51
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Boily JF, Seward TM. On the Dissociation of Methyl Orange: Spectrophotometric Investigation in Aqueous Solutions from 10 to 90 ∘C and Theoretical Evidence for Intramolecular Dihydrogen Bonding. J SOLUTION CHEM 2005. [DOI: 10.1007/s10953-005-8514-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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52
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Schlund S, Mladenovic M, Basílio Janke EM, Engels B, Weisz K. Geometry and Cooperativity Effects in Adenosine−Carboxylic Acid Complexes. J Am Chem Soc 2005; 127:16151-8. [PMID: 16287303 DOI: 10.1021/ja0531430] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
NMR experiments and theoretical investigations were performed on hydrogen bonded complexes of specifically 1- and 7-15N-labeled adenine nucleosides with carboxylic acids. By employing a freonic solvent of CDClF2 and CDF3, NMR spectra were acquired at temperatures as low as 123 K, where the regime of slow hydrogen bond exchange is reached and several higher-order complexes were found to coexist in solution. Unlike acetic acid, chloroacetic acid forms Watson-Crick complexes with the proton largely displaced from oxygen to the nitrogen acceptor in an ion pairing structure. Calculated geometries and chemical shifts of the proton in the hydrogen bridge favorably agree with experimentally determined values if vibrational averaging and solvent effects are taken into account. The results indicate that binding a second acidic ligand at the adenine Hoogsteen site in a ternary complex weakens the hydrogen bond to the Watson-Crick bound carboxylic acid. However, substituting a second adenine nucleobase for a carboxylic acid in the trimolecular complex leads to cooperative binding at Watson-Crick and Hoogsteen faces of adenosine.
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Affiliation(s)
- Sebastian Schlund
- Institut für Organische Chemie, Universität Würzburg, Am Hubland, D-97070 Würzburg, Germany
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53
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Abstract
This Account presents our view of unconventional intermolecular hydrogen bonds (HBs) for organometallic complexes and transition-metal or main-group hydrides. Over the past decade, low-temperature spectroscopic (IR, UV, and NMR) studies combined with theoretical calculations have disclosed the static and dynamic features of different HBs. Their guiding role in the proton-transfer processes was determined, as well as the energetic characteristics of HB intermediates and the activation barriers. Nevertheless, there is still much to explore in terms of the prediction of HB properties and control of protonation/deprotonation processes.
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Affiliation(s)
- Natalia V Belkova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, Moscow 119991, Russia
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54
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Solimannejad M, Scheiner S. Theoretical Investigation of the Weakly Dihydrogen Bonded Complexes FArCCH···HBeX (X = H, F, Cl, Br). J Phys Chem A 2005; 109:6137-9. [PMID: 16833952 DOI: 10.1021/jp052534y] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An ab initio computational study of the properties of four linear dihydrogen-bonded complexes formed between the first compound with an Ar-C chemical bond (FArCCH) and HBeX (X = H, F, Cl, and Br) molecules was undertaken at the MP2/6-311++G(2d,2p) level of theory. The calculated complexation energy at MP2 and G2(MP2) levels decreases in the order HBeH...HCCArF > BrBeH...HCCArF > ClBeH...HCCArF > FBeH...HCCArF. The intermolecular stretching frequency, and shifts within the monomers, are compared with the energetic strength of complexation.
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55
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Hugas D, Simon S, Duran M. MH⋅sHX Dihydrogen Bond with M≡Li, Na and X≡F, Cl, Br: A CP-Corrected PES Calculation and an AIM Analysis. Struct Chem 2005. [DOI: 10.1007/s11224-005-4456-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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56
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Pacios LF. Change with the Intermolecular Distance of Electron Properties of Hydrogen Bond Dimers at Equilibrium and Non-equilibrium Geometries. Struct Chem 2005. [DOI: 10.1007/s11224-005-4454-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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57
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Grabowski SJ, Sokalski WA, Leszczynski J. How Short Can the H···H Intermolecular Contact Be? New Findings that Reveal the Covalent Nature of Extremely Strong Interactions. J Phys Chem A 2005; 109:4331-41. [PMID: 16833763 DOI: 10.1021/jp0444215] [Citation(s) in RCA: 155] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ab initio calculations at the MP2/6-311++G(d,p) and MP2/aug-cc-pVDZ//MP2/aug-cc-pVTZ levels have been performed for the following complexes: H2OH+...HBeH, H2OH+...HBeBeH, H2OH+...HBeF, HClOH+...HBeH, Cl2OH+...HBeH, and Cl2OH+...HBeF. For all dimers considered, extremely short H...H intermolecular contacts (1.0-1.3 A) were obtained. These are the shortest intermolecular distances which have ever been reported, with binding energies within the range of 13.7-24.3 kcal/mol (MP2/aug-cc-pVDZ//MP2/aug-cc-pVTZ level). The interaction energies of the complexes analyzed were also extrapolated to the complete basis set (CBS) limit. To explain the nature of such strong interactions, the Bader theory was applied, and the characteristics of the bond critical points (BCPs) were analyzed. It was pointed out that for the major part of the H...H contacts considered here the Laplacian of the electron density at H...H BCP is negative indicating the partly covalent nature of such a connection. The term "covalent character of the hydrogen bond" used sometimes in recent studies is discussed. An analysis of the interaction energy components for dihydrogen bonded systems considered indicates that in contrast to conventional hydrogen bonded systems the attractive electrostatic term is outweighed by the repulsive exchange energy term and that the higher order delocalization energy term is the most important attractive term.
