51
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Nandy A, Chu DBK, Harper DR, Duan C, Arunachalam N, Cytter Y, Kulik HJ. Large-scale comparison of 3d and 4d transition metal complexes illuminates the reduced effect of exchange on second-row spin-state energetics. Phys Chem Chem Phys 2020; 22:19326-19341. [DOI: 10.1039/d0cp02977g] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The origin of distinct 3d vs. 4d transition metal complex sensitivity to exchange is explored over a large data set.
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Affiliation(s)
- Aditya Nandy
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
- Department of Chemistry
| | - Daniel B. K. Chu
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
| | - Daniel R. Harper
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
- Department of Chemistry
| | - Chenru Duan
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
- Department of Chemistry
| | - Naveen Arunachalam
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
| | - Yael Cytter
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
| | - Heather J. Kulik
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
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52
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Fukuzumi S, Cho KB, Lee YM, Hong S, Nam W. Mechanistic dichotomies in redox reactions of mononuclear metal–oxygen intermediates. Chem Soc Rev 2020; 49:8988-9027. [DOI: 10.1039/d0cs01251c] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This review article focuses on various mechanistic dichotomies in redox reactions of metal–oxygen intermediates with the emphasis on understanding and controlling their redox reactivity from experimental and theoretical points of view.
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Affiliation(s)
- Shunichi Fukuzumi
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 03760
- Korea
- Graduate School of Science and Engineering
| | - Kyung-Bin Cho
- Department of Chemistry
- Jeonbuk National University
- Jeonju 54896
- Korea
| | - Yong-Min Lee
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 03760
- Korea
| | - Seungwoo Hong
- Department of Chemistry
- Sookmyung Women's University
- Seoul 04310
- Korea
| | - Wonwoo Nam
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 03760
- Korea
- School of Chemistry and Chemical Engineering
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53
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Comba P, Faltermeier D, Krieg S, Martin B, Rajaraman G. Spin state and reactivity of iron(iv)oxido complexes with tetradentate bispidine ligands. Dalton Trans 2020; 49:2888-2894. [DOI: 10.1039/c9dt04578c] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The iron(iv)oxido complex [(bispidine)FeIVO(Cl)]+is shown by experiment and high-level DLPNO-CCSD(T) quantum-chemical calculations to be an extremely short-lived and very reactive intermediate-spin (S= 1) species.
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Affiliation(s)
- Peter Comba
- Universität Heidelberg
- Anorganisch-Chemisches Institut
- D-69120 Heidelberg
- Germany
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR)
| | - Dieter Faltermeier
- Universität Heidelberg
- Anorganisch-Chemisches Institut
- D-69120 Heidelberg
- Germany
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR)
| | - Saskia Krieg
- Universität Heidelberg
- Anorganisch-Chemisches Institut
- D-69120 Heidelberg
- Germany
| | - Bodo Martin
- Universität Heidelberg
- Anorganisch-Chemisches Institut
- D-69120 Heidelberg
- Germany
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR)
| | - Gopalan Rajaraman
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai-400076
- India
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54
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Ard SG, Sweeny BC, McDonald DC, Viggiano AA, Shuman NS. Quantifying the Competition between Intersystem Crossing and Spin-Conserved Pathways in the Thermal Reaction of V+ + N2O. J Phys Chem A 2019; 124:30-38. [DOI: 10.1021/acs.jpca.9b09235] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shaun G. Ard
- Institute for Scientific Research, Boston College, Boston, Massachusetts 02467, United States
| | - Brendan C. Sweeny
- NRC Postdoc at Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, Albuquerque, New Mexico 87117, United States
| | - David C. McDonald
- NRC Postdoc at Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, Albuquerque, New Mexico 87117, United States
| | - Albert A. Viggiano
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, Albuquerque, New Mexico 87117, United States
| | - Nicholas S. Shuman
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland AFB, Albuquerque, New Mexico 87117, United States
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55
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Wang G, Chen W, Huang L, Liu Z, Sun X, Zheng A. Reactivity descriptors of diverse copper-oxo species on ZSM-5 zeolite towards methane activation. Catal Today 2019. [DOI: 10.1016/j.cattod.2019.05.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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56
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Fan G, Shang Z, Li R, Shafiei-Haghighi S, Peng Q, Findlater M, Xu X. Mechanism of the Iron(0)-Catalyzed Hydrosilylation of Aldehydes: A Combined DFT and Experimental Investigation. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00388] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Guilan Fan
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Zhenfeng Shang
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Ruifang Li
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Sara Shafiei-Haghighi
- Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
| | - Qian Peng
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Michael Findlater
- Department of Chemistry & Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
| | - Xiufang Xu
- Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
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57
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Kwon S, Deshlahra P, Iglesia E. Reactivity and selectivity descriptors of dioxygen activation routes on metal oxides. J Catal 2019. [DOI: 10.1016/j.jcat.2019.07.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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58
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Liu F, Yang T, Yang J, Xu E, Bajaj A, Kulik HJ. Bridging the Homogeneous-Heterogeneous Divide: Modeling Spin for Reactivity in Single Atom Catalysis. Front Chem 2019; 7:219. [PMID: 31041303 PMCID: PMC6476907 DOI: 10.3389/fchem.2019.00219] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 03/20/2019] [Indexed: 12/03/2022] Open
Abstract
Single atom catalysts (SACs) are emergent catalytic materials that have the promise of merging the scalability of heterogeneous catalysts with the high activity and atom economy of homogeneous catalysts. Computational, first-principles modeling can provide essential insight into SAC mechanism and active site configuration, where the sub-nm-scale environment can challenge even the highest-resolution experimental spectroscopic techniques. Nevertheless, the very properties that make SACs attractive in catalysis, such as localized d electrons of the isolated transition metal center, make them challenging to study with conventional computational modeling using density functional theory (DFT). For example, Fe/N-doped graphitic SACs have exhibited spin-state dependent reactivity that remains poorly understood. However, spin-state ordering in DFT is very sensitive to the nature of the functional approximation chosen. In this work, we develop accurate benchmarks from correlated wavefunction theory (WFT) for relevant octahedral complexes. We use those benchmarks to evaluate optimal DFT functional choice for predicting spin state ordering in small octahedral complexes as well as models of pyridinic and pyrrolic nitrogen environments expected in larger SACs. Using these guidelines, we determine Fe/N-doped graphene SAC model properties and reactivity as well as their sensitivities to DFT functional choice. Finally, we conclude with broad recommendations for computational modeling of open-shell transition metal single-atom catalysts.
