooperativity with O─H… OH bonding. For the 1,2-polyols, there is a tenuous empirical relationship between the existence of a bond critical point for O─H… OH hydrogen bonding and the interaction energies of competing exchange channels, but the primary/secondary ratio is always less than unity.
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Affiliation(s)
- John S Lomas
- ITODYS (CNRS UMR-7086), Université de Paris, Paris, France
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10
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Jindal A, Vasudevan S. Hydrogen Bonding in the Liquid State of Linear Alcohols: Molecular Dynamics and Thermodynamics. J Phys Chem B 2020; 124:3548-3555. [PMID: 32242419 DOI: 10.1021/acs.jpcb.0c01199] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Linear monohydroxy alcohols are strongly hydrogen-bonded liquids that are considered to be homologues of water. Here, we report ab initio molecular dynamics simulations of the liquid alcohols, methanol to pentanol, and from the combined radial-angular probability distribution of the intermolecular O···O distances and HO···O angles determine the geometrical parameters that define the hydrogen bonds in these systems. The key feature of hydrogen bonds in the liquid alcohols, irrespective of the size of the alkyl group, is the strong orientation dependence with the donor-acceptor HO···O angle being close to zero, similar to that observed in liquid water. Hydrogen bond formation is consequently considered to be the passage from a state where donor-acceptor pairs show no preferred orientation to one where they are almost linear. The potential of mean force, the reversible work associated with this process, is computed from the pair probability density distributions obtained from the simulations and that for a hypothetical state where donor-acceptor pairs are randomly oriented. We find that the magnitude of the free energy for hydrogen bond formation is maximum for ethanol and show that this arises from a larger electrostatic contribution to hydrogen bond formation in ethanol as compared to the other alcohols.
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Affiliation(s)
- Aman Jindal
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Sukumaran Vasudevan
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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11
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Sevryugin VA, Loskutov VV, Kosova GN. Regularities of Conductivity of Aqueous Molecular Solutions. RUSS J ELECTROCHEM+ 2020. [DOI: 10.1134/s1023193519120152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Jindal A, Vasudevan S. Geometry of OH⋯O interactions in the liquid state of linear alcohols from ab initio molecular dynamics simulations. Phys Chem Chem Phys 2020; 22:6690-6697. [DOI: 10.1039/d0cp00435a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Hydrogen bonding OH···O geometries in the liquid state of linear alcohols, derived from ab initio MD simulations, show no change from methanol to pentanol, in contrast to that observed in their crystalline state.
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Affiliation(s)
- Aman Jindal
- Department of Inorganic and Physical Chemistry
- IISc
- Bangalore
- India
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13
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Weirich L, Magalhães de Oliveira J, Merten C. How many solvent molecules are required to solvate chiral 1,2-diols with hydrogen bonding solvents? A VCD spectroscopic study. Phys Chem Chem Phys 2020; 22:1525-1533. [DOI: 10.1039/c9cp06030h] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A VCD spectroscopic analysis of selected model systems for solute–solvent interactions of chiral diols with hydrogen bonding solvents DMSO and ACN.
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Affiliation(s)
- Luisa Weirich
- Ruhr-Universität Bochum
- Fakultät für Chemie und Biochemie
- Organische Chemie II
- 44801 Bochum
- Germany
| | | | - Christian Merten
- Ruhr-Universität Bochum
- Fakultät für Chemie und Biochemie
- Organische Chemie II
- 44801 Bochum
- Germany
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14
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Abstract
For 2-X-ethanols, where X = F, OH, or NH2, the gauche conformer is favored over the trans conformer by at least 2 kcal/mol. Initially, this preference, ΔE, was attributed to an intramolecular hydrogen bond, IMHB, between the OH and X groups. Over the years, this conclusion has been challenged by two major arguments. One claim is that the entirety of ΔE can be accounted for by the gauche effect. Against this, calculations using five different methods show that the maximum contribution of the gauche effect to ΔE is less than 1 kcal/mol. A second argument employs the quantum theory of atoms in molecules to contend that the absence of a bond critical point (BCP) between the OH and X groups in 2-X-ethanols denotes the lack of an IMHB. By looking at the 2-X-ethanols at fixed XCCO torsional angles ranging from 0° to 60°, it is shown that the BCP criterion is inconsistent with other properties such as energy, bond lengths, and stretching frequencies. These inconsistencies are removed when the theory of noncovalent interactions is used. The IMHBs in 2-X-ethanols are found to be similar in form but smaller in magnitude than their intermolecular counterparts. This work concludes that 2-X-ethanols form IMHBs.