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Affiliation(s)
- Sławomir J Grabowski
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland.
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58
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Bakhmutov VI. Proton Transfer to Hydride Ligands with Formation of Dihydrogen Complexes: A Physicochemical View. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200400697] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Vladimir I. Bakhmutov
- Department of Chemistry, Texas A&M University, College Station, Texas 77843‐3255, USA
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59
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Recent Advances in Nonclassical Interligand Si…H Interactions. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2005. [DOI: 10.1016/s0065-3055(05)53006-5] [Citation(s) in RCA: 172] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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60
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Belkova NV, Collange E, Dub P, Epstein LM, Lemenovskii DA, Lledós A, Maresca O, Maseras F, Poli R, Revin PO, Shubina ES, Vorontsov EV. Experimental and Computational Studies of Hydrogen Bonding and Proton Transfer to [Cp*Fe(dppe)H]. Chemistry 2004; 11:873-88. [PMID: 15580590 DOI: 10.1002/chem.200400700] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The present contribution reports experimental and computational investigations of the interaction between [Cp*Fe(dppe)H] and different proton donors (HA). The focus is on the structure of the proton transfer intermediates and on the potential energy surface of the proton transfer leading to the dihydrogen complex [Cp*Fe(dppe)(H2)]+. With p-nitrophenol (PNP) a UV/Visible study provides evidence of the formation of the ion-pair stabilized by a hydrogen bond between the nonclassical cation [Cp*Fe(dppe)(H2)]+ and the homoconjugated anion ([AHA]-). With trifluoroacetic acid (TFA), the hydrogen-bonded ion pair containing the simple conjugate base (A-) in equilibrium with the free ions is observed by IR spectroscopy when using a deficit of the proton donor. An excess leads to the formation of the homoconjugated anion. The interaction with hexafluoroisopropanol (HFIP) was investigated quantitatively by IR spectroscopy and by 1H and 31P NMR spectroscopy at low temperatures (200-260 K) and by stopped-flow kinetics at about room temperature (288-308 K). The hydrogen bond formation to give [Cp*Fe(dppe)H]HA is characterized by DeltaH degrees =-6.5+/-0.4 kcal mol(-1) and DeltaS degrees = -18.6+/-1.7 cal mol(-1) K(-1). The activation barrier for the proton transfer step, which occurs only upon intervention of a second HFIP molecule, is DeltaH(not equal) = 2.6+/-0.3 kcal mol(-1) and DeltaS(not equal) = -44.5+/-1.1 cal mol(-1) K(-1). The computational investigation (at the DFT/B3 LYP level with inclusion of solvent effects by the polarizable continuum model) reproduces all the qualitative findings, provided the correct number of proton donor molecules are used in the model. The proton transfer process is, however, computed to be less exothermic than observed in the experiment.
