101
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Takayanagi T, Nakatomi T. Automated reaction path searches for spin-forbidden reactions. J Comput Chem 2018; 39:1319-1326. [PMID: 29504140 DOI: 10.1002/jcc.25202] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 02/02/2018] [Accepted: 02/14/2018] [Indexed: 01/09/2023]
Abstract
Many catalytic and biomolecular reactions containing transition metals involve changes in the electronic spin state. These processes are referred to as "spin-forbidden" reactions within nonrelativistic quantum mechanics framework. To understand detailed reaction mechanisms of spin-forbidden reactions, one must characterize reaction pathways on potential energy surfaces with different spin states and then identify crossing points. Here we propose a practical computational scheme, where only the lowest mixed-spin eigenstate obtained from the diagonalization of the spin-coupled Hamiltonian matrix is used in reaction path search calculations. We applied this method to the 6,4 FeO+ + H2 → 6,4 Fe+ + H2 O, 6,4 FeO+ + CH4 → 6,4 Fe+ + CH3 OH, and 7 Mn+ + OCS → 5 MnS+ + CO reactions, for which crossings between the different spin states are known to play essential roles in the overall reaction kinetics. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Toshiyuki Takayanagi
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-Ku, Saitama City, Saitama, 338-8570, Japan
| | - Taiki Nakatomi
- Department of Chemistry, Saitama University, Shimo-Okubo 255, Sakura-Ku, Saitama City, Saitama, 338-8570, Japan
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102
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Soupart A, Dixon IM, Alary F, Heully JL. DFT rationalization of the room-temperature luminescence properties of Ru(bpy)
3
2+
and Ru(tpy)
2
2+
: 3MLCT–3MC minimum energy path from NEB calculations and emission spectra from VRES calculations. Theor Chem Acc 2018. [DOI: 10.1007/s00214-018-2216-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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103
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Vieira BJC, da Gama V, Santos IC, Pereira LCJ, Bandeira NAG, Waerenborgh JC. Magnetic and structural correlations in [Fe(nsal2trien)] salts: the role of cation–anion interactions in the spin crossover phenomenon. CrystEngComm 2018. [DOI: 10.1039/c8ce00275d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cation–anion and cation–solvent–anion interactions determine the SCO behaviour of six [FeIII(nsal2trien)] salts.
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Affiliation(s)
- Bruno J. C. Vieira
- Centro de Ciências e Tecnologias Nucleares (C2TN)
- Instituto Superior Técnico
- Universidade de Lisboa
- 2695-066 Bobadela LRS
- Portugal
| | - Vasco da Gama
- Centro de Ciências e Tecnologias Nucleares (C2TN)
- Instituto Superior Técnico
- Universidade de Lisboa
- 2695-066 Bobadela LRS
- Portugal
| | - Isabel C. Santos
- Centro de Ciências e Tecnologias Nucleares (C2TN)
- Instituto Superior Técnico
- Universidade de Lisboa
- 2695-066 Bobadela LRS
- Portugal
| | - Laura C. J. Pereira
- Centro de Ciências e Tecnologias Nucleares (C2TN)
- Instituto Superior Técnico
- Universidade de Lisboa
- 2695-066 Bobadela LRS
- Portugal
| | - Nuno A. G. Bandeira
- Institute of Chemical Research of Catalonia (ICIQ)
- 16-43007 Tarragona
- Spain
- Centro de Química Estrutural – Instituto Superior Técnico
- Universidade de Lisboa
| | - João C. Waerenborgh
- Centro de Ciências e Tecnologias Nucleares (C2TN)
- Instituto Superior Técnico
- Universidade de Lisboa
- 2695-066 Bobadela LRS
- Portugal
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104
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Gaggioli CA, Belpassi L, Tarantelli F, Harvey JN, Belanzoni P. Spin-Forbidden Reactions: Adiabatic Transition States Using Spin-Orbit Coupled Density Functional Theory. Chemistry 2017; 24:5006-5015. [DOI: 10.1002/chem.201704608] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Carlo Alberto Gaggioli
- Department of Chemistry; Chemical Theory Center and Supercomputing Institute; University of Minnesota; 207 Pleasant Street SE 55455-0431 Minneapolis Minnesota USA
| | - Leonardo Belpassi
- Institute of Molecular Science and Technologies (ISTM)-; CNR; via Elce di Sotto 8 06123 Perugia Italy
- Consortium for Computational Molecular and Materials Sciences (CMS); via Elce di Sotto 8 06123 Perugia Italy
| | - Francesco Tarantelli
- Institute of Molecular Science and Technologies (ISTM)-; CNR; via Elce di Sotto 8 06123 Perugia Italy
- Consortium for Computational Molecular and Materials Sciences (CMS); via Elce di Sotto 8 06123 Perugia Italy
- Department of Chemistry; Biology and Biotechnology; University of Perugia; via Elce di Sotto 8 06123 Perugia Italy
| | - Jeremy N. Harvey
- Department of Chemistry; KU Leuven; Celestijnenlaan 200F B-3001 Heverlee Belgium
| | - Paola Belanzoni
- Institute of Molecular Science and Technologies (ISTM)-; CNR; via Elce di Sotto 8 06123 Perugia Italy
- Consortium for Computational Molecular and Materials Sciences (CMS); via Elce di Sotto 8 06123 Perugia Italy
- Department of Chemistry; Biology and Biotechnology; University of Perugia; via Elce di Sotto 8 06123 Perugia Italy
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105
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Zhou S, Schlangen M, Schwarz H. Spin-Selective, Competitive Hydrogen-Atom Transfer versus CH2
O-Generation from the CH4
/[ReO4
]+
Couple at Ambient Conditions. Chemistry 2017; 23:17469-17472. [DOI: 10.1002/chem.201704892] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Shaodong Zhou
- Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering; Zhejiang University; 310027 Hangzhou P.R. China
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
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106
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Schwarz H, Shaik S, Li J. Electronic Effects on Room-Temperature, Gas-Phase C-H Bond Activations by Cluster Oxides and Metal Carbides: The Methane Challenge. J Am Chem Soc 2017; 139:17201-17212. [PMID: 29112810 DOI: 10.1021/jacs.7b10139] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