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Affiliation(s)
- Fang Liu
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States
| | - Tzuhsiung Yang
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States
| | - Jing Yang
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States
| | - Eve Xu
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States
| | - Akash Bajaj
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States.,Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States
| | - Heather J Kulik
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States
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59
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Schaefer AW, Ehudin MA, Quist DA, Tang JA, Karlin KD, Solomon EI. Spin Interconversion of Heme-Peroxo-Copper Complexes Facilitated by Intramolecular Hydrogen-Bonding Interactions. J Am Chem Soc 2019; 141:4936-4951. [PMID: 30836005 PMCID: PMC6457345 DOI: 10.1021/jacs.9b00118] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Synthetic peroxo-bridged high-spin (HS) heme-(μ-η2:η1-O22-)-Cu(L) complexes incorporating (as part of the copper ligand) intramolecular hydrogen-bond (H-bond) capabilities and/or steric effects are herein demonstrated to affect the complex's electronic and geometric structure, notably impacting the spin state. An H-bonding interaction with the peroxo core favors a low-spin (LS) heme-(μ-η1:η1-O22-)-Cu(L) structure, resulting in a reversible temperature-dependent interconversion of spin state (5 coordinate HS to 6 coordinate LS). The LS state dominates at low temperatures, even in the absence of a strong trans-axial heme ligand. Lewis base addition inhibits the H-bond facilitated spin interconversion by competition for the H-bond donor, illustrating the precise H-bonding interaction required to induce spin-crossover (SCO). Resonance Raman spectroscopy (rR) shows that the H-bonding pendant interacts with the bridging peroxide ligand to stabilize the LS but not the HS state. The H-bond (to the Cu-bound O atom) acts to weaken the O-O bond and strengthen the Fe-O bond, exhibiting ν(M-O) and ν(O-O) values comparable to analogous known LS complexes with a strong donating trans-axial ligand, 1,5-dicyclohexylimidazole, (DCHIm)heme-(μ-η1:η1-O22-)-Cu(L). Variable-temperature (-90 to -130 °C) UV-vis and 2H NMR spectroscopies confirm the SCO process and implicate the involvement of solvent binding. Examining a case of solvent binding without SCO, thermodynamic parameters were obtained from a van't Hoff analysis, accounting for its contribution in SCO. Taken together, these data provide evidence for the H-bond group facilitating a core geometry change and allowing solvent to bind, stabilizing a LS state. The rR data, complemented by DFT analysis, reveal a stronger H-bonding interaction with the peroxo core in the LS compared to the HS complexes, which enthalpically favors the LS state. These insights enhance our fundamental understanding of secondary coordination sphere influences in metalloenzymes.
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Affiliation(s)
- Andrew W. Schaefer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Melanie A. Ehudin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - David A. Quist
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Joel A. Tang
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kenneth D. Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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60
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Schwarz H, Asmis KR. Identification of Active Sites and Structural Characterization of Reactive Ionic Intermediates by Cryogenic Ion Trap Vibrational Spectroscopy. Chemistry 2019; 25:2112-2126. [PMID: 30623993 DOI: 10.1002/chem.201805836] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/07/2019] [Indexed: 01/02/2023]
Abstract
Cryogenic ion trap vibrational spectroscopy paired with quantum chemistry currently represents the most generally applicable approach for the structural investigation of gaseous cluster ions that are not amenable to direct absorption spectroscopy. Here, we give an overview of the most popular variants of infrared action spectroscopy and describe the advantages of using cryogenic ion traps in combination with messenger tagging and vibrational predissociation spectroscopy. We then highlight a few recent studies that apply this technique to identify highly reactive ionic intermediates and to characterize their reactive sites. We conclude by commenting on future challenges and potential developments in the field.
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Affiliation(s)
- Helmut Schwarz
- Institut für Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Knut R Asmis
- Wilhelm-Ostwald Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstr. 2, 04103, Leipzig, Germany
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61
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Ma P, Chen H. Ligand-Dependent Multi-State Reactivity in Cobalt(III)-Catalyzed C–H Activations. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04532] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Pengchen Ma
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Hui Chen
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Photochemistry, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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62
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Nakatani N, Hada M. Can large active-space CASSCF calculation make sense to the reaction analysis of iron complex? A benchmark study of methane oxidation reaction by FeO . J Comput Chem 2019; 40:414-420. [PMID: 30351477 DOI: 10.1002/jcc.25640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 09/14/2018] [Accepted: 09/14/2018] [Indexed: 01/04/2023]
Abstract
A methane oxidation reaction by FeO+ cation was theoretically investigated based on the density functional theory (DFT) and the complete active-space self-consistent field (CASSCF) method as well as the coupled-cluster singles, doubles, and perturbative triples (CCSD(T)) to explore the active-space dependency to computational analyses in such strongly correlated reaction systems. A small active-space CASSCF(5e in 5o) calculation, which only includes five 3d orbitals of the Fe atom in the active-space, showed remarkable difference both in energy and geometry compared to those computed by the DFT and CCSD(T) methods. Interestingly, a large active-space CASSCF(17e in 17o) calculation, which includes almost all the valence orbitals gives a qualitative agreement with either the DFT or the CCSD(T) results in the first half part of the reaction, although it varies from them in the latter half part. Therefore, it is indicated that the active-space dependency is serious in some part of the reaction and the small active-space CASSCF might lead a wrong discussion. We further investigated the optimized geometry of the intermediate complex with the small and the large active-space CASSCF methods as well as the CCSD(T) method, and found that the CASSCF(5e in 5o)-optimized geometry is considerably different from the others. In consequence, a small active-space CASSCF/CASPT2 calculation does not really work for such a strongly correlated reaction system even qualitatively, and a sophisticated assessment using the large active-space CASSCF/CASPT2 method will be indispensable. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Naoki Nakatani
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa Hachioji-shi, Tokyo 192-0397, Japan
| | - Masahiko Hada
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa Hachioji-shi, Tokyo 192-0397, Japan
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63
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Gao Y, Chen Q, Leng X, Deng L. Cyclometallation reactions of a three-coordinate cobalt(i) complex bearing a nonsymmetric N-heterocyclic carbene ligand. Dalton Trans 2019; 48:9676-9683. [DOI: 10.1039/c9dt00731h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactions of a three-coordinate cobalt(i)–N-heterocyclic carbene complex with different organometallic reagents afford different cyclometallated cobalt–N-heterocyclic carbene complexes.