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Affiliation(s)
- Natalia V Belkova
- Nesmeyanov Institute of Organoelement Compounds (INEOS) Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia
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61
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Lipkowski P, Grabowski SJ, Robinson TL, Leszczynski J. Properties of the C−H···H Dihydrogen Bond: An ab Initio and Topological Analysis. J Phys Chem A 2004. [DOI: 10.1021/jp048562i] [Citation(s) in RCA: 221] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paweł Lipkowski
- Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 27, 50−370 Wrocław, Poland, and Department of Crystallography and Crystal Chemistry, University of Łódź 90-236 Łódź, ul. Pomorska 149/153, Poland
| | - Sławomir J. Grabowski
- Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 27, 50−370 Wrocław, Poland, and Department of Crystallography and Crystal Chemistry, University of Łódź 90-236 Łódź, ul. Pomorska 149/153, Poland
| | - Teri L. Robinson
- Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 27, 50−370 Wrocław, Poland, and Department of Crystallography and Crystal Chemistry, University of Łódź 90-236 Łódź, ul. Pomorska 149/153, Poland
| | - Jerzy Leszczynski
- Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 27, 50−370 Wrocław, Poland, and Department of Crystallography and Crystal Chemistry, University of Łódź 90-236 Łódź, ul. Pomorska 149/153, Poland
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62
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63
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Gil A, Sodupe M, Bertran J. Unusual hydrogen bonds in [AH3–H3O]+ radical cations (A=C, Si, Ge, Sn and Pb). Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.07.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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64
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Grabowski SJ, Dubis AT, Martynowski D, Główka M, Palusiak M, Leszczynski J. Crystal and Molecular Structure of Pyrrole-2-carboxylic Acid; π-Electron Delocalization of Its Dimers−DFT and MP2 Calculations. J Phys Chem A 2004. [DOI: 10.1021/jp0373595] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sławomir J. Grabowski
- Department of Crystallography and Crystal Chemistry, University of Łódź, ul. Pomorska 149/153, 90-236 Łódź, Poland, Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland, and Department of X-ray and Chemical Crystallography, Institute of General and Ecological Chemistry, Technical University of Łódź, ul. Zwirki 36, 90
| | - Alina T. Dubis
- Department of Crystallography and Crystal Chemistry, University of Łódź, ul. Pomorska 149/153, 90-236 Łódź, Poland, Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland, and Department of X-ray and Chemical Crystallography, Institute of General and Ecological Chemistry, Technical University of Łódź, ul. Zwirki 36, 90
| | - Dariusz Martynowski
- Department of Crystallography and Crystal Chemistry, University of Łódź, ul. Pomorska 149/153, 90-236 Łódź, Poland, Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland, and Department of X-ray and Chemical Crystallography, Institute of General and Ecological Chemistry, Technical University of Łódź, ul. Zwirki 36, 90
| | - Marek Główka
- Department of Crystallography and Crystal Chemistry, University of Łódź, ul. Pomorska 149/153, 90-236 Łódź, Poland, Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland, and Department of X-ray and Chemical Crystallography, Institute of General and Ecological Chemistry, Technical University of Łódź, ul. Zwirki 36, 90
| | - Marcin Palusiak
- Department of Crystallography and Crystal Chemistry, University of Łódź, ul. Pomorska 149/153, 90-236 Łódź, Poland, Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland, and Department of X-ray and Chemical Crystallography, Institute of General and Ecological Chemistry, Technical University of Łódź, ul. Zwirki 36, 90
| | - Jerzy Leszczynski
- Department of Crystallography and Crystal Chemistry, University of Łódź, ul. Pomorska 149/153, 90-236 Łódź, Poland, Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland, and Department of X-ray and Chemical Crystallography, Institute of General and Ecological Chemistry, Technical University of Łódź, ul. Zwirki 36, 90
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65
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Grabowski SJ, Sokalski WA, Leszczynski J. Nature of X−H+δ···-δH−Y Dihydrogen Bonds and X−H···σ Interactions. J Phys Chem A 2004. [DOI: 10.1021/jp049874o] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sławomir J. Grabowski
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, and Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - W. Andrzej Sokalski
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, and Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Jerzy Leszczynski
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Computational Center for Molecular Structure and Interactions, Department of Chemistry, Jackson State University, Jackson, Mississippi 39217, and Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland
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66
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Solimannejad M, Boutalib A. A computational study of the weakly bound dimers XBeH⋯HArF (X=H, F, Cl and Br). Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.03.127] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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67
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Hugas D, Simon S, Duran M. Counterpoise-corrected potential energy surfaces for dihydrogen bonded systems. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.01.083] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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68
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Grabowski SJ, Robinson TL, Leszczynski J. Strong dihydrogen bonds – ab initio and atoms in molecules study. Chem Phys Lett 2004. [DOI: 10.1016/j.cplett.2004.01.013] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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69
