101
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de Lange JH, Cukrowski I. Toward deformation densities for intramolecular interactions without radical reference states using the fragment, atom, localized, delocalized, and interatomic (FALDI) charge density decomposition scheme. J Comput Chem 2017; 38:981-997. [DOI: 10.1002/jcc.24772] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 01/09/2017] [Accepted: 02/02/2017] [Indexed: 01/30/2023]
Affiliation(s)
- Jurgens Hendrik de Lange
- Department of Chemistry, Faculty of Natural and Agricultural Sciences; University of Pretoria; Lynnwood Road Hatfield Pretoria 0002 South Africa
| | - Ignacy Cukrowski
- Department of Chemistry, Faculty of Natural and Agricultural Sciences; University of Pretoria; Lynnwood Road Hatfield Pretoria 0002 South Africa
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102
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Grabowski SJ. Hydrogen bonds, and σ-hole and π-hole bonds – mechanisms protecting doublet and octet electron structures. Phys Chem Chem Phys 2017; 19:29742-29759. [DOI: 10.1039/c7cp06393h] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
For various interactions electron charge shifts try to protect the former doublet or octet electronic structure of the Lewis acid centre.
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Affiliation(s)
- Sławomir J. Grabowski
- Faculty of Chemistry
- University of the Basque Country and Donostia International Physics Center (DIPC)
- P.K. 1072 20080 Donostia
- Spain
- IKERBASQUE
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103
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Paskevicius M, Jepsen LH, Schouwink P, Černý R, Ravnsbæk DB, Filinchuk Y, Dornheim M, Besenbacher F, Jensen TR. Metal borohydrides and derivatives – synthesis, structure and properties. Chem Soc Rev 2017; 46:1565-1634. [DOI: 10.1039/c6cs00705h] [Citation(s) in RCA: 262] [Impact Index Per Article: 37.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A comprehensive review of metal borohydrides from synthesis to application.
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Affiliation(s)
- Mark Paskevicius
- Center for Materials Crystallography
- Interdisciplinary Nanoscience Center (iNANO), and Department of Chemistry
- Aarhus University
- DK-8000 Aarhus C
- Denmark
| | - Lars H. Jepsen
- Center for Materials Crystallography
- Interdisciplinary Nanoscience Center (iNANO), and Department of Chemistry
- Aarhus University
- DK-8000 Aarhus C
- Denmark
| | - Pascal Schouwink
- Laboratory of Crystallography
- DQMP
- University of Geneva
- 1211 Geneva
- Switzerland
| | - Radovan Černý
- Laboratory of Crystallography
- DQMP
- University of Geneva
- 1211 Geneva
- Switzerland
| | - Dorthe B. Ravnsbæk
- Department of Physics
- Chemistry and Pharmacy
- University of Southern Denmark
- 5230 Odense M
- Denmark
| | - Yaroslav Filinchuk
- Institute of Condensed Matter and Nanosciences
- Université catholique de Louvain
- B-1348 Louvain-la-Neuve
- Belgium
| | - Martin Dornheim
- Helmholtz-Zentrum Geesthacht
- Department of Nanotechnology
- 21502 Geesthacht
- Germany
| | - Flemming Besenbacher
- Interdisciplinary Nanoscience Center (iNANO) and Department of Physics and Astronomy
- DK-8000 Aarhus C
- Denmark
| | - Torben R. Jensen
- Center for Materials Crystallography
- Interdisciplinary Nanoscience Center (iNANO), and Department of Chemistry
- Aarhus University
- DK-8000 Aarhus C
- Denmark
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104
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Fanfrlík J, Pecina A, Řezáč J, Sedlak R, Hnyk D, Lepšík M, Hobza P. B–H⋯π: a nonclassical hydrogen bond or dispersion contact? Phys Chem Chem Phys 2017; 19:18194-18200. [DOI: 10.1039/c7cp02762a] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantum mechanical calculations disprove the attractive electrostatic nature of B–H⋯π motif and define it as dispersion-driven contact.
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Affiliation(s)
- Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
- 166 10 Prague 6
- Czech Republic
| | - Adam Pecina
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
- 166 10 Prague 6
- Czech Republic
| | - Jan Řezáč
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
- 166 10 Prague 6
- Czech Republic
| | - Robert Sedlak
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
- 166 10 Prague 6
- Czech Republic
| | - Drahomír Hnyk
- Institute of Inorganic Chemistry of the Czech Academy of Sciences
- v.v.i., 250 68 Husinec-Řež
- Czech Republic
| | - Martin Lepšík
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
- 166 10 Prague 6
- Czech Republic
| | - Pavel Hobza
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
- 166 10 Prague 6
- Czech Republic
- Regional Center of Advanced Technologies and Materials
- Department of Physical Chemistry
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105
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Echeverría J, Aullón G, Alvarez S. Dihydrogen intermolecular contacts in group 13 compounds: H⋯H or E⋯H (E = B, Al, Ga) interactions? Dalton Trans 2017; 46:2844-2854. [DOI: 10.1039/c6dt02854c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A theoretical analysis rationalises the energetics and topology of B–H⋯H–B and B–H⋯B short contacts present in the crystal structures of many borane derivatives.
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Affiliation(s)
- Jorge Echeverría
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Gabriel Aullón
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Santiago Alvarez
- Departament de Química Inorgànica i Orgànica and Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
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106
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Rinne BL, Lathem AP, Heiden ZM. Influence of intramolecular vs. intermolecular phosphonium-borohydrides in catalytic hydrogen, hydride, and proton transfer reactions. Dalton Trans 2017; 46:9382-9393. [DOI: 10.1039/c7dt01693j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermodynamics of hydrogen, hydride, and proton transfer from 22 intramolecular and intermolecular phosphonium-borohydrides to eight substrates are described.
