1
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Scott JS, Schneider JE, Tewelde EG, Gardner JG, Anferov SW, Filatov AS, Anderson JS. Combining Donor Strength and Oxidative Stability in Scorpionates: A Strongly Donating Fluorinated Mesoionic Tris(imidazol-5-ylidene)borate Ligand. Inorg Chem 2023; 62:21224-21232. [PMID: 38051936 DOI: 10.1021/acs.inorgchem.3c03251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Strongly donating scorpionate ligands support the study of high-valent transition metal chemistry; however, their use is frequently limited by oxidative degradation. To address this concern, we report the synthesis of a tris(imidazol-5-ylidene)borate ligand featuring trifluoromethyl groups surrounding its coordination pocket. This ligand represents the first example of a chelating poly(imidazol-5-ylidene) mesoionic carbene ligand, a scaffold that is expected to be extremely donating. The {NiNO}10 complex of this ligand, as well as that of a previously reported strongly donating tris(imidazol-2-ylidene)borate, has been synthesized and characterized. This new ligand's strong donor properties, as measured by the υNO of its {NiNO}10 complex and natural bonding orbital second-order perturbative energy analysis, are at par with those of the well-studied alkyl-substituted tris(imidazol-2-ylidene)borates, which are known to effectively stabilize high-valent intermediates. The good donor properties of this ligand, despite the electron-withdrawing trifluoromethyl substituents, arise from the strongly donating imidazol-5-ylidene mesoionic carbene arms. These donor properties, when combined with the robustness of trifluoromethyl groups toward oxidative decomposition, suggest this ligand scaffold will be a useful platform in the study of oxidizing high-valent transition-metal species.
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Affiliation(s)
- Joseph S Scott
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Joseph E Schneider
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Eyob G Tewelde
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Joel G Gardner
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Sophie W Anferov
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Alexander S Filatov
- 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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2
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Daya VP, Jagan R, Chand DK. Self-assembled discrete and polymeric cobalt(II) complexes of a carboxylate appended tripodal tetradentate ligand: reactivity with aerial dioxygen or aqueous hydrogen peroxide. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02049-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Ghosh I, Chakraborty B, Bera A, Paul S, Paine TK. Selective oxygenation of C-H and CC bonds with H 2O 2 by high-spin cobalt(II)-carboxylate complexes. Dalton Trans 2022; 51:2480-2492. [PMID: 35050271 DOI: 10.1039/d1dt02235k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Four cobalt(II)-carboxylate complexes [(6-Me3-TPA)CoII(benzoate)](BPh4) (1), [(6-Me3-TPA)CoII(benzilate)](ClO4) (2), [(6-Me3-TPA)CoII(mandelate)](BPh4) (3), and [(6-Me3-TPA)CoII(MPA)](BPh4) (4) (HMPA = 2-methoxy-2-phenylacetic acid) of the 6-Me3-TPA (tris((6-methylpyridin-2-yl)methyl)amine) ligand were isolated to investigate their ability in H2O2-dependent selective oxygenation of C-H and CC bonds. All six-coordinate complexes contain a high-spin cobalt(II) center. While the cobalt(II) complexes are inert toward dioxygen, each of these complexes reacts readily with hydrogen peroxide to form a diamagnetic cobalt(III) species, which decays with time leading to the oxidation of the methyl groups on the pyridine rings of the supporting ligand. Intramolecular ligand oxidation by the cobalt-based oxidant is partially inhibited in the presence of external substrates, and the substrates are converted to their corresponding oxidized products. Kinetic studies and labelling experiments indicate the involvement of a metal-based oxidant in affecting the chemo- and stereo-selective catalytic oxygenation of aliphatic C-H bonds and epoxidation of alkenes. An electrophilic cobalt-oxygen species that exhibits a kinetic isotope effect (KIE) value of 5.3 in toluene oxidation by 1 is proposed as the active oxidant. Among the complexes, the cobalt(II)-benzoate (1) and cobalt(II)-MPA (4) complexes display better catalytic activity compared to their α-hydroxy analogues (2 and 3). Catalytic studies with the cobalt(II)-acetonitrile complex [(6-Me3-TPA)CoII(CH3CN)2](ClO4)2 (5) in the presence and absence of externally added benzoate support the role of the carboxylate co-ligand in oxidation reactions. The proposed catalytic reaction involves a carboxylate-bridged dicobalt complex in the activation of H2O2 followed by the oxidation of substrates by a metal-based oxidant.