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Affiliation(s)
- Yafei Gao
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
| | - Qi Chen
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
| | - Xuebing Leng
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
| | - Liang Deng
- State Key Laboratory of Organometallic Chemistry
- Center for Excellence in Molecular Synthesis
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
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64
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Geng C, Weiske T, Li J, Shaik S, Schwarz H. Intrinsic Reactivity of Diatomic 3d Transition-Metal Carbides in the Thermal Activation of Methane: Striking Electronic Structure Effects. J Am Chem Soc 2018; 141:599-610. [PMID: 30520302 DOI: 10.1021/jacs.8b11739] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Mechanistic aspects of the C-H bond activation of methane by metal-carbide cations MC+ of the 3d transition-metals Sc-Zn were elucidated by NEVPT2//CASSCF quantum-chemical calculations and verified experimentally for M = Ti, V, Fe, and Cu by using Fourier transform ion-cyclotron resonance mass spectrometry. While MC+ species with M = Sc, Ti, V, Cr, Cu, and Zn activate CH4 at ambient temperature, this is prevented with carbide cations of M = Mn, Fe, and Co by high apparent barriers; NiC+ has a small apparent barrier. Hydrogen-atom transfers from methane to metal-carbide cations were found to proceed via a proton-coupled electron transfer mechanism for M = Sc-Co; wherein the doubly occupied πxz/yz-orbitals between metal and carbon at the carbon site serve as electron donors and the corresponding metal-centered vacant π*xz/yz-orbitals as electron acceptors. Classical hydrogen-atom transfer transpires only in the case of NiC+, while ZnC+ follows a mechanistic scenario, in which a formally hydridic hydrogen is transferred. CuC+ reacts by a synchronous activation of two C-H bonds. While spin density is often so crucial for the reactions of numerous MO+/CH4 couples, it is much less important for the C-H bond activation by carbide cations of the 3d transition-metals, in which one notes large changes in bond dissociation energies, spin states, number of d-electrons, and charge distributions. All these factors jointly affect both the reactivity of the metal carbides and their mechanisms of C-H bond activation.
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Affiliation(s)
- Caiyun Geng
- Institut für Chemie , Technische Universität Berlin , Straße des 17. Juni 115 , 10623 Berlin , Germany
| | - Thomas Weiske
- Institut für Chemie , Technische Universität Berlin , Straße des 17. Juni 115 , 10623 Berlin , Germany
| | - Jilai Li
- Institute of Theoretical Chemistry , Jilin University , Changchun 130023 , People's Republic of China.,Institut für Chemie , Technische Universität Berlin , Straße des 17. Juni 115 , 10623 Berlin , Germany
| | - Sason Shaik
- Institute of Chemistry , The Hebrew University of Jerusalem , 9190401 Jerusalem , Israel
| | - Helmut Schwarz
- Institut für Chemie , Technische Universität Berlin , Straße des 17. Juni 115 , 10623 Berlin , Germany
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65
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Srnec M, Navrátil R, Andris E, Jašík J, Roithová J. Experimentally Calibrated Analysis of the Electronic Structure of CuO
+
: Implications for Reactivity. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201811362] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Martin Srnec
- J. Heyrovský Institute of Physical Chemistry of the CAS, v. v. i. Dolejškova 2155/3 182 23 Prague 8 Czech Republic
| | - Rafael Navrátil
- Department of Organic Chemistry Faculty of Science Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Erik Andris
- Department of Organic Chemistry Faculty of Science Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Juraj Jašík
- Department of Organic Chemistry Faculty of Science Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Jana Roithová
- Department of Organic Chemistry Faculty of Science Charles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
- Institute for Molecules and Materials Radboud University Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
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66
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Srnec M, Navrátil R, Andris E, Jašík J, Roithová J. Experimentally Calibrated Analysis of the Electronic Structure of CuO + : Implications for Reactivity. Angew Chem Int Ed Engl 2018; 57:17053-17057. [PMID: 30427565 DOI: 10.1002/anie.201811362] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Indexed: 01/05/2023]
Abstract
The CuO+ core is a central motif of reactive intermediates in copper-catalysed oxidations occurring in nature. The high reactivity of CuO+ stems from a weak bonding between the atoms, which cannot be described by a simple classical model. To obtain the correct picture, we have investigated the acetonitrile-ligated CuO+ ion using neon-tagging photodissociation spectroscopy at 5 K. The spectra feature complex vibronic absorption progressions in NIR and visible regions. Employing Franck-Condon analyses, we derived low-lying triplet potential energy surfaces that were further correlated with multireference calculations. This provided insight into the ground and low-lying excited electronic states of the CuO+ unit and elucidated how these states are perturbed by the change in ligation. Thus, we show that the bare CuO+ ion has prevailingly a copper(I)-biradical oxygen character. Increasing the number of ligands coordinated to copper changes the CuO+ character towards the copper(II)-oxyl radical structure.
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Affiliation(s)
- Martin Srnec
- J. Heyrovský Institute of Physical Chemistry of the CAS, v. v. i., Dolejškova 2155/3, 182 23, Prague 8, Czech Republic
| | - Rafael Navrátil
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43, Prague 2, Czech Republic
| | - Erik Andris
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43, Prague 2, Czech Republic
| | - Juraj Jašík
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43, Prague 2, Czech Republic
| | - Jana Roithová
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43, Prague 2, Czech Republic.,Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525, AJ, Nijmegen, The Netherlands
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67
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Liu J, Lai J, Qi L, Liu X, Zhang L, Li Y. Theoretical Study on the Catalytic Oxidation of
p
‐Iodophenol by Horseradish Peroxidase in a Chemiluminescent System. ChemistrySelect 2018. [DOI: 10.1002/slct.201802123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jian Liu
- School of Control Science and EngineeringShandong University 17923 Jingshi Road, Jinan, Shandong, P.R. China
| | - Jiahui Lai
- School of Control Science and EngineeringShandong University 17923 Jingshi Road, Jinan, Shandong, P.R. China
| | - Liguo Qi
- Taian City Central Hospital 29 Longtan Road, Taian Shandong, P.R. China
| | - Xiumei Liu
- School of Pharmaceutical SciencesShandong University 44 Wenhua West Road Jinan, Shandong, P.R. China
| | - Lili Zhang
- School of Mechanical and Automotive EngineeringQilu University of Technology 3501 Daxue Road, Jinan Shandong, P.R. China
| | - Yibin Li
- School of Control Science and EngineeringShandong University 17923 Jingshi Road, Jinan, Shandong, P.R. China
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68
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McDonald DC, Sweeny BC, Ard SG, Melko JJ, Ruliffson JE, White MC, Viggiano AA, Shuman NS. Temperature and Isotope Dependent Kinetics of Nickel-Catalyzed Oxidation of Methane by Ozone. J Phys Chem A 2018; 122:6655-6662. [PMID: 29914263 DOI: 10.1021/acs.jpca.8b02513] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The temperature dependent kinetics of Ni+ + O3 and of NiO+ + CH4/CD4 are measured from 300 to 600 K using a selected-ion flow tube apparatus. Together, these reactions comprise a catalytic cycle converting CH4 to CH3OH. The reaction of Ni+ + O3 proceeds at the collisional limit, faster than previously reported at 300 K. The NiO+ product reacts further with O3, also at the collisional limit, yielding both higher oxides (up to NiO5+ is observed) as well as undergoing an apparent reduction back to Ni+. This apparent reduction channel is due to the oxidation channel yielding NiO2+* with sufficient energy to dissociate. 4NiO+ + CH4 (CD4) (whereas 4NiO+ refers to the quartet state of NiO+) proceeds with a rate constant of (2.6 ± 0.4) × 10-10 cm3 s-1 [(1.8 ± 0.5) × 10-10 cm3 s-1] at 300 K and a temperature dependence of ∼ T-0.7±0.3 (∼ T-1.1±0.4), producing only the 2Ni+ + 1CH3OH channel up to 600 K. Statistical modeling of the reaction based on calculated stationary points along the reaction coordinate reproduces the experimental rate constant as a function of temperature but underpredicts the kinetic isotope shift. The modeling was found to better represent the data when the crossing from quartet to doublet surface was incomplete, suggesting a possible kinetic effect in crossing from quartet to doublet surfaces. Additionally, the modeling predicts a competing 3NiOH+ + 2CH3 channel to become increasingly important at higher temperatures.