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Affiliation(s)
| | - A. Paige Lathem
- Department of Chemistry
- Washington State University
- Pullman
- USA
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107
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Ge H, Jing Y, Yang X. Computational Design of Cobalt Catalysts for Hydrogenation of Carbon Dioxide and Dehydrogenation of Formic Acid. Inorg Chem 2016; 55:12179-12184. [DOI: 10.1021/acs.inorgchem.6b01723] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hongyu Ge
- Beijing National Laboratory for Molecular Sciences, State
Key Laboratory for Structural Chemistry of Unstable and Stable Species,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Yuanyuan Jing
- Beijing National Laboratory for Molecular Sciences, State
Key Laboratory for Structural Chemistry of Unstable and Stable Species,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Xinzheng Yang
- Beijing National Laboratory for Molecular Sciences, State
Key Laboratory for Structural Chemistry of Unstable and Stable Species,
Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
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108
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Lü R, Wu C, Lin J, Xiao Y, Wang F, Lu Y. The study on interactions between 1-ethyl-3-methylimidazolium chloride and benzene/pyridine /pyrrole/thiophene. J PHYS ORG CHEM 2016. [DOI: 10.1002/poc.3663] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Renqing Lü
- College of Science, China University of Petroleum (East China); Qingdao Shandong Province China
| | - Chongchong Wu
- Department of Chemical and Petroleum Engineering; University of Calgary; Calgary Alberta Canada
| | - Jin Lin
- College of Chemical Engineering; China University of Petroleum (East China); Qingdao Shandong Province China
| | - Ye Xiao
- Department of Chemical and Petroleum Engineering; University of Calgary; Calgary Alberta Canada
| | - Fang Wang
- College of Science, China University of Petroleum (East China); Qingdao Shandong Province China
| | - Yukun Lu
- College of Science, China University of Petroleum (East China); Qingdao Shandong Province China
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109
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Alberico E, Lennox AJJ, Vogt LK, Jiao H, Baumann W, Drexler HJ, Nielsen M, Spannenberg A, Checinski MP, Junge H, Beller M. Unravelling the Mechanism of Basic Aqueous Methanol Dehydrogenation Catalyzed by Ru-PNP Pincer Complexes. J Am Chem Soc 2016; 138:14890-14904. [PMID: 27759392 DOI: 10.1021/jacs.6b05692] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Ruthenium PNP complex 1a (RuH(CO)Cl(HN(C2H4Pi-Pr2)2)) represents a state-of-the-art catalyst for low-temperature (<100 °C) aqueous methanol dehydrogenation to H2 and CO2. Herein, we describe an investigation that combines experiment, spectroscopy, and theory to provide a mechanistic rationale for this process. During catalysis, the presence of two anionic resting states was revealed, Ru-dihydride (3-) and Ru-monohydride (4-) that are deprotonated at nitrogen in the pincer ligand backbone. DFT calculations showed that O- and CH- coordination modes of methoxide to ruthenium compete, and form complexes 4- and 3-, respectively. Not only does the reaction rate increase with increasing KOH, but the ratio of 3-/4- increases, demonstrating that the "inner-sphere" C-H cleavage, via C-H coordination of methoxide to Ru, is promoted by base. Protonation of 3- liberates H2 gas and formaldehyde, the latter of which is rapidly consumed by KOH to give the corresponding gem-diolate and provides the overall driving force for the reaction. Full MeOH reforming is achieved through the corresponding steps that start from the gem-diolate and formate. Theoretical studies into the mechanism of the catalyst Me-1a (N-methylated 1a) revealed that C-H coordination to Ru sets-up C-H cleavage and hydride delivery; a process that is also promoted by base, as observed experimentally. However, in this case, Ru-dihydride Me-3 is much more stable to protonation and can even be observed under neutral conditions. The greater stability of Me-3 rationalizes the lower rates of Me-1a compared to 1a, and also explains why the reaction rate then drops with increasing KOH concentration.
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Affiliation(s)
- Elisabetta Alberico
- Leibniz Institute for Catalysis, University of Rostock , Albert Einstein-Straße 29a, 18059 Rostock, Germany.,Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche , tr. La Crucca 3, 07100 Sassari, Italy
| | - Alastair J J Lennox
- Leibniz Institute for Catalysis, University of Rostock , Albert Einstein-Straße 29a, 18059 Rostock, Germany
| | - Lydia K Vogt
- Leibniz Institute for Catalysis, University of Rostock , Albert Einstein-Straße 29a, 18059 Rostock, Germany
| | - Haijun Jiao
- Leibniz Institute for Catalysis, University of Rostock , Albert Einstein-Straße 29a, 18059 Rostock, Germany
| | - Wolfgang Baumann
- Leibniz Institute for Catalysis, University of Rostock , Albert Einstein-Straße 29a, 18059 Rostock, Germany
| | - Hans-Joachim Drexler
- Leibniz Institute for Catalysis, University of Rostock , Albert Einstein-Straße 29a, 18059 Rostock, Germany
| | - Martin Nielsen
- Centre for Catalysis and Sustainable Chemistry, Department of Chemistry, Technical University of Denmark , Kemitorvet 207, 2800 Kgs. Lyngby, Denmark
| | - Anke Spannenberg
- Leibniz Institute for Catalysis, University of Rostock , Albert Einstein-Straße 29a, 18059 Rostock, Germany
| | | | - Henrik Junge
- Leibniz Institute for Catalysis, University of Rostock , Albert Einstein-Straße 29a, 18059 Rostock, Germany
| | - Matthias Beller
- Leibniz Institute for Catalysis, University of Rostock , Albert Einstein-Straße 29a, 18059 Rostock, Germany
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110
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Cukrowski I, Sagan F, Mitoraj MP. On the Stability of Cis- and Trans-2-Butene Isomers. An Insight Based on the FAMSEC, IQA, and ETS-NOCV Schemes. J Comput Chem 2016; 37:2783-2798. [PMID: 27730662 DOI: 10.1002/jcc.24504] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 09/08/2016] [Accepted: 09/10/2016] [Indexed: 01/19/2023]
Abstract
In the present account, the real space fragment attributed molecular system energy change (FAMSEC) approach, interacting quantum atoms energy decomposition scheme as well as molecular orbitals based the extended transition state scheme coupled with natural orbitals for chemical valence (ETS-NOCV) have been, for the first time, successfully used to delineate factors of importance for stability of the 2-butene conformers (cis-eq, cis-TS, trans-eq, trans-TS). Our results demonstrate that atoms of the controversial H-H contact in cis-eq (i) are involved in attractive interaction dominated by the exchange-correlation term, (ii) are weekly stabilized, (iii) show trends in several descriptors found in other typical H-bonds, and (iv) are part of most stabilized CH-HC fragment (loc-FAMSEC = -3.6 kcal/mol) with most favourably changed intrafragment interactions on trans-eq→cis-eq. Moreover, lower stability of cis-eq vs. trans-eq is linked with the entire HCCH (ethylenic) fragment which destabilized cis-eq (mol-FAMSEC, +3.9 kcal/mol) the most. Although the H-H contact can be linked with smaller, relative to trans-, rotational energy barrier in cis-2-butene, we have proven that to rationalize this phenomenon one must account for changes in interactions between various fragments that constitute the entire molecule. Importantly, we discovered a number of comparable trends in fundamental properties of equivalent molecular fragments on a methyl group rotation; for example, interaction between BP-free H-atoms in trans-eq (involving CH bonds of the methyl and ethylenic units) and BP-linked H-atoms in cis-eq. Clearly, rotational energy barrier cannot be entirely (i) rationalized by the properties of or (ii) attributed to the H-H contact in cis-eq. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Ignacy Cukrowski
- Department of Chemistry, Faculty of Natural and Agricultural Sciences, University of Pretoria, Lynnwood Road, Pretoria, 0002, South Africa
| | - Filip Sagan
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, R. Ingardena 3, Cracow, 30-060, Poland
| | - Mariusz Paweł Mitoraj
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, R. Ingardena 3, Cracow, 30-060, Poland
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111
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Secondary interactions in decachloro-closo-decaborates of alkali metals M2[B10Cl10] (M = K+ and Cs+): 35Cl NQR and X-ray studies. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.06.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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112
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113
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Pairas GN, Tsoungas PG. H-Bond: Τhe Chemistry-Biology H-Bridge. ChemistrySelect 2016; 1:4520-4532. [PMID: 32328512 PMCID: PMC7169486 DOI: 10.1002/slct.201600770] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2016] [Accepted: 07/29/2016] [Indexed: 12/19/2022]
Abstract
H-bonding, as a non covalent stabilizing interaction of diverse nature, has a central role in the structure, function and dynamics of chemical and biological processes, pivotal to molecular recognition and eventually to drug design. Types of conventional and non conventional (H-H, dihydrogen, H- π, CH- π, anti- , proton coordination and H-S) H-bonding interactions are discussed as well as features emerging from their interplay, such as cooperativity (σ- and π-) effects and allostery. Its utility in many applications is described. Catalysis, proton and electron transfer processes in various materials or supramolecular architectures of preorganized hosts for guest binding, are front-line technology. The H-bond-related concept of proton transfer (PT) addresses energy issues or deciphering the mechanism of many natural and synthetic processes. PT is also of paramount importance in the functions of cells and is assisted by large complex proteins embedded in membranes. Both intermolecular and intramolecular PT in H-bonded systems has received attention, theoretically and experimentally, using prototype molecules. It is found in rearrangement reactions, protein functions, and enzyme reactions or across proton channels and pumps. Investigations on the competition between intra- and intermolecular H bonding are discussed. Of particular interest is the H-bond furcation, a common phenomenon in protein-ligand binding. Multiple H-bonding (H-bond furcation) is observed in supramolecular structures.