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Affiliation(s)
- Robert E Rosenberg
- Department of Chemistry, Transylvania University, 300 North Broadway, Lexington, Kentucky 40508, United States
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15
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Loskutov VV, Kosova GN. Molecular Structure of an Ethylene Glycol–Water Solution at 298 K. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2019. [DOI: 10.1134/s003602441902016x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Ghanghas R, Jindal A, Vasudevan S. Distinguishing Intra- and Intermolecular Interactions in Liquid 1,2-Ethanediol by 1H NMR and Ab Initio Molecular Dynamics. J Phys Chem B 2018; 122:9757-9762. [DOI: 10.1021/acs.jpcb.8b07750] [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)
- Ritu Ghanghas
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Aman Jindal
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Sukumaran Vasudevan
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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17
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Packard MH, Cox JH, Suding VP, Topczewski JJ. The Effect of Proximal Functionality on the Allylic Azide Equilibrium. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700693] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Mary H. Packard
- Department of Chemistry; University of Minnesota; 55455 Minneapolis MN USA
| | - James H. Cox
- Department of Chemistry; University of Minnesota; 55455 Minneapolis MN USA
| | - Victoria P. Suding
- Department of Chemistry; University of Minnesota; 55455 Minneapolis MN USA
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18
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Pung A, Leito I. Predicting Relative Stability of Conformers in Solution with COSMO-RS. J Phys Chem A 2017; 121:6823-6829. [DOI: 10.1021/acs.jpca.7b05197] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Astrid Pung
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia
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19
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Jindal A, Vasudevan S. Conformation of Ethylene Glycol in the Liquid State: Intra- versus Intermolecular Interactions. J Phys Chem B 2017; 121:5595-5600. [DOI: 10.1021/acs.jpcb.7b02853] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aman Jindal
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Sukumaran Vasudevan
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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20
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Asselin P, Madebène B, Soulard P, Georges R, Goubet M, Huet TR, Pirali O, Zehnacker-Rentien A. Competition between inter- and intra-molecular hydrogen bonding: An infrared spectroscopic study of jet-cooled amino-ethanol and its dimer. J Chem Phys 2016; 145:224313. [DOI: 10.1063/1.4972016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Pierre Asselin
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8233, MONARIS, F-75005 Paris, France
- CNRS, UMR 8233, MONARIS, F-75005 Paris, France
| | - Bruno Madebène
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8233, MONARIS, F-75005 Paris, France
- CNRS, UMR 8233, MONARIS, F-75005 Paris, France
| | - Pascale Soulard
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8233, MONARIS, F-75005 Paris, France
- CNRS, UMR 8233, MONARIS, F-75005 Paris, France
| | - Robert Georges
- Institut de Physique de Rennes, Campus de Beaulieu, Bat 11C, UMR 6251, Université de Rennes 1-CNRS, 35042 Rennes Cedex, France
| | - Manuel Goubet
- Université Lille, CNRS, UMR 8523—PhLAM–Physique des Lasers, Atomes et Molécules, F-59000 Lille, France
| | - Thérèse R. Huet
- Université Lille, CNRS, UMR 8523—PhLAM–Physique des Lasers, Atomes et Molécules, F-59000 Lille, France
| | - Olivier Pirali
- Institut des Sciences Moléculaires d’Orsay (ISMO), CNRS, University of Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France
- Ligne AILES — Synchrotron SOLEIL, L’Orme des Merisiers, F-91192 Gif-sur-Yvette Cedex, France
| | - Anne Zehnacker-Rentien
- Institut des Sciences Moléculaires d’Orsay (ISMO), CNRS, University of Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France
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Lonardi A, Oborský P, Hünenberger PH. Solvent-Modulated Influence of Intramolecular Hydrogen-Bonding on the Conformational Properties of the Hydroxymethyl Group in Glucose and Galactose: A Molecular Dynamics Simulation Study. Helv Chim Acta 2016. [DOI: 10.1002/hlca.201600158] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Alice Lonardi
- Laboratory of Physical Chemistry; ETH Hönggerberg; HCI; CH-8093 Zürich Switzerland
| | - Pavel Oborský
- Laboratory of Physical Chemistry; ETH Hönggerberg; HCI; CH-8093 Zürich Switzerland
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22
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Lomas JS, Joubert L, Maurel F. Association of symmetrical alkane diols with pyridine: DFT/GIAO calculation of 1 H NMR chemical shifts. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2016; 54:805-814. [PMID: 27247256 DOI: 10.1002/mrc.4457] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 05/04/2016] [Accepted: 05/05/2016] [Indexed: 06/05/2023]
Abstract