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Grabowski SJ, Pfitzner A, Zabel M, Dubis AT, Palusiak M. Intramolecular H···H Interactions for the Crystal Structures of [4-((E)-But-1-enyl)-2,6-dimethoxyphenyl]pyridine-3-carboxylate and [4-((E)-Pent-1-enyl)-2,6-dimethoxyphenyl]pyridine-3-carboxylate; DFT Calculations on Modeled Styrene Derivatives. J Phys Chem B 2004. [DOI: 10.1021/jp0351829] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sławomir J. Grabowski
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Institut für Anorganische Chemie der Universität Regensburg, 93040 Regensburg, Germany, and Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland
| | - Arno Pfitzner
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Institut für Anorganische Chemie der Universität Regensburg, 93040 Regensburg, Germany, and Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland
| | - Manfred Zabel
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Institut für Anorganische Chemie der Universität Regensburg, 93040 Regensburg, Germany, and Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland
| | - Alina T. Dubis
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Institut für Anorganische Chemie der Universität Regensburg, 93040 Regensburg, Germany, and Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland
| | - Marcin Palusiak
- Department of Crystallography and Crystal Chemistry, University of Łódź, 90-236 Łódź, ul. Pomorska 149/153, Poland, Institut für Anorganische Chemie der Universität Regensburg, 93040 Regensburg, Germany, and Institute of Chemistry, University of Białystok, Al. J. Piłsudskiego 11/4, 15-443 Białystok, Poland
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70
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Aydeniz Y, Oguz F, Yaman A, Konuklar AS, Dogan I, Aviyente V, Klein RA. Barriers to internal rotation around the C–N bond in 3-(o-aryl)-5-methyl-rhodanines using NMR spectroscopy and computational studies. Electron density topological analysis of the transition states. Org Biomol Chem 2004; 2:2426-36. [PMID: 15326522 DOI: 10.1039/b406556e] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have investigated the pairs of rotational isomers for six 3-(o-aryl)-5-methyl-rhodanines (Z = H, F, Cl, Br, OH, and CH3) using NMR spectroscopy and density functional theory (DFT) calculations. Electron density topological and NBO analysis has demonstrated the importance of non-covalent interactions, characterised by (3, -1) bond critical points (BCPs), between the oxygen and sulfur atoms on the thiazolidine ring with the aryl substitutents in stabilizing the transition states. The energetic activation barriers to rotation have also been determined using computational results; rotational barriers for 3-(o-chlorophenyl)-5-methyl-rhodanine (3S) and 3-(o-tolyl)-5-methyl-rhodanine (6S) were determined experimentally based on NMR separation of the diastereoisomeric pairs, and the first-order rate constants used to derive the value of the rotational barrier from the Eyring equation.
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Affiliation(s)
- Yeliz Aydeniz
- Department of Chemistry, Bogazici University, Bebek, Istanbul, Turkey
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71
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Cybulski H, Pecul M, Sadlej J, Helgaker T. Characterization of dihydrogen-bonded D–H⋯H–A complexes on the basis of infrared and magnetic resonance spectroscopic parameters. J Chem Phys 2003. [DOI: 10.1063/1.1597633] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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72
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Custelcean R, Dreger ZA. Dihydrogen Bonding under High Pressure: A Raman Study of BH3NH3Molecular Crystal. J Phys Chem B 2003. [DOI: 10.1021/jp035267+] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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73
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Kryachko ES, Zeegers-Huyskens T. Theoretical Study of the CH4·(H2O)2 and CH4. H5O2+ Complexes. Three-Hydrogen-Atoms Interaction. J Phys Chem A 2003. [DOI: 10.1021/jp022498s] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eugene S. Kryachko
- Department of Chemistry, University of Leuven, 200F Celestijnenlaan, B-3001 Leuven, Belgium
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74
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Belkova NV, Besora M, Epstein LM, Lledós A, Maseras F, Shubina ES. Influence of media and homoconjugate pairing on transition metal hydride protonation. An IR and DFT study on proton transfer to CpRuH(CO)(PCy3). J Am Chem Soc 2003; 125:7715-25. [PMID: 12812513 DOI: 10.1021/ja029712a] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The interaction of the ruthenium hydride complex CpRuH(CO)(PCy(3)) (1) with proton donors HOR of different strength was studied in hexane and compared with data in dichloromethane. The formation of dihydrogen-bonded complexes (2) and ion pairs stabilized by hydrogen bonds between the dihydrogen ligand and the anion (3) was observed. Kinetics of the interconversion from 2 to 3 was followed at different (CF(3))(3)COH concentrations between 200 and 240 K. The activation enthalpy and entropy values for proton transfer from the dihydrogen-bonded complex 2 to the (eta(2)-H(2))-complex 3 (DeltaH() = 11.0 +/- 0.5 kcal/mol and DeltaS() = -19 +/- 3 eu) were obtained for the first time. The results of the DFT study of the proton transfer process, taking CF(3)COOH and (CF(3))(3)COH as a proton donors and introducing solvent effects in the calculation with the PCM method, are presented. The role of homoconjugate pairs [ROHOR](-) in the protonation is analyzed by means of the inclusion of an additional ROH molecule in the calculations. The formation of the free cationic complex [CpRu(CO)(PCy(3))(eta(2)-H(2))](+) is driven by the formation of the homoconjugated anionic complex [ROHOR](-). Solvent polarity plays a significant role stabilizing the charged species formed in the process. The theoretical study also accounts for the dihydrogen release and production of CpRu(OR)(CO)(PCy(3)), observed at temperatures above 250 K.
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Affiliation(s)
- Natalia V Belkova
- A. N. Nesmeyanov Institute of Organoelement Compounds, 28 Vavilov Street, 119991 Moscow, Russia
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75
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Robertson KN, Knop O, Cameron TS. C-H···H-C interactions in organoammonium tetraphenylborates: another look at dihydrogen bonds. CAN J CHEM 2003. [DOI: 10.1139/v03-080] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The crystal structures of the tetraphenylborates of the dabcoH+, guanidinium (MeCN solvate), and biguanidinium cations are shown to contain a variety of C-H···H-C dihydrogen (DB) bonds of nominally zero polarity, as well as a variety of N-H···N, C-H···N, N-H···Ph, and C-H···Ph hydrogen (HB) bonds. These intermolecular bonds have been characterized topologically after multipole refinement of the structures. The coexistence of the DBs and HBs in each of the structures makes it possible to establish their relative strength hierarchy. It also illustrates the importance of the DBs in satisfying the tendency of these structures to maximize the total intermolecular bonding engagement. To compare the above DBs with other DBs, the results of an extensive set of MP2/6-31G(d,p) calculations (supplied by I. Alkorta) were analyzed for reference correlations between the bond-critical parameters. Thus, for an X-H···H-Y bond, the difference Δε(H)m between the Mulliken charges on the H atoms in the uncomplexed X-H and H-Y components correlates quite well with the X-H···H-Y parameters and can be used for predicting the topological strength of an X-H···H-Y bond. The use of the difference Δε(H)c in the bond does not appear to change the correlation significantly; closer correlations are observed when the amount of charge transferred on formation of the H···H bond is used instead of Δε(H)m or Δε(H)c. Bonding interactions are obtained even between like or symmetry-related H atoms as a consequence of induced-dipole interactions, which accounts for the existence of the above intermolecular C-H···H-C bonds with d(H···H) = 2.182.57 Å, electron density at the bond-critical point of ~0.050.08 e/Å3, and a rough estimate of the H···H binding energy of ~1-5 kcal/mol. Examination of the bond-critical parameters of X-H···H-Y bonds also suggests a criterion of stability of these bonds with respect to the transition from non-shared (closed-shell) X-H···H-Y interaction to covalent (shared-shell) X···H-H···Y interaction. This transition appears to be discontinuous.Key words: bond-critical parameters, bond topology, dihydrogen bonds, hydrogen bonds, organoammonium tetraphenylborates.
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76
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Trudel S, Gilson DFR. High-pressure Raman spectroscopic study of the ammonia-borane complex. Evidence for the dihydrogen bond. Inorg Chem 2003; 42:2814-6. [PMID: 12691593 DOI: 10.1021/ic026275s] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Raman spectra of the ammonia-borane complex, NH(3)BH(3), have been investigated as a function of pressure up to 40 kbar. Vibrational modes involving the NH(3) group show negative pressure dependences, supporting the existence of the dihydrogen bond, but the vibrations of the BH(3) group have a positive dependence. Two transitions were observed in the solid phase under pressure, in contrast to the temperature behavior, where a single transition occurs. Factor group splitting occurs for the degenerate vibrations, and this allows the correct assignment of the observed vibrations.
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Affiliation(s)
- Simon Trudel
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, H3A 2K6 Canada
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Del Bene JE, Perera SA, Bartlett RJ, Alkorta I, Elguero J, Mó O, Yáñez M. One-Bond (1dJH-H) and Three-Bond (3dJX-M) Spin−Spin Coupling Constants Across X−H···H−M Dihydrogen Bonds. J Phys Chem A 2002. [DOI: 10.1021/jp021160v] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Janet E. Del Bene
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - S. Ajith Perera
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - Rodney J. Bartlett
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - Ibon Alkorta
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - José Elguero
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - Otilia Mó
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
| | - Manuel Yáñez
- Quantum Theory Project, University of Florida, Gainesville, Florida 32611, Department of Chemistry, Youngstown State University, Youngstown, Ohio 44555, Instituto de Química, Médica, CSIC, Juan de la Cierva, 3, 28006-Madrid, Spain, and Departmento de Química, C-9, Universidad Autónoma de Madrid, Cantoblanco, 28049-Madrid, Spain
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