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Affiliation(s)
- George N. Pairas
- Department of PharmacyLaboratory of Medicinal ChemistryUniversity of PatrasGR-265 04PatrasGreece
| | - Petros G. Tsoungas
- Laboratory of BiochemistryHellenic Pasteur Institute127 Vas. Sofias Ave.GR-115 21AthensGreece
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114
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Maier AFG, Tussing S, Schneider T, Flörke U, Qu ZW, Grimme S, Paradies J. Dehydrierende Oxidation von Indolinen und anderen Heterocyclen durch frustrierte Lewis-Paare. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606426] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexander F. G. Maier
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Sebastian Tussing
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Tobias Schneider
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Ulrich Flörke
- Institut für Anorganische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry; Institut für Physikalische und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Deutschland
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry; Institut für Physikalische und Theoretische Chemie; Universität Bonn; Beringstraße 4 53115 Bonn Deutschland
| | - Jan Paradies
- Institut für Organische Chemie; Universität Paderborn; Warburger Straße 100 33098 Paderborn Deutschland
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115
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Maier AFG, Tussing S, Schneider T, Flörke U, Qu ZW, Grimme S, Paradies J. Frustrated Lewis Pair Catalyzed Dehydrogenative Oxidation of Indolines and Other Heterocycles. Angew Chem Int Ed Engl 2016; 55:12219-23. [PMID: 27594431 DOI: 10.1002/anie.201606426] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 08/02/2016] [Indexed: 11/11/2022]
Abstract
An acceptorless dehydrogenation of heterocycles catalyzed by frustrated Lewis pairs (FLPs) was developed. Oxidation with concomitant liberation of molecular hydrogen proceeded in high to excellent yields for N-protected indolines as well as four other substrate classes. The mechanism of this unprecedented FLP-catalyzed reaction was investigated by mechanistic studies, characterization of reaction intermediates by NMR spectroscopy and X-ray crystal analysis, and by quantum-mechanical calculations. Hydrogen liberation from the ammonium hydridoborate intermediate is the rate-determining step of the oxidation. The addition of a weaker Lewis acid as a hydride shuttle increased the reaction rate by a factor of 2.28 through a second catalytic cycle.
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Affiliation(s)
- Alexander F G Maier
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Sebastian Tussing
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Tobias Schneider
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Ulrich Flörke
- Institute of Inorganic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, University of Bonn, Beringstrasse 4, 53115, Bonn, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische und Theoretische Chemie, University of Bonn, Beringstrasse 4, 53115, Bonn, Germany.
| | - Jan Paradies
- Institute of Organic Chemistry, University of Paderborn, Warburger Strasse 100, 33098, Paderborn, Germany.
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116
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Avdeeva V, Polyakova I, Goeva L, Buzanov G, Malinina E, Kuznetsov N. Synthesis and structure of [NiL6][B10H10] (L = DMF or DMSO) as precursors for solid-phase synthesis of nickel(II) coordination compounds. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.07.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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117
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Esrafili MD, Amiri Z, Shankal F. Strong cooperative effects between π-hole and dihydrogen bonds interactions: a computational study. Mol Phys 2016. [DOI: 10.1080/00268976.2016.1203037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Mehdi D. Esrafili
- Department of Chemistry, Laboratory of Theoretical Chemistry, University of Maragheh, Maragheh, Iran
| | - Zakiyeh Amiri
- Department of Chemistry, Laboratory of Theoretical Chemistry, University of Maragheh, Maragheh, Iran
| | - Fatemeh Shankal
- Department of Chemistry, Laboratory of Theoretical Chemistry, University of Maragheh, Maragheh, Iran
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118
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Balakrishna B, Bauzá A, Frontera A, Vidal-Ferran A. Asymmetric Hydrogenation of Seven-Membered C=N-containing Heterocycles and Rationalization of the Enantioselectivity. Chemistry 2016; 22:10607-13. [DOI: 10.1002/chem.201601464] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Indexed: 02/04/2023]
Affiliation(s)
- Bugga Balakrishna
- Institute of Chemical Research of Catalonia (ICIQ); Avinguda Països Catalans 16 43007 Tarragona Spain
- The Barcelona Institute of Science and Technology; Avinguda Països Catalans 16 43007 Tarragona Spain
| | - Antonio Bauzá
- Departament de Química; Universitat de les Illes Balears (UIB); Cra. de Valldemossa, km 7.5. Palma 07122 Palma de Mallorca Spain
| | - Antonio Frontera
- Departament de Química; Universitat de les Illes Balears (UIB); Cra. de Valldemossa, km 7.5. Palma 07122 Palma de Mallorca Spain
| | - Anton Vidal-Ferran
- Institute of Chemical Research of Catalonia (ICIQ); Avinguda Països Catalans 16 43007 Tarragona Spain
- ICREA; Pg. Lluís Companys 23 08010 Barcelona Spain
- The Barcelona Institute of Science and Technology; Avinguda Països Catalans 16 43007 Tarragona Spain
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119
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Karunananda MK, Mankad NP. Heterobimetallic H2 Addition and Alkene/Alkane Elimination Reactions Related to the Mechanism of E-Selective Alkyne Semihydrogenation. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00356] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Malkanthi K. Karunananda
- Department
of Chemistry, University of Illinois at Chicago, 845 W. Taylor
Street, Chicago, Illinois 60607, United States
| | - Neal P. Mankad
- Department
of Chemistry, University of Illinois at Chicago, 845 W. Taylor
Street, Chicago, Illinois 60607, United States
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120
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Belkova NV, Epstein LM, Filippov OA, Shubina ES. Hydrogen and Dihydrogen Bonds in the Reactions of Metal Hydrides. Chem Rev 2016; 116:8545-87. [PMID: 27285818 DOI: 10.1021/acs.chemrev.6b00091] [Citation(s) in RCA: 148] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The dihydrogen bond-an interaction between a transition-metal or main-group hydride (M-H) and a protic hydrogen moiety (H-X)-is arguably the most intriguing type of hydrogen bond. It was discovered in the mid-1990s and has been intensively explored since then. Herein, we collate up-to-date experimental and computational studies of the structural, energetic, and spectroscopic parameters and natures of dihydrogen-bonded complexes of the form M-H···H-X, as such species are now known for a wide variety of hydrido compounds. Being a weak interaction, dihydrogen bonding entails the lengthening of the participating bonds as well as their polarization (repolarization) as a result of electron density redistribution. Thus, the formation of a dihydrogen bond allows for the activation of both the MH and XH bonds in one step, facilitating proton transfer and preparing these bonds for further transformations. The implications of dihydrogen bonding in different stoichiometric and catalytic reactions, such as hydrogen exchange, alcoholysis and aminolysis, hydrogen evolution, hydrogenation, and dehydrogenation, are discussed.