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Affiliation(s)
- Ivy Ghosh
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Biswarup Chakraborty
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Abhijit Bera
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
| | - Satadal Paul
- Department of Chemistry, Bangabasi Morning College, 19, Rajkumar Chakraborty Sarani, Kolkata - 700 009, India
| | - Tapan Kanti Paine
- School of Chemical Sciences, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032, India.
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4
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Goetz MK, Schneider JE, Filatov AS, Jesse KA, Anderson JS. Enzyme-Like Hydroxylation of Aliphatic C-H Bonds From an Isolable Co-Oxo Complex. J Am Chem Soc 2021; 143:20849-20862. [PMID: 34856101 DOI: 10.1021/jacs.1c09280] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The selective hydroxylation of aliphatic C-H bonds remains a challenging but broadly useful transformation. Nature has evolved systems that excel at this reaction, exemplified by cytochrome P450 enzymes, which use an iron-oxo intermediate to activate aliphatic C-H bonds with k1 > 1400 s-1 at 4 °C. Many synthetic catalysts have been inspired by these enzymes and are similarly proposed to use transition metal-oxo intermediates. However, most examples of well-characterized transition metal-oxo species are not capable of reacting with strong, aliphatic C-H bonds, resulting in a lack of understanding of what factors facilitate this reactivity. Here, we report the isolation and characterization of a new terminal CoIII-oxo complex, PhB(AdIm)3CoIIIO. Upon oxidation, a transient CoIV-oxo intermediate is generated that is capable of hydroxylating aliphatic C-H bonds with an extrapolated k1 for C-H activation >130 s-1 at 4 °C, comparable to values observed in cytochrome P450 enzymes. Experimental thermodynamic values and DFT analysis demonstrate that, although the initial C-H activation step in this reaction is endergonic, the overall reaction is driven by an extremely exergonic radical rebound step, similar to what has been proposed in cytochrome P450 enzymes. The rapid C-H hydroxylation reactivity displayed in this well-defined system provides insight into how hydroxylation is accomplished by biological systems and similarly potent synthetic oxidants.
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Affiliation(s)
- McKenna K Goetz
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Joseph E Schneider
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Alexander S Filatov
- Department of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Kate A Jesse
- 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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5
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Synthesis, structural characterization, and reactivity of a dinuclear cobalt(II) (μ-hydroxo)(μ-pyrazolato) complex based on a hydrotris(pyrazolyl)borate ligand. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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6
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DeLucia AA, Kelly KA, Herrera KA, Gray DL, Olshansky L. Intramolecular Hydrogen-Bond Interactions Tune Reactivity in Biomimetic Bis(μ-hydroxo)dicobalt Complexes. Inorg Chem 2021; 60:15599-15609. [PMID: 34606250 DOI: 10.1021/acs.inorgchem.1c02210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Active site hydrogen-bond (H-bond) networks represent a key component by which metalloenzymes control the formation and deployment of high-valent transition metal-oxo intermediates. We report a series of dinuclear cobalt complexes that serve as structural models for the nonheme diiron enzyme family and feature a Co2(μ-OH)2 diamond core stabilized by intramolecular H-bond interactions. We define the conditions required for the kinetically controlled synthesis of these complexes: [Co2(μ-OH)2(μ-OAc)(κ1-OAc)2(pyR)4][PF6] (1R), where OAc = acetate and pyR = pyridine with para-substituent R, and we describe a homologous series of 1R in which the para-R substituent on pyridine is modulated. The solid state X-ray diffraction (XRD) structures of 1R are similar across the series, but in solution, their 1H NMR spectra reveal a linear free energy relationship (LFER) where, as R becomes increasingly electron-withdrawing, the intramolecular H-bond interaction between bridging μ-OH and κ1-acetate ligands results in increasingly "oxo-like" μ-OH bridges. Deprotonation of the bridging μ-OH results in the quantitative conversion to corresponding cubane complexes: [Co4(μ-O)4(μ3-OAc)4(pyR)4] (2R), which represent the thermodynamic sink of self-assembly. These reactions are unusually slow for rate-limiting deprotonation events, but rapid-mixing experiments reveal a 6000-fold rate acceleration on going from R = OMe to R = CN. These results suggest that we can tune reactivity by modulating the μ-OH pKa in the presence of intramolecular H-bond interactions to maintain stability as the octahedral d6 centers become increasingly acidic. Nature may similarly employ dynamic carboxylate-mediated H-bond interactions to control the reactivity of acidic transition metal-oxo intermediates.
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Affiliation(s)
- Alyssa A DeLucia
- Department of Chemistry, University of Illinois, Urbana-Champaign, 600 S. Mathews Ave. Urbana, Illinois 61801, United States
| | - Kimberly A Kelly
- Department of Chemistry, University of Illinois, Urbana-Champaign, 600 S. Mathews Ave. Urbana, Illinois 61801, United States
| | - Kevin A Herrera
- Department of Chemistry, University of Illinois, Urbana-Champaign, 600 S. Mathews Ave. Urbana, Illinois 61801, United States
| | - Danielle L Gray
- Department of Chemistry, University of Illinois, Urbana-Champaign, 600 S. Mathews Ave. Urbana, Illinois 61801, United States
| | - Lisa Olshansky
- Department of Chemistry, University of Illinois, Urbana-Champaign, 600 S. Mathews Ave. Urbana, Illinois 61801, United States
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7
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Terao I, Horii S, Nakazawa J, Okamura M, Hikichi S. Efficient alkane hydroxylation catalysis of nickel(ii) complexes with oxazoline donor containing tripodal tetradentate ligands. Dalton Trans 2020; 49:6108-6118. [PMID: 32323686 DOI: 10.1039/d0dt00733a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tris(oxazolynylmethyl)amine TOAR (where R denotes the substituent groups on the fourth position of the oxazoline rings) complexes of nickel(ii) have been synthesized as catalyst precursors for alkane oxidation with meta-chloroperoxybenzoic acid (m-CPBA). The molecular structures of acetato, nitrato, meta-chlorobenzoato and chlorido complexes with TOAMe2 have been determined using X-ray crystallography. The bulkiness of the substituent groups R affects the coordination environment of the nickel(ii) centers, as has been demonstrated by comparison of the molecular structures of chlorido complexes with TOAMe2 and TOAtBu. The nickel(ii)-acetato complex with TOAMe2 is an efficient catalyst precursor compared with the tris(pyridylmethyl)amine (TPA) analogue. Oxazolynyl donors' strong σ-electron donating ability will enhance the catalytic activity. Catalytic reaction rates and substrate oxidizing position selectivity are controlled by the structural properties of the R of TOAR. Reaction of the acetato complex with TOAMe2 and m-CPBA yields the corresponding acylperoxido species, which can be detected using spectroscopy. Kinetic studies of the decay process of the acylperoxido species suggest that the acylperoxido species is a precursor of an active species for alkane oxidation.
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Affiliation(s)
- Ikumi Terao
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.
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8
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Alkane and alkene oxidation reactions catalyzed by nickel(II) complexes: Effect of ligand factors. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213085] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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9
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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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10
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Kumar A, Sengupta A, Demeshko S, Mukherjee R. Structure, magnetism and reactivity of a {MnIII(μ-O)2MnIV}3+ core towards oxidation of phenols. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.06.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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11
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Pirovano P, Berry AR, Swart M, McDonald AR. Indirect evidence for a NiIII–oxyl oxidant in the reaction of a NiII complex with peracid. Dalton Trans 2018; 47:246-250. [DOI: 10.1039/c7dt03316h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxidation of a NiII complex with m-CPBA is shown to promote the formation of a transient NiIII–O˙ species. Methine C–H bond activation in the supporting ligand by this species led to a benzoxazine product.
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Affiliation(s)
- Paolo Pirovano
- School of Chemistry and CRANN/AMBER Nanoscience Institute
- Trinity College Dublin
- The University of Dublin
- College Green
- Dublin 2
| | - Abigail R. Berry
- School of Chemistry and CRANN/AMBER Nanoscience Institute
- Trinity College Dublin
- The University of Dublin
- College Green
- Dublin 2
| | - Marcel Swart
- ICREA
- Pg. Lluís Companys 23
- 08010 Barcelona
- Spain
- Institut de Química Computacional i Catálisi
| | - Aidan R. McDonald
- School of Chemistry and CRANN/AMBER Nanoscience Institute
- Trinity College Dublin
- The University of Dublin
- College Green
- Dublin 2
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12
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Lu T, Yang CF, Zhang LY, Fei F, Chen XT, Xue ZL. Metal Complexes with a Hexadentate Macrocyclic Diamine-Tetracarbene Ligand. Inorg Chem 2017; 56:11917-11928. [DOI: 10.1021/acs.inorgchem.7b01896] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Taotao Lu
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Chu-Fan Yang
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Li-Yi Zhang
- State Key Laboratory
of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Fuzhou 350002, P. R. China
| | - Fan Fei
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xue-Tai Chen
- State Key Laboratory
of Coordination Chemistry, Nanjing National Laboratory of Microstructures,
School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Zi-Ling Xue
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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13
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Lau N, Sano Y, Ziller JW, Borovik AS. Terminal Ni II-OH/-OH 2 complexes in trigonal bipyramidal geometries derived from H 2O. Polyhedron 2017; 125:179-185. [PMID: 29170577 PMCID: PMC5695699 DOI: 10.1016/j.poly.2016.11.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The preparation and characterization of two NiII complexes are described, a terminal NiII-OH complex with the tripodal ligand tris[(N)-tertbutylureaylato)-N-ethyl)]aminato ([H3buea]3-) and a terminal Ni II-OH2 complex with the tripodal ligand N,N',N″-[2,2',2″-nitrilotris(ethane-2,1-diyl)]tris(2,4,6-trimethylbenzenesulfonamido) ([MST]3-). For both complexes, the source of the -OH and -OH2 ligand is water. The salts K2[NiIIH3buea(OH)] and NMe4[NiIIMST(OH2)] were characterized using perpendicular-mode X-band electronic paramagnetic resonance, Fourier transform infrared, UV-visible spectroscopies, and its electrochemical properties were evaluated using cyclic voltammetry. The solid state structures of these complexes determined by X-ray diffraction methods reveal that they adopt a distorted trigonal bipyramidal geometry, an unusual structure for 5-coordinate NiII complexes. Moreover, the NiII-OH and NiII-OH2 units form intramolecular hydrogen bonding networks with the [H3buea]3- and [MST]3- ligands. The oxidation chemistry of these complexes was explored by treating the high-spin NiII compounds with one-electron oxidants. Species were formed with S = 1/2 spin ground states that are consistent with formation of monomeric NiIII species. While the formation of NiIII-OH complexes cannot be ruled out, the lack of observable O-H vibrations from the putative Ni-OH units suggest the possibility that other high valent Ni species are formed.
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Affiliation(s)
- Nathanael Lau
- Department of Chemistry, University of California - Irvine, 1102 Natural Sciences II, Irvine, CA 92697-2025, United States
| | - Yohei Sano
- Department of Chemistry, University of California - Irvine, 1102 Natural Sciences II, Irvine, CA 92697-2025, United States
| | - Joseph W Ziller
- Department of Chemistry, University of California - Irvine, 1102 Natural Sciences II, Irvine, CA 92697-2025, United States
| | - A S Borovik
- Department of Chemistry, University of California - Irvine, 1102 Natural Sciences II, Irvine, CA 92697-2025, United States
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14
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Engelmann X, Yao S, Farquhar ER, Szilvási T, Kuhlmann U, Hildebrandt P, Driess M, Ray K. A New Domain of Reactivity for High-Valent Dinuclear [M(μ-O) 2 M'] Complexes in Oxidation Reactions. Angew Chem Int Ed Engl 2017; 56:297-301. [PMID: 27906528 PMCID: PMC5534222 DOI: 10.1002/anie.201607611] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 10/06/2016] [Indexed: 12/31/2022]
Abstract
The strikingly different reactivity of a series of homo- and heterodinuclear [(MIII )(μ-O)2 (MIII )']2+ (M=Ni; M'=Fe, Co, Ni and M=M'=Co) complexes with β-diketiminate ligands in electrophilic and nucleophilic oxidation reactions is reported, and can be correlated to the spectroscopic features of the [(MIII )(μ-O)2 (MIII )']2+ core. In particular, the unprecedented nucleophilic reactivity of the symmetric [NiIII (μ-O)2 NiIII ]2+ complex and the decay of the asymmetric [NiIII (μ-O)2 CoIII ]2+ core through aromatic hydroxylation reactions represent a new domain for high-valent bis(μ-oxido)dimetal reactivity.
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Affiliation(s)
- Xenia Engelmann
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
| | - Shenglai Yao
- Department of Chemistry, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Erik R Farquhar
- Case Center for Synchrotron Biosciences, NSLS-II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Tibor Szilvási
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szent Gellért tér 4, 1111, Budapest, Hungary
| | - Uwe Kuhlmann
- Department of Chemistry, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Peter Hildebrandt
- Department of Chemistry, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Matthias Driess
- Department of Chemistry, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Kallol Ray
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489, Berlin, Germany
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15
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Sankaralingam M, Vadivelu P, Palaniandavar M. Novel nickel(ii) complexes of sterically modified linear N4 ligands: effect of ligand stereoelectronic factors and solvent of coordination on nickel(ii) spin-state and catalytic alkane hydroxylation. Dalton Trans 2017; 46:7181-7193. [DOI: 10.1039/c7dt00576h] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The donor atom type and diazacyclo backbone of the ligands and solvent of coordination dictate the Ni(ii) spin state (4, LS; 1–3, 5, HS) and catalytic activity of complexes.
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Affiliation(s)
| | - Prabha Vadivelu
- Chemical Sciences and Technology Division
- National Institute for Interdisciplinary Science and Technology
- CSIR
- Trivandrum-695019
- India
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16
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Engelmann X, Yao S, Farquhar ER, Szilvási T, Kuhlmann U, Hildebrandt P, Driess M, Ray K. A New Domain of Reactivity for High‐Valent Dinuclear [M(μ‐O)
2
M′] Complexes in Oxidation Reactions. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607611] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xenia Engelmann
- Department of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
| | - Shenglai Yao
- Department of Chemistry Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Erik R. Farquhar
- Case Center for Synchrotron Biosciences, NSLS-II Brookhaven National Laboratory Upton NY 11973 USA
| | - Tibor Szilvási
- Department of Inorganic and Analytical Chemistry Budapest University of Technology and Economics Szent Gellért tér 4 1111 Budapest Hungary
| | - Uwe Kuhlmann
- Department of Chemistry Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Peter Hildebrandt
- Department of Chemistry Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Matthias Driess
- Department of Chemistry Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Germany
| | - Kallol Ray
- Department of Chemistry Humboldt-Universität zu Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
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17
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Oxygen activation by mononuclear Mn, Co, and Ni centers in biology and synthetic complexes. J Biol Inorg Chem 2016; 22:407-424. [PMID: 27853875 DOI: 10.1007/s00775-016-1402-7] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 10/21/2016] [Indexed: 10/20/2022]
Abstract
The active sites of metalloenzymes that catalyze O2-dependent reactions generally contain iron or copper ions. However, several enzymes are capable of activating O2 at manganese or nickel centers instead, and a handful of dioxygenases exhibit activity when substituted with cobalt. This minireview summarizes the catalytic properties of oxygenases and oxidases with mononuclear Mn, Co, or Ni active sites, including oxalate-degrading oxidases, catechol dioxygenases, and quercetin dioxygenase. In addition, recent developments in the O2 reactivity of synthetic Mn, Co, or Ni complexes are described, with an emphasis on the nature of reactive intermediates featuring superoxo-, peroxo-, or oxo-ligands. Collectively, the biochemical and synthetic studies discussed herein reveal the possibilities and limitations of O2 activation at these three "overlooked" metals.
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18
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Pirovano P, Farquhar ER, Swart M, McDonald AR. Tuning the Reactivity of Terminal Nickel(III)-Oxygen Adducts for C-H Bond Activation. J Am Chem Soc 2016; 138:14362-14370. [PMID: 27739688 DOI: 10.1021/jacs.6b08406] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two metastable NiIII complexes, [NiIII(OAc)(L)] and [NiIII(ONO2)(L)] (L = N,N'-(2,6-dimethylphenyl)-2,6-pyridinedicarboxamidate, OAc = acetate), were prepared, adding to the previously prepared [NiIII(OCO2H)(L)], with the purpose of probing the properties of terminal late-transition metal oxidants. These high-valent oxidants were prepared by the one-electron oxidation of their NiII precursors ([NiII(OAc)(L)]- and [NiII(ONO2)(L)]-) with tris(4-bromophenyl)ammoniumyl hexachloroantimonate. Fascinatingly, the reaction between any [NiII(X)(L)]- and NaOCl/acetic acid (AcOH) or cerium ammonium nitrate ((NH4)2[CeIV(NO3)6], CAN), yielded [NiIII(OAc)(L)] and [NiIII(ONO2)(L)], respectively. An array of spectroscopic characterizations (electronic absorption, electron paramagnetic resonance, X-ray absorption spectroscopies), electrochemical methods, and computational predictions (density functional theory) have been used to determine the structural, electronic, and magnetic properties of these highly reactive metastable oxidants. The NiIII-oxidants proved competent in the oxidation of phenols (weak O-H bonds) and a series of hydrocarbon substrates (some with strong C-H bonds). Kinetic investigation of the reactions with di-tert-butylphenols showed a 15-fold enhanced reaction rate for [NiIII(ONO2)(L)] compared to [NiIII(OCO2H)(L)] and [NiIII(OAc)(L)], demonstrating the effect of electron-deficiency of the O-ligand on oxidizing power. The oxidation of a series of hydrocarbons by [NiIII(OAc)(L)] was further examined. A linear correlation between the rate constant and the bond dissociation energy of the C-H bonds in the substrates was indicative of a hydrogen atom transfer mechanism. The reaction rate with dihydroanthracene (k2 = 8.1 M-1 s-1) compared favorably with the most reactive high-valent metal-oxidants, and showcases the exceptional reactivity of late transition metal-oxygen adducts.
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Affiliation(s)
- Paolo Pirovano
- School of Chemistry and CRANN/AMBER Nanoscience Institute, Trinity College Dublin, The University of Dublin , College Green, Dublin 2, Ireland
| | - Erik R Farquhar
- Case Western Reserve University Center for Synchrotron Biosciences, National Synchrotron Light Source II, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Marcel Swart
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain.,Institut de Química Computacional i Catàlisi, Facultat de Ciències, Universitat de Girona , Campus Montilivi, 17003 Girona, Spain
| | - Aidan R McDonald
- School of Chemistry and CRANN/AMBER Nanoscience Institute, Trinity College Dublin, The University of Dublin , College Green, Dublin 2, Ireland
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19
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Xu H, Diccianni JB, Katigbak J, Hu C, Zhang Y, Diao T. Bimetallic C–C Bond-Forming Reductive Elimination from Nickel. J Am Chem Soc 2016; 138:4779-86. [DOI: 10.1021/jacs.6b00016] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hongwei Xu
- Department of Chemistry, New York University, 100
Washington Square East, New York, New York 10003, United States
| | - Justin B. Diccianni
- Department of Chemistry, New York University, 100
Washington Square East, New York, New York 10003, United States
| | - Joseph Katigbak
- Department of Chemistry, New York University, 100
Washington Square East, New York, New York 10003, United States
| | - Chunhua Hu
- Department of Chemistry, New York University, 100
Washington Square East, New York, New York 10003, United States
| | - Yingkai Zhang
- Department of Chemistry, New York University, 100
Washington Square East, New York, New York 10003, United States
| | - Tianning Diao
- Department of Chemistry, New York University, 100
Washington Square East, New York, New York 10003, United States
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20
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Kafentzi MC, Orio M, Réglier M, Yao S, Kuhlmann U, Hildebrandt P, Driess M, Simaan AJ, Ray K. Changing the chemical and physical properties of high valent heterobimetallic bis-(μ-oxido) Cu–Ni complexes by ligand effects. Dalton Trans 2016; 45:15994-16000. [DOI: 10.1039/c6dt02391f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new heterobimetallic [LNiO2Cu(RPY2)]+ (RPY2 = N-substituted bis 2-pyridyl(ethylamine) ligands with R = indane, 3a or R = Me, 3b) complexes have been spectroscopically trapped at low temperatures.
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Affiliation(s)
| | - Maylis Orio
- Aix Marseille Univ
- CNRS
- Centrale Marseille
- iSm2
- Marseille
| | | | - Shenglai Yao
- Department of Chemistry
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | - Uwe Kuhlmann
- Department of Chemistry
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | - Peter Hildebrandt
- Department of Chemistry
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | - Matthias Driess
- Department of Chemistry
- Technische Universität Berlin
- 10623 Berlin
- Germany
| | | | - Kallol Ray
- Department of Chemistry
- Humboldt-Universität zu Berlin
- 12489 Berlin
- Germany
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21
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Chakraborty S, Piszel PE, Hayes CE, Baker RT, Jones WD. Highly Selective Formation of n-Butanol from Ethanol through the Guerbet Process: A Tandem Catalytic Approach. J Am Chem Soc 2015; 137:14264-7. [DOI: 10.1021/jacs.5b10257] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Sumit Chakraborty
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Paige E. Piszel
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Cassandra E. Hayes
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
- Department
of Chemistry and Biomolecular Sciences and Centre for Catalysis Research
and Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5 Canada
| | - R. Tom Baker
- Department
of Chemistry and Biomolecular Sciences and Centre for Catalysis Research
and Innovation, University of Ottawa, Ottawa, Ontario K1N 6N5 Canada
| | - William D. Jones
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
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22
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Chakraborty S, Piszel PE, Brennessel WW, Jones WD. A Single Nickel Catalyst for the Acceptorless Dehydrogenation of Alcohols and Hydrogenation of Carbonyl Compounds. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00824] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sumit Chakraborty
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Paige E. Piszel
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William W. Brennessel
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William D. Jones
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
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23
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Zhao P, Lei H, Ni C, Guo JD, Kamali S, Fettinger JC, Grandjean F, Long GJ, Nagase S, Power PP. Quasi-three-coordinate iron and cobalt terphenoxide complexes {Ar(iPr8)OM(μ-O)}2 (Ar(iPr8) = C6H-2,6-(C6H2-2,4,6-(i)Pr3)2-3,5-(i)Pr2; M = Fe or Co) with M(III)2(μ-O)2 core structures and the peroxide dimer of 2-oxepinoxy relevant to benzene oxidation. Inorg Chem 2015; 54:8914-22. [PMID: 26331405 DOI: 10.1021/acs.inorgchem.5b00930] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The bis(μ-oxo) dimeric complexes {Ar(iPr8)OM(μ-O)}2 (Ar(iPr8) = C6H-2,6-(C6H2-2,4,6-(i)Pr3)2-3,5-(i)Pr2; M = Fe (1), Co (2)) were prepared by oxidation of the M(I) half-sandwich complexes {Ar(iPr8)M(η(6)-arene)} (arene = benzene or toluene). Iron species 1 was prepared by reacting {Ar(iPr8)Fe(η(6)-benzene)} with N2O or O2, and cobalt species 2 was prepared by reacting {Ar(iPr8)Co(η(6)-toluene)} with O2. Both 1 and 2 were characterized by X-ray crystallography, UV-vis spectroscopy, magnetic measurements, and, in the case of 1, Mössbauer spectroscopy. The solid-state structures of both compounds reveal unique M2(μ-O)2 (M = Fe (1), Co(2)) cores with formally three-coordinate metal ions. The Fe···Fe separation in 1 bears a resemblance to that in the Fe2(μ-O)2 diamond core proposed for the methane monooxygenase intermediate Q. The structural differences between 1 and 2 are reflected in rather differing magnetic behavior. Compound 2 is thermally unstable, and its decomposition at room temperature resulted in the oxidation of the Ar(iPr8) ligand via oxygen insertion and addition to the central aryl ring of the terphenyl ligand to produce the 5,5'-peroxy-bis[4,6-(i)Pr2-3,7-bis(2,4,6-(i)Pr3-phenyl)oxepin-2(5H)-one] (3). The structure of the oxidized terphenyl species is closely related to that of a key intermediate proposed for the oxidation of benzene.
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Affiliation(s)
- Pei Zhao
- Department of Chemistry, University of California , Davis, California 95616, United States
| | - Hao Lei
- Department of Chemistry, University of California , Davis, California 95616, United States
| | - Chengbao Ni
- Department of Chemistry, University of California , Davis, California 95616, United States
| | - Jing-Dong Guo
- Fukui Institute for Fundamental Chemistry, Kyoto University , Takano-Nishihiraki-cho, Sakyo-ku, Kyoto 606-8103, Japan
| | - Saeed Kamali
- Department of Chemistry, University of California , Davis, California 95616, United States
| | - James C Fettinger
- Department of Chemistry, University of California , Davis, California 95616, United States
| | - Fernande Grandjean
- Department of Chemistry, Missouri University of Science and Technology, University of Missouri , Rolla, Missouri 65409-0010, United States
| | - Gary J Long
- Department of Chemistry, Missouri University of Science and Technology, University of Missouri , Rolla, Missouri 65409-0010, United States
| | - Shigeru Nagase
- Fukui Institute for Fundamental Chemistry, Kyoto University , Takano-Nishihiraki-cho, Sakyo-ku, Kyoto 606-8103, Japan
| | - Philip P Power
- Department of Chemistry, University of California , Davis, California 95616, United States
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24
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Morimoto Y, Bunno S, Fujieda N, Sugimoto H, Itoh S. Direct Hydroxylation of Benzene to Phenol Using Hydrogen Peroxide Catalyzed by Nickel Complexes Supported by Pyridylalkylamine Ligands. J Am Chem Soc 2015; 137:5867-70. [DOI: 10.1021/jacs.5b01814] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Yuma Morimoto
- Department
of Material and
Life Science, Division of Advanced Science and Biotechnology, Graduate
School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shuji Bunno
- Department
of Material and
Life Science, Division of Advanced Science and Biotechnology, Graduate
School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Nobutaka Fujieda
- Department
of Material and
Life Science, Division of Advanced Science and Biotechnology, Graduate
School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hideki Sugimoto
- Department
of Material and
Life Science, Division of Advanced Science and Biotechnology, Graduate
School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shinobu Itoh
- Department
of Material and
Life Science, Division of Advanced Science and Biotechnology, Graduate
School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
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25
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López-Banet L, Santana MD, García G, Pérez J, García L, Lezama L, da Silva I. Blocking and bridging ligands direct the structure and magnetic properties of dimers of pentacoordinate nickel(II). Dalton Trans 2015; 44:6839-47. [PMID: 25765477 DOI: 10.1039/c5dt00181a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dinuclear pentacoordinate nickel(ii) complexes of the formula [(NiTp*)2(μ-L)] (Tp* = hydrotris(3,5-dimethylpyrazolyl)borate; L = oxalate (); oxamate (); oxamidate (); OC(4-Cl-C6H4N)C(4-Cl-C6H4N)O ()) and {[Ni(N3-mc)]2(μ-L)}(PF6)2 (N3-mc = 2,4,4-trimethyl-1,5,9-triazacyclododec-1-ene; L = oxalate (); oxamate ()) have been synthesized and spectroscopically characterized (IR, (1)H NMR). X-ray structures of show nickel(ii) in a square pyramidal geometry and different supramolecular interactions. Magnetic measurements for show strong antiferromagnetic interactions across the bridging ligand [: J = -36.8 cm(-1), g = 2.16; : J = -43.6 cm(-1), g = 2.12; : J = -51.1 cm(-1), g = 2.12; : J = -39.7 cm(-1), g = 2.18; : J = -35.4 cm(-1), g = 2.20; : J = -44.3 cm(-1), g = 2.18]. Magneto-structural correlations between the magnitude of the magnetic coupling and the different blocking ligands, the different bridging ligands, the distortion of the coordination environment of Ni(ii) and the planarity between the bridging ligand and the basal plane of the Ni(ii) environment have been established for all complexes.
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Affiliation(s)
- Luisa López-Banet
- Departamento de Química Inorgánica and Regional Campus of International Excellence (Campus Mare Nostrum), Universidad de Murcia, E-30071 Murcia, Spain.
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26
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Pirovano P, Farquhar ER, Swart M, Fitzpatrick AJ, Morgan GG, McDonald AR. Characterization and reactivity of a terminal nickel(III)-oxygen adduct. Chemistry 2015; 21:3785-90. [PMID: 25612563 DOI: 10.1002/chem.201406485] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Indexed: 11/06/2022]
Abstract
High-valent terminal metal-oxygen adducts are hypothesized to be the potent oxidizing reactants in late transition metal oxidation catalysis. In particular, examples of high-valent terminal nickel-oxygen adducts are scarce, meaning there is a dearth in the understanding of such oxidants. A monoanionic Ni(II)-bicarbonate complex has been found to react in a 1:1 ratio with the one-electron oxidant tris(4-bromophenyl)ammoniumyl hexachloroantimonate, yielding a thermally unstable intermediate in high yield (ca. 95%). Electronic absorption, electronic paramagnetic resonance, and X-ray absorption spectroscopies and density functional theory calculations confirm its description as a low-spin (S = 1/2), square planar Ni(III)-oxygen adduct. This rare example of a high-valent terminal nickel-oxygen complex performs oxidations of organic substrates, including 2,6-di-tert-butylphenol and triphenylphosphine, which are indicative of hydrogