51
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Malik DD, Chandra A, Seo MS, Lee YM, Farquhar ER, Mebs S, Dau H, Ray K, Nam W. Formation of cobalt-oxygen intermediates by dioxygen activation at a mononuclear nonheme cobalt(ii) center. Dalton Trans 2021; 50:11889-11898. [PMID: 34373886 PMCID: PMC8499697 DOI: 10.1039/d1dt01996a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mononuclear nonheme cobalt(ii) complex, [(TMG3tren)CoII(OTf)](OTf) (1), activates dioxygen in the presence of hydrogen atom donor substrates, such as tetrahydrofuran and cyclohexene, resulting in the generation of a cobalt(ii)-alkylperoxide intermediate (2), which then converts to the previously reported cobalt(iv)-oxo complex, [(TMG3tren)CoIV(O)]2+-(Sc(OTf)3)n (3), in >90% yield upon addition of a redox-inactive metal ion, Sc(OTf)3. Intermediates 2 and 3 represent the cobalt analogues of the proposed iron(ii)-alkylperoxide precursor that converts to an iron(iv)-oxo intermediate via O-O bond heterolysis in pterin-dependent nonheme iron oxygenases. In reactivity studies, 2 shows an amphoteric reactivity in electrophilic and nucleophilic reactions, whereas 3 is an electrophilic oxidant. To the best of our knowledge, the present study reports the first example showing the generation of cobalt-oxygen intermediates by activating dioxygen at a cobalt(ii) center and the reactivities of the cobalt-oxygen intermediates in oxidation reaction.
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Affiliation(s)
- Deesha D Malik
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.
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52
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Li Y, Wang N, Lei H, Li X, Zheng H, Wang H, Zhang W, Cao R. Bioinspired N4-metallomacrocycles for electrocatalytic oxygen reduction reaction. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213996] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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53
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Wu F, Deraedt C, Cornaton Y, Ruhlmann L, Karmazin L, Bailly C, Kyritsakas N, Le Breton N, Choua S, Djukic JP. Fate of Cobaltacycles in Cp*Co-Mediated C–H Bond Functionalization Catalysis: Cobaltacycles May Collapse upon Oxidation via Co(IV) Species. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fule Wu
- Laboratoire de Chimie et Systémique Organométalliques, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Christophe Deraedt
- Laboratoire de Chimie et Systémique Organométalliques, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Yann Cornaton
- Laboratoire de Chimie et Systémique Organométalliques, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Laurent Ruhlmann
- Laboratoire d’Electrochimie et Chimie Physique du Corps Solide, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Lydia Karmazin
- Service de Radiocristallographie Fédération de Chimie Le Bel−FR2010 BP 296R8, 1 rue Blaise Pascal, F-67008 Strasbourg Cedex, France
| | - Corinne Bailly
- Service de Radiocristallographie Fédération de Chimie Le Bel−FR2010 BP 296R8, 1 rue Blaise Pascal, F-67008 Strasbourg Cedex, France
| | - Nathalie Kyritsakas
- Service de Radiocristallographie Fédération de Chimie Le Bel−FR2010 BP 296R8, 1 rue Blaise Pascal, F-67008 Strasbourg Cedex, France
| | - Nolwenn Le Breton
- Laboratoire Propriétés Optiques et Magnétiques des Architectures Moléculaires, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Sylvie Choua
- Laboratoire Propriétés Optiques et Magnétiques des Architectures Moléculaires, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
| | - Jean-Pierre Djukic
- Laboratoire de Chimie et Systémique Organométalliques, Institut de Chimie de Strasbourg (UMR 7177) CNRS/Université de Strasbourg, 4 rue Blaise Pascal, F-67000 Strasbourg, France
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54
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Ezhov R, Ravari AK, Bury G, Smith PF, Pushkar Y. Do multinuclear 3d metal catalysts achieve O-O bond formation via radical coupling or via water nucleophilic attack? WNA leads the way in [Co 4O 4] n. CHEM CATALYSIS 2021; 1:407-422. [PMID: 37378353 PMCID: PMC10296785 DOI: 10.1016/j.checat.2021.03.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Catalytic water oxidation is a required process for clean energy production based on the concept of artificial photosynthesis. Here, we provide in situ spectroscopic and computational analysis for the closest known photosystem II analog, [Co4O4]n+ ([Co4O4Py4Ac4]0, Py = pyridine and Ac = CH3COO-), which catalyzes electrochemical water oxidation. In situ extended X-ray absorption fine structure detects an ultrashort, CoIV=O (~1.67 Å) moiety, a crucial intermediate for O-O bond formation. Density function theory analyses show that the intermediate has two CoIV centers and a CoIV=O unit of strong radicaloid character sufficient to support a CoIV=O + H2O = Co-OOH + H+ transition, where the carboxyl ligand accepts the proton and the bridging oxygen stabilizes the peroxide via hydrogen bonding. The proposed water nucleophilic attack mechanism accounts for all prior spectroscopic evidence on the Co4O44+ core. Our results are important for the design and development of efficient water oxidation catalysts, which contribute to the ultimate goal of clean energy from artificial photosynthesis.
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Affiliation(s)
- Roman Ezhov
- Department of Physics and Astronomy, Purdue University, West Lafayette, IN 47907, USA
| | | | - Gabriel Bury
- Department of Physics and Astronomy, Purdue University, West Lafayette, IN 47907, USA
| | - Paul F. Smith
- Department of Chemistry, Valparaiso University, Valparaiso, IN 46383, USA
| | - Yulia Pushkar
- Department of Physics and Astronomy, Purdue University, West Lafayette, IN 47907, USA
- Lead contact
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55
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Chandra A, Ansari M, Monte‐Pérez I, Kundu S, Rajaraman G, Ray K. Ligand‐Constraint‐Induced Peroxide Activation for Electrophilic Reactivity. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anirban Chandra
- Department of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Mursaleem Ansari
- Department of Chemistry Indian Institute of Technology Bombay, Powai Mumbai Maharashtra 400 076 India
| | - Inés Monte‐Pérez
- Department of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Subrata Kundu
- Department of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Gopalan Rajaraman
- Department of Chemistry Indian Institute of Technology Bombay, Powai Mumbai Maharashtra 400 076 India
| | - Kallol Ray
- Department of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Strasse 2 12489 Berlin Germany
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56
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Chandra A, Ansari M, Monte-Pérez I, Kundu S, Rajaraman G, Ray K. Ligand-Constraint-Induced Peroxide Activation for Electrophilic Reactivity. Angew Chem Int Ed Engl 2021; 60:14954-14959. [PMID: 33843113 PMCID: PMC8252416 DOI: 10.1002/anie.202100438] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/26/2021] [Indexed: 12/16/2022]
Abstract
μ‐1,2‐peroxo‐bridged diiron(III) intermediates P are proposed as reactive intermediates in various biological oxidation reactions. In sMMO, P acts as an electrophile, and performs hydrogen atom and oxygen atom transfers to electron‐rich substrates. In cyanobacterial ADO, however, P is postulated to react by nucleophilic attack on electrophilic carbon atoms. In biomimetic studies, the ability of μ‐1,2‐peroxo‐bridged dimetal complexes of Fe, Co, Ni and Cu to act as nucleophiles that effect deformylation of aldehydes is documented. By performing reactivity and theoretical studies on an end‐on μ‐1,2‐peroxodicobalt(III) complex 1 involving a non‐heme ligand system, L1, supported on a Sn6O6 stannoxane core, we now show that a peroxo‐bridged dimetal complex can also be a reactive electrophile. The observed electrophilic chemistry, which is induced by the constraints provided by the Sn6O6 core, represents a new domain for metal−peroxide reactivity.
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Affiliation(s)
- Anirban Chandra
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Mursaleem Ansari
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, 400 076, India
| | - Inés Monte-Pérez
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Subrata Kundu
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Gopalan Rajaraman
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, Maharashtra, 400 076, India
| | - Kallol Ray
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
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57
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Guo M, Lee YM, Fukuzumi S, Nam W. Biomimetic metal-oxidant adducts as active oxidants in oxidation reactions. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213807] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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58
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Wang J, Meng X, Xie W, Zhang X, Fan Y, Wang M. Two biologically inspired tetranuclear nickel(II) catalysts: effect of the geometry of Ni 4 core on electrocatalytic water oxidation. J Biol Inorg Chem 2021; 26:205-216. [PMID: 33544224 DOI: 10.1007/s00775-020-01846-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 12/16/2020] [Indexed: 10/22/2022]
Abstract
Two biologically inspired tetranuclear nickel complexes [Ni4(L-H)4(CH3COO)3]·Cl (1) and [Ni4(L-H)4(CH3COO)4]·2CH3OH (2) (L = di(pyridin-2-yl)methanediol) have been synthesized and investigated by a combination of X-ray crystallography, PXRD, electrochemistry, in-situ UV-Vis spectroelectrochemistry and DLS. Both of the two complexes feature a core composed of four Ni(II) ions with the same peripheral ligation provided by the anionic di(pyridin-2-yl)methanediol and MeCOO- ligands. Whereas, complex 1 possesses one distorted cubane-like [Ni4(µ3-O)4] core, while 2 has one extended butterfly-like [Ni4(µ3-O)2] core. The homogeneous electrocatalytic reactivity of the two water-soluble complexes for water oxidation have been thoroughly studied, which demonstrates that both of them can efficiently electrocatalyze water oxidation with high stability under alkaline conditions, at relatively low over-potentials (η) of 420-790 mV for 1 and 390-780 mV for 2, both in the pH range of 7.67-12.32, with the high TOF of about 139 s-1 (1) and 69 s-1 (2) at pH = 12.32, respectively. By a series of comparative experiments for complexes 1 and 2, we proposed that their crystal geometries play an important role in their electrocatalytic reactivity for water oxidation. We verified that biomimetic cubane geometry could promote OER catalysis with two very similar compounds for the first time. Compared with 2, the biomimetic cubane topology of 1 could promote OER catalysis by facilitating efficient charge delocalization and electron-transfer.
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Affiliation(s)
- Jinmiao Wang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 26610, Shandong, China
| | - Xiangmin Meng
- Shandong Provincial Key Laboratory of Biochemical Engineering, College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, Qingdao, 266042, Shandong, China
| | - Wangjing Xie
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 26610, Shandong, China
| | - Xia Zhang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 26610, Shandong, China
| | - Yuhua Fan
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 26610, Shandong, China.
| | - Mei Wang
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 26610, Shandong, China.
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59
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Lv B, Li X, Guo K, Ma J, Wang Y, Lei H, Wang F, Jin X, Zhang Q, Zhang W, Long R, Xiong Y, Apfel UP, Cao R. Controlling Oxygen Reduction Selectivity through Steric Effects: Electrocatalytic Two-Electron and Four-Electron Oxygen Reduction with Cobalt Porphyrin Atropisomers. Angew Chem Int Ed Engl 2021; 60:12742-12746. [PMID: 33742485 DOI: 10.1002/anie.202102523] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Indexed: 01/26/2023]
Abstract
Achieving a selective 2 e- or 4 e- oxygen reduction reaction (ORR) is critical but challenging. Herein, we report controlling ORR selectivity of Co porphyrins by tuning only steric effects. We designed Co porphyrin 1 with meso-phenyls each bearing a bulky ortho-amido group. Due to the resulted steric hinderance, 1 has four atropisomers with similar electronic structures but dissimilar steric effects. Isomers αβαβ and αααα catalyze ORR with n=2.10 and 3.75 (n is the electron number transferred per O2 ), respectively, but ααββ and αααβ show poor selectivity with n=2.89-3.10. Isomer αβαβ catalyzes 2 e- ORR by preventing a bimolecular O2 activation path, while αααα improves 4 e- ORR selectivity by improving O2 binding at its pocket, a feature confirmed by spectroscopy methods, including O K-edge near-edge X-ray absorption fine structure. This work represents an unparalleled example to improve 2 e- and 4 e- ORR by tuning only steric effects without changing molecular and electronic structures.
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Affiliation(s)
- Bin Lv
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Xialiang Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Kai Guo
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Jun Ma
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovative Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yanzhi Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Haitao Lei
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Fang Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Xiaotong Jin
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Qingxin Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Ran Long
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovative Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yujie Xiong
- Hefei National Laboratory for Physical Sciences at the Microscale, Collaborative Innovative Center of Chemistry for Energy Materials (iChEM), School of Chemistry and Materials Science, National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Ulf-Peter Apfel
- Ruhr-Universität Bochum, Fakultät für Chemie und Biochemie, Anorganische Chemie I, Universitätsstrasse 150, 44801, Bochum, Germany.,Fraunhofer UMSICHT, Osterfelder Strasse 3, 46047, Oberhausen, Germany
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
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60
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Lv B, Li X, Guo K, Ma J, Wang Y, Lei H, Wang F, Jin X, Zhang Q, Zhang W, Long R, Xiong Y, Apfel U, Cao R. Controlling Oxygen Reduction Selectivity through Steric Effects: Electrocatalytic Two‐Electron and Four‐Electron Oxygen Reduction with Cobalt Porphyrin Atropisomers. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102523] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Bin Lv
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710119 China
| | - Xialiang Li
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710119 China
| | - Kai Guo
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710119 China
| | - Jun Ma
- Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovative Center of Chemistry for Energy Materials (iChEM) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 China
| | - Yanzhi Wang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710119 China
| | - Haitao Lei
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710119 China
| | - Fang Wang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710119 China
| | - Xiaotong Jin
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710119 China
| | - Qingxin Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710119 China
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710119 China
| | - Ran Long
- Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovative Center of Chemistry for Energy Materials (iChEM) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 China
| | - Yujie Xiong
- Hefei National Laboratory for Physical Sciences at the Microscale Collaborative Innovative Center of Chemistry for Energy Materials (iChEM) School of Chemistry and Materials Science National Synchrotron Radiation Laboratory University of Science and Technology of China Hefei Anhui 230026 China
| | - Ulf‐Peter Apfel
- Ruhr-Universität Bochum Fakultät für Chemie und Biochemie, Anorganische Chemie I Universitätsstrasse 150 44801 Bochum Germany
- Fraunhofer UMSICHT Osterfelder Strasse 3 46047 Oberhausen Germany
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an 710119 China
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61
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Møller MS, Kongsted J, McKenzie CJ. Preparation of organocobalt(iii) complexes via O 2 activation. Dalton Trans 2021; 50:4819-4829. [PMID: 33877179 DOI: 10.1039/d1dt00563d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The coupling of selective C-H activation with O2 activation is an important goal for organic synthesis. New experimental and computational results, along with the results from experimental work accumulated over many decades, now unequivocally link O2 activation with C-H activation by the classic Co(salen) complexes. A common holistic mechanistic framework can rationalise the formation of ostensibly diverse peroxo, superoxo, organo and alkoxide complexes of CoIII(salen). DFT calculations show that cobalt(iii)superoxo, dicobalt(iii)peroxo and cobalt(iii)hydroperoxo complexes are all viable intermediates as participants in hydrogen atom transfer reactions, whereas a Co(iv)oxo intermediate is unlikely. The reaction conditions will determine the pathway followed and all pathways are initiated through the initial formation of a superoxo complex, CoIII(salen)(O2˙)(MeOH) (EPR: g = 2.025, A = 19 G). Organo and alkoxide ligands are derived from solvent media and the trends in reactivity reveal that combination of the pKa and BDE of the C-H of the respective solvent substrates are important. These data explain why landmark, structurally characterized, μ2-η1,η2-peroxide and η1-superoxide Co(salen)-O2 adducts were predominantly isolated from solvents with high C-H pKa values (DMSO, DMF, DMA).
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Affiliation(s)
- Mads Sondrup Møller
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark.
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62
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Schneider JE, Goetz MK, Anderson JS. Statistical analysis of C-H activation by oxo complexes supports diverse thermodynamic control over reactivity. Chem Sci 2021; 12:4173-4183. [PMID: 34163690 PMCID: PMC8179456 DOI: 10.1039/d0sc06058e] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 01/28/2021] [Indexed: 01/29/2023] Open
Abstract
Transition metal oxo species are key intermediates for the activation of strong C-H bonds. As such, there has been interest in understanding which structural or electronic parameters of metal oxo complexes determine their reactivity. Factors such as ground state thermodynamics, spin state, steric environment, oxygen radical character, and asynchronicity have all been cited as key contributors, yet there is no consensus on when each of these parameters is significant or the relative magnitude of their effects. Herein, we present a thorough statistical analysis of parameters that have been proposed to influence transition metal oxo mediated C-H activation. We used density functional theory (DFT) to compute parameters for transition metal oxo complexes and analyzed their ability to explain and predict an extensive data set of experimentally determined reaction barriers. We found that, in general, only thermodynamic parameters play a statistically significant role. Notably, however, there are independent and significant contributions from the oxidation potential and basicity of the oxo complexes which suggest a more complicated thermodynamic picture than what has been shown previously.
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Affiliation(s)
| | - McKenna K Goetz
- Department of Chemistry, University of Chicago Chicago IL 60637 USA
| | - John S Anderson
- Department of Chemistry, University of Chicago Chicago IL 60637 USA
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63
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Li J, Triana CA, Wan W, Adiyeri Saseendran DP, Zhao Y, Balaghi SE, Heidari S, Patzke GR. Molecular and heterogeneous water oxidation catalysts: recent progress and joint perspectives. Chem Soc Rev 2021; 50:2444-2485. [DOI: 10.1039/d0cs00978d] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The recent synthetic and mechanistic progress in molecular and heterogeneous water oxidation catalysts highlights the new, overarching strategies for knowledge transfer and unifying design concepts.
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Affiliation(s)
- J. Li
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - C. A. Triana
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - W. Wan
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | | | - Y. Zhao
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - S. E. Balaghi
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - S. Heidari
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
| | - G. R. Patzke
- Department of Chemistry
- University of Zurich
- CH-8057 Zurich
- Switzerland
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64
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Li L, Beckers H, Stüker T, Lindič T, Schlöder T, Andrae D, Riedel S. Molecular oxofluorides OMFn of nickel, palladium and platinum: oxyl radicals with moderate ligand field inversion. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01151g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
High-valent late transition metal oxo compounds attracted attention because of their peculiar metal–oxygen bond. Their oxo ligands exhibit an electrophilic and distinct radical oxyl (O˙−) rather than the more common nucleophilic (O2−) character.
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Affiliation(s)
- Lin Li
- Freie Universität Berlin
- Institut für Chemie und Biochemie – Anorganische Chemie
- 14195 Berlin
- Germany
| | - Helmut Beckers
- Freie Universität Berlin
- Institut für Chemie und Biochemie – Anorganische Chemie
- 14195 Berlin
- Germany
| | - Tony Stüker
- Freie Universität Berlin
- Institut für Chemie und Biochemie – Anorganische Chemie
- 14195 Berlin
- Germany
| | - Tilen Lindič
- Freie Universität Berlin
- Institut für Chemie und Biochemie – Theoretische Chemie
- 14195 Berlin
- Germany
| | - Tobias Schlöder
- Karlsruher Institut für Technologie
- Institut für Nanotechnologie
- 76344 Eggenstein-Leopoldshafen
- Germany
| | - Dirk Andrae
- Freie Universität Berlin
- Institut für Chemie und Biochemie – Theoretische Chemie
- 14195 Berlin
- Germany
| | - Sebastian Riedel
- Freie Universität Berlin
- Institut für Chemie und Biochemie – Anorganische Chemie
- 14195 Berlin
- Germany
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65
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Li Y, Handunneththige S, Xiong J, Guo Y, Talipov MR, Wang D. Opening the Co III,IV2(μ-O) 2 Diamond Core by Lewis Bases Leads to Enhanced C-H Bond Cleaving Reactivity. J Am Chem Soc 2020; 142:21670-21678. [PMID: 33325694 DOI: 10.1021/jacs.0c07294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The high-valent diiron(IV) intermediate Q is the key oxidant that cleaves strong C-H bonds of methane in the catalytic cycle of soluble methane monooxygenase (sMMO). sMMO-Q was previously reported as a bis-μ-oxo FeIV2(μ-O)2 diamond core but was recently described to have an open core with a long Fe···Fe distance. We recently reported a high-valent CoIII,IV2(μ-O)2 diamond core complex (1) that is highly reactive with sp3 C-H bonds. In this work, we demonstrated that the C-H bond cleaving reactivity of 1 can be further enhanced by introducing a Lewis base X, affording faster kinetic rate constants and the ability to cleave stronger C-H bonds compared to 1. We proposed that 1 first reacts with X in a fast equilibrium to form an open core species X-CoIII-O-CoIV-O (1-X). We were able to characterize 1-X using EPR spectroscopy and DFT calculations. 1-X exhibited an S = 1/2 EPR signal distinct from that of the parent complex 1. DFT calculations showed that 1-X has an open core with the spin density heavily delocalized in the CoIV-O unit. Moreover, 1-X has a more favorable thermodynamic driving force and a smaller activation barrier than 1 to carry out C-H bond activation reactions. Notably, 1-X is at least 4 orders of magnitude more reactive than its diiron open core analogues. Our findings indicate that the diamond core isomerization is likely a practical enzymatic strategy to unmask the strong oxidizing power of sMMO-Q necessary to attack the highly inert C-H bonds of methane.
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Affiliation(s)
- Yan Li
- Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, Montana 59812, United States
| | - Suhashini Handunneththige
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003, United States
| | - Jin Xiong
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Yisong Guo
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Marat R Talipov
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003, United States
| | - Dong Wang
- Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, Montana 59812, United States
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66
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Zong Y, Guan X, Xu J, Feng Y, Mao Y, Xu L, Chu H, Wu D. Unraveling the Overlooked Involvement of High-Valent Cobalt-Oxo Species Generated from the Cobalt(II)-Activated Peroxymonosulfate Process. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:16231-16239. [PMID: 33225681 DOI: 10.1021/acs.est.0c06808] [Citation(s) in RCA: 161] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Sulfate radical (SO4•-) is widely recognized as the predominant species generated from the cobalt(II)-activated peroxymonosulfate (PMS) process. However, in this study, it was surprisingly found that methyl phenyl sulfoxide (PMSO) was readily oxidized to the corresponding sulfone (PMSO2) with a transformation ratio of ∼100% under acidic conditions, which strongly implied the generation of high-valent cobalt-oxo species [Co(IV)] instead of SO4•- in the Co(II)/PMS process. Scavenging experiments using methanol (MeOH), tert-butyl alcohol, and dimethyl sulfoxide further suggested the negligible role of SO4•- and hydroxyl radical (•OH) but favored the generation of Co(IV). By employing 18O isotope-labeling technique, the formation of Co(IV) was conclusively verified and the oxygen atom exchange reaction between Co(IV) and H2O was revealed. Density functional theory calculation determined that the formation of Co(IV) was thermodynamically favorable than that of SO4•- and •OH in the Co(II)/PMS process. The generated Co(IV) species was indicated to be highly reactive due to the existence of oxo-wall and capable of oxidizing the organic pollutant that is rather recalcitrant to SO4•- attack, for example, nitrobenzene. Additionally, the degradation intermediates of sulfamethoxazole (SMX) in the Co(II)/PMS process under acidic conditions were identified to further understand the interaction between Co(IV) and the representative contaminant. The developed kinetic model successfully simulated PMSO loss, PMSO2 production, SMX degradation, and/or PMS decomposition under varying conditions, which further supported the proposed mechanism. This study might shed new light on the Co(II)/PMS process.
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Affiliation(s)
- Yang Zong
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Xiaohong Guan
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, P. R. China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P. R. China
| | - Jun Xu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Yong Feng
- School of Environment, South China Normal University, University Town, Guangzhou 510631, China
| | - Yunfeng Mao
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Longqian Xu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Huaqiang Chu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, P. R. China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P. R. China
| | - Deli Wu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai 200092, P. R. China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P. R. China
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67
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Abstract
High-valent oxocobalt(IV) species have been invoked as key intermediates in oxidative catalysis, but investigations into the chemistry of proton-coupled redox reactions of such species have been limited. Herein, the reactivity of an established water oxidation catalyst, [Co4O4(OAc)4(py)4][PF6], toward H-atom abstraction reactions is described. Mechanistic analyses and density functional theory (DFT) calculations support a concerted proton-electron transfer (CPET) pathway in which the high energy intermediates formed in stepwise pathways are bypassed. Natural bond orbital (NBO) calculations point to cooperative donor-acceptor σ interactions at the transition state, whereby the H-atom of the substrate is transferred to an orbital delocalized over a Co3(μ3-O) fragment. The mechanistic insights provide design principles for the development of catalytic C-H activation processes mediated by a multimetallic oxo metal cluster.
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68
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Zanders D, Bačić G, Leckie D, Odegbesan O, Rawson J, Masuda JD, Devi A, Barry ST. Ein seltenes Low‐Spin‐Co
IV
‐Bis(β‐silyldiamid) mit hoher thermischer Stabilität: Sterische Erzwingung einer Dublettkonfiguration. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001518] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- David Zanders
- Chemie Anorganische Materialien Fakultät für Chemie und Biochemie Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
- Department of Chemistry Carleton University 1125 Colonel By Drive Ottawa Ontario K1S 5B6 Kanada
| | - Goran Bačić
- Department of Chemistry Carleton University 1125 Colonel By Drive Ottawa Ontario K1S 5B6 Kanada
| | - Dominique Leckie
- Department of Chemistry and Biochemistry University of Windsor 401 Sunset Avenue Windsor Ontario N9B 3P4 Kanada
| | - Oluwadamilola Odegbesan
- Department of Chemistry Carleton University 1125 Colonel By Drive Ottawa Ontario K1S 5B6 Kanada
| | - Jeremy Rawson
- Department of Chemistry and Biochemistry University of Windsor 401 Sunset Avenue Windsor Ontario N9B 3P4 Kanada
| | - Jason D. Masuda
- Department of Chemistry Saint Mary's University 923 Robie Street Halifax Nova Scotia B3H 3C3 Kanada
| | - Anjana Devi
- Chemie Anorganische Materialien Fakultät für Chemie und Biochemie Ruhr-Universität Bochum Universitätsstraße 150 44801 Bochum Deutschland
| | - Seán T. Barry
- Department of Chemistry Carleton University 1125 Colonel By Drive Ottawa Ontario K1S 5B6 Kanada
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69
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Kwon YM, Lee Y, Evenson GE, Jackson TA, Wang D. Crystal Structure and C-H Bond-Cleaving Reactivity of a Mononuclear Co IV-Dinitrate Complex. J Am Chem Soc 2020; 142:13435-13441. [PMID: 32639730 PMCID: PMC7429286 DOI: 10.1021/jacs.0c04368] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
High-valent FeIV═O intermediates with a terminal metal-oxo moiety are key oxidants in many enzymatic and synthetic C-H bond oxidation reactions. While generating stable metal-oxo species for late transition metals remains synthetically challenging, notably, a number of high-valent non-oxo-metal species of late transition metals have been recently described as strong oxidants that activate C-H bonds. In this work, we obtained an unprecedented mononuclear CoIV-dinitrate complex (2) upon one-electron oxidation of its Co(III) precursor supported by a tridentate dianionic N3 ligand. 2 was structurally characterized by X-ray crystallography, showing a square pyramidal geometry with two coordinated nitrate anions. Furthermore, characterization of 2 using combined spectroscopic and computational methods revealed that 2 is a low-spin (S = 1/2) Co(IV) species with the unpaired electron located on the cobalt dz2 orbital, which is well positioned for substrate oxidations. Indeed, while having a high thermal stability, 2 is able to cleave sp3 C-H bonds up to 87 kcal/mol to afford rate constants and kinetic isotope effects (KIEs) of 2-6 that are comparable to other high-valent metal oxidants. The ability to oxidize strong C-H bonds has yet to be observed for CoIV-O and CoIII═O species previously reported. Therefore, 2 represents the first high-valent Co(IV) species that is both structurally characterized by X-ray crystallography and capable of activating strong C-H bonds.
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Affiliation(s)
- Yubin M. Kwon
- Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, Montana 59803, United States
| | - Yuri Lee
- Department of Chemistry and Center for Environmentally Beneficial Catalysis, The University of Kansas, Kansas 66045, United States
| | - Garrett E. Evenson
- Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, Montana 59803, United States
| | - Timothy A. Jackson
- Department of Chemistry and Center for Environmentally Beneficial Catalysis, The University of Kansas, Kansas 66045, United States
| | - Dong Wang
- Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, Montana 59803, United States
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70
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Panda C, Sarkar A, Sen Gupta S. Coordination chemistry of carboxamide ‘Nx’ ligands to metal ions for bio-inspired catalysis. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2020.213314] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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71
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Zanders D, Bačić G, Leckie D, Odegbesan O, Rawson J, Masuda JD, Devi A, Barry ST. A Rare Low-Spin Co IV Bis(β-silyldiamide) with High Thermal Stability: Steric Enforcement of a Doublet Configuration. Angew Chem Int Ed Engl 2020; 59:14138-14142. [PMID: 32369235 PMCID: PMC7496428 DOI: 10.1002/anie.202001518] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 04/22/2020] [Indexed: 11/10/2022]
Abstract
Attempted preparation of a chelated CoII β-silylamide resulted in the unprecedented disproportionation to Co0 and a spirocyclic cobalt(IV) bis(β-silyldiamide): [Co[(Nt Bu)2 SiMe2 ]2 ] (1). Compound 1 exhibited a room-temperature magnetic moment of 1.8 B.M. and a solid-state axial EPR spectrum diagnostic of a rare S= 1 / 2 configuration for tetrahedral CoIV . Ab initio semicanonical coupled-cluster calculations (DLPNO-CCSD(T)) revealed the doublet state was clearly preferred (-27 kcal mol-1 ) over higher spin configurations only for the bulky tert-butyl-substituted analogue. Unlike other CoIV complexes, 1 had remarkable thermal stability, and was demonstrated to form a stable self-limiting monolayer in preliminary atomic layer deposition (ALD) surface saturation experiments. The ease of synthesis and high stability make 1 an attractive starting point to investigate otherwise inaccessible CoIV intermediates and for synthesizing new materials.
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Affiliation(s)
- David Zanders
- Inorganic Materials Chemistry, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany.,Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
| | - Goran Bačić
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
| | - Dominique Leckie
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, N9B 3P4, Canada
| | - Oluwadamilola Odegbesan
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
| | - Jeremy Rawson
- Department of Chemistry and Biochemistry, University of Windsor, 401 Sunset Avenue, Windsor, Ontario, N9B 3P4, Canada
| | - Jason D Masuda
- Department of Chemistry, Saint Mary's University, 923 Robie Street, Halifax, Nova Scotia, B3H 3C3, Canada
| | - Anjana Devi
- Inorganic Materials Chemistry, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Seán T Barry
- Department of Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, K1S 5B6, Canada
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72
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Comba P, Löhr A, Pfaff F, Ray K. Redox Potentials of High‐Valent Iron‐, Cobalt‐, and Nickel‐Oxido Complexes: Evidence for Exchange Enhanced Reactivity. Isr J Chem 2020. [DOI: 10.1002/ijch.202000038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Peter Comba
- Universität Heidelberg Anorganisch-Chemisches Institut, INF 270 D-69120 Heidelberg Germany
- Universität Heidelberg Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR) D-69120 Heidelberg Germany
| | - Anna‐Maria Löhr
- Universität Heidelberg Anorganisch-Chemisches Institut, INF 270 D-69120 Heidelberg Germany
| | - Florian Pfaff
- Department of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Strasse 2 Berlin Germany 12489
| | - Kallol Ray
- Department of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Strasse 2 Berlin Germany 12489
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73
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Rosen AS, Notestein JM, Snurr RQ. High‐Valent Metal–Oxo Species at the Nodes of Metal–Triazolate Frameworks: The Effects of Ligand Exchange and Two‐State Reactivity for C−H Bond Activation. Angew Chem Int Ed Engl 2020; 59:19494-19502. [DOI: 10.1002/anie.202004458] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Indexed: 01/18/2023]
Affiliation(s)
- Andrew S. Rosen
- Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Rd. Evanston IL 60208 USA
| | - Justin M. Notestein
- Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Rd. Evanston IL 60208 USA
| | - Randall Q. Snurr
- Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Rd. Evanston IL 60208 USA
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74
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Rosen AS, Notestein JM, Snurr RQ. High‐Valent Metal–Oxo Species at the Nodes of Metal–Triazolate Frameworks: The Effects of Ligand Exchange and Two‐State Reactivity for C−H Bond Activation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004458] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Andrew S. Rosen
- Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Rd. Evanston IL 60208 USA
| | - Justin M. Notestein
- Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Rd. Evanston IL 60208 USA
| | - Randall Q. Snurr
- Department of Chemical and Biological Engineering Northwestern University 2145 Sheridan Rd. Evanston IL 60208 USA
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75
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Sengupta D, Sandoval-Pauker C, Schueller E, Encerrado-Manriquez AM, Metta-Magaña A, Lee WY, Seshadri R, Pinter B, Fortier S. Isolation of a Bimetallic Cobalt(III) Nitride and Examination of Its Hydrogen Atom Abstraction Chemistry and Reactivity toward H 2. J Am Chem Soc 2020; 142:8233-8242. [PMID: 32279486 DOI: 10.1021/jacs.0c00291] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Room temperature photolysis of the bis(azide)cobaltate(II) complex [Na(THF)x][(ketguan)Co(N3)2] (ketguan = [(tBu2CN)C(NDipp)2]-, Dipp = 2,6-diisopropylphenyl) (3a) in THF cleanly forms the binuclear cobalt nitride Na(THF)4{[(ketguan)Co(N3)]2(μ-N)} (1). Compound 1 represents the first example of an isolable, bimetallic cobalt nitride complex, and it has been fully characterized by spectroscopic, magnetic, and computational analyses. Density functional theory supports a CoIII═N═CoIII canonical form with significant π-bonding between the cobalt centers and the nitride atom. Unlike other group 9 bridging nitride complexes, no radical character is detected at the bridging N atom of 1. Indeed, 1 is unreactive toward weak C-H donors and even cocrystallizes with a molecule of cyclohexadiene (CHD) in its crystallographic unit cell to give 1·CHD as a room temperature stable product. Notably, addition of pyridine to 1 or photolyzed solutions of [(ketguan)Co(N3)(py)]2 (4a) leads to destabilization via activation of the nitride unit, resulting in the mixed-valent Co(II)/Co(III) bridged imido species [(ketguan)Co(py)][(ketguan)Co](μ-NH)(μ-N3) (5) formed from intermolecular hydrogen atom abstraction (HAA) of strong C-H bonds (BDE ∼ 100 kcal/mol). Kinetic rate analysis of the formation of 5 in the presence of C6H12 or C6D12 gives a KIE = 2.5 ± 0.1, supportive of a HAA formation pathway. The reactivity of our system was further probed by photolyzing benzene/pyridine solutions of 4a under H2 and D2 atmospheres (150 psi), which leads to the exclusive formation of the bis(imido) complexes [(ketguan)Co(μ-NH)]2 (6) and [(ketguan)Co(μ-ND)]2 (6-D), respectively, as a result of dihydrogen activation. These results provide unique insights into the chemistry and electronic structure of late 3d metal nitrides while providing entryway into C-H activation pathways.
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Affiliation(s)
- Debabrata Sengupta
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | | | - Emily Schueller
- Materials Department and Materials Research Laboratory, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | | | - Alejandro Metta-Magaña
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Wen-Yee Lee
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
| | - Ram Seshadri
- Materials Department and Materials Research Laboratory, University of California, Santa Barbara, Santa Barbara, California 93106, United States.,Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Balazs Pinter
- Department of Chemistry, Universidad Técnica Federico Santa María, Valparaíso 2390123, Chile
| | - Skye Fortier
- Department of Chemistry and Biochemistry, University of Texas at El Paso, El Paso, Texas 79968, United States
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76
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Wu YY, Hong JC, Tsai RF, Pan HR, Huang BH, Chiang YW, Lee GH, Cheng MJ, Hsu HF. Ligand-Based Reactivity of Oxygenation and Alkylation in Cobalt Complexes Binding with (Thiolato)phosphine Derivatives. Inorg Chem 2020; 59:4650-4660. [PMID: 32186861 DOI: 10.1021/acs.inorgchem.9b03740] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In our efforts to understand the nature of metal thiolates, we have explored the chemistry of cobalt ion supported by (thiolato)phosphine ligand derivatives. Herein, we synthesized and characterized a square-planar CoII complex binding with a bidentate (thiolato)phosphine ligand, Co(PS1″)2 (1) ([PS1″]- = [P(Ph)2(C6H3-3-SiMe3-2-S)]-). The complex activates O2 to form a ligand-based oxygenation product, Co(OPS1″)2 (2) ([OPS1″]- = [PO(Ph)2(C6H3-3-SiMe3-2-S)]-). In addition, an octahedral CoIII complex with a tridentate bis(thiolato)phosphine ligand, [NEt4][Co(PS2*)2] (3) ([PS2*]2- = [P(Ph)(C6H3-3-Ph-2-S)2]2-), was obtained. Compound 3 cleaves the C-Cl bond in dichloromethane via an S-based nucleophilic attack to generate a chloromethyl thioether group. Two isomeric products, [Co(PS2*)(PSSCH2Cl*)] (4 and 4') ([PSSCH2Cl*]- = [P(Ph)(C6H3-3-Ph-2-S)(C6H3-3-Ph-2-SCH2Cl)]-), were isolated and fully characterized. Both transformations, oxygenation of a CoII-bound phosphine donor in 1 and alkylation of a CoIII-bound thiolate in 3, were monitored by spectroscopic methods. These reaction products were isolated and fully characterized. Density functional theory (DFT, the B3LYP functional) calculations were performed to understand the electronic structure of 1 as well as the pathway of its transformation to 2.
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Affiliation(s)
- Yi-Ying Wu
- Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan
| | - Jia-Cheng Hong
- Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan
| | - Ruei-Fong Tsai
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hung-Ruei Pan
- Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan
| | - Bo-Hua Huang
- Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan
| | - Yun-Wei Chiang
- Department of Chemistry and Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Gene-Hsiang Lee
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | - Mu-Jeng Cheng
- Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan
| | - Hua-Fen Hsu
- Department of Chemistry, National Cheng Kung University, Tainan 701, Taiwan
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77
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Martirez JMP, Carter EA. Noninnocent Influence of Host β-NiOOH Redox Activity on Transition-Metal Dopants’ Efficacy as Active Sites in Electrocatalytic Water Oxidation. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05092] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- John Mark P. Martirez
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544-5263, United States
| | - Emily A. Carter
- Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544-5263, United States
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78
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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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79
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Liu Y, You T, Wang HX, Tang Z, Zhou CY, Che CM. Iron- and cobalt-catalyzed C(sp3)–H bond functionalization reactions and their application in organic synthesis. Chem Soc Rev 2020; 49:5310-5358. [DOI: 10.1039/d0cs00340a] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review highlights the developments in iron and cobalt catalyzed C(sp3)–H bond functionalization reactions with emphasis on their applications in organic synthesis, i.e. natural products and pharmaceuticals synthesis and/or modification.
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Affiliation(s)
- Yungen Liu
- Department of Chemistry
- Southern University of Science and Technology
- Shenzhen
- P. R. China
| | - Tingjie You
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- Hong Kong
- P. R. China
| | - Hai-Xu Wang
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- Hong Kong
- P. R. China
| | - Zhou Tang
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- Hong Kong
- P. R. China
| | - Cong-Ying Zhou
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- Hong Kong
- P. R. China
| | - Chi-Ming Che
- Department of Chemistry
- Southern University of Science and Technology
- Shenzhen
- P. R. China
- Department of Chemistry
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80
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Li Y, Handunneththige S, Farquhar ER, Guo Y, Talipov MR, Li F, Wang D. Highly Reactive Co III,IV2(μ-O) 2 Diamond Core Complex That Cleaves C-H Bonds. J Am Chem Soc 2019; 141:20127-20136. [PMID: 31794198 DOI: 10.1021/jacs.9b09531] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The selective activation of strong sp3 C-H bonds at mild conditions is a key step in many biological and synthetic transformations and an unsolved challenge for synthetic chemists. In nature, soluble methane monooxygenase (sMMO) is one representative example of nonheme dinuclear iron-dependent enzymes that activate strong sp3 C-H bonds by a high-valent diiron(IV) intermediate Q. To date, synthetic model complexes of sMMO-Q have shown limited abilities to oxidize strong C-H bonds. In this work, we generated a high-valent CoIII,IV2(μ-O)2 complex 3 supported by a tetradentate tris(2-pyridylmethyl)amine (TPA) ligand via one-electron oxidation of its CoIII2(μ-O)2 precursor 2. Characterization of 2 and 3 using X-ray absorption spectroscopy and DFT calculations showed that both species possess a diamond core structure with a short Co···Co distance of 2.78 Å. Furthermore, 3 is an EPR active species showing an S = 1/2 signal with clearly observable hyperfine splittings originated from the coupling of the 59Co nuclear spin with the electronic spin. Importantly, 3 is a highly reactive oxidant for sp3 C-H bonds, and an oxygenation reagent. 3 has the highest rate constant (1.5 M-1 s-1 at -60 °C) for oxidizing 9,10-dihydroanthracene (DHA) compared to diamond core complexes of other first-row transition metals including Mn, Fe and Cu reported previously. Specifically, 3 is about 4-5 orders of magnitude more reactive than the diiron analogs FeIII,IV2(μ-O)2 and FeIV2(μ-O)2 supported by TPA and related ligands. These findings shed light on future development of more reactive approaches for C-H bond activation by bioinspired dicobalt complexes.
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Affiliation(s)
- Yan Li
- Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Dynamics , University of Montana , Missoula , Montana 59803 , United States
| | - Suhashini Handunneththige
- Department of Chemistry and Biochemistry , New Mexico State University , Las Cruces , New Mexico 88003 , United States
| | - Erik R Farquhar
- CWRU Center for Synchrotron Biosciences, NSLS-II , Brookhaven National Laboratory , Upton , New York 11973 , United States.,School of Medicine , Case Western Reserve University , Cleveland , Ohio 44106 , United States
| | - Yisong Guo
- Department of Chemistry , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
| | - Marat R Talipov
- Department of Chemistry and Biochemistry , New Mexico State University , Las Cruces , New Mexico 88003 , United States
| | - Feifei Li
- Department of Chemistry and Biochemistry , New Mexico State University , Las Cruces , New Mexico 88003 , United States
| | - Dong Wang
- Department of Chemistry and Biochemistry, Center for Biomolecular Structure and Dynamics , University of Montana , Missoula , Montana 59803 , United States
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81
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Liu Y, Zhou G, Zhang Z, Lei H, Yao Z, Li J, Lin J, Cao R. Significantly improved electrocatalytic oxygen reduction by an asymmetrical Pacman dinuclear cobalt(ii) porphyrin-porphyrin dyad. Chem Sci 2019; 11:87-96. [PMID: 32110360 PMCID: PMC7012046 DOI: 10.1039/c9sc05041h] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 11/03/2019] [Indexed: 11/21/2022] Open
Abstract
Asymmetrical Pacman dinuclear Co bisporphyrin shows significantly improved activity and selectivity for catalytic reduction of O2 to water in comparison with corresponding mononuclear Co porphyrins and symmetrical dinuclear Co bisporphyrins.
Pacman dinuclear CoII triphenylporphyrin-tri(pentafluorophenyl)porphyrin 1 and dinuclear CoII bis-tri(pentafluorophenyl)porphyrin 2, anchored at the two meso-positions of a benzene linker, are synthesized and examined as electrocatalysts for the oxygen reduction reaction (ORR). Both dinuclear Co bisporphyrins are more efficient and selective than corresponding mononuclear CoII tetra(pentafluorophenyl)porphyrin 3 and CoII tetraphenylporphyrin 4 for the four-electron electrocatalytic reduction of O2 to water. Significantly, although the ORR selectivities of the two dinuclear Co bisporphyrins are similar to each other, 1 outperforms 2, in terms of larger catalytic ORR currents and lower overpotentials. Electrochemical studies showed different redox behaviors of the two Co sites of 1: the CoIII/CoII reduction of the Co-TPP (TPP = triphenylporphyrin) site is well-behind that of the Co-TPFP (TPFP = tri(pentafluorophenyl)porphyrin) site by 440 mV. This difference indicated their different roles in the ORR: CoII-TPFP is likely the O2 binding and reduction site, while CoIII-TPP, which is generated by the oxidation of CoII-TPP on electrodes, may function as a Lewis acid to assist the O2 binding and activation. The positively charged CoIII-TPP will have through-space charge interactions with the negatively charged O2-adduct unit, which will reduce the activation energy barrier for the ORR. This effect of Co-TPP closely resembles that of the CuB site of metalloenzyme cytochrome c oxidase (CcO), which catalyzes the biological reduction of O2. This work represents a rare example of asymmetrical dinuclear metal catalysts, which can catalyze the 4e reduction of O2 with high selectivity and significantly improved activity.
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Affiliation(s)
- Yanju Liu
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China . .,Department of Chemistry , Renmin University of China , Beijing 100872 , China
| | - Guojun Zhou
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China .
| | - Zongyao Zhang
- Department of Chemistry , Renmin University of China , Beijing 100872 , China
| | - Haitao Lei
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China .
| | - Zhen Yao
- College of Materials Science and Optoelectronic Technology , University of Chinese Academy of Science , Beijing 101408 , China
| | - Jianfeng Li
- College of Materials Science and Optoelectronic Technology , University of Chinese Academy of Science , Beijing 101408 , China
| | - Jun Lin
- Department of Chemistry , Renmin University of China , Beijing 100872 , China
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry , Ministry of Education , School of Chemistry and Chemical Engineering , Shaanxi Normal University , Xi'an 710119 , China .
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82
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Stabilizing CuPd bimetallic alloy nanoparticles deposited on holey carbon nitride for selective hydroxylation of benzene to phenol. J Catal 2019. [DOI: 10.1016/j.jcat.2019.09.032] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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83
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Gordon JB, Vilbert AC, DiMucci IM, MacMillan SN, Lancaster KM, Moënne-Loccoz P, Goldberg DP. Activation of Dioxygen by a Mononuclear Nonheme Iron Complex: Sequential Peroxo, Oxo, and Hydroxo Intermediates. J Am Chem Soc 2019; 141:17533-17547. [PMID: 31647656 DOI: 10.1021/jacs.9b05274] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The activation of dioxygen by FeII(Me3TACN)(S2SiMe2) (1) is reported. Reaction of 1 with O2 at -135 °C in 2-MeTHF generates a thiolate-ligated (peroxo)diiron complex FeIII2(O2)(Me3TACN)2(S2SiMe2)2 (2) that was characterized by UV-vis (λmax = 300, 390, 530, 723 nm), Mössbauer (δ = 0.53, |ΔEQ| = 0.76 mm s-1), resonance Raman (RR) (ν(O-O) = 849 cm-1), and X-ray absorption (XAS) spectroscopies. Complex 2 is distinct from the outer-sphere oxidation product 1ox (UV-vis (λmax = 435, 520, 600 nm), Mössbauer (δ = 0.45, |ΔEQ| = 3.6 mm s-1), and EPR (S = 5/2, g = [6.38, 5.53, 1.99])), obtained by one-electron oxidation of 1. Cleavage of the peroxo O-O bond can be initiated either photochemically or thermally to produce a new species assigned as an FeIV(O) complex, FeIV(O)(Me3TACN)(S2SiMe2) (3), which was identified by UV-vis (λmax = 385, 460, 890 nm), Mössbauer (δ = 0.21, |ΔEQ| = 1.57 mm s-1), RR (ν(FeIV═O) = 735 cm-1), and X-ray absorption spectroscopies, as well as reactivity patterns. Reaction of 3 at low temperature with H atom donors gives a new species, FeIII(OH)(Me3TACN)(S2SiMe2) (4). Complex 4 was independently synthesized from 1 by the stoichiometric addition of a one-electron oxidant and a hydroxide source. This work provides a rare example of dioxygen activation at a mononuclear nonheme iron(II) complex that produces both FeIII-O-O-FeIII and FeIV(O) species in the same reaction with O2. It also demonstrates the feasibility of forming Fe/O2 intermediates with strongly donating sulfur ligands while avoiding immediate sulfur oxidation.
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Affiliation(s)
- Jesse B Gordon
- Department of Chemistry , The Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
| | - Avery C Vilbert
- Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell University , Ithaca , New York 14853 , United States
| | - Ida M DiMucci
- Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell University , Ithaca , New York 14853 , United States
| | - Samantha N MacMillan
- Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell University , Ithaca , New York 14853 , United States
| | - Kyle M Lancaster
- Department of Chemistry and Chemical Biology, Baker Laboratory , Cornell University , Ithaca , New York 14853 , United States
| | - Pierre Moënne-Loccoz
- Department of Chemical Physiology and Biochemistry , Oregon Health & Science University , Portland , Oregon 97239 , United States
| | - David P Goldberg
- Department of Chemistry , The Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
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84
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Budnikova Y, Bochkova O, Khrizanforov M, Nizameev I, Kholin K, Gryaznova T, Laskin A, Dudkina Y, Strekalova S, Fedorenko S, Kononov A, Mustafina A. Selective C(sp2)‐H Amination Catalyzed by High‐Valent Cobalt(III)/(IV)‐bpy Complex Immobilized on Silica Nanoparticles. ChemCatChem 2019. [DOI: 10.1002/cctc.201901391] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yulia Budnikova
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences 420088 Arbuzov str. 8 Kazan Russian Federation
| | - Olga Bochkova
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences 420088 Arbuzov str. 8 Kazan Russian Federation
| | - Mikhail Khrizanforov
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences 420088 Arbuzov str. 8 Kazan Russian Federation
| | - Irek Nizameev
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences 420088 Arbuzov str. 8 Kazan Russian Federation
| | - Kirill Kholin
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences 420088 Arbuzov str. 8 Kazan Russian Federation
| | - Tatyana Gryaznova
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences 420088 Arbuzov str. 8 Kazan Russian Federation
| | - Artem Laskin
- Kazan Federal University Kremlevskaya str. 29/1 Kazan 420008 Russian Federation
| | - Yulia Dudkina
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences 420088 Arbuzov str. 8 Kazan Russian Federation
| | - Sofia Strekalova
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences 420088 Arbuzov str. 8 Kazan Russian Federation
| | - Svetlana Fedorenko
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences 420088 Arbuzov str. 8 Kazan Russian Federation
| | - Aleksandr Kononov
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences 420088 Arbuzov str. 8 Kazan Russian Federation
| | - Asia Mustafina
- Arbuzov Institute of Organic and Physical ChemistryFRC Kazan Scientific Center, Russian Academy of Sciences 420088 Arbuzov str. 8 Kazan Russian Federation
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85
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Straub S, Domenianni LI, Lindner J, Vöhringer P. Photoinduced Dynamics of a Diazidocobalt(III) Complex Studied by Femtosecond UV-Pump/IR-to-Vis-Probe Spectroscopy. J Phys Chem B 2019; 123:7893-7904. [DOI: 10.1021/acs.jpcb.9b07210] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Steffen Straub
- Abteilung für Molekulare Physikalische Chemie, Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität, Wegelerstrasse 12, 53115 Bonn, Germany
| | - Luis I. Domenianni
- Abteilung für Molekulare Physikalische Chemie, Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität, Wegelerstrasse 12, 53115 Bonn, Germany
| | - Jörg Lindner
- Abteilung für Molekulare Physikalische Chemie, Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität, Wegelerstrasse 12, 53115 Bonn, Germany
| | - Peter Vöhringer
- Abteilung für Molekulare Physikalische Chemie, Institut für Physikalische und Theoretische Chemie, Rheinische Friedrich-Wilhelms-Universität, Wegelerstrasse 12, 53115 Bonn, Germany
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86
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Deegan MM, Peters JC. O-Functionalization of a cobalt carbonyl generates a terminal cobalt carbyne. Chem Commun (Camb) 2019; 55:9531-9534. [PMID: 31332413 DOI: 10.1039/c9cc04032c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Despite efforts toward extending multiple bonding motifs to late metal systems, examples of late transition metal carbynes remain scarce. Herein, we describe the synthesis of a series of L3Co(CO) complexes supported by a trisphosphine ligand framework, with the most reduced of these complexes being amenable to O-functionalization. This transformation provides access to the second reported example of a terminal Co-carbyne complex, in this case stabilized in a pseudotetrahedral geometry (i.e., L3Co[triple bond, length as m-dash]C-OSiR3). Its geometry makes its electronic structure suitable for comparison to structurally-related examples of terminal Co-imido and oxo species.
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Affiliation(s)
- Meaghan M Deegan
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.
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87
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Nandy A, Zhu J, Janet JP, Duan C, Getman RB, Kulik HJ. Machine Learning Accelerates the Discovery of Design Rules and Exceptions in Stable Metal–Oxo Intermediate Formation. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02165] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - Jiazhou Zhu
- Department of Chemical & Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | | | | | - Rachel B. Getman
- Department of Chemical & Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, United States
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88
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Abstract
Metal-oxyl (Mn+-O•) complexes having an oxyl radical ligand, which are electronically equivalent to well-known metal-oxo (M(n+1)+═O) complexes, are surveyed as a new category of metal-based oxidants. Detection and characterization of Mn+-O• species have been made in some cases, although proposals and characterization of the species are mostly done on the basis of density functional theory (DFT) calculations. The reactivity of Mn+-O• complexes will provide a way to achieve potentially difficult oxidative conversion of substrates. This Viewpoint will provide state-of-the-art knowledge on the Mn+-O• species in terms of the formation, characterization, and DFT-based proposals to shed light on the characteristics of the intriguing oxidatively active species.
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Affiliation(s)
- Yoshihiro Shimoyama
- Department of Chemistry, Faculty of Pure and Applied Sciences , University of Tsukuba , Tsukuba , Ibaraki 305-8571 , Japan.,Interdisciplinary Research Center for Catalytic Chemistry , National Institute of Advanced Industrial Science and Technology (AIST) , Tsukuba , Ibaraki 305-8565 , Japan
| | - Takahiko Kojima
- Department of Chemistry, Faculty of Pure and Applied Sciences , University of Tsukuba , Tsukuba , Ibaraki 305-8571 , Japan
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89
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Andris E, Navrátil R, Jašík J, Srnec M, Rodríguez M, Costas M, Roithová J. M-O Bonding Beyond the Oxo Wall: Spectroscopy and Reactivity of Cobalt(III)-Oxyl and Cobalt(III)-Oxo Complexes. Angew Chem Int Ed Engl 2019; 58:9619-9624. [PMID: 31083766 PMCID: PMC6618258 DOI: 10.1002/anie.201904546] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/13/2019] [Indexed: 01/05/2023]
Abstract
Terminal oxo complexes of late transition metals are frequently proposed reactive intermediates. However, they are scarcely known beyond Group 8. Using mass spectrometry, we prepared and characterized two such complexes: [(N4Py)CoIII (O)]+ (1) and [(N4Py)CoIV (O)]2+ (2). Infrared photodissociation spectroscopy revealed that the Co-O bond in 1 is rather strong, in accordance with its lack of chemical reactivity. On the contrary, 2 has a very weak Co-O bond characterized by a stretching frequency of ≤659 cm-1 . Accordingly, 2 can abstract hydrogen atoms from non-activated secondary alkanes. Previously, this reactivity has only been observed in the gas phase for small, coordinatively unsaturated metal complexes. Multireference ab-initio calculations suggest that 2, formally a cobalt(IV)-oxo complex, is best described as cobalt(III)-oxyl. Our results provide important data on changes to metal-oxo bonding behind the oxo wall and show that cobalt-oxo complexes are promising targets for developing highly active C-H oxidation catalysts.
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Affiliation(s)
- Erik Andris
- Department of Organic ChemistryFaculty of ScienceCharles UniversityHlavova 2030/8128 43Prague 2Czech Republic
| | - Rafael Navrátil
- Department of Organic ChemistryFaculty of ScienceCharles UniversityHlavova 2030/8128 43Prague 2Czech Republic
| | - Juraj Jašík
- Department of Organic ChemistryFaculty of ScienceCharles UniversityHlavova 2030/8128 43Prague 2Czech Republic
| | - Martin Srnec
- J. Heyrovsky Institute of Physical Chemistry of the CASv. v. i., Dolejškova 2155/31822 3Prague 8Czech Republic
| | - Mònica Rodríguez
- Departament de Quimica and Institute of Computational Chemistry and Catalysis (IQCC)University of GironaCampus MontiliviGirona17071Spain
| | - Miquel Costas
- Departament de Quimica and Institute of Computational Chemistry and Catalysis (IQCC)University of GironaCampus MontiliviGirona17071Spain
| | - Jana Roithová
- Department of Organic ChemistryFaculty of ScienceCharles UniversityHlavova 2030/8128 43Prague 2Czech Republic
- Radboud University NijmegenInstitute for Molecules and MaterialsHeyendaalseweg 1356525 AJNijmegenThe Netherlands
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90
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Andris E, Navrátil R, Jašík J, Srnec M, Rodríguez M, Costas M, Roithová J. M−O Bonding Beyond the Oxo Wall: Spectroscopy and Reactivity of Cobalt(III)‐Oxyl and Cobalt(III)‐Oxo Complexes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904546] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Erik Andris
- Department of Organic ChemistryFaculty of ScienceCharles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Rafael Navrátil
- Department of Organic ChemistryFaculty of ScienceCharles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Juraj Jašík
- Department of Organic ChemistryFaculty of ScienceCharles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
| | - Martin Srnec
- J. Heyrovsky Institute of Physical Chemistry of the CAS v. v. i., Dolejškova 2155/3 1822 3 Prague 8 Czech Republic
| | - Mònica Rodríguez
- Departament de Quimica and Institute of Computational Chemistry and Catalysis (IQCC)University of Girona Campus Montilivi Girona 17071 Spain
| | - Miquel Costas
- Departament de Quimica and Institute of Computational Chemistry and Catalysis (IQCC)University of Girona Campus Montilivi Girona 17071 Spain
| | - Jana Roithová
- Department of Organic ChemistryFaculty of ScienceCharles University Hlavova 2030/8 128 43 Prague 2 Czech Republic
- Radboud University NijmegenInstitute for Molecules and Materials Heyendaalseweg 135 6525 AJ Nijmegen The Netherlands
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91
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Ahn S, Hong M, Sundararajan M, Ess DH, Baik MH. Design and Optimization of Catalysts Based on Mechanistic Insights Derived from Quantum Chemical Reaction Modeling. Chem Rev 2019; 119:6509-6560. [DOI: 10.1021/acs.chemrev.9b00073] [Citation(s) in RCA: 85] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Seihwan Ahn
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Mannkyu Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Mahesh Sundararajan
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Daniel H. Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Mu-Hyun Baik
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
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92
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Exfoliated nanosheets of Co3O4 webbed with polyaniline nanofibers: A novel composite electrode material for enzymeless glucose sensing application. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.01.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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93
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Goetz MK, Anderson JS. Experimental Evidence for p K a-Driven Asynchronicity in C-H Activation by a Terminal Co(III)-Oxo Complex. J Am Chem Soc 2019; 141:4051-4062. [PMID: 30739450 DOI: 10.1021/jacs.8b13490] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
C-H activation by transition metal oxo complexes is a fundamental reaction in oxidative chemistry carried out by both biological and synthetic systems. This centrality has motivated efforts to understand the patterns and mechanisms of such reactivity. We have therefore thoroughly examined the C-H activation reactivity of the recently synthesized and characterized late transition metal oxo complex PhB ( tBuIm)3CoIIIO. Precise values for the p Ka and BDFEO-H of the conjugates of this complex have been experimentally determined and provide insight into the observed reactivity. The activation parameters for the reaction between this complex and 9,10-dihydroanthracene have also been measured and compared to previous literature examples. Evaluation of the rates of reaction of PhB( tBuIm)3CoIIIO with a variety of hydrogen atom donors demonstrates that the reactivity of this complex is dependent on the p Ka of the substrate of interest rather than the BDEC-H. This observation runs counter to the commonly cited reactivity paradigm for many other transition metal oxo complexes. Experimental and computational analysis of C-H activation reactions by PhB( tBuIm)3CoIIIO reveals that the transition state for these processes contains significant proton transfer character. Nevertheless, additional experiments strongly suggest that the reaction does not occur via a stepwise process, leading to the conclusion that C-H activation by this CoIII-oxo complex proceeds by a p Ka-driven "asynchronous" concerted mechanism. This result supports a new pattern of reactivity that may be applicable to other systems and could result in alternative selectivity for C-H activation reactions mediated by transition metal oxo complexes.
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Affiliation(s)
- McKenna K Goetz
- Department of Chemistry , University of Chicago , Chicago , Illinois 60637 , United States
| | - John S Anderson
- Department of Chemistry , University of Chicago , Chicago , Illinois 60637 , United States
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94
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Harmalkar SS, Narulkar DD, Butcher RJ, Deshmukh MS, Kumar Srivastava A, Mariappan M, Lama P, Dhuri SN. Dual-site aqua mononuclear nickel(II) complexes of non-heme tetradentate ligands: Synthesis, characterization and reactivity. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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95
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Sankaralingam M, Lee YM, Pineda-Galvan Y, Karmalkar DG, Seo MS, Jeon SH, Pushkar Y, Fukuzumi S, Nam W. Redox Reactivity of a Mononuclear Manganese-Oxo Complex Binding Calcium Ion and Other Redox-Inactive Metal Ions. J Am Chem Soc 2019; 141:1324-1336. [PMID: 30580510 DOI: 10.1021/jacs.8b11492] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Mononuclear nonheme manganese(IV)-oxo complexes binding calcium ion and other redox-inactive metal ions, [(dpaq)MnIV(O)]+-M n+ (1-Mn+, M n+ = Ca2+, Mg2+, Zn2+, Lu3+, Y3+, Al3+, and Sc3+) (dpaq = 2-[bis(pyridin-2-ylmethyl)]amino- N-quinolin-8-yl-acetamidate), were synthesized by reacting a hydroxomanganese(III) complex, [(dpaq)MnIII(OH)]+, with iodosylbenzene (PhIO) in the presence of redox-inactive metal ions (M n+). The Mn(IV)-oxo complexes were characterized using various spectroscopic techniques. In reactivity studies, we observed contrasting effects of M n+ on the reactivity of 1-M n+ in redox reactions such as electron-transfer (ET), oxygen atom transfer (OAT), and hydrogen atom transfer (HAT) reactions. In the OAT and ET reactions, the reactivity order of 1-M n+, such as 1-Sc3+ ≈ 1-Al3+ > 1-Y3+ > 1-Lu3+ > 1-Zn2+ > 1-Mg2+ > 1-Ca2+, follows the Lewis acidity of M n+ bound to the Mn-O moiety; that is, the stronger the Lewis acidity of M n+, the higher the reactivity of 1-M n+ becomes. In sharp contrast, the reactivity of 1-M n+ in the HAT reaction was reversed, giving the reactivity order 1-Ca2+ > 1-Mg2+ > 1-Zn2+ > 1-Lu3+> 1-Y3+> 1-Al3+ ≈ 1-Sc3+; that is, the higher is Lewis acidity of M n+, the lower the reactivity of 1-M n+ in the HAT reaction. The latter result implies that the Lewis acidity of M n+ bound to the Mn-O moiety can modulate the basicity of the metal-oxo moiety, thus influencing the HAT reactivity of 1-M n+; cytochrome P450 utilizes the axial thiolate ligand to increase the basicity of the iron-oxo moiety, which enhances the reactivity of compound I in C-H bond activation reactions.
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Affiliation(s)
| | - Yong-Min Lee
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea
| | - Yuliana Pineda-Galvan
- Department of Physics and Astronomy , Purdue University , 525 Northwestern Avenue , West Lafayette , Indiana 47907 , United States
| | - Deepika G Karmalkar
- 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
| | - So Hyun Jeon
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea
| | - Yulia Pushkar
- Department of Physics and Astronomy , Purdue University , 525 Northwestern Avenue , West Lafayette , Indiana 47907 , United States
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea.,Faculty of Science and Engineering, SENTAN, Japan Science and Technology Agency (JST) , Meijo University , Nagoya , Aichi 468-8502 , Japan
| | - Wonwoo Nam
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea.,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Center for Excellence in Molecular Synthesis, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP) , Chinese Academy of Sciences , Lanzhou , 730000 , China
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96
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Domenianni LI, Fligg R, Schäfermeier A, Straub S, Beerhues J, Sarkar B, Vöhringer P. Molecular and electronic structure of an azidocobalt(iii) complex derived from X-ray crystallography, linear spectroscopy and quantum chemical calculations. Phys Chem Chem Phys 2019; 21:20393-20402. [DOI: 10.1039/c9cp04350k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
X-ray diffraction, UV/Vis electronic spectroscopy and Fourier-transform infrared spectroscopy are used with DFT and CAS calculations to explore the molecular and electronic structure of the cationic complex (cyclam)(diazido)cobalt(iii).
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Affiliation(s)
- Luis I. Domenianni
- Abteilung für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Reinhold Fligg
- Abteilung für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Annett Schäfermeier
- Abteilung für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Steffen Straub
- Abteilung für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
| | - Julia Beerhues
- Institut für Chemie und Biochemie
- Anorganische Chemie
- Freie Universität Berlin
- 14195 Berlin
- Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie
- Anorganische Chemie
- Freie Universität Berlin
- 14195 Berlin
- Germany
| | - Peter Vöhringer
- Abteilung für Molekulare Physikalische Chemie
- Institut für Physikalische und Theoretische Chemie
- Rheinische Friedrich-Wilhelms-Universität
- 53115 Bonn
- Germany
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97
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Reactive Cobalt⁻Oxo Complexes of Tetrapyrrolic Macrocycles and N-based Ligand in Oxidative Transformation Reactions. Molecules 2018; 24:molecules24010078. [PMID: 30587824 PMCID: PMC6337149 DOI: 10.3390/molecules24010078] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 12/21/2018] [Accepted: 12/25/2018] [Indexed: 01/09/2023] Open
Abstract
High-valent cobalt–oxo complexes are reactive transient intermediates in a number of oxidative transformation processes e.g., water oxidation and oxygen atom transfer reactions. Studies of cobalt–oxo complexes are very important for understanding the mechanism of the oxygen evolution center in natural photosynthesis, and helpful to replicate enzyme catalysis in artificial systems. This review summarizes the development of identification of high-valent cobalt–oxo species of tetrapyrrolic macrocycles and N-based ligands in oxidation of organic substrates, water oxidation reaction and in the preparation of cobalt–oxo complexes.
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98
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Cook BJ, Pink M, Chen C, Caulton KG. Electrophile Recruitment as a Structural Element in Bis‐Pyrazolate Pyridine Complex Aggregation. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800689] [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)
- Brian J. Cook
- Department of Chemistry Indiana University‐Bloomington 800 E Kirkwood Avenue 47405 Bloomington IN USA
| | - Maren Pink
- Department of Chemistry Indiana University‐Bloomington 800 E Kirkwood Avenue 47405 Bloomington IN USA
- Indiana University Molecular Structure Center Indiana University‐Bloomington 800 E Kirkwood Avenue 47405 Bloomington IN USA
| | - Chun‐Hsing Chen
- Department of Chemistry Indiana University‐Bloomington 800 E Kirkwood Avenue 47405 Bloomington IN USA
- Indiana University Molecular Structure Center Indiana University‐Bloomington 800 E Kirkwood Avenue 47405 Bloomington IN USA
| | - Kenneth G. Caulton
- Department of Chemistry Indiana University‐Bloomington 800 E Kirkwood Avenue 47405 Bloomington IN USA
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99
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Saracini C, Fukuzumi S, Lee YM, Nam W. Photoexcited state chemistry of metal-oxygen complexes. Dalton Trans 2018; 47:16019-16026. [PMID: 30324192 DOI: 10.1039/c8dt03604g] [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
Recent advances on the excited state chemistry of metal-oxygen synthetic complexes based on earth-abundant metals such as copper, cobalt, and manganese are reviewed to show a much enhanced reactivity of the photoexcited states as compared with their relative ground states. Mononuclear copper(ii)-superoxide and dinuclear copper(ii)-peroxo complexes underwent copper-oxygen bond cleavage, dioxygen release, and copper(i)/dioxygen rebinding upon photoexcitation at low temperature. Photoirradiation of the cobalt-oxygen compound [(TAML)CoIV(O)]2- (6) (TAML = tetraamidomacrocyclic ligand) at 5 °C yielded a cobalt-oxygen excited state with 0.6(1) ns lifetime, showing a high reactivity in the bimolecular electron-transfer oxidations of m-xylene and anisole. An extremely long-lived excited state was generated upon photoexcitation of a manganese(iv)-oxo complex binding two Sc(OTf)3 molecules, which enabled the hydroxylation of benzene.
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Affiliation(s)
- Claudio Saracini
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.
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100
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Nurdin L, Spasyuk DM, Fairburn L, Piers WE, Maron L. Oxygen-Oxygen Bond Cleavage and Formation in Co(II)-Mediated Stoichiometric O 2 Reduction via the Potential Intermediacy of a Co(IV) Oxyl Radical. J Am Chem Soc 2018; 140:16094-16105. [PMID: 30398331 DOI: 10.1021/jacs.8b07726] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In reactions of significance to alternative energy schemes, metal catalysts are needed to overcome kinetically and thermodynamically difficult processes. Often, high-oxidation-state, high-energy metal oxo intermediates are proposed as mediators in elementary steps involving O-O bond cleavage and formation, but the mechanisms of these steps are difficult to study because of the fleeting nature of these species. Here we utilized a novel dianionic pentadentate ligand system that enabled a detailed mechanistic investigation of the protonation of a cobalt(III)-cobalt(III) peroxo dimer, a known intermediate in oxygen reduction catalysis to hydrogen peroxide. It was shown that double protonation occurs rapidly and leads to a low-energy O-O bond cleavage step that generates a Co(III) aquo complex and a highly reactive Co(IV) oxyl cation. The latter was probed computationally and experimentally implicated through chemical interception and isotope labeling experiments. In the absence of competing chemical reagents, it dimerizes and eliminates dioxygen in a step highly relevant to O-O bond formation in the oxygen evolution step in water oxidation. Thus, the study demonstrates both facile O-O bond cleavage and formation in the stoichiometric reduction of O2 to H2O with 2 equiv of Co(II) and suggests a new pathway for selective reduction of O2 to water via Co(III)-O-O-Co(III) peroxo intermediates.
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Affiliation(s)
- Lucie Nurdin
- Department of Chemistry , University of Calgary , 2500 University Drive NW , Calgary , Alberta T2N 1N4 , Canada
| | - Denis M Spasyuk
- Department of Chemistry , University of Calgary , 2500 University Drive NW , Calgary , Alberta T2N 1N4 , Canada
| | - Laura Fairburn
- Department of Chemistry , University of Calgary , 2500 University Drive NW , Calgary , Alberta T2N 1N4 , Canada
| | - Warren E Piers
- Department of Chemistry , University of Calgary , 2500 University Drive NW , Calgary , Alberta T2N 1N4 , Canada
| | - Laurent Maron
- LPCNO, Université de Toulouse, INSA, UPS, LPCNO , 135 avenue de Rangueil , F-31077 Toulouse , France , and CNRS, LPCNO, F-31077 Toulouse, France
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