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Affiliation(s)
- Natalia V Belkova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , Vavilov Street 28, 119991 Moscow, Russia
| | - Lina M Epstein
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , Vavilov Street 28, 119991 Moscow, Russia
| | - Oleg A Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , Vavilov Street 28, 119991 Moscow, Russia
| | - Elena S Shubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , Vavilov Street 28, 119991 Moscow, Russia
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121
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Esteruelas MA, López AM, Oliván M. Polyhydrides of Platinum Group Metals: Nonclassical Interactions and σ-Bond Activation Reactions. Chem Rev 2016; 116:8770-847. [DOI: 10.1021/acs.chemrev.6b00080] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Miguel A. Esteruelas
- Departamento de
Química
Inorgánica, Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Centro de Innovación
en Química Avanzada (ORFEO−CINQA), Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - Ana M. López
- Departamento de
Química
Inorgánica, Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Centro de Innovación
en Química Avanzada (ORFEO−CINQA), Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - Montserrat Oliván
- Departamento de
Química
Inorgánica, Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Centro de Innovación
en Química Avanzada (ORFEO−CINQA), Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
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122
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Leśnikowski ZJ. Challenges and Opportunities for the Application of Boron Clusters in Drug Design. J Med Chem 2016; 59:7738-58. [PMID: 27124656 DOI: 10.1021/acs.jmedchem.5b01932] [Citation(s) in RCA: 233] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
There are two branches in boron medicinal chemistry: the first focuses on single boron atom compounds, and the second utilizes boron clusters. Boron clusters and their heteroatom counterparts belong to the family of cage compounds. A subset of this extensive class of compounds includes dicarbadodecaboranes, which have the general formula C2B10H12, and their metal biscarboranyl complexes, metallacarboranes, with the formula [M(C2B10H12)2(-2)]. The unique properties of boron clusters have resulted in their utilization in applications such as in pharmacophores, as scaffolds in molecular construction, and as modulators of bioactive compounds. This Perspective presents an overview of the properties of boron clusters that are pertinent for drug discovery, recent applications in the design of various classes of drugs, and the potential use of boron clusters in the construction of new pharmaceuticals.
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Affiliation(s)
- Zbigniew J Leśnikowski
- Institute of Medical Biology, Polish Academy of Sciences , Laboratory of Molecular Virology and Biological Chemistry, 106 Lodowa St., Lodz 93-232, Poland
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123
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Maity A, Teets TS. Main Group Lewis Acid-Mediated Transformations of Transition-Metal Hydride Complexes. Chem Rev 2016; 116:8873-911. [DOI: 10.1021/acs.chemrev.6b00034] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ayan Maity
- Department of Chemistry, University of Houston, Lamar Fleming Jr. Building, 3585 Cullen Boulevard,
Room 112, Houston, Texas 77204-5003, United States
| | - Thomas S. Teets
- Department of Chemistry, University of Houston, Lamar Fleming Jr. Building, 3585 Cullen Boulevard,
Room 112, Houston, Texas 77204-5003, United States
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124
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Grabowski SJ, Ruipérez F. Dihydrogen bond interactions as a result of H2 cleavage at Cu, Ag and Au centres. Phys Chem Chem Phys 2016; 18:12810-8. [PMID: 27101741 DOI: 10.1039/c6cp00046k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A quantum chemical study of H2 activation at fluorides of coinage metals, MF (M = Cu, Ag and Au), and its splitting was performed. The following reaction path was analyzed: FMH2→ FHHM → HMFH, where both the molecular complexes and the corresponding transition states have been characterized at the CCSD(T)/aug-cc-pVQZ//MP2/aug-cc-pVQZ level of theory. Further single-point CASSCF/CASPT2 calculations, including spin-orbit coupling effects, were also performed to analyze the role of non-dynamic correlation. The scalar relativistic effects are included via aug-cc-pVQZ-PP basis sets used for the metals. The dihydrogen-bonded copper (FHHCu) and silver (FHHAg) complexes are observed as a result of H2 cleavage, while the corresponding FHHAu gold complex is not found but the HAuHF arrangement is observed, instead. The energetic and geometrical parameters of the complexes have been analyzed and both the Quantum Theory of Atoms in Molecules approach and the Natural Bond Orbitals method were additionally applied to analyze the intermolecular interactions.
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Affiliation(s)
- Sławomir J Grabowski
- Faculty of Chemistry, University of the Basque Country and Donostia International Physics Center (DIPC), P.K. 1072, 20080 Donostia-San Sebastián, Spain
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125
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Ji M, Dong C, Yang X. Density functional theory prediction of cobalt pincer complexes for catalytic dehydrogenation of ethanol. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1157178] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Mingsong Ji
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Chunhua Dong
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, People’s Republic of China
- School of Chemistry, Chemical Engineering and Material, Handan Key Laboratory of Organic Small Molecule Materials, Handan College, Handan, People’s Republic of China
| | - Xinzheng Yang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing, People’s Republic of China
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126
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Non-Covalent Interactions in Hydrogen Storage Materials LiN(CH3)2BH3 and KN(CH3)2BH3. CRYSTALS 2016. [DOI: 10.3390/cryst6030028] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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127
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Chen X, Yang X. Bioinspired Design and Computational Prediction of Iron Complexes with Pendant Amines for the Production of Methanol from CO2 and H2. J Phys Chem Lett 2016; 7:1035-1041. [PMID: 26937854 DOI: 10.1021/acs.jpclett.6b00161] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Inspired by the active site structure of [FeFe]-hydrogenase, we built a series of iron dicarbonyl diphosphine complexes with pendant amines and predicted their potentials to catalyze the hydrogenation of CO2 to methanol using density functional theory. Among the proposed iron complexes, [(P(tBu)2N(tBu)2H)FeH(CO)2(COOH)](+) (5COOH) is the most active one with a total free energy barrier of 23.7 kcal/mol. Such a low barrier indicates that 5COOH is a very promising low-cost catalyst for high-efficiency conversion of CO2 and H2 to methanol under mild conditions. For comparison, we also examined Bullock's Cp iron diphosphine complex with pendant amines, [(P(tBu)2N(tBu)2H)FeHCp(C5F4N)](+) (5Cp-C5F4N), as a catalyst for hydrogenation of CO2 to methanol and obtained a total free energy barrier of 27.6 kcal/mol, which indicates that 5Cp-C5F4N could also catalyze the conversion of CO2 and H2 to methanol but has a much lower efficiency than our newly designed iron complexes.