This Perspective discusses a story of one molecule (methane), a few metal-oxide cationic clusters (MOCCs), dopants, metal-carbide cations, oriented-electric fields (OEFs), and a dizzying mechanistic landscape of methane activation! One mechanism is hydrogen atom transfer (HAT), which occurs whenever the MOCC possesses a localized oxyl radical (M-O•). Whenever the radical is delocalized, e.g., in [MgO]n•+ the HAT barrier increases due to the penalty of radical localization. Adding a dopant (Ga2O3) to [MgO]2•+ localizes the radical and HAT transpires. Whenever the radical is located on the metal centers as in [Al2O2]•+ the mechanism crosses over to proton-coupled electron transfer (PCET), wherein the positive Al center acts as a Lewis acid that coordinates the methane molecule, while one of the bridging oxygen atoms abstracts a proton, and the negatively charged CH3 moiety relocates to the metal fragment. We provide a diagnostic plot of barriers vs reactants' distortion energies, which allows the chemist to distinguish HAT from PCET. Thus, doping of [MgO]2•+ by Al2O3 enables HAT and PCET to compete. Similarly, [ZnO]•+ activates methane by PCET generating many products. Adding a CH3CN ligand to form [(CH3CN)ZnO]•+ leads to a single HAT product. The CH3CN dipole acts as an OEF that switches off PCET. [MC]+ cations (M = Au, Cu) act by different mechanisms, dictated by the M+-C bond covalence. For example, Cu+, which bonds the carbon atom mostly electrostatically, performs coupling of C to methane to yield ethylene, in a single almost barrier-free step, with an unprecedented atomic choreography catalyzed by the OEF of Cu+.
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Affiliation(s)
- Helmut Schwarz
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Sason Shaik
- Institute of Chemistry, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
| | - Jilai Li
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin, Germany.,Institute of Theoretical Chemistry, Jilin University , Changchun 130023, P.R. China
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107
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Maeda S, Harabuchi Y, Takagi M, Saita K, Suzuki K, Ichino T, Sumiya Y, Sugiyama K, Ono Y. Implementation and performance of the artificial force induced reaction method in the GRRM17 program. J Comput Chem 2017; 39:233-251. [PMID: 29135034 PMCID: PMC5765425 DOI: 10.1002/jcc.25106] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2017] [Revised: 10/16/2017] [Accepted: 10/18/2017] [Indexed: 12/20/2022]
Abstract
This article reports implementation and performance of the artificial force induced reaction (AFIR) method in the upcoming 2017 version of GRRM program (GRRM17). The AFIR method, which is one of automated reaction path search methods, induces geometrical deformations in a system by pushing or pulling fragments defined in the system by an artificial force. In GRRM17, three different algorithms, that is, multicomponent algorithm (MC-AFIR), single-component algorithm (SC-AFIR), and double-sphere algorithm (DS-AFIR), are available, where the MC-AFIR was the only algorithm which has been available in the previous 2014 version. The MC-AFIR does automated sampling of reaction pathways between two or more reactant molecules. The SC-AFIR performs automated generation of global or semiglobal reaction path network. The DS-AFIR finds a single path between given two structures. Exploration of minimum energy structures within the hypersurface in which two different electronic states degenerate, and an interface with the quantum mechanics/molecular mechanics method, are also described. A code termed SAFIRE will also be available, as a visualization software for complicated reaction path networks. © 2017 The Authors. Journal of Computational Chemistry Published by Wiley Periodicals, Inc.
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Affiliation(s)
- Satoshi Maeda
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Yu Harabuchi
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Saitama, 332-0012, Japan
| | - Makito Takagi
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, 060-8628, Japan
| | - Kenichiro Saita
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Kimichi Suzuki
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan.,Fukui Institute for Fundamental Chemistry, Kyoto University, Kyoto, 606-8103, Japan
| | - Tomoya Ichino
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Yosuke Sumiya
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, 060-8628, Japan
| | - Kanami Sugiyama
- Graduate School of Chemical Sciences and Engineering, Hokkaido University, Sapporo, 060-8628, Japan
| | - Yuriko Ono
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
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108
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Engel J, Smit W, Foscato M, Occhipinti G, Törnroos KW, Jensen VR. Loss and Reformation of Ruthenium Alkylidene: Connecting Olefin Metathesis, Catalyst Deactivation, Regeneration, and Isomerization. J Am Chem Soc 2017; 139:16609-16619. [DOI: 10.1021/jacs.7b07694] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Julien Engel
- Institute
of Organic Chemistry, RWTH Aachen University, Landoltweg 1, D-52074 Aachen, Germany
| | - Wietse Smit
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Marco Foscato
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Giovanni Occhipinti
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Karl W. Törnroos
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
| | - Vidar R. Jensen
- Department
of Chemistry, University of Bergen, Allégaten 41, N-5007 Bergen, Norway
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109
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Zhou S, Firouzbakht M, Schlangen M, Kaupp M, Schwarz H. On the Electronic Origin of Remarkable Ligand Effects on the Reactivities of [NiL] + Complexes (L=C 6 H 5 , C 5 H 4 N, CN) towards Methane. Chemistry 2017; 23:14430-14433. [PMID: 28865112 DOI: 10.1002/chem.201703767] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Indexed: 11/07/2022]
Abstract
The gas-phase reactions of [NiL]+ (L=C6 H5 , C5 H4 N, CN) with methane have been explored by using electrospray-ionization mass spectrometry (ESI-MS) complemented by quantum chemical calculations. Though the phenyl Ni complex [Ni(C6 H5 )]+ exclusively abstracts one hydrogen atom from methane at ambient conditions, the cyano Ni complex [Ni(CN)]+ brings about both H-atom abstraction and ligand exchange to generate [Ni(CH3 )]+ . In contrast, the complex 2-pyridinyl Ni [Ni(C5 H4 N)]+ is inert towards this substrate. The presence of the empty 4s(Ni) orbital dominates the proton-coupled electron transfer (PCET) processes for the investigated systems.