Proton nuclear magnetic resonance (NMR) shifts of the free diol and of its 1 : 1 and 1 : 2 hydrogen-bonded complexes with pyridine have been computed for five symmetrical alkane diols on the basis of density functional theory, by applying the gauge-including atomic orbital method to geometry-optimized conformers. For certain conformers, intramolecular OH···OH interactions, evidenced by high NMR OH proton shifts, are further enhanced on going from the free diol to the corresponding 1 : 1 diol/pyridine complex. This is confirmed by atoms-in-molecules and non-covalent interaction plots. The computed OH and CH proton shifts for the diol and the two complexes correlate well with values obtained by analysing data from the NMR titration of the diols in benzene against pyridine. Shift values for the diols in neat pyridine are calculated by weighting the shifts of the various protons in the three forms (free diol, 1 : 1 and 1 : 2 diol/pyridine complexes) according to the experimentally determined association constants. The results are in good agreement with those observed, and after empirical scaling, the root mean square difference is 0.18 ppm. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- John S Lomas
- ITODYS (UMR 7086), Univ Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Laurent Joubert
- Normandy Univ., COBRA UMR 6014 & FR 3038, Université de Rouen, INSA Rouen, CNRS, France
| | - François Maurel
- ITODYS (UMR 7086), Univ Paris Diderot, Sorbonne Paris Cité, Paris, France
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23
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The role of nonbonding interactions and the presence of fluoride on the conformational isomerism of 1,2-ethanediol. Chem Phys 2016. [DOI: 10.1016/j.chemphys.2016.04.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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24
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Measurement, Interpretation and Use of Free Ligand Solution Conformations in Drug Discovery. PROGRESS IN MEDICINAL CHEMISTRY 2016; 55:45-147. [DOI: 10.1016/bs.pmch.2015.10.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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25
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Schrøder SD, Wallberg JH, Kroll JA, Maroun Z, Vaida V, Kjaergaard HG. Intramolecular Hydrogen Bonding in Methyl Lactate. J Phys Chem A 2015; 119:9692-702. [DOI: 10.1021/acs.jpca.5b04812] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sidsel D. Schrøder
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Jens H. Wallberg
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Jay A. Kroll
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
- Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado 80309, United States
| | - Zeina Maroun
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Veronica Vaida
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
- Cooperative Institute for Research in Environmental Sciences, Boulder, Colorado 80309, United States
| | - Henrik G. Kjaergaard
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
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26
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PANDEY SARVESHKUMAR, DAS PRASANTA, DAS PUSPENDUK, ARUNAN ELANGANNAN, MANOGARAN SADASIVAM. Intramolecular hydrogen bond: Can it be part of the basis set of valence internal coordinates in normal mode analysis? J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0866-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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Das P, Das PK, Arunan E. Conformational stability and intramolecular hydrogen bonding in 1,2-ethanediol and 1,4-butanediol. J Phys Chem A 2015; 119:3710-20. [PMID: 25839224 DOI: 10.1021/jp512686s] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The gas-phase infrared spectra of 1,2-ED and 1,4-BD have been recorded at three different temperatures using a multipass gas cell of 6 m optical path length. DFT calculation has also been carried out using 6-311++G** and aug-cc-pVDZ basis sets to look for the existence of intramolecular hydrogen bonding in them from the red shift and infrared absorption intensity enhancement of the bonded O-H band compared to that of the free O-H band. Equilibrium population analysis with 10 conformers of 1,2-ED and 1,4-BD at experimental temperatures were carried out for the reconstruction of the observed vibrational spectra at that temperature using standard statistical relationships. The most abundant conformer at experimental temperatures was identified. In 1,2-ED a red shift of 45 cm(-1) in the intramolecularly interacting O-H stretching vibrational band position and no significant intensity enhancement compared to that of the free O-H have been observed. On the contrary, in one of the hydrogen-bonded conformers of 1,4-BD, a 124 cm(-1) red shift in the O-H stretching frequency and a 8.5 times intensity enhancement for the "bonded" O-H compared to that of the "free" O-H is seen. On the basis of this comparative study, we have concluded that strong intramolecular hydrogen bonding exists in 1,4-BD. But there appears to be weak intramolecular hydrogen bonding in 1,2-ED at temperatures of 303, 313, and 323 K in the gas phase. We have found that most stable hydrogen-bonded conformers of 1,4-BD are less populated than some of the non-hydrogen-bonded conformers. Even for the 1,4-BD, the relative population of the g'GG'Gt conformer, which has a strong intramolecular hydrogen bond, is less than what is predicted. Perhaps the intramolecular hydrogen bond plays a less significant role in the relative stability of the various conformers than what has been predicted from calculations and prevails in the literature.
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Affiliation(s)
- Prasanta Das
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Puspendu K Das
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - E Arunan
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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28
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Shimizu Y, Blanchard JW, Pustelny S, Saielli G, Bagno A, Ledbetter MP, Budker D, Pines A. Zero-field nuclear magnetic resonance spectroscopy of viscous liquids. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2015; 250:1-6. [PMID: 25459881 DOI: 10.1016/j.jmr.2014.10.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/11/2014] [Accepted: 10/11/2014] [Indexed: 05/27/2023]
Abstract
We report zero-field NMR measurements of a viscous organic liquid, ethylene glycol. Zero-field spectra were taken showing resolved scalar spin-spin coupling (J-coupling) for ethylene glycol at different temperatures and water contents. Molecular dynamics strongly affects the resonance linewidth, which closely follows viscosity. Quantum chemical calculations have been used to obtain the relative stability and coupling constants of all ethylene glycol conformers. The results show the potential of zero-field NMR as a probe of molecular structure and dynamics in a wide range of environments, including viscous fluids.
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Affiliation(s)
- Y Shimizu
- Department of Physics, University of California at Berkeley, CA 94720-7300, United States; Department of Physics, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan
| | - J W Blanchard
- Department of Chemistry, University of California at Berkeley, CA 94720, United States; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States.
| | - S Pustelny
- Department of Physics, University of California at Berkeley, CA 94720-7300, United States
| | - G Saielli
- CNR Institute on Membrane Technology, Padova Unit, Via Marzolo, 1, 35131 Padova, Italy
| | - A Bagno
- Department of Chemical Sciences, University of Padova, Via Marzolo, 1, 35131 Padova, Italy
| | - M P Ledbetter
- Department of Physics, University of California at Berkeley, CA 94720-7300, United States
| | - D Budker
- Department of Physics, University of California at Berkeley, CA 94720-7300, United States; Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Helmholtz-Institut Mainz, Johannes Gutenberg University, Germany
| | - A Pines
- Department of Chemistry, University of California at Berkeley, CA 94720, United States; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
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29
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Arunan E, Mani D. Dynamics of the chemical bond: inter- and intra-molecular hydrogen bond. Faraday Discuss 2015; 177:51-64. [DOI: 10.1039/c4fd00167b] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this discussion, we show that a static definition of a ‘bond’ is not viable by looking at a few examples for both inter- and intra-molecular hydrogen bonding. This follows from our earlier work (Goswami and Arunan,Phys. Chem. Chem. Phys.2009,11, 8974) which showed a practical way to differentiate ‘hydrogen bonding’ from ‘van der Waals interaction’. We report results fromab initioand atoms in molecules theoretical calculations for a series of Rg⋯HX complexes (Rg = He/Ne/Ar and X = F/Cl/Br) and ethane-1,2-diol. Results for the Rg⋯HX/DX complexes show that Rg⋯DX could have a ‘deuterium bond’ even when Rg⋯HX is not ‘hydrogen bonded’, according to the practical criterion given by Goswami and Arunan. Results for ethane-1,2-diol show that an ‘intra-molecular hydrogen bond’ can appear during a normal mode vibration which is dominated by the O⋯O stretching, though a ‘bond’ is not found in the equilibrium structure. This dynamical ‘bond’ formation may nevertheless be important in ensuring the continuity of electron density across a molecule. In the former case, a vibration ‘breaks’ an existing bond and in the later case, a vibration leads to ‘bond’ formation. In both cases, the molecule/complex stays bound irrespective of what happens to this ‘hydrogen bond’. Both these cases push the borders on the recent IUPAC recommendation on hydrogen bonding (Arunanet al. Pure. Appl. Chem.2011,831637) and justify the inclusive nature of the definition.
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Affiliation(s)
- Elangannan Arunan
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bangalore
- India 560012
| | - Devendra Mani
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bangalore
- India 560012
- Department of Physical Chemistry II
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30
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Nagy PI. Competing intramolecular vs. intermolecular hydrogen bonds in solution. Int J Mol Sci 2014; 15:19562-633. [PMID: 25353178 PMCID: PMC4264129 DOI: 10.3390/ijms151119562] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 09/17/2014] [Accepted: 10/13/2014] [Indexed: 11/17/2022] Open
Abstract
A hydrogen bond for a local-minimum-energy structure can be identified according to the definition of the International Union of Pure and Applied Chemistry (IUPAC recommendation 2011) or by finding a special bond critical point on the density map of the structure in the framework of the atoms-in-molecules theory. Nonetheless, a given structural conformation may be simply favored by electrostatic interactions. The present review surveys the in-solution competition of the conformations with intramolecular vs. intermolecular hydrogen bonds for different types of small organic molecules. In their most stable gas-phase structure, an intramolecular hydrogen bond is possible. In a protic solution, the intramolecular hydrogen bond may disrupt in favor of two solute-solvent intermolecular hydrogen bonds. The balance of the increased internal energy and the stabilizing effect of the solute-solvent interactions regulates the new conformer composition in the liquid phase. The review additionally considers the solvent effects on the stability of simple dimeric systems as revealed from molecular dynamics simulations or on the basis of the calculated potential of mean force curves. Finally, studies of the solvent effects on the type of the intermolecular hydrogen bond (neutral or ionic) in acid-base complexes have been surveyed.
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Affiliation(s)
- Peter I Nagy
- Center for Drug Design and Development, the University of Toledo, Toledo, OH 43606-3390, USA.
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31
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Lomas JS. 1H NMR spectra of butane-1,4-diol and other 1,4-diols: DFT calculation of shifts and coupling constants. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2014; 52:87-97. [PMID: 24519848 DOI: 10.1002/mrc.4039] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 12/03/2013] [Accepted: 12/09/2013] [Indexed: 06/03/2023]
Abstract
The proton nuclear magnetic resonance (NMR) spectra of butane-1,4-diol, pentane-1,4-diol, (S,S)-hexane-2,5-diol, 2,5-dimethylhexane-2,5-diol and cyclohexane-1,4-diols (cis and trans) in benzene and some other solvents have been analysed. The conformer distribution and the NMR shifts of these diols in benzene have been computed on the basis of the density functional theory, the solvent being included by means of the integral-equation-formalism polarizable continuum model implemented in Gaussian 09. Relative Gibbs energies of all conformers are calculated at the Perdew, Burke and Ernzerhof (PBE)0/6-311+G(d,p) level and NMR shifts by the gauge-including atomic orbital method with the PBE0/6-311+G(d,p) geometry and the cc-pVTZ basis set. Vicinal three-bond coupling constants for the acyclic diols are calculated from the relative conformer populations, the geometries and generalized Karplus equations developed by Altona's group; these correlate well with the experimental values. The solvent dependence of coupling constants for butane-1,4-diol is attributed to conformational change. Coupling constants for the rigid cyclohexane-1,4-diols do not change with solvent and are readily explained in terms of their geometries. The NMR shifts of hydrogen-bonded protons in individual conformers of alkane-1,n-diols show a very rough correlation with the OH · · · OH distances. The computed overall NMR shifts for CH protons in 1,2-diols, 1,3-diols and 1,4-diols are systematically high but correlate very well with the experimental values, with a gradient of 1.07 ± 0.01; those for OH protons correlate less well.
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Affiliation(s)
- John S Lomas
- Université Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086, F-75205, Paris, France
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32
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Liu AT, Nag M, Carroll WR, Roberts JD. Conformational analysis of N,N,N-Trimethyl-(3,3-dimethylbutyl)ammonium iodide by NMR spectroscopy: a sterically hindered trans-standard. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2013; 51:701-704. [PMID: 25940961 DOI: 10.1002/mrc.4003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 08/01/2013] [Accepted: 08/03/2013] [Indexed: 06/04/2023]
Abstract
A predominantly trans-1,2-disubstituted ethane system - N,N,N-trimethyl-(3,3-dimethylbutyl)ammonium iodide - is of particular interest for conformational analysis, because it contains both an organic and a highly polar substituent, making it soluble and thus applicable to study in a large variety of solvents. The fraction of the trans conformer of this molecule in a wide range of protic and aprotic solvents was determined by the nuclear magnetic resonance proton couplings to be approximately 90%, in contrast to the previously assumed 100%. The consistently strong preference of the trans conformation should establish N,N,N-trimethyl-(3,3-dimethylbutyl)ammonium iodide as a possibly useful 'trans-standard' in conformational analysis, much more so than 1,2-ditert-butylethane, which has a poor solubility in many solvents.