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Affiliation(s)
- Xiangyang Chen
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Repubic of China
- University of Chinese Academy of Sciences , Beijing 100049, People's Repubic of China
| | - Xinzheng Yang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, People's Repubic of China
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128
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Affiliation(s)
- Robert H. Crabtree
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06520-8107, United States
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129
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Bauzá A, Frontera A. Theoretical study on σ- and π-hole carbon⋯carbon bonding interactions: implications in CFC chemistry. Phys Chem Chem Phys 2016; 18:32155-32159. [DOI: 10.1039/c6cp06449c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this manuscript the ability of CO2 and several CFCs to establish noncovalent carbon⋯carbon interactions with atmospheric gases CO, ethene and ethyne has been studied at the RI-MP2/def2-TZVPD level of theory.
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Affiliation(s)
- Antonio Bauzá
- Department of Chemistry Universitat de les Illes Balears
- 07122 Palma
- Spain
| | - Antonio Frontera
- Department of Chemistry Universitat de les Illes Balears
- 07122 Palma
- Spain
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130
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Safin DA, Robeyns K, Garcia Y. 1,2,4-Triazole-based molecular switches: crystal structures, Hirshfeld surface analysis and optical properties. CrystEngComm 2016. [DOI: 10.1039/c6ce00749j] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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131
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Safin DA, Babashkina MG, Robeyns K, Garcia Y. C–H⋯Br–C vs. C–Br⋯Br–C vs. C–Br⋯N bonding in molecular self-assembly of pyridine-containing dyes. RSC Adv 2016. [DOI: 10.1039/c6ra10094e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We have studied N-(5-bromosalicylidene)-x-aminopyridine dyes (x = 2, 1; 3, 2; 4, 3) by means of single crystal X-ray diffraction and Hirshfeld surface analysis. Their optical properties were also examined and correlated with structural findings.
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Affiliation(s)
- Damir A. Safin
- Institute of Condensed Matter and Nanosciences
- Molecules, Solids and Reactivity (IMCN/MOST)
- Université Catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
| | - Maria G. Babashkina
- Institute of Condensed Matter and Nanosciences
- Molecules, Solids and Reactivity (IMCN/MOST)
- Université Catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
| | - Koen Robeyns
- Institute of Condensed Matter and Nanosciences
- Molecules, Solids and Reactivity (IMCN/MOST)
- Université Catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
| | - Yann Garcia
- Institute of Condensed Matter and Nanosciences
- Molecules, Solids and Reactivity (IMCN/MOST)
- Université Catholique de Louvain
- 1348 Louvain-la-Neuve
- Belgium
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132
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Owarzany R, Fijalkowski KJ, Jaroń T, Leszczyński PJ, Dobrzycki Ł, Cyrański MK, Grochala W. Complete Series of Alkali-Metal M(BH3NH2BH2NH2BH3) Hydrogen-Storage Salts Accessed via Metathesis in Organic Solvents. Inorg Chem 2015; 55:37-45. [DOI: 10.1021/acs.inorgchem.5b01688] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Rafał Owarzany
- Faculty of Chemistry, University of Warsaw, ul. Pasteura
1, 02-093 Warsaw, Poland
| | - Karol J. Fijalkowski
- Centre
of New Technologies, University of Warsaw, ul. Zwirki i Wigury 93, 02-089 Warsaw, Poland
| | - Tomasz Jaroń
- Centre
of New Technologies, University of Warsaw, ul. Zwirki i Wigury 93, 02-089 Warsaw, Poland
| | - Piotr J. Leszczyński
- Centre
of New Technologies, University of Warsaw, ul. Zwirki i Wigury 93, 02-089 Warsaw, Poland
| | - Łukasz Dobrzycki
- Faculty of Chemistry, University of Warsaw, ul. Pasteura
1, 02-093 Warsaw, Poland
| | - Michał K. Cyrański
- Faculty of Chemistry, University of Warsaw, ul. Pasteura
1, 02-093 Warsaw, Poland
| | - Wojciech Grochala
- Centre
of New Technologies, University of Warsaw, ul. Zwirki i Wigury 93, 02-089 Warsaw, Poland
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133
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134
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Addition reaction of o -carboranyllithium with nitrile: Formation of a stable zwitterionic iminium salt with a carborane tether. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.09.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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135
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Hulley EB, Kumar N, Raugei S, Bullock RM. Manganese-Based Molecular Electrocatalysts for Oxidation of Hydrogen. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01751] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Elliott B. Hulley
- Center for Molecular Electrocatalysis,
Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352, United States
| | - Neeraj Kumar
- Center for Molecular Electrocatalysis,
Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352, United States
| | - Simone Raugei
- Center for Molecular Electrocatalysis,
Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352, United States
| | - R. Morris Bullock
- Center for Molecular Electrocatalysis,
Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352, United States
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136
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Safin DA, Babashkina MG, Robeyns K, Mitoraj MP, Kubisiak P, Garcia Y. Influence of the Homopolar Dihydrogen Bonding CH⋅⋅⋅HC on Coordination Geometry: Experimental and Theoretical Studies. Chemistry 2015; 21:16679-87. [DOI: 10.1002/chem.201501499] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Damir A. Safin
- Institute of Condensed Matter and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université catholique de Louvain, Place L. Pasteur 1, 1348 Louvain‐la‐Neuve (Belgium)
| | - Maria G. Babashkina
- Institute of Condensed Matter and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université catholique de Louvain, Place L. Pasteur 1, 1348 Louvain‐la‐Neuve (Belgium)
| | - Koen Robeyns
- Institute of Condensed Matter and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université catholique de Louvain, Place L. Pasteur 1, 1348 Louvain‐la‐Neuve (Belgium)
| | - Mariusz P. Mitoraj
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, R. Ingardena 3, 30‐060 Krakow (Poland)
| | - Piotr Kubisiak
- Department of Theoretical Chemistry, Faculty of Chemistry, Jagiellonian University, R. Ingardena 3, 30‐060 Krakow (Poland)
| | - Yann Garcia
- Institute of Condensed Matter and Nanosciences, Molecules, Solids and Reactivity (IMCN/MOST), Université catholique de Louvain, Place L. Pasteur 1, 1348 Louvain‐la‐Neuve (Belgium)
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137
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Geri JB, Szymczak NK. A Proton-Switchable Bifunctional Ruthenium Complex That Catalyzes Nitrile Hydroboration. J Am Chem Soc 2015; 137:12808-14. [DOI: 10.1021/jacs.5b08406] [Citation(s) in RCA: 143] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jacob B. Geri