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Affiliation(s)
- David C McDonald
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base , New Mexico 87117 , United States
| | - Brendan C Sweeny
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base , New Mexico 87117 , United States
| | - Shaun G Ard
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base , New Mexico 87117 , United States
| | - Joshua J Melko
- Department of Chemistry , University of North Florida , Jacksonville , Florida 32224 , United States
| | - Jennifer E Ruliffson
- Department of Chemistry , University of North Florida , Jacksonville , Florida 32224 , United States
| | - Melanie C White
- Department of Chemistry , University of North Florida , Jacksonville , Florida 32224 , United States
| | - Albert A Viggiano
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base , New Mexico 87117 , United States
| | - Nicholas S Shuman
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base , New Mexico 87117 , United States
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69
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Cheng J, Wang L, Wang P, Deng L. High-Oxidation-State 3d Metal (Ti-Cu) Complexes with N-Heterocyclic Carbene Ligation. Chem Rev 2018; 118:9930-9987. [PMID: 30011189 DOI: 10.1021/acs.chemrev.8b00096] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
High-oxidation-state 3d metal species have found a wide range of applications in modern synthetic chemistry and materials science. They are also implicated as key reactive species in biological reactions. These applications have thus prompted explorations of their formation, structure, and properties. While the traditional wisdom regarding these species was gained mainly from complexes supported by nitrogen- and oxygen-donor ligands, recent studies with N-heterocyclic carbenes (NHCs), which are widely used for the preparation of low-oxidation-state transition metal complexes in organometallic chemistry, have led to the preparation of a large variety of isolable high-oxidation-state 3d metal complexes with NHC ligation. Since the first report in this area in the 1990s, isolable complexes of this type have been reported for titanium(IV), vanadium(IV,V), chromium(IV,V), manganese(IV,V), iron(III,IV,V), cobalt(III,IV,V), nickel(IV), and copper(II). With the aim of providing an overview of this intriguing field, this Review summarizes our current understanding of the synthetic methods, structure and spectroscopic features, reactivity, and catalytic applications of high-oxidation-state 3d metal NHC complexes of titanium to copper. In addition to this progress, factors affecting the stability and reactivity of high-oxidation-state 3d metal NHC species are also presented, as well as perspectives on future efforts.
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Affiliation(s)
- Jun Cheng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , People's Republic of China
| | - Lijun Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , People's Republic of China
| | - Peng Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , People's Republic of China
| | - Liang Deng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , People's Republic of China
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70
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Sweeny BC, Ard SG, Shuman NS, Viggiano AA. Kinetics of First-Row Transition Metal Cations (V+, Fe+, Co+) with OCS at Thermal Energies. J Phys Chem A 2018; 122:4246-4251. [DOI: 10.1021/acs.jpca.8b01841] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brendan C. Sweeny
- Space Vehicles Directorate, Air Force Research Laboratory, Kirtland Air Force Base, New Mexico 87117, United States
| | - Shaun G. Ard
- Space Vehicles Directorate, Air Force Research Laboratory, Kirtland Air Force Base, New Mexico 87117, United States
| | - Nicholas S. Shuman
- Space Vehicles Directorate, Air Force Research Laboratory, Kirtland Air Force Base, New Mexico 87117, United States
| | - Albert A. Viggiano
- Space Vehicles Directorate, Air Force Research Laboratory, Kirtland Air Force Base, New Mexico 87117, United States
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71
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Huang X, Groves JT. Oxygen Activation and Radical Transformations in Heme Proteins and Metalloporphyrins. Chem Rev 2018; 118:2491-2553. [PMID: 29286645 PMCID: PMC5855008 DOI: 10.1021/acs.chemrev.7b00373] [Citation(s) in RCA: 591] [Impact Index Per Article: 98.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Indexed: 12/20/2022]
Abstract
As a result of the adaptation of life to an aerobic environment, nature has evolved a panoply of metalloproteins for oxidative metabolism and protection against reactive oxygen species. Despite the diverse structures and functions of these proteins, they share common mechanistic grounds. An open-shell transition metal like iron or copper is employed to interact with O2 and its derived intermediates such as hydrogen peroxide to afford a variety of metal-oxygen intermediates. These reactive intermediates, including metal-superoxo, -(hydro)peroxo, and high-valent metal-oxo species, are the basis for the various biological functions of O2-utilizing metalloproteins. Collectively, these processes are called oxygen activation. Much of our understanding of the reactivity of these reactive intermediates has come from the study of heme-containing proteins and related metalloporphyrin compounds. These studies not only have deepened our understanding of various functions of heme proteins, such as O2 storage and transport, degradation of reactive oxygen species, redox signaling, and biological oxygenation, etc., but also have driven the development of bioinorganic chemistry and biomimetic catalysis. In this review, we survey the range of O2 activation processes mediated by heme proteins and model compounds with a focus on recent progress in the characterization and reactivity of important iron-oxygen intermediates. Representative reactions initiated by these reactive intermediates as well as some context from prior decades will also be presented. We will discuss the fundamental mechanistic features of these transformations and delineate the underlying structural and electronic factors that contribute to the spectrum of reactivities that has been observed in nature as well as those that have been invented using these paradigms. Given the recent developments in biocatalysis for non-natural chemistries and the renaissance of radical chemistry in organic synthesis, we envision that new enzymatic and synthetic transformations will emerge based on the radical processes mediated by metalloproteins and their synthetic analogs.
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Affiliation(s)
- Xiongyi Huang
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
- Department
of Chemistry, California Institute of Technology, Pasadena, California 91125, United States
| | - John T. Groves
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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72
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Lang SM, Miyajima K, Bernhardt TM, Mafuné F, Barnett RN, Landman U. Thermal stability of iron-sulfur clusters. Phys Chem Chem Phys 2018; 20:7781-7790. [PMID: 29504007 DOI: 10.1039/c8cp00515j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermal decomposition of free cationic iron-sulfur clusters FexSy+ (x = 0-7, y = 0-9) is investigated by collisional post-heating in the temperature range between 300 and 1000 K. With increasing temperature the preferential formation of stoichiometric FexSy+ (y = x) or near stoichiometric FexSy+ (y = x ± 1) clusters is observed. In particular, Fe4S4+ represents the most abundant product up to 600 K, Fe3S3+ and Fe3S2+ are preferably formed between 600 K and 800 K, and Fe2S2+ clearly dominates the cluster distribution above 800 K. These temperature dependent fragment distributions suggest a sequential fragmentation mechanism, which involves the loss of sulfur and iron atoms as well as FeS units, and indicate the particular stability of Fe2S2+. The potential fragmentation pathways are discussed based on first principles calculations and a mechanism involving the isomerization of the cluster prior to fragmentation is proposed. The fragmentation behavior of the iron-sulfur clusters is in marked contrast to the previously reported thermal dissociation of analogous iron-oxide clusters, which resulted in the release of O2 molecules only, without loss of metal atoms and without any tendency to form particular prominent and stable FexOy+ clusters at high temperatures.