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Affiliation(s)
- Albert Tianxiang Liu
- Gates and Crellin Laboratories of Chemistry, California Institute of Technology, Pasadena, California, 91125
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33
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Mackeprang K, Schrøder SD, Kjaergaard HG. Weak intramolecular OH⋯π hydrogen bonding in methallyl- and allyl-carbinol. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.07.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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34
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Lomas JS. 1H NMR spectra of alkane-1,3-diols in benzene: GIAO/DFT shift calculations. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2013; 51:469-481. [PMID: 23784999 DOI: 10.1002/mrc.3973] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 05/07/2013] [Accepted: 05/07/2013] [Indexed: 06/02/2023]
Abstract
The proton nuclear magnetic resonance (NMR) spectra of propane-1,3-diol, 2-methylpropane-1,3-diol, 2,2-dimethylpropane-1,3-diol, butane-1,3-diol, 3-methylbutane-1,3-diol, pentane-2,4-diols (dl and meso), 2-methylpentane-2,4-diol and cyclohexane-1,3-diols (cis and trans) in benzene have been analysed. The conformer distribution and the NMR shifts of these diols have been computed on the basis of density functional theory, the solvent being included by means of the integral equation formalism phase continuum model (IEFPCM) implemented in Gaussian 09. Relative Gibbs energies of all conformers are calculated at the Perdew, Burke and Ernzerhof (PBE)0/6-311 + G(d,p) level, and NMR shifts by the gauge-including atomic orbital method with the PBE0/6-311 + G(d,p) geometry and the cc-pVTZ basis set. Vicinal coupling constants for 1,2- and 1,3-diols are rationalised in terms of relative conformer populations and geometries. The NMR shifts of hydrogen-bonded protons in individual conformers of alkane-1,n-diols show a very rough correlation with the OH⋯OH distances. The computed overall NMR shifts for CH protons in 1,2- and 1,3-diols are systematically high but correlate very well with the experimental values, with a gradient of 1.07 ± 0.01. Some values for nonequivalent methylene protons in 1,3-diols are reversed, calculation giving enhanced values for the proton anti to the COH bonds. Errors in the NMR shifts computed for the OH protons of nonsymmetrical diols appear to be related to relative populations of conformers where one or other of the OH groups is the donor. Some results based on the second-order Møller-Plesset approach, the Becke three-parameter Lee-Yang-Parr method and on the IEFPCM solvation model implemented in Gaussian 03 are included.
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Affiliation(s)
- John S Lomas
- Univ Paris Diderot, Sorbonne Paris Cité, ITODYS, UMR 7086, F-75205, Paris, France
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35
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Zhang N, Li W, Chen C, Zuo J, Weng L. Molecular dynamics study on water self-diffusion in aqueous mixtures of methanol, ethylene glycol and glycerol: investigations from the point of view of hydrogen bonding. Mol Phys 2013. [DOI: 10.1080/00268976.2012.760050] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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36
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Codling DJ, Zheng G, Stait-Gardner T, Yang S, Nilsson M, Price WS. Diffusion Studies of Dihydroxybenzene Isomers in Water–Alcohol Systems. J Phys Chem B 2013; 117:2734-41. [DOI: 10.1021/jp311044a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Dale J. Codling
- Nanoscale Organisation and Dynamics
Group, School of Science and Health, University of Western Sydney, Penrith, NSW 2751, Australia
| | - Gang Zheng
- Nanoscale Organisation and Dynamics
Group, School of Science and Health, University of Western Sydney, Penrith, NSW 2751, Australia
| | - Tim Stait-Gardner
- Nanoscale Organisation and Dynamics
Group, School of Science and Health, University of Western Sydney, Penrith, NSW 2751, Australia
| | - Shu Yang
- CAS Key Lab for Biological Effects
of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, No.11 BeiYiTiao ZhongGuanCun,
100190 Beijing, People’s Republic of China
| | - Mathias Nilsson
- Department of Food Science, Faculty
of Science, University of Copenhagen, Rolighedsvej
30, DK - 1958 Frederiksberg C, Denmark
- School of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL,
United Kingdom
| | - William S. Price
- Nanoscale Organisation and Dynamics
Group, School of Science and Health, University of Western Sydney, Penrith, NSW 2751, Australia
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37
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Lomas JS. 1H NMR spectra of ethane-1,2-diol and other vicinal diols in benzene: GIAO/DFT shift calculations. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2013; 51:32-41. [PMID: 23169263 DOI: 10.1002/mrc.3899] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 10/16/2012] [Accepted: 10/16/2012] [Indexed: 06/01/2023]
Abstract
The proton NMR spectra of several 1,2-diols in benzene have been analysed so as to associate each magnetically nonequivalent proton with its chemical shift. The shifts and coupling constants of the OH and methylene protons of ethane-1,2-diol have been determined in a wide range of solvents. The conformer distribution and the proton NMR shifts of these 1,2-diols in benzene have been computed on the basis of density functional theory. The solvent is included using the integral-equation-formalism polarizable continuum model implemented in Gaussian 09. Relative Gibbs energies for all stable conformers are calculated at the Perdew, Burke and Enzerhof (PBE)0/6-311 + G(d,p) level, and shifts are calculated using the gauge-including atomic orbital method with the PBE0/6-311 + G(d,p) geometry but using the cc-pVTZ basis set. Previous calculations on ethane-1,2-diol and propane-1,2-diol have been corrected and extended. New calculations on tert-butylethane-1,2-diol, phenylethane-1,2-diol, butane-2,3-diols (dl and meso) and cyclohexane-1,2-diols (cis and trans) are presented. Overall, the computed NMR shifts are in good agreement with experimental values for the OH protons but remain systematically high for CH protons. Some results based on the Gaussian 03 solvation model are included for comparison.