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109-1055, United States
| | - Nathaniel K. Szymczak
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109-1055, United States
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138
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Li H, Ma N, Meng W, Gallucci J, Qiu Y, Li S, Zhao Q, Zhang J, Zhao JC, Chen X. Formation Mechanisms, Structure, Solution Behavior, and Reactivity of Aminodiborane. J Am Chem Soc 2015; 137:12406-14. [DOI: 10.1021/jacs.5b08033] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Huizhen Li
- Key
Laboratory of Green Chemical Media and Reactions, Ministry of Education,
Collaborative Innovation Center of Henan Province for Green Manufacturing
of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Nana Ma
- Key
Laboratory of Green Chemical Media and Reactions, Ministry of Education,
Collaborative Innovation Center of Henan Province for Green Manufacturing
of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Wenjuan Meng
- Key
Laboratory of Green Chemical Media and Reactions, Ministry of Education,
Collaborative Innovation Center of Henan Province for Green Manufacturing
of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | | | - Yongqing Qiu
- Faculty
of Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Shujun Li
- Key
Laboratory of Green Chemical Media and Reactions, Ministry of Education,
Collaborative Innovation Center of Henan Province for Green Manufacturing
of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Qianyi Zhao
- Key
Laboratory of Green Chemical Media and Reactions, Ministry of Education,
Collaborative Innovation Center of Henan Province for Green Manufacturing
of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Jie Zhang
- Key
Laboratory of Green Chemical Media and Reactions, Ministry of Education,
Collaborative Innovation Center of Henan Province for Green Manufacturing
of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | | | - Xuenian Chen
- Key
Laboratory of Green Chemical Media and Reactions, Ministry of Education,
Collaborative Innovation Center of Henan Province for Green Manufacturing
of Fine Chemicals, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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139
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Zhu H, Huang B, Li J, Jiang Z, Wang B, Wang Z, Zhang RQ. Tunable dipole induced hydrogen bonds between a hydrogen molecule and alkali halides. Phys Chem Chem Phys 2015; 17:20361-7. [PMID: 26194335 DOI: 10.1039/c5cp02598b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydrogen bonding (HB) systems are known to be X-H∙∙∙Y type complexes, which are called conventional HB systems if the X and Y are strongly electronegative atoms such as O, N and halides or unconventional systems if the X is replaced by C. In this study, we devise a new dipole-induced HB that is formed between a hydrogen molecule and an alkali halide using ab initio calculations. The HB is depicted as H-H∙∙∙Y-M, in which MY are alkali halides. Analysis of the possible structures and properties of the proposed compounds, including their geometries, frequencies, bond strength, and natural charge distribution, as well as a topological analysis of electronic density, shows that the large dipole moment of the Y-M molecule is responsible for the generation of the proposed HB. We also find that the strength of HB can be tuned by adopting MY with various polarities. We hope that our findings could provide a new insight into HB.
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Affiliation(s)
- Haiyan Zhu
- Department of Physics and Materials Science and Centre for Functional Photonics (CFP), City University of Hong Kong, Hong Kong SAR, China.
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140
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A Highly Effective Ruthenium System for the Catalyzed Dehydrogenative Cyclization of Amine-Boranes to Cyclic Boranes under Mild Conditions. Chemistry 2015. [DOI: 10.1002/chem.201501569] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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141
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Bullock RM, Helm ML. Molecular electrocatalysts for oxidation of hydrogen using earth-abundant metals: shoving protons around with proton relays. Acc Chem Res 2015; 48:2017-26. [PMID: 26079983 DOI: 10.1021/acs.accounts.5b00069] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Sustainable, carbon-neutral energy is needed to supplant the worldwide reliance on fossil fuels in order to address the persistent problem of increasing emissions of CO2. Solar and wind energy are intermittent, highlighting the need to develop energy storage on a huge scale. Electrocatalysts provide a way to convert between electrical energy generated by renewable energy sources and chemical energy in the form of chemical bonds. Oxidation of hydrogen to give two electrons and two protons is carried out in fuel cells, but the typical catalyst is platinum, a precious metal of low earth abundance and high cost. In nature, hydrogenases based on iron or iron/nickel reversibly oxidize hydrogen with remarkable efficiencies and rates. Functional models of these enzymes have been synthesized with the goal of achieving electrocatalytic H2 oxidation using inexpensive, earth-abundant metals along with a key feature identified in the [FeFe]-hydrogenase: an amine base positioned near the metal. The diphosphine ligands P(R)2N(R')2 (1,5-diaza-3,7-diphosphacyclooctane with alkyl or aryl groups on the P and N atoms) are used as ligands in Ni, Fe, and Mn complexes. The pendant amines facilitate binding and heterolytic cleavage of H2, placing the hydride on the metal and the proton on the amine. The pendant amines also serve as proton relays, accelerating intramolecular and intermolecular proton transfers. Electrochemical oxidations and deprotonations by an exogeneous amine base lead to catalytic cycles for oxidation of H2 (1 atm) at room temperature for catalysts derived from [Ni(P(Cy)2N(R')2)2](2+), Cp(C6F5)Fe(P(tBu)2N(Bn)2)H, and MnH(P(Ph)2N(Bn)2)(bppm)(CO) [bppm = (PAr(F)2)2CH2]. In the oxidation of H2 catalyzed by [Ni(P(Cy)2N(R')2)2](2+), the initial product observed experimentally is a Ni(0) complex in which two of the pendant amines are protonated. Two different pathways can occur from this intermediate; deprotonation followed by oxidation occurs with a lower overpotential than the alternate pathway involving oxidation followed by deprotonation. The Mn cation [Mn(P(Ph)2N(Bn)2)(bppm)(CO)](+) mediates the rapid (>10(4) s(-1) at -95 °C), reversible heterolytic cleavage of H2. Obtaining the optimal benefit of pendant amines incorporated into the ligand requires that the pendant amine be properly positioned to interact with a M-H or M(H2) bond. In addition, ligands are ideally selected such that the hydride-acceptor ability of the metal and the basicity of a pendant are tuned to give low barriers for heterolytic cleavage of the H-H bond and subsequent proton transfer reactions. Using these principles allows the rational design of electrocatalysts for H2 oxidation using earth-abundant metals.