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Affiliation(s)
- Sandra M Lang
- Institute of Surface Chemistry and Catalysis, University of Ulm, Albert-Einstein-Allee 47, 89069 Ulm, Germany.
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73
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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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74
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Danovich D, Foroutan-Nejad C, Hiberty PC, Shaik S. Nature of the Three-Electron Bond. J Phys Chem A 2018; 122:1873-1885. [PMID: 29338261 DOI: 10.1021/acs.jpca.7b11919] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We analyze the properties of 15 3-electron bonds, which include σ-3-electron-bonds, such as dihalide radical anions and di-noble gas radical cations, π-3-electron-bonds as in hydrazine radical cations, and doubly-π-(3e)-bonded species such as O2, FeO+, S2, etc. The primary analytical tool is the breathing-orbital valence-bond (BOVB) method, which enables us to quantify the charge shift resonance energy (RECS) of the three electrons, and the bond dissociation energies (De). BOVB is tested reliable against MRCI calculations. Our findings show that in all 3-electron bonds, none of the VB structures have by themselves any bonding. In fact, in each VB structure, the three electrons maintain Pauli repulsion, while the entire bonding energy arises from resonance due to the charge shift between the two or more constituent VB structures. Hence, 3e-bonds are charge shift bonds (CSBs). The CSB character is probed by calculating the Laplacian (L) of the 3e-bond. Thus, much like the CSBs in electron-pair bonds, such as F2 or the central bond in [1.1.1]propellane, here too L is positive, thus showing the excess kinetic energy of the shared density due to the Pauli repulsion in the 3-electron VB structures. The RECS values for 3-electron bonds are invariably larger than the corresponding bond energies. For the doubly-π-(3e)-bonded species, RECS is very large, exceeding 100 kcal mol-1. As such, it is fitting to conclude that σ- and π-3-electron-bonds find their natural place in the CSB family along with two-electron CSBs, with which they share identical energetic and topological characteristics. Experimental manifestations/tests of 3e-CSBs are proposed.
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Affiliation(s)
- David Danovich
- Institute of Chemistry, Hebrew University of Jerusalem , 9190401 Jerusalem, Israel
| | - Cina Foroutan-Nejad
- CEITEC - Central European Institute of Technology, Masaryk University , Kamenice 5/A4, CZ-62500 Brno, Czech Republic
| | - Philippe C Hiberty
- Laboratoire de Chimie Physique, UMR CNRS 8000, Groupe Théosim, Université de Paris-Sud , 91405 Orsay Cédex, France
| | - Sason Shaik
- Institute of Chemistry, Hebrew University of Jerusalem , 9190401 Jerusalem, Israel
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75
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Verma P, Varga Z, Truhlar DG. Hyper Open-Shell Excited Spin States of Transition-Metal Compounds: FeF2, FeF2···Ethane, and FeF2···Ethylene. J Phys Chem A 2018; 122:2563-2579. [DOI: 10.1021/acs.jpca.7b12652] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pragya Verma
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455-0431, United States
- Nanoporous Materials Genome Center, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455-0431, United States
| | - Zoltan Varga
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455-0431, United States
| | - Donald G. Truhlar
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455-0431, United States
- Nanoporous Materials Genome Center, University of Minnesota, 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455-0431, United States
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76
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Wang G, Huang L, Chen W, Zhou J, Zheng A. Rationally designing mixed Cu–(μ-O)–M (M = Cu, Ag, Zn, Au) centers over zeolite materials with high catalytic activity towards methane activation. Phys Chem Chem Phys 2018; 20:26522-26531. [DOI: 10.1039/c8cp04872j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The direct conversion of methane to methanol on [Cu(μ-O)M]2+ (M = Cu, Ag, Zn, Au) bimetal centers in ZSM-5 zeolite is investigated using periodic DFT for the first time.
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Affiliation(s)
- Guiru Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Key Laboratory of Magnetic Resonance in Biological Systems
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Ling Huang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Key Laboratory of Magnetic Resonance in Biological Systems
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Wei Chen
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Key Laboratory of Magnetic Resonance in Biological Systems
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Jian Zhou
- Shanghai Research Institute of Petrochemical Technology
- SINOPEC
- Shanghai 201208
- P. R. China
| | - Anmin Zheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Key Laboratory of Magnetic Resonance in Biological Systems
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
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77
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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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78
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Hu L, Chen H. Substrate-Dependent Two-State Reactivity in Iron-Catalyzed Alkene [2+2] Cycloaddition Reactions. J Am Chem Soc 2017; 139:15564-15567. [DOI: 10.1021/jacs.7b06086] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lianrui Hu
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Photochemistry, CAS Research/Education Center for Excellence in
Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Hui Chen
- Beijing
National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory
of Photochemistry, CAS Research/Education Center for Excellence in
Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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79
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Activation of acetonitrile by gas-phase uranium: bond structure analysis and spin–flip reaction mechanism. Theor Chem Acc 2017. [DOI: 10.1007/s00214-017-2137-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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80
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81
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Mahyuddin MH, Shiota Y, Staykov A, Yoshizawa K. Theoretical Investigation of Methane Hydroxylation over Isoelectronic [FeO]2+- and [MnO]+-Exchanged Zeolites Activated by N2O. Inorg Chem 2017; 56:10370-10380. [DOI: 10.1021/acs.inorgchem.7b01284] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Haris Mahyuddin
- Engineering Physics Research Group, Bandung Institute of Technology, Bandung 40132, Indonesia
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82
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Mallick D, Shaik S. Kinetic Isotope Effect Probes the Reactive Spin State, As Well As the Geometric Feature and Constitution of the Transition State during H-Abstraction by Heme Compound II Complexes. J Am Chem Soc 2017; 139:11451-11459. [PMID: 28737390 DOI: 10.1021/jacs.7b04247] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
What do experimentally measured kinetic isotope effects (KIEs) tell us about H-abstraction reactions with multispin-state reactivity options? Using DFT calculations with tunneling corrections for experimentally studied H-abstraction reactions of porphyrin-Compound II species (Chem.-Eur. J. 2014, 20, 14437; Angew. Chem., Int. Ed. 2008, 47, 7321) with cyclohexane, dihydroanthracene (DHA), and xanthene (Xan), we show here that KIE is a selective probe that identifies the experimentally reactive spin state. At the same time, comparison of calculated and experimental KIE values permits us to determine the structural orientation of the transition states, as well as the presence/absence of an axial ligand, and the effect of porphyrin substituents. The studied compound II (Cpd II) species involve porphine, and porphyrin ligands with different meso-substituents, TPFPP (tetrakis(pentafluorophenyl)porphyrin dianion) and TMP (tetramesitylporphyrin dianion), with and without imidazole axial ligands. The DFT calculations reveal three potential pathways: quintet and triplet σ-pathways (5Hσ and 3Hσ) that possess linear transition state (TS) structures, and a triplet π -pathway (3Hπ) having a bent TS structure. Without an axial ligand, the 5Hσ pathways for these Cpd II complexes cross below the triplet states. The axial ligand raises the barriers for the quintet and triplet σ-pathways and quenches any chances for two-state reactivity, thus proceeding via the 3Hπ pathway. All of these pathways exhibit characteristic KIE values: very large for 3Hπ (48-200), small for 5Hσ (3-9), and intermediate for 3Hσ (23-51). The calculated KIEs for (TPFPP)FeIV═O without an axial ligand reveal that 3Hσ is the only pathway having a KIE that matches the experimental values, for the reactions with DHA and Xan (Angew. Chem., Int. Ed. 2008, 47, 7321). Indeed, theory shows that tunneling significantly lowers the 3Hσ barrier rendering it the sole reactive state for the reaction. A prediction is made for the reactivity and KIE of (TMP)FeIV═O complex, and a comparison is made with the analogous nonheme complexes.
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Affiliation(s)
- Dibyendu Mallick
- Institute of Chemistry and the Lise Meitner Minerva Center for Computational Quantum Chemistry, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
| | - Sason Shaik
- Institute of Chemistry and the Lise Meitner Minerva Center for Computational Quantum Chemistry, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
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83
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Sweeny BC, Ard SG, McDonald DC, Martinez O, Viggiano AA, Shuman NS. Discrepancy Between Experimental and Theoretical Predictions of the Adiabaticity of Ti
+
+CH
3
OH. Chemistry 2017; 23:11780-11783. [DOI: 10.1002/chem.201703002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Indexed: 01/12/2023]
Affiliation(s)
- Brendan C. Sweeny
- Air Force Research Laboratory Space Vehicles Directorate Kirtland Air Force Base NM 87117 USA
| | - Shaun G. Ard
- Air Force Research Laboratory Space Vehicles Directorate Kirtland Air Force Base NM 87117 USA
| | - David C. McDonald
- Air Force Research Laboratory Space Vehicles Directorate Kirtland Air Force Base NM 87117 USA
| | - Oscar Martinez
- Air Force Research Laboratory Space Vehicles Directorate Kirtland Air Force Base NM 87117 USA
| | - Albert A. Viggiano
- Air Force Research Laboratory Space Vehicles Directorate Kirtland Air Force Base NM 87117 USA
| | - Nicholas S. Shuman
- Air Force Research Laboratory Space Vehicles Directorate Kirtland Air Force Base NM 87117 USA
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84
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Lee NY, Mandal D, Bae SH, Seo MS, Lee YM, Shaik S, Cho KB, Nam W. Structure and spin state of nonheme Fe IVO complexes depending on temperature: predictive insights from DFT calculations and experiments. Chem Sci 2017; 8:5460-5467. [PMID: 28970926 PMCID: PMC5609531 DOI: 10.1039/c7sc01738c] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 05/27/2017] [Indexed: 12/11/2022] Open
Abstract
The spin states (S = 1 and S = 2) of nonheme FeIVO intermediates are believed to play an important role in determining their chemical properties in enzymatic and biomimetic reactions. However, it is almost impossible to investigate the spin state effect of nonheme FeIVO species experimentally, since FeIVO models having the S = 1 and S = 2 spin states at the same time neither exist nor can be synthesized. However, recent synthesis of an FeIVO complex with an S = 1 spin state (triplet), [(Me3NTB)FeIVO]2+ (1), and a structurally similar FeIVO complex but with an S = 2 spin state (quintet), [(TQA)FeIVO]2+ (2), has allowed us to compare their reactivities at 233 K. In the present study, we show that structural variants control the spin-state selectivity and reactivity of nonheme FeIVO complexes. While 1 and 2 were proposed to be in an octahedral geometry based on DFT calculations and spectroscopic characterization done at 4 K, further DFT calculations show that these species may well assume a trigonal bipyramidal structure by losing one coordinated solvent ligand at 233 K. Thus, the present study demonstrates that the structure and spin state of nonheme FeIVO complexes can be different at different temperatures; therefore, the structural and/or spin state information obtained at 4 K should be carefully used at a higher temperature (e.g., 233 K). In addition to 1 and 2, [(TPA)FeIVO]2+ (3) with an S = 1 spin state, whose spin state was determined spectroscopically and theoretically at 233 K, is included in this study to compare the chemical properties of S = 1 and S = 2 FeIVO complexes. The present results add another dimension to the discussion of the reactivites of nonheme FeIVO species, in which the structural preference and spin state of nonheme FeIVO species can vary depending on temperature.
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Affiliation(s)
- Na Young Lee
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea . ;
| | - Debasish Mandal
- Institute of Chemistry , The Lise Meitner-Minerva Center for Computational Quantum Chemistry , The Hebrew University of Jerusalem , 91904 Jerusalem , Israel
| | - Seong Hee Bae
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea . ;
| | - Mi Sook Seo
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea . ;
| | - Yong-Min Lee
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea . ;
| | - Sason Shaik
- Institute of Chemistry , The Lise Meitner-Minerva Center for Computational Quantum Chemistry , The Hebrew University of Jerusalem , 91904 Jerusalem , Israel
| | - Kyung-Bin Cho
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea . ;
| | - Wonwoo Nam
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea . ;
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85
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Pattanayak S, Jasniewski AJ, Rana A, Draksharapu A, Singh KK, Weitz A, Hendrich M, Que L, Dey A, Sen Gupta S. Spectroscopic and Reactivity Comparisons of a Pair of bTAML Complexes with Fe V═O and Fe IV═O Units. Inorg Chem 2017; 56:6352-6361. [PMID: 28481521 DOI: 10.1021/acs.inorgchem.7b00448] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this report we compare the geometric and electronic structures and reactivities of [FeV(O)]- and [FeIV(O)]2- species supported by the same ancillary nonheme biuret tetraamido macrocyclic ligand (bTAML). Resonance Raman studies show that the Fe═O vibration of the [FeIV(O)]2- complex 2 is at 798 cm-1, compared to 862 cm-1 for the corresponding [FeV(O)]- species 3, a 64 cm-1 frequency difference reasonably reproduced by density functional theory calculations. These values are, respectively, the lowest and the highest frequencies observed thus far for nonheme high-valent Fe═O complexes. Extended X-ray absorption fine structure analysis of 3 reveals an Fe═O bond length of 1.59 Å, which is 0.05 Å shorter than that found in complex 2. The redox potentials of 2 and 3 are 0.44 V (measured at pH 12) and 1.19 V (measured at pH 7) versus normal hydrogen electrode, respectively, corresponding to the [FeIV(O)]2-/[FeIII(OH)]2- and [FeV(O)]-/[FeIV(O)]2- couples. Consistent with its higher potential (even after correcting for the pH difference), 3 oxidizes benzyl alcohol at pH 7 with a second-order rate constant that is 2500-fold bigger than that for 2 at pH 12. Furthermore, 2 exhibits a classical kinteic isotope effect (KIE) of 3 in the oxidation of benzyl alcohol to benzaldehyde versus a nonclassical KIE of 12 for 3, emphasizing the reactivity differences between 2 and 3.
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Affiliation(s)
- Santanu Pattanayak
- Chemical Engineering Division, CSIR-National Chemical Laboratory , Pune 411008, India
| | - Andrew J Jasniewski
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Atanu Rana
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science , Kolkata 700032, India
| | - Apparao Draksharapu
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Kundan K Singh
- Chemical Engineering Division, CSIR-National Chemical Laboratory , Pune 411008, India
| | - Andrew Weitz
- Department of Chemistry, Carnegie Mellon University , 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Michael Hendrich
- Department of Chemistry, Carnegie Mellon University , 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Lawrence Que
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant Street Southeast, Minneapolis, Minnesota 55455, United States
| | - Abhishek Dey
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science , Kolkata 700032, India
| | - Sayam Sen Gupta
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata , Mohanpur, West Bengal 741246, India
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86
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Mahyuddin MH, Staykov A, Shiota Y, Miyanishi M, Yoshizawa K. Roles of Zeolite Confinement and Cu–O–Cu Angle on the Direct Conversion of Methane to Methanol by [Cu2(μ-O)]2+-Exchanged AEI, CHA, AFX, and MFI Zeolites. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00588] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- M. Haris Mahyuddin
- Institute
for Materials Chemistry and Engineering and IRCCS, Kyushu University, Fukuoka 819-0395, Japan
- Department
of Physics-Energy Engineering, Surya University, Tangerang 15810, Indonesia
| | - Aleksandar Staykov
- International
Institute for Carbon-Neutral Energy Research, Kyushu University, Fukuoka 819-0395, Japan
| | - Yoshihito Shiota
- Institute
for Materials Chemistry and Engineering and IRCCS, Kyushu University, Fukuoka 819-0395, Japan
| | - Mayuko Miyanishi
- Institute
for Materials Chemistry and Engineering and IRCCS, Kyushu University, Fukuoka 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute
for Materials Chemistry and Engineering and IRCCS, Kyushu University, Fukuoka 819-0395, Japan
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87
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Ashley DC, Jakubikova E. Ironing out the photochemical and spin-crossover behavior of Fe(II) coordination compounds with computational chemistry. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.02.005] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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88
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Quinn T, Choudhury P. Direct oxidation of methane to methanol on single-site copper-oxo species of copper porphyrin functionalized graphene: A DFT study. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.01.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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89
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Ard SG, Martinez O, Brown SA, Sawyer JC, Armentrout PB, Viggiano AA, Shuman NS. Reactivity of 4Fe +(CO) n=0-2 + O 2: oxidation of CO by O 2 at an isolated metal atom. Phys Chem Chem Phys 2017; 19:8768-8777. [PMID: 28275770 DOI: 10.1039/c6cp08703e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The kinetics of 4Fe+(CO)n=0-2 + O2 are measured under thermal conditions from 300-600 K using a selected-ion flow tube apparatus. Both the bare metal and n = 2 cations are inert to reaction over this temperature range, but 4Fe+(CO) reacts rapidly (k = 3.2 ± 0.8 × 10-10 cm3 s-1 at 300 K, 52% of the collisional rate coefficient) to form FeO+ + CO2. This is an example of the oxidation of CO by O2 occurring entirely on a single non-noble metal atom. The reaction of the bare metal reaction is known to be endothermic, such that this result is expected; however, the n = 2 reaction has highly exothermic product channels available, such that the lack of reaction is surprising in light of the n = 1 reactivity. Stationary points along all three reaction coordinates are calculated using the TPSSh hybrid functional. These surfaces show that the n = 1 reaction is an example of two-state reactivity; the reaction proceeds initially on the sextet surface over a submerged barrier to a structure with an O-O bond distance longer than that in O2, but must cross to the quartet surface in order to proceed over a second submerged barrier to rearrange to form CO2. The n = 2 reaction does not proceed because, on all spin surfaces, the transition state corresponding to O-O separation is at higher energy than the separated reactants. The difference between the n = 1 and n = 2 reactions is not a result of steric effects, but rather because the O2 is more strongly bound to Fe in the entrance well of the n = 1 case, and that energy is available to overcome the rate-limiting barrier to O-O cleavage. Experimental verification of some of these details are provided by guided ion beam tandem mass spectrometry results. The kinetic energy dependence of the n = 1 reaction shows evidence for a curve crossing and yields relevant thermochemistry for competing reaction channels.
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Affiliation(s)
- Shaun G Ard
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
| | - Oscar Martinez
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
| | - Steven A Brown
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
| | - Jordan C Sawyer
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
| | - P B Armentrout
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Albert A Viggiano
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
| | - Nicholas S Shuman
- Air Force Research Laboratory, Space Vehicles Directorate, Kirtland Air Force Base, NM 87117, USA.
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90
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Elwell CE, Gagnon NL, Neisen BD, Dhar D, Spaeth AD, Yee GM, Tolman WB. Copper-Oxygen Complexes Revisited: Structures, Spectroscopy, and Reactivity. Chem Rev 2017; 117:2059-2107. [PMID: 28103018 PMCID: PMC5963733 DOI: 10.1021/acs.chemrev.6b00636] [Citation(s) in RCA: 445] [Impact Index Per Article: 63.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A longstanding research goal has been to understand the nature and role of copper-oxygen intermediates within copper-containing enzymes and abiological catalysts. Synthetic chemistry has played a pivotal role in highlighting the viability of proposed intermediates and expanding the library of known copper-oxygen cores. In addition to the number of new complexes that have been synthesized since the previous reviews on this topic in this journal (Mirica, L. M.; Ottenwaelder, X.; Stack, T. D. P. Chem. Rev. 2004, 104, 1013-1046 and Lewis, E. A.; Tolman, W. B. Chem. Rev. 2004, 104, 1047-1076), the field has seen significant expansion in the (1) range of cores synthesized and characterized, (2) amount of mechanistic work performed, particularly in the area of organic substrate oxidation, and (3) use of computational methods for both the corroboration and prediction of proposed intermediates. The scope of this review has been limited to well-characterized examples of copper-oxygen species but seeks to provide a thorough picture of the spectroscopic characteristics and reactivity trends of the copper-oxygen cores discussed.
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Affiliation(s)
- Courtney E Elwell
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Nicole L Gagnon
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Benjamin D Neisen
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Debanjan Dhar
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Andrew D Spaeth
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Gereon M Yee
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - William B Tolman
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
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91
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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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92
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Kaur N, Kumari I, Gupta S, Goel N. Spin Inversion Phenomenon and Two-State Reactivity Mechanism for Direct Benzene Hydroxylation by V4O10 Cluster. J Phys Chem A 2016; 120:9588-9597. [PMID: 27933914 DOI: 10.1021/acs.jpca.6b08666] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Navjot Kaur
- Department
of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Indu Kumari
- Department
of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Shuchi Gupta
- University
Institute of Engineering and Technology, Panjab University, Chandigarh, 160014, India
| | - Neetu Goel
- Department
of Chemistry, Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
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93
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Mahyuddin MH, Staykov A, Shiota Y, Yoshizawa K. Direct Conversion of Methane to Methanol by Metal-Exchanged ZSM-5 Zeolite (Metal = Fe, Co, Ni, Cu). ACS Catal 2016. [DOI: 10.1021/acscatal.6b01721] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Haris Mahyuddin
- Institute for Materials
Chemistry and Engineering and IRCCS, Kyushu University, Fukuoka 819-0395, Japan
- Department
of Physics-Energy Engineering, Surya University, Tangerang 15810, Indonesia
| | - Aleksandar Staykov
- International Institute for Carbon-Neutral
Energy Research, Kyushu University, Fukuoka 819-0395, Japan
| | - Yoshihito Shiota
- Institute for Materials
Chemistry and Engineering and IRCCS, Kyushu University, Fukuoka 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials
Chemistry and Engineering and IRCCS, Kyushu University, Fukuoka 819-0395, Japan
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94
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Silva TC, de Almeida KJ, dos Santos Pires M, de Castro AA, Gonçalves MA, da Cunha EFF, Ramalho TC. Theoretical structural and electronic analyses with emphasis on the reactivity of iron oxide prototypes in methane C–H bond activation. REACTION KINETICS MECHANISMS AND CATALYSIS 2016. [DOI: 10.1007/s11144-016-1103-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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95
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Jiang YY, Jiang JL, Fu Y. Mechanism of Vanadium-Catalyzed Deoxydehydration of Vicinal Diols: Spin-Crossover-Involved Processes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00602] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuan-Ye Jiang
- Hefei
National Laboratory for Physical Sciences at the Microscale, iChEM,
CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key
Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei 230026, People’s Republic of China
- School
of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, People’s Republic of China
| | - Ju-Long Jiang
- Hefei
National Laboratory for Physical Sciences at the Microscale, iChEM,
CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key
Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Yao Fu
- Hefei
National Laboratory for Physical Sciences at the Microscale, iChEM,
CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key
Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, Hefei 230026, People’s Republic of China
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96
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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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97
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Vaucher AC, Reiher M. Molecular Propensity as a Driver for Explorative Reactivity Studies. J Chem Inf Model 2016; 56:1470-8. [DOI: 10.1021/acs.jcim.6b00264] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Alain C. Vaucher
- ETH Zürich, Laboratorium für
Physikalische Chemie, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
| | - Markus Reiher
- ETH Zürich, Laboratorium für
Physikalische Chemie, Vladimir-Prelog-Weg 2, CH-8093 Zürich, Switzerland
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98
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Watanabe KJ, Nakatani N, Nakayama A, Higashi M, Hasegawa JY. Spin-Blocking Effect in CO and H2 Binding Reactions to Molybdenocene and Tungstenocene: A Theoretical Study on the Reaction Mechanism via the Minimum Energy Intersystem Crossing Point. Inorg Chem 2016; 55:8082-90. [DOI: 10.1021/acs.inorgchem.6b01187] [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)
- K-jiro Watanabe
- Institute for Catalysis, Hokkaido University, N21 W10 Kita-ku, Sapporo, Hokkaido 001-0021, Japan
- Department of Chemistry, Biology and Marine Science,
Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
| | - Naoki Nakatani
- Institute for Catalysis, Hokkaido University, N21 W10 Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Akira Nakayama
- Institute for Catalysis, Hokkaido University, N21 W10 Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Masahiro Higashi
- Department of Chemistry, Biology and Marine Science,
Faculty of Science, University of the Ryukyus, 1 Senbaru, Nishihara, Okinawa 903-0213, Japan
| | - Jun-ya Hasegawa
- Institute for Catalysis, Hokkaido University, N21 W10 Kita-ku, Sapporo, Hokkaido 001-0021, Japan
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99
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Comba P, Fukuzumi S, Koke C, Martin B, Löhr AM, Straub J. A Bispidine Iron(IV)-Oxo Complex in the Entatic State. Angew Chem Int Ed Engl 2016; 55:11129-33. [PMID: 27466945 DOI: 10.1002/anie.201605099] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 06/30/2016] [Indexed: 11/10/2022]
Abstract
For a series of Fe(IV) =O complexes with tetra- and pentadentate bispidine ligands, the correlation of their redox potentials with reactivity, involving a variety of substrates for alkane hydroxylation (HAT), alkene epoxidation, and phosphine and thioether oxidation (OAT) are reported. The redox potentials span approximately 350 mV and the reaction rates over 8 orders of magnitude. From the experimental data and in comparison with published studies it emerges that electron transfer and the driving force are of major importance, and this is also supported by the DFT-based computational analysis. The striking difference of reactivity of two isomeric systems with pentadentate bispidines is found to be due to a destabilization of the S=1 ground state of one of the ferryl isomers, and this is supported by the experimentally determined redox potentials and published stability constants with a series of first-row transition metal ions with these two isomeric ligands.
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Affiliation(s)
- Peter Comba
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany.
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul, 120-750, Korea. .,Faculty of Science and Engineering, Meijo University, Nagoya, Aichi, 468-8502, Japan.
| | - Carsten Koke
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| | - Bodo Martin
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| | - Anna-Maria Löhr
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| | - Johannes Straub
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
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100
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Comba P, Fukuzumi S, Koke C, Martin B, Löhr AM, Straub J. A Bispidine Iron(IV)-Oxo Complex in the Entatic State. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605099] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Peter Comba
- Universität Heidelberg; Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270; 69120 Heidelberg Germany
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science; Ewha Womans University; Seoul 120-750 Korea
- Faculty of Science and Engineering; Meijo University; Nagoya Aichi 468-8502 Japan
| | - Carsten Koke
- Universität Heidelberg; Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270; 69120 Heidelberg Germany
| | - Bodo Martin
- Universität Heidelberg; Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270; 69120 Heidelberg Germany
| | - Anna-Maria Löhr
- Universität Heidelberg; Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270; 69120 Heidelberg Germany
| | - Johannes Straub
- Universität Heidelberg; Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270; 69120 Heidelberg Germany
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