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Affiliation(s)
- John S Lomas
- ITODYS, Université Paris Diderot, Sorbonne Paris Cité, UMR 7086, F-75205, Paris, France
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38
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Fortes AD, Suard E. Crystal structures of ethylene glycol and ethylene glycol monohydrate. J Chem Phys 2011; 135:234501. [DOI: 10.1063/1.3668311] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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39
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Rönkkö HL, Knuuttila H, Haukka M, Pakkanen TT. 1H NMR and X-ray studies on hydrogen bonding in alkyloxy ethanols and their MgCl2 adducts. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.07.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Lomas JS, Maurel F, Adenier A. 1
H NMR study of the hetero-association of non-symmetrical diols with pyridine; GIAO/DFT calculations on diols. J PHYS ORG CHEM 2011. [DOI: 10.1002/poc.1831] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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41
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Lomas JS. 1H NMR study of through-bond and through-space effects in the hetero-association of pyridine with alkane diols. J PHYS ORG CHEM 2011. [DOI: 10.1002/poc.1716] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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42
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Chopra D, Guru Row TN, Arunan E, Klein RA. Crystalline ethane-1,2-diol does not have intra-molecular hydrogen bonding: Experimental and theoretical charge density studies. J Mol Struct 2010. [DOI: 10.1016/j.molstruc.2009.11.021] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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43
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Lämmermann A, Szatmári I, Fülöp F, Kleinpeter E. Inter- or Intramolecular N···H−O or N−H···O Hydrogen Bonding in 1,3-Amino-α/β-naphthols: An Experimental NMR and Computational Study. J Phys Chem A 2009; 113:6197-205. [DOI: 10.1021/jp902731n] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anica Lämmermann
- Department of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam(Golm), Germany, and the Research Group for Stereochemistry, Hungarian Academy of Sciences-Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös u. 6., H-6720 Szeged, Hungary
| | - István Szatmári
- Department of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam(Golm), Germany, and the Research Group for Stereochemistry, Hungarian Academy of Sciences-Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös u. 6., H-6720 Szeged, Hungary
| | - Ferenc Fülöp
- Department of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam(Golm), Germany, and the Research Group for Stereochemistry, Hungarian Academy of Sciences-Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös u. 6., H-6720 Szeged, Hungary
| | - Erich Kleinpeter
- Department of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam(Golm), Germany, and the Research Group for Stereochemistry, Hungarian Academy of Sciences-Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös u. 6., H-6720 Szeged, Hungary
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44
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Smith AA, Drake MD, Rahim AK, Roberts JD. Determination of the Dihedral Angle of the Monoanion of Succinic Acid in Aprotic Media. J Phys Chem A 2008; 112:12367-71. [DOI: 10.1021/jp801644a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Albert A. Smith
- California Institute of Technology, 1200 East California Blvd. Pasadena, California 91125
| | - Michael D. Drake
- California Institute of Technology, 1200 East California Blvd. Pasadena, California 91125
| | - Andreas K. Rahim
- California Institute of Technology, 1200 East California Blvd. Pasadena, California 91125
| | - John D. Roberts
- California Institute of Technology, 1200 East California Blvd. Pasadena, California 91125
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45
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de Greef TFA, Nieuwenhuizen MML, Stals PJM, Fitié CFC, Palmans ARA, Sijbesma RP, Meijer EW. The influence of ethylene glycol chains on the thermodynamics of hydrogen-bonded supramolecular assemblies in apolar solvents. Chem Commun (Camb) 2008:4306-8. [DOI: 10.1039/b806506c] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Smith TD, Gerken JB, Jog PV, Roberts JD. Conformational Equilibria of Ethanolamine and Its Hydrochloride in Solution. Org Lett 2007; 9:4555-7. [PMID: 17910463 DOI: 10.1021/ol7020077] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The conformational preferences of ethanolamine and its hydrochloride in solution were estimated by comparing experimental NMR vicinal proton-proton coupling constants to semiemprical coupling constants for each staggered rotamer, derived by the Haasnoot-Altona method. Strong gauche preferences are observed for both ethanolamine and its hydrochloride over a wide range of solvent polarities. Concentration was not observed to significantly affect the position of the conformer equilibria.
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Affiliation(s)
- Tim D Smith
- Gates and Crellin Laboratories of Chemistry, California Institute of Technology, Pasadena, California 91125, USA
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47
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Adaligil E, Davis BD, Hilmey DG, Shen Y, Spruell JM, Brodbelt JS, Houk KN, Paquette LA. Synthesis of, and Structural Assignments to the Stereoisomers of Bis (2,2‘)- and Tris (2,2‘,2‘ ‘)-Tetrahydrofurans: Conformational Features and Ionic Binding Capacities of These Gateway Polycyclic Networks. J Org Chem 2007; 72:6215-23. [PMID: 17629342 DOI: 10.1021/jo0708238] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Construction of the polytetrahydrofuranyl building blocks 6-10 from the common bissiloxyacetone precursor 11 is detailed. The approach is concise and, for the bis-(THF) pair, capitalizes on the full retention of configuration observed during the rhodium-promoted decarbonylation of aldehydes 18 and 19. The capability of the title compounds to associate with alkali metal ions in solution and the gas phase has demonstrated a preference for Li+ over Na+ and K+ in all cases, with 6 and 7 exhibiting somewhat higher binding selectivities than 8-10. The relative energy orderings of attainable conformations with the bis-THF and tris-THF series were explored computationally. The various envelope arrangements present in the individual THF units are shown to play a significant role alongside prevailing gauche interactions. The "gauche effect" is shown computationally not to be an accurate predictor of the lowest energy conformer.
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Affiliation(s)
- Emel Adaligil
- Department of Chemistry and Biochemistry, University of California-Los Angeles, 405 Hilgard Avenue, Los Angeles, CA 90095-1569, USA
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48
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Soroushian B, Lampre I, Bonin J, Pernot P, Pommeret S, Mostafavi M. Solvation dynamics of the electron produced by two-photon ionization of liquid polyols. 1. Ethylene glycol. J Phys Chem A 2007; 110:1705-17. [PMID: 16450999 DOI: 10.1021/jp0540149] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Solvated electrons have been produced in ethylene glycol by two-photon ionization of the solvent with 263 nm femtosecond laser pulses. The two-photon absorption coefficient of ethylene glycol at 263 nm is determined to be beta = (2.1 +/- 0.2) x 10(-11) m W(-1). The dynamics of electron solvation in ethylene glycol has been studied by pump-probe transient absorption spectroscopy. So, time-resolved absorption spectra ranging from 430 to 710 nm have been measured. A blue shift of the spectra is observed for the first tens of picoseconds. Using the Bayesian data analysis method, the observed solvation dynamics are reconstructed with different models: stepwise mechanisms, continuous relaxation models, or combinations of stepwise and continuous relaxation. Comparison between models is in favor of continuous relaxation, which is mainly governed by solvent molecular motions.
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Affiliation(s)
- B Soroushian
- Laboratoire de Chimie Physique/ELYSE, UMR 8000 CNRS/Université Paris-Sud, Centre d'Orsay, Bât. 349, 91405 Orsay Cedex, France
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49
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Locke JM, Crumbie RL, Griffith R, Bailey TD, Boyd S, Roberts JD. Probing Molecular Shape. 1. Conformational Studies of 5-Hydroxyhexahydropyrimidine and Related Compounds. J Org Chem 2007; 72:4156-62. [PMID: 17439182 DOI: 10.1021/jo0704863] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Understanding the factors that determine molecular shape enables scientists to begin to understand and tailor molecular properties and reactivity. Many biomolecules and bioactive compounds contain aliphatic heterocyclic rings whose conformations play a major role in their biological activity. The interplay of a number of factors, both steric and electronic, is examined for 5-hydroxyhexahydropyrimidine (1) and related compounds with use of spectroscopy and molecular modeling.
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Affiliation(s)
- Julie M Locke
- University of Western Sydney, Campbelltown Campus, Penrith, NSW 1795, Australia
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50
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Roberts JD. Fascination with the conformational analysis of succinic acid, as evaluated by NMR spectroscopy, and why. Acc Chem Res 2006; 39:889-96. [PMID: 17176027 DOI: 10.1021/ar050229p] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A serendipitous effort to use NMR spectroscopy to determine the conformational preferences of succinate monoanion opened a Pandora's box of unexpected uncertainties as to what influences such preferences of succinic acid in its various ionization states, not only in water but also in other less polar protic solvents, as well as a range of aprotic solvents. The dianion in aprotic solvents shows substantial gauche preferences, which give the appearance of violating Coulomb's law.
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Affiliation(s)
- John D Roberts
- Crellin Laboratory of Chemistry, California Institute of Technology, Pasadena, CA 91125, USA
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