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Affiliation(s)
- R. Morris Bullock
- Center
for Molecular Electrocatalysis,
Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352, United States
| | - Monte L. Helm
- Center
for Molecular Electrocatalysis,
Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352, United States
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142
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Brea O, Mó O, Yáñez M, Alkorta I, Elguero J. Creating σ-Holes through the Formation of Beryllium Bonds. Chemistry 2015. [DOI: 10.1002/chem.201500981] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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143
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Rauchfuss TB. Diiron azadithiolates as models for the [FeFe]-hydrogenase active site and paradigm for the role of the second coordination sphere. Acc Chem Res 2015; 48:2107-16. [PMID: 26079848 DOI: 10.1021/acs.accounts.5b00177] [Citation(s) in RCA: 212] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The [FeFe] hydrogenases (H2ases) catalyze the redox reaction that interconverts protons and H2. This area of biocatalysis has attracted attention because the metal-based chemistry is unusual, and the reactions have practical implications. The active site consists of a [4Fe-4S] cluster bridged to a [Fe2(μ-dithiolate)(CN)2(CO)3](z) center (z = 1- and 2-). The dithiolate cofactor is [HN(CH2S)2](2-), called the azadithiolate ([adt(H)](2-)). Although many derivatives of Fe2(SR)2(CO)6-xLx are electrocatalysts for the hydrogen evolution reaction (HER), most operate by slow nonbiomimetic pathways. Biomimetic hydrogenogenesis is thought to involve intermediates, wherein the hydride substrate is adjacent to the amine of the adt(H), being bonded to only one Fe center. Formation of terminal hydride complexes is favored when the diiron carbonyl models contain azadithiolate. Although unstable in the free state, the adt cofactor is stable once it is affixed to the Fe2 center. It can be prepared by alkylation of Fe2(SH)2(CO)6 with formaldehyde in the presence of ammonia (to give adt(H) derivatives) or amines (to give adt(R) derivatives). Weak acids protonate Fe2(adt(R))(CO)2(PR3)4 to give terminal hydrido (term-H) complexes. In contrast, protonation of the related 1,3-propanedithiolate (pdt(2-)) complexes Fe2(pdt)(CO)2(PR3)4 requires strong acids. The amine in the azadithiolate is a kinetically fast base, relaying protons to and from the iron, which is a kinetically slow base. The crystal structure of the doubly protonated model [(term-H)Fe2(Hadt(H))(CO)2(dppv)2](2+) confirms the presence of both ammonium and terminal hydrido centers, which interact through a dihydrogen bond (dppv = cis-C2H2(PPh2)2). DFT calculations indicate that this H---H interaction is sensitive to the counterions and is strengthened upon reduction of the diiron center. For the monoprotonated models, the hydride [(term-H)Fe2(adt(H))(CO)2(dppv)2](+) exists in equilibrium with the ammonium tautomer [Fe2(Hadt(H))(CO)2(dppv)2](+). Both [(term-H)Fe2(Hadt(H))(CO)2(dppv)2](2+) and [(term-H)Fe2(adt(H))(CO)2(dppv)2](+) are highly active electrocatalysts for HER. Catalysis is initiated by reduction of the diferrous center, which induces coupling of the protic ammonium center and the hydride ligand. In contrast, the propanedithiolate [(term-H)Fe2(pdt)(CO)2(dppv)2](+) is a poor electrocatalyst for HER. Oxidation of H2 has been demonstrated, starting with models for the oxidized state ("Hox"), for example, [Fe2(adt(H))(CO)3(dppv)(PMe3)](+). Featuring a distorted Fe(II)Fe(I) center, this Hox model reacts slowly with high pressures of H2 to give [(μ-H)Fe2(adt(H))(CO)3(dppv)(PMe3)](+). Highlighting the role of the proton relay, the propanedithiolate [Fe2(pdt)(CO)3(dppv)(PMe3)](+) is unreactive toward H2. The Hox-model + H2 reaction is accelerated in the presence of ferrocenium salts, which simulate the role of the attached [4Fe-4S] cluster. The redox-complemented complex [Fe2(adt(Bn))(CO)3(dppv)(FcP*)](n+) catalyzes both proton reduction and hydrogen oxidation (FcP* = (C5Me5)Fe(C5Me4CH2PEt2)).
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Affiliation(s)
- Thomas B. Rauchfuss
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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144
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Zhang S, Bullock RM. Molybdenum Hydride and Dihydride Complexes Bearing Diphosphine Ligands with a Pendant Amine: Formation of Complexes with Bound Amines. Inorg Chem 2015; 54:6397-409. [DOI: 10.1021/acs.inorgchem.5b00728] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shaoguang Zhang
- Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352, United States
| | - R. Morris Bullock
- Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352, United States
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145
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Liu T, Liao Q, O’Hagan M, Hulley EB, DuBois DL, Bullock RM. Iron Complexes Bearing Diphosphine Ligands with Positioned Pendant Amines as Electrocatalysts for the Oxidation of H2. Organometallics 2015. [DOI: 10.1021/om501289f] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
| | - Qian Liao
- Center
for Molecular Electrocatalysis, Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352 United States
- Department
of Chemistry, Tsinghua University, Beijing 100084, China
| | - Molly O’Hagan
- Center
for Molecular Electrocatalysis, Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352 United States
| | - Elliott B. Hulley
- Department
of Chemistry, University of Wyoming, Dept. 3838, Laramie, Wyoming 82071 United States
| | - Daniel L. DuBois
- Center
for Molecular Electrocatalysis, Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352 United States
| | - R. Morris Bullock
- Center
for Molecular Electrocatalysis, Physical Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-12, Richland, Washington 99352 United States
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146
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Sandhya KS, Suresh CH. Designing metal hydride complexes for water splitting reactions: a molecular electrostatic potential approach. Dalton Trans 2015; 43:12279-87. [PMID: 24984110 DOI: 10.1039/c4dt01343c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The hydridic character of octahedral metal hydride complexes of groups VI, VII and VIII has been systematically studied using molecular electrostatic potential (MESP) topography. The absolute minimum of MESP at the hydride ligand (Vmin) and the MESP value at the hydride nucleus (VH) are found to be very good measures of the hydridic character of the hydride ligand. The increasing/decreasing electron donating feature of the ligand environment is clearly reflected in the increasing/decreasing negative character of Vmin and VH. The formation of an outer sphere metal hydride-water complex showing the HH dihydrogen interaction is supported by the location and the value of Vmin near the hydride ligand. A higher negative MESP suggested lower activation energy for H2 elimination. Thus, MESP features provided a way to fine-tune the ligand environment of a metal-hydride complex to achieve high hydridicity for the hydride ligand. The applicability of an MESP based hydridic descriptor in designing water splitting reactions is tested for group VI metal hydride model complexes of tungsten.
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Affiliation(s)
- K S Sandhya
- Inorganic and Theoretical Chemistry Section, CSTD, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum-695019, India.
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147
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Eguillor B, Esteruelas MA, Fernández I, Gómez-Gallego M, Lledós A, Martín-Ortiz M, Oliván M, Oñate E, Sierra MA. Azole Assisted C–H Bond Activation Promoted by an Osmium-Polyhydride: Discerning between N and NH. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00174] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Beatriz Eguillor
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Esteruelas
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Israel Fernández
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas,
Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad Complutense, 28040 Madrid, Spain
| | - Mar Gómez-Gallego
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas,
Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad Complutense, 28040 Madrid, Spain
| | - Agustí Lledós
- Departament
de Química, Centro de Innovación en Química Avanzada
(ORFEO-CINQA), Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Mamen Martín-Ortiz
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas,
Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad Complutense, 28040 Madrid, Spain
| | - Montserrat Oliván
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Enrique Oñate
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea (ISQCH), Centro
de Innovación en Química Avanzada (ORFEO-CINQA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
| | - Miguel A. Sierra
- Departamento
de Química Orgánica, Facultad de Ciencias Químicas,
Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universidad Complutense, 28040 Madrid, Spain
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148
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Darmon JM, Kumar N, Hulley EB, Weiss CJ, Raugei S, Bullock RM, Helm ML. Increasing the rate of hydrogen oxidation without increasing the overpotential: a bio-inspired iron molecular electrocatalyst with an outer coordination sphere proton relay. Chem Sci 2015; 6:2737-2745. [PMID: 29142678 PMCID: PMC5654417 DOI: 10.1039/c5sc00398a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 03/04/2015] [Indexed: 02/04/2023] Open
Abstract
Oxidation of hydrogen (H2) to protons and electrons for energy production in fuel cells is currently catalyzed by platinum, but its low abundance and high cost present drawbacks to widespread adoption. Precisely controlled proton removal from the active site is critical in hydrogenase enzymes in nature that catalyze H2 oxidation using earth-abundant metals (iron and nickel). Here we report a synthetic iron complex, (CpC5F4N)Fe(PEtN(CH2)3NMe2 PEt)(Cl), that serves as a precatalyst for the oxidation of H2, with turnover frequencies of 290 s-1 in fluorobenzene, under 1 atm of H2 using 1,4-diazabicyclo[2.2.2]octane (DABCO) as the exogenous base. The inclusion of a properly tuned outer coordination sphere proton relay results in a cooperative effect between the primary, secondary and outer coordination spheres for moving protons, increasing the rate of H2 oxidation without increasing the overpotential when compared with the analogous complex featuring a single pendant base. This finding emphasizes the key role of pendant amines in mimicking the functionality of the proton pathway in the hydrogenase enzymes.
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Affiliation(s)
- Jonathan M Darmon
- Center for Molecular Electrocatalysis , Physical Sciences Division , Pacific Northwest National Laboratory , P.O. Box 999, K2-57 , Richland , Washington 99352 , USA .
| | - Neeraj Kumar
- Center for Molecular Electrocatalysis , Physical Sciences Division , Pacific Northwest National Laboratory , P.O. Box 999, K2-57 , Richland , Washington 99352 , USA .
| | - Elliott B Hulley
- Center for Molecular Electrocatalysis , Physical Sciences Division , Pacific Northwest National Laboratory , P.O. Box 999, K2-57 , Richland , Washington 99352 , USA .
| | - Charles J Weiss
- Center for Molecular Electrocatalysis , Physical Sciences Division , Pacific Northwest National Laboratory , P.O. Box 999, K2-57 , Richland , Washington 99352 , USA .
| | - Simone Raugei
- Center for Molecular Electrocatalysis , Physical Sciences Division , Pacific Northwest National Laboratory , P.O. Box 999, K2-57 , Richland , Washington 99352 , USA .
| | - R Morris Bullock
- Center for Molecular Electrocatalysis , Physical Sciences Division , Pacific Northwest National Laboratory , P.O. Box 999, K2-57 , Richland , Washington 99352 , USA .
| | - Monte L Helm
- Center for Molecular Electrocatalysis , Physical Sciences Division , Pacific Northwest National Laboratory , P.O. Box 999, K2-57 , Richland , Washington 99352 , USA .
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149
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Solimannejad M, Jouypazadeh H, Farrokhpour H. Rovibrational energy and spectroscopic constant calculations of complexes pairing via dihydrogen bonds. J Mol Model 2015; 21:119. [PMID: 25877527 DOI: 10.1007/s00894-015-2662-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Accepted: 03/23/2015] [Indexed: 11/25/2022]
Abstract
In the present investigation, we performed a thorough study of potential energy curves, rovibrational spectra, and spectroscopic constants for complexes pairing via dihydrogen bonds. In particular, we dealt with LiH···HX (X = F, CN, CCH, CCF, CCCl) complexes by employing accurate electronic energy calculations at the MP2/aug-cc-pVDZ level of theory. Following this, the Numerov method was applied to solve the nuclear Schrödinger equation, thus obtaining spectroscopic constants and rovibrational spectra. Good linear correlation between the magnitudes of the interaction energies for interaction of HX with LiH, and the most positive electrostatic potentials of hydrogen in HX, was established.
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Affiliation(s)
- Mohammad Solimannejad
- Department of Chemistry, Faculty of Sciences, Arak University, Arak, 38156-8-8349, Iran,
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150
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Golub IE, Gulyaeva ES, Filippov OA, Dyadchenko VP, Belkova NV, Epstein LM, Arkhipov DE, Shubina ES. Dihydrogen bond intermediated alcoholysis of dimethylamine-borane in nonaqueous media. J Phys Chem A 2015; 119:3853-68. [PMID: 25822484 DOI: 10.1021/acs.jpca.5b01921] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Dimethylamine-borane (DMAB) acid/base properties, its dihydrogen-bonded (DHB) complexes and proton transfer reaction in nonaqueous media were investigated both experimentally (IR, UV/vis, NMR, and X-ray) and theoretically (DFT, NBO, QTAIM, and NCI). The effects of DMAB concentration, solvents polarity and temperature on the degree of DMAB self-association are shown and the enthalpy of association is determined experimentally for the first time (-ΔH°assoc = 1.5-2.3 kcal/mol). The first case of "improper" (blue-shifting) NH···F hydrogen bonds was observed in fluorobenzene and perfluorobenzene solutions. It was shown that hydrogen-bonded complexes are the intermediates of proton transfer from alcohols and phenols to DMAB. The reaction mechanism was examined computationally taking into account the coordinating properties of the reaction media. The values of the rate constants of proton transfer from HFIP to DMAB in acetone were determined experimentally [(7.9 ± 0.1) × 10(-4) to (1.6 ± 0.1) × 10(-3) mol(-1)·s(-1)] at 270-310 K. Computed activation barrier of this reaction ΔG(‡theor)298 K(acetone) = 23.8 kcal/mol is in good agreement with the experimental value of the activation free energy ΔG(‡exp)270 K = 21.1 kcal/mol.
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Affiliation(s)
- Igor E Golub
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia.,‡Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119234 Moscow, Russia
| | - Ekaterina S Gulyaeva
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia.,‡Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119234 Moscow, Russia
| | - Oleg A Filippov
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia
| | - Victor P Dyadchenko
- ‡Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119234 Moscow, Russia
| | - Natalia V Belkova
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia
| | - Lina M Epstein
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia
| | - Dmitry E Arkhipov
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia
| | - Elena S Shubina
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia
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