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Affiliation(s)
- Shaodong Zhou
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany.,Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Marjan Firouzbakht
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Maria Schlangen
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Martin Kaupp
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Helmut Schwarz
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
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110
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Guo Y, Li H, He LL, Zhao DX, Gong LD, Yang ZZ. Theoretical reflections on the structural polymorphism of the oxygen-evolving complex in the S2 state and the correlations to substrate water exchange and water oxidation mechanism in photosynthesis. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2017; 1858:833-846. [DOI: 10.1016/j.bbabio.2017.08.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 06/25/2017] [Accepted: 08/02/2017] [Indexed: 11/29/2022]
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111
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Motz AR, Herring AM, Vyas S, Maupin CM. Quantum-Mechanical Study of the Reaction Mechanism for 2π-2π Cycloaddition of Fluorinated Methylene Groups. J Org Chem 2017; 82:6578-6585. [PMID: 28548848 DOI: 10.1021/acs.joc.7b00597] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Perfluorocyclobutyl polymers are thermally and chemically stable, may be produced without a catalyst via thermal 2π-2π cycloaddition, and can form block structures, making them suitable for commercialization of specialty polymers. Thermal 2π-2π cycloaddition is a rare reaction that begins in the singlet state and proceeds through a triplet intermediate to form an energetically stable four-membered ring in the singlet state. This reaction involves two changes in spin state and, thus, two spin-crossover transitions. Presented here are density functional theory calculations that evaluate the energetics and reaction mechanisms for the dimerizations of two different polyfluorinated precursors, 1,1,2-trifluoro-2-(trifluoromethoxy)ethane and hexafluoropropylene. The spin-crossover transition states are thoroughly investigated, revealing important kinetics steps and an activation energy for the gas-phase cycloaddition of two hexafluoropropene molecules of 36.9 kcal/mol, which is in good agreement with the experimentally determined value of 34.3 kcal/mol. It is found that the first carbon-carbon bond formation is the rate-limiting step, followed by a rotation about the newly formed bond in the triplet state that results in the formation of the second carbon-carbon bond. Targeting the rotation of the C-C bond, a set of parameters were obtained that best produce high molecular weight polymers using this chemistry.
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Affiliation(s)
- Andrew R Motz
- Department of Chemical & Biological Engineering, Colorado School of Mines , Golden, Colorado 80401, United States
| | - Andrew M Herring
- Department of Chemical & Biological Engineering, Colorado School of Mines , Golden, Colorado 80401, United States
| | - Shubham Vyas
- Department of Chemistry, Colorado School of Mines , Golden, Colorado 80401, United States
| | - C Mark Maupin
- Department of Chemical & Biological Engineering, Colorado School of Mines , Golden, Colorado 80401, United States
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112
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Coste SC, Vlaisavljevich B, Freedman DE. Magnetic Anisotropy from Main-Group Elements: Halides versus Group 14 Elements. Inorg Chem 2017; 56:8195-8202. [DOI: 10.1021/acs.inorgchem.7b00923] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Scott C. Coste
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Bess Vlaisavljevich
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Danna E. Freedman
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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113
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Draksharapu A, Rasheed W, Klein JEMN, Que L. Facile and Reversible Formation of Iron(III)–Oxo–Cerium(IV) Adducts from Nonheme Oxoiron(IV) Complexes and Cerium(III). Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704322] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Apparao Draksharapu
- Department of Chemistry and Center for Metals in Biocatalysis University of Minnesota Minneapolis MN 55455 USA
| | - Waqas Rasheed
- Department of Chemistry and Center for Metals in Biocatalysis University of Minnesota Minneapolis MN 55455 USA
| | - Johannes E. M. N. Klein
- Department of Chemistry and Center for Metals in Biocatalysis University of Minnesota Minneapolis MN 55455 USA
| | - Lawrence Que
- Department of Chemistry and Center for Metals in Biocatalysis University of Minnesota Minneapolis MN 55455 USA
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114
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Draksharapu A, Rasheed W, Klein JEMN, Que L. Facile and Reversible Formation of Iron(III)-Oxo-Cerium(IV) Adducts from Nonheme Oxoiron(IV) Complexes and Cerium(III). Angew Chem Int Ed Engl 2017; 56:9091-9095. [PMID: 28598024 DOI: 10.1002/anie.201704322] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Indexed: 11/09/2022]
Abstract
Ceric ammonium nitrate (CAN) or CeIV (NH4 )2 (NO3 )6 is often used in artificial water oxidation and generally considered to be an outer-sphere oxidant. Herein we report the spectroscopic and crystallographic characterization of [(N4Py)FeIII -O-CeIV (OH2 )(NO3 )4 ]+ (3), a complex obtained from the reaction of [(N4Py)FeII (NCMe)]2+ with 2 equiv CAN or [(N4Py)FeIV =O]2+ (2) with CeIII (NO3 )3 in MeCN. Surprisingly, the formation of 3 is reversible, the position of the equilibrium being dependent on the MeCN/water ratio of the solvent. These results suggest that the FeIV and CeIV centers have comparable reduction potentials. Moreover, the equilibrium entails a change in iron spin state, from S=1 FeIV in 2 to S=5/2 in 3, which is found to be facile despite the formal spin-forbidden nature of this process. This observation suggests that FeIV =O complexes may avail of reaction pathways involving multiple spin states having little or no barrier.
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Affiliation(s)
- Apparao Draksharapu
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Waqas Rasheed
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Johannes E M N Klein
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Lawrence Que
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, Minneapolis, MN, 55455, USA
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115
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Kupper C, Mondal B, Serrano-Plana J, Klawitter I, Neese F, Costas M, Ye S, Meyer F. Nonclassical Single-State Reactivity of an Oxo-Iron(IV) Complex Confined to Triplet Pathways. J Am Chem Soc 2017; 139:8939-8949. [PMID: 28557448 DOI: 10.1021/jacs.7b03255] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
C-H bond activation mediated by oxo-iron (IV) species represents the key step of many heme and nonheme O2-activating enzymes. Of crucial interest is the effect of spin state of the FeIV(O) unit. Here we report the C-H activation kinetics and corresponding theoretical investigations of an exclusive tetracarbene ligated oxo-iron(IV) complex, [LNHCFeIV(O)(MeCN)]2+ (1). Kinetic traces using substrates with bond dissociation energies (BDEs) up to 80 kcal mol-1 show pseudo-first-order behavior and large but temperature-dependent kinetic isotope effects (KIE 32 at -40 °C). When compared with a topologically related oxo-iron(IV) complex bearing an equatorial N-donor ligand, [LTMCFeIV(O) (MeCN)]2+ (A), the tetracarbene complex 1 is significantly more reactive with second order rate constants k'2 that are 2-3 orders of magnitude higher. UV-vis experiments in tandem with cryospray mass spectrometry evidence that the reaction occurs via formation of a hydroxo-iron(III) complex (4) after the initial H atom transfer (HAT). An extensive computational study using a wave function based multireference approach, viz. complete active space self-consistent field (CASSCF) followed by N-electron valence perturbation theory up to second order (NEVPT2), provided insight into the HAT trajectories of 1 and A. Calculated free energy barriers for 1 reasonably agree with experimental values. Because the strongly donating equatorial tetracarbene pushes the Fe-dx2-y2 orbital above dz2, 1 features a dramatically large quintet-triplet gap of ∼18 kcal/mol compared to ∼2-3 kcal/mol computed for A. Consequently, the HAT process performed by 1 occurs on the triplet surface only, in contrast to complex A reported to feature two-state-reactivity with contributions from both triplet and quintet states. Despite this, the reactive FeIV(O) units in 1 and A undergo the same electronic-structure changes during HAT. Thus, the unique complex 1 represents a pure "triplet-only" ferryl model.
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Affiliation(s)
- Claudia Kupper
- Universität Göttingen , Institut für Anorganische Chemie, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Bhaskar Mondal
- Max-Planck Institut für Chemische Energiekonversion , Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Joan Serrano-Plana
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Quimica, Universitat de Girona , Campus Montilivi, E17071 Girona, Catalonia, Spain
| | - Iris Klawitter
- Universität Göttingen , Institut für Anorganische Chemie, Tammannstrasse 4, 37077 Göttingen, Germany
| | - Frank Neese
- Max-Planck Institut für Chemische Energiekonversion , Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Miquel Costas
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Quimica, Universitat de Girona , Campus Montilivi, E17071 Girona, Catalonia, Spain
| | - Shengfa Ye
- Max-Planck Institut für Chemische Energiekonversion , Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Franc Meyer
- Universität Göttingen , Institut für Anorganische Chemie, Tammannstrasse 4, 37077 Göttingen, Germany
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116
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Ma Y, Knecht S, Keller S, Reiher M. Second-Order Self-Consistent-Field Density-Matrix Renormalization Group. J Chem Theory Comput 2017; 13:2533-2549. [DOI: 10.1021/acs.jctc.6b01118] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yingjin Ma
- Laboratorium für Physikalische
Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Stefan Knecht
- Laboratorium für Physikalische
Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Sebastian Keller
- Laboratorium für Physikalische
Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Markus Reiher
- Laboratorium für Physikalische
Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
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117
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Zhou S, Li J, Firouzbakht M, Schlangen M, Schwarz H. Sequential Gas-Phase Activation of Carbon Dioxide and Methane by [Re(CO) 2] +: The Sequence of Events Matters! J Am Chem Soc 2017; 139:6169-6176. [PMID: 28403605 DOI: 10.1021/jacs.7b01255] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The potential of carbonyl rhenium complexes in activating and coupling carbon dioxide and methane has been explored by using a combination of gas-phase experiments (FT-ICR mass spectrometry) and high-level quantum chemical calculations. While the complexes [Re(CO)x]+ (x = 0, 1, 3) are thermally unreactive toward CO2, [Re(CO)2]+ abstracts one oxygen atom from this substrate spontaneously at ambient conditions. Based on 13C and 18O labeling experiments, the newly generated CO ligand is preferentially eliminated, and two mechanistic scenarios are considered to account for this unexpected finding. The oxo complex [ORe(CO)2]+ reacts further with CH4 to produce the dihydridomethylene complex [ORe(CO)(CH2)(H)2]+. However, coupling of the CO and CH2 ligands to form CH2═C═O does not take place. Further, the complexes [Re(CO)x(CH2)]+ (x = 1, 2), generated in the thermal reaction of [Re(CO)x]+ (x = 1, 2) with CH4, are inert toward CO2. Mechanistic insight on the origin of this remarkable reactivity pattern has been derived from detailed quantum chemical calculations.
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Affiliation(s)
- Shaodong Zhou
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Jilai Li
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin, Germany.,Institute of Theoretical Chemistry, Jilin University , Changchun 130023, People's Republic of China
| | - Marjan Firouzbakht
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Maria Schlangen
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Helmut Schwarz
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin, Germany
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118
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Leitão EFV, Ventura E, de Souza MAF, Riveros JM, do Monte SA. Spin-Forbidden Branching in the Mechanism of the Intrinsic Haber-Weiss Reaction. ChemistryOpen 2017. [PMID: 28638768 PMCID: PMC5474656 DOI: 10.1002/open.201600169] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The mechanism of the O2⋅− and H2O2 reaction (Haber–Weiss) under solvent‐free conditions has been characterized at the DFT and CCSD(T) level of theory to account for the ease of this reaction in the gas phase and the formation of two different set of products (Blanksby et al., Angew. Chem. Int. Ed. 2007, 46, 4948). The reaction is shown to proceed through an electron‐transfer process from the superoxide anion to hydrogen peroxide, along two pathways. While the O3⋅− + H2O products are formed from a spin‐allowed reaction (on the doublet surface), the preferred products, O⋅−(H2O)+3O2, are formed through a spin‐forbidden reaction as a result of a favorable crossing point between the doublet and quartet surface. Plausible reasons for the preference toward the latter set are given in terms of the characteristics of the minimum energy crossing point (MECP) and the stability of an intermediate formed (after the MECP) in the quartet surface. These unique results show that these two pathways are associated with a bifurcation, yielding spin‐dependent products.
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Affiliation(s)
- Ezequiel F V Leitão
- Departamento de Química Universidade Federal da ParaíbaJoão Pessoa, PB 58.059-900 Brazil
| | - Elizete Ventura
- Departamento de Química Universidade Federal da ParaíbaJoão Pessoa, PB 58.059-900 Brazil
| | - Miguel A F de Souza
- Instituto de Química Universidade Federal do Rio Grande do Norte Natal, RN 59072-970 Brazil
| | - José M Riveros
- Departamento de Química Fundamental Universidade de São Paulo Av. Prof. Lineu Prestes, 748 05508-000 São Paulo, SP, Brazil João Pessoa, PB, 58.059-900 Brazil
| | - Silmar A do Monte
- Departamento de Química Universidade Federal da ParaíbaJoão Pessoa, PB 58.059-900 Brazil
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119
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Zhou S, Li J, Schlangen M, Schwarz H. On the Origin of Reactivity Enhancement/Suppression upon Sequential Ligation: [Re(CO) x ] + /CH 4 (x=0-3) Couples. Angew Chem Int Ed Engl 2017; 56:2951-2954. [PMID: 28140500 DOI: 10.1002/anie.201611826] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Indexed: 11/11/2022]
Abstract
The thermal gas-phase reactions of rhenium carbonyl complexes [Re(CO)x ]+ (x=0-3) with methane have been explored by using FT-ICR mass spectrometry complemented by high-level quantum chemical calculation. While it had been concluded in previous studies that addition of closed-shell ligands in general decreases the reactivity of metal ions, the current work provides an exception: the previously demonstrated inertness of atomic Re+ towards methane is completely changed upon ligation with CO. Both [Re(CO)]+ and [Re(CO)2 ]+ bring about efficient dehydrogenation of the hydrocarbon under ambient conditions. However, addition of a third ligand to form [Re(CO)3 ]+ completely quenches the reactivity.
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Affiliation(s)
- Shaodong Zhou
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Jilai Li
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany.,Institute of Theoretical Chemistry, Jilin University, Changchun, 130023, P.R. China
| | - Maria Schlangen
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
| | - Helmut Schwarz
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, 10623, Berlin, Germany
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120
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Schwarz H. Metal-mediated activation of carbon dioxide in the gas phase: Mechanistic insight derived from a combined experimental/computational approach. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.03.009] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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121
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Zhou S, Li J, Schlangen M, Schwarz H. On the Origin of Reactivity Enhancement/Suppression upon Sequential Ligation: [Re(CO)
x
]+
/CH4
(x=
0-
3) Couples. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611826] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Jilai Li
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
- Institute of Theoretical Chemistry; Jilin University; Changchun 130023 P.R. China
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
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122
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Schwarz H. Ménage-à-trois: single-atom catalysis, mass spectrometry, and computational chemistry. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02658c] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Genuine, single-atom catalysis can be realized in the gas phase and probed by mass spectrometry combined with computational chemistry.
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Affiliation(s)
- Helmut Schwarz
- Institut für Chemie
- Technische Universität Berlin
- 10623 Berlin
- Germany
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123
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Guo Y, Li H, He LL, Zhao DX, Gong LD, Yang ZZ. The open-cubane oxo–oxyl coupling mechanism dominates photosynthetic oxygen evolution: a comprehensive DFT investigation on O–O bond formation in the S4state. Phys Chem Chem Phys 2017; 19:13909-13923. [DOI: 10.1039/c7cp01617d] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
How is O2created in nature? Comprehensive DFT investigations determine the dominance of the open-cubane oxo–oxyl coupling mechanism over alternative possibilities.
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Affiliation(s)
- Yu Guo
- School of Chemistry and Chemical Engineering
- Liaoning Normal University
- Dalian 116029
- People's Republic of China
| | - Hui Li
- School of Chemistry and Chemical Engineering
- Liaoning Normal University
- Dalian 116029
- People's Republic of China
| | - Lan-Lan He
- School of Chemistry and Chemical Engineering
- Liaoning Normal University
- Dalian 116029
- People's Republic of China
| | - Dong-Xia Zhao
- School of Chemistry and Chemical Engineering
- Liaoning Normal University
- Dalian 116029
- People's Republic of China
| | - Li-Dong Gong
- School of Chemistry and Chemical Engineering
- Liaoning Normal University
- Dalian 116029
- People's Republic of China
| | - Zhong-Zhi Yang
- School of Chemistry and Chemical Engineering
- Liaoning Normal University
- Dalian 116029
- People's Republic of China
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124
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dePolo GE, Kaliakin DS, Varganov SA. Spin-Forbidden Transitions between Electronic States in the Active Site of Rubredoxin. J Phys Chem A 2016; 120:8691-8698. [DOI: 10.1021/acs.jpca.6b07717] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gwen E. dePolo
- Department of Chemistry, University of Nevada, Reno, 1664 North
Virginia Street, Reno, Nevada 89557-0216, United States
| | - Danil S. Kaliakin
- Department of Chemistry, University of Nevada, Reno, 1664 North
Virginia Street, Reno, Nevada 89557-0216, United States
| | - Sergey A. Varganov
- Department of Chemistry, University of Nevada, Reno, 1664 North
Virginia Street, Reno, Nevada 89557-0216, United States
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125
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Zhou S, Li J, Schlangen M, Schwarz H. Zum Ursprung der effizienten thermischen Chemisorption von Methan durch den heteronuklearen Metalloxidcluster [Al2
TaO5
]+. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608999] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Jilai Li
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
- Institute of Theoretical Chemistry; Jilin University; Changchun 130023 VR China
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
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126
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Zhou S, Li J, Schlangen M, Schwarz H. The Origin of the Efficient, Thermal Chemisorption of Methane by the Heteronuclear Metal‐Oxide Cluster [Al
2
TaO
5
]
+. Angew Chem Int Ed Engl 2016; 55:14867-14871. [DOI: 10.1002/anie.201608999] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 10/04/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie Technische Universität Berlin Strasse des 17. Juni 135 10623 Berlin Germany
| | - Jilai Li
- Institut für Chemie Technische Universität Berlin Strasse des 17. Juni 135 10623 Berlin Germany
- Institute of Theoretical Chemistry Jilin University Changchun 130023 P.R. China
| | - Maria Schlangen
- Institut für Chemie Technische Universität Berlin Strasse des 17. Juni 135 10623 Berlin Germany
| | - Helmut Schwarz
- Institut für Chemie Technische Universität Berlin Strasse des 17. Juni 135 10623 Berlin Germany
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127
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Müller JF, Liu Z, Nguyen VS, Stavrakou T, Harvey JN, Peeters J. The reaction of methyl peroxy and hydroxyl radicals as a major source of atmospheric methanol. Nat Commun 2016; 7:13213. [PMID: 27748363 PMCID: PMC5071643 DOI: 10.1038/ncomms13213] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 09/13/2016] [Indexed: 11/25/2022] Open
Abstract
Methyl peroxy, a key radical in tropospheric chemistry, was recently shown to react with the hydroxyl radical at an unexpectedly high rate. Here, the molecular reaction mechanisms are elucidated using high-level quantum chemical methodologies and statistical rate theory. Formation of activated methylhydrotrioxide, followed by dissociation into methoxy and hydroperoxy radicals, is found to be the main reaction pathway, whereas methylhydrotrioxide stabilization and methanol formation (from activated and stabilized methylhydrotrioxide) are viable minor channels. Criegee intermediate formation is found to be negligible. Given the theoretical uncertainties, useful constraints on the yields are provided by atmospheric methanol measurements. Using a global chemistry-transport model, we show that the only explanation for the high observed methanol abundances over remote oceans is the title reaction with an overall methanol yield of ∼30%, consistent with the theoretical estimates given their uncertainties. This makes the title reaction a major methanol source (115 Tg per year), comparable to global terrestrial emissions.
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Affiliation(s)
- Jean-François Müller
- Atmospheric Composition Department, Royal Belgian Institute for Space Aeronomy, Avenue Circulaire 3, B-1180 Brussels, Belgium
| | - Zhen Liu
- Department of Chemistry, University of Leuven, B-3001 Heverlee, Belgium
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China
| | - Vinh Son Nguyen
- Department of Chemistry, University of Leuven, B-3001 Heverlee, Belgium
| | - Trissevgeni Stavrakou
- Atmospheric Composition Department, Royal Belgian Institute for Space Aeronomy, Avenue Circulaire 3, B-1180 Brussels, Belgium
| | - Jeremy N. Harvey
- Department of Chemistry, University of Leuven, B-3001 Heverlee, Belgium
| | - Jozef Peeters
- Department of Chemistry, University of Leuven, B-3001 Heverlee, Belgium
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128
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Zhou S, Li J, Schlangen M, Schwarz H. Thermal Dehydrogenation of Methane by [ReN]
+. Angew Chem Int Ed Engl 2016; 55:14863-14866. [DOI: 10.1002/anie.201607960] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie Technische Universität Berlin Strasse des 17. Juni 135 10623 Berlin Germany
| | - Jilai Li
- Institut für Chemie Technische Universität Berlin Strasse des 17. Juni 135 10623 Berlin Germany
- Institute of Theoretical Chemistry Jilin University P.R. China
| | - Maria Schlangen
- Institut für Chemie Technische Universität Berlin Strasse des 17. Juni 135 10623 Berlin Germany
| | - Helmut Schwarz
- Institut für Chemie Technische Universität Berlin Strasse des 17. Juni 135 10623 Berlin Germany
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129
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Zhou S, Li J, Schlangen M, Schwarz H. Thermische Dehydrierung von Methan durch [ReN]+. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607960] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Jilai Li
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
- Institute of Theoretical Chemistry; Jilin University; VR China
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
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130
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Zhu B, Guan W, Yan LK, Su ZM. Two-State Reactivity Mechanism of Benzene C–C Activation by Trinuclear Titanium Hydride. J Am Chem Soc 2016; 138:11069-72. [DOI: 10.1021/jacs.6b02433] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bo Zhu
- Institute
of Functional Materials
Chemistry and Local United Engineering Lab for Power Battery, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Wei Guan
- Institute
of Functional Materials
Chemistry and Local United Engineering Lab for Power Battery, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Li-Kai Yan
- Institute
of Functional Materials
Chemistry and Local United Engineering Lab for Power Battery, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Zhong-Min Su
- Institute
of Functional Materials
Chemistry and Local United Engineering Lab for Power Battery, Faculty
of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
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131
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Sun X, Zhou S, Schlangen M, Schwarz H. Efficient Room-Temperature Methane Activation by the Closed-Shell, Metal-Free Cluster [OSiOH]+
: A Novel Mechanistic Variant. Chemistry 2016; 22:14257-63. [DOI: 10.1002/chem.201601981] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Xiaoyan Sun
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
| | - Shaodong Zhou
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
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132
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Zhou S, Li J, Schlangen M, Schwarz H. Effiziente, thermische Aktivierung von Methan durch TaN+
unter C-N-Kupplung. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606259] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Jilai Li
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
- Institute of Theoretical Chemistry; Jilin University; Changchun 130023 VR China
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
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133
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Zhou S, Li J, Schlangen M, Schwarz H. Efficient Room-Temperature Activation of Methane by TaN+
under C−N Coupling. Angew Chem Int Ed Engl 2016; 55:11678-81. [DOI: 10.1002/anie.201606259] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Jilai Li
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
- Institute of Theoretical Chemistry; Jilin University; Changchun 130023 P.R. China
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
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134
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Zhou S, Li J, Schlangen M, Schwarz H. Die Chemie von [AuO]+
/CH4
in der Gasphase: Selektive Sauerstoffatom-Übertragung auf, statt Wasserstoffatom-Abstraktion von Methan. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605259] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Jilai Li
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
- Institute of Theoretical Chemistry; Jilin University; Changchun 130023 VR China
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
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135
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Zhou S, Li J, Schlangen M, Schwarz H. The Unique Gas-Phase Chemistry of the [AuO]+
/CH4
Couple: Selective Oxygen-Atom Transfer to, Rather than Hydrogen-Atom Abstraction from, Methane. Angew Chem Int Ed Engl 2016; 55:10877-80. [DOI: 10.1002/anie.201605259] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Jilai Li
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
- Institute of Theoretical Chemistry; Jilin University; Changchun 130023 P.R. China
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 135 10623 Berlin Germany
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136
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Schwarz H, González-Navarrete P, Li J, Schlangen M, Sun X, Weiske T, Zhou S. Unexpected Mechanistic Variants in the Thermal Gas-Phase Activation of Methane. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00372] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Helmut Schwarz
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | | | - Jilai Li
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Maria Schlangen
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Xiaoyan Sun
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Thomas Weiske
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Shaodong Zhou
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
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137
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Zhou S, Li J, Schlangen M, Schwarz H. Spinabhängige, thermische Aktivierung von Methan durch den geschlossenschaligen Cluster [TaO3
]+. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601965] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Jilai Li
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
- Institute of Theoretical Chemistry; Jilin University; Changchun 130023 V.R. China
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Deutschland
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138
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Zhou S, Li J, Schlangen M, Schwarz H. Spin-Selective Thermal Activation of Methane by Closed-Shell [TaO3
]+. Angew Chem Int Ed Engl 2016; 55:7257-60. [DOI: 10.1002/anie.201601965] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 03/18/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Shaodong Zhou
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
| | - Jilai Li
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
- Institute of Theoretical Chemistry; Jilin University; Changchun 130023 P.R. China
| | - Maria Schlangen
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
| | - Helmut Schwarz
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
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139
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Radoń M, Gąssowska K, Szklarzewicz J, Broclawik E. Spin-State Energetics of Fe(III) and Ru(III) Aqua Complexes: Accurate ab Initio Calculations and Evidence for Huge Solvation Effects. J Chem Theory Comput 2016; 12:1592-605. [DOI: 10.1021/acs.jctc.5b01234] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mariusz Radoń
- Faculty
of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Kraków, Poland
| | - Katarzyna Gąssowska
- Faculty
of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Kraków, Poland
| | - Janusz Szklarzewicz
- Faculty
of Chemistry, Jagiellonian University, ul. Ingardena 3, 30-060 Kraków, Poland
| | - Ewa Broclawik
- J.
Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Kraków, Poland
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140
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Rijs NJ, González-Navarrete P, Schlangen M, Schwarz H. Penetrating the Elusive Mechanism of Copper-Mediated Fluoromethylation in the Presence of Oxygen through the Gas-Phase Reactivity of Well-Defined [LCuO](+) Complexes with Fluoromethanes (CH(4-n)Fn, n = 1-3). J Am Chem Soc 2016; 138:3125-35. [PMID: 26859159 DOI: 10.1021/jacs.5b12972] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Traveling wave ion mobility spectrometry (TWIMS) isomer separation was exploited to react the particularly well-defined ionic species [LCuO](+) (L = 1,10-phenanthroline) with the neutral fluoromethane substrates CH(4-n)Fn (n = 1-3) in the gas phase. Experimentally, the monofluoromethane substrate (n = 1) undergoes both hydrogen-atom transfer, forming the copper hydroxide complex [LCuOH](•+) and concomitantly a CH2F(•) radical, and oxygen-atom transfer, yielding the observable ionic product [LCu](+) plus the neutral oxidized substrate [C,H3,O,F]. DFT calculations reveal that the mechanism for both product channels relies on the initial C-H bond activation of the substrate. Compared to nonfluorinated methane, the addition of fluorine to the substrate assists the reactivity through a lowering of the C-H bond energy and reaction preorganization (through noncovalent interaction in the encounter complex). A two-state reactivity scenario is mandatory for the oxidation, which competitively results in the unusual fluoromethanol product, CH2FOH, or the decomposed products, CH2O and HF, with the latter channel being kinetically disfavored. Difluoromethane (n = 2) is predicted to undergo the analogous reactions at room temperature, although the reactions are less favored than those of monofluoromethane. The reaction of trifluoromethane (n = 3, fluoroform) through C-H activation is kinetically hindered under ambient conditions but might be expected to occur in the condensed phase upon heating or with further lowering of reaction barriers through templation with counterions, such as potassium. Overall, formation of CH(3-n)Fn(•) and CH(3-n)FnOH occurs under relatively gentle energetic conditions, which sheds light on their potential as reactive intermediates in fluoromethylation reactions mediated by copper in the presence of oxygen.
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Affiliation(s)
- Nicole J Rijs
- Institute of Nanotechnology, Karlsruhe Institute of Technology , Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | | | - Maria Schlangen
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 115, 10623 Berlin, Germany
| | - Helmut Schwarz
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 115, 10623 Berlin, Germany
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141
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Chang XP, Zheng Y, Cui G, Fang WH, Thiel W. Photocycloaddition reaction of atropisomeric maleimides: mechanism and selectivity. Phys Chem Chem Phys 2016; 18:24713-21. [DOI: 10.1039/c6cp04919b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
We report a density functional study on the mechanism of the [2+2] photocyclization of atropisomeric maleimides.
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Affiliation(s)
- Xue-Ping Chang
- Key Laboratory of Theoretical and Computational Photochemistry
- Ministry of Education
- College of Chemistry
- Beijing Normal University
- Beijing 100875
| | - Yiying Zheng
- Max-Planck-Institut für Kohlenforschung
- 45470 Mlheim an der Ruhr
- Germany
| | - Ganglong Cui
- Key Laboratory of Theoretical and Computational Photochemistry
- Ministry of Education
- College of Chemistry
- Beijing Normal University
- Beijing 100875
| | - Wei-Hai Fang
- Key Laboratory of Theoretical and Computational Photochemistry
- Ministry of Education
- College of Chemistry
- Beijing Normal University
- Beijing 100875
| | - Walter Thiel
- Max-Planck-Institut für Kohlenforschung
- 45470 Mlheim an der Ruhr
- Germany
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142
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Schiwek C, Meiners J, Förster M, Würtele C, Diefenbach M, Holthausen MC, Schneider S. Oxygen Reduction with a Bifunctional Iridium Dihydride Complex. Angew Chem Int Ed Engl 2015; 54:15271-5. [PMID: 26511744 DOI: 10.1002/anie.201504369] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 09/07/2015] [Indexed: 11/06/2022]
Abstract
The iridium dihydride [Ir(H)2 (HPNP)](+) (PNP=N(CH2 CH2 PtBu2 )2 ) reacts with O2 to give the unusual, square-planar iridium(III) hydroxide [Ir(OH)(PNP)](+) and water. Regeneration of the dihydride with H2 closes a quasi-catalytic synthetic oxygen-reduction reaction (ORR) cycle that can be run several times. Experimental and computational examinations are in agreement with an oxygenation mechanism via rate-limiting O2 coordination followed by H-transfer at a single metal site, facilitated by the cooperating pincer ligand. Hence, the four electrons required for the ORR are stored within the two covalent MH bonds of a mononuclear metal complex.
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Affiliation(s)
- Christoph Schiwek
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstr. 4, 37077 Göttingen (Germany)
| | - Jenni Meiners
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstr. 4, 37077 Göttingen (Germany)
| | - Moritz Förster
- Insitut für Anorganische und Analytische Chemie, Goethe-Universität, Max-von-Laue-Str. 7, 60438 Frankfurt am Main (Germany)
| | - Christian Würtele
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstr. 4, 37077 Göttingen (Germany)
| | - Martin Diefenbach
- Insitut für Anorganische und Analytische Chemie, Goethe-Universität, Max-von-Laue-Str. 7, 60438 Frankfurt am Main (Germany)
| | - Max C Holthausen
- Insitut für Anorganische und Analytische Chemie, Goethe-Universität, Max-von-Laue-Str. 7, 60438 Frankfurt am Main (Germany).
| | - Sven Schneider
- Institut für Anorganische Chemie, Georg-August-Universität, Tammannstr. 4, 37077 Göttingen (Germany).
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143
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Akturk ES, Yap GPA, Theopold KH. Dioxygen Activation by Non-Adiabatic Oxidative Addition to a Single Metal Center. Angew Chem Int Ed Engl 2015; 54:14974-7. [PMID: 26473394 PMCID: PMC4894523 DOI: 10.1002/anie.201508777] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Indexed: 11/07/2022]
Abstract
A chromium(I) dinitrogen complex reacts rapidly with O2 to form the mononuclear dioxo complex [Tp(tBu,Me)Cr(V)(O)2] (Tp(tBu,Me) = hydrotris(3-tert-butyl-5-methylpyrazolyl)borate), whereas the analogous reaction with sulfur stops at the persulfido complex [Tp(tBu,Me)Cr(III)(S2)]. The transformation of the putative peroxo intermediate [Tp(tBu,Me)Cr(III)(O2)] (S = 3/2) into [Tp(tBu,Me)Cr(V)(O)2] (S = 1/2) is spin-forbidden. The minimum-energy crossing point for the two potential energy surfaces has been identified. Although the dinuclear complex [(Tp(tBu,Me)Cr)2(μ-O)2] exists, mechanistic experiments suggest that O2 activation occurs on a single metal center, by an oxidative addition on the quartet surface followed by crossover to the doublet surface.
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Affiliation(s)
- Eser S Akturk
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
| | - Glenn P A Yap
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
| | - Klaus H Theopold
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA).
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144
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Nance J, Bowman DN, Mukherjee S, Kelley CT, Jakubikova E. Insights into the Spin-State Transitions in [Fe(tpy)2]2+: Importance of the Terpyridine Rocking Motion. Inorg Chem 2015; 54:11259-68. [DOI: 10.1021/acs.inorgchem.5b01747] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- James Nance
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - David N. Bowman
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - Sriparna Mukherjee
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - C. T. Kelley
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
| | - Elena Jakubikova
- Department of Mathematics and ‡Department of
Chemistry, North Carolina State University (NCSU), Raleigh, North Carolina 27695, United States
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145
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Schiwek C, Meiners J, Förster M, Würtele C, Diefenbach M, Holthausen MC, Schneider S. Oxygen Reduction with a Bifunctional Iridium Dihydride Complex. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504369] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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146
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Akturk ES, Yap GPA, Theopold KH. Dioxygen Activation by Non‐Adiabatic Oxidative Addition to a Single Metal Center. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201508777] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Eser S. Akturk
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
| | - Glenn P. A. Yap
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
| | - Klaus H. Theopold
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (USA)
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147
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148
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Ling L, Liu K, Li X, Li Y. General Reaction Mode of Hypervalent Iodine Trifluoromethylation Reagent: A Density Functional Theory Study. ACS Catal 2015. [DOI: 10.1021/cs501892s] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Lin Ling
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Kun Liu
- College
of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Xinqian Li
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Yuxue Li
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
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149
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Mai BK, Kim Y. The Kinetic Isotope Effect as a Probe of Spin Crossover in the CH Activation of Methane by the FeO+Cation. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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150
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Mai BK, Kim Y. The Kinetic Isotope Effect as a Probe of Spin Crossover in the CH Activation of Methane by the FeO+Cation. Angew Chem Int Ed Engl 2015; 54:3946-51. [DOI: 10.1002/anie.201411309] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 01/08/2015] [Indexed: 11/09/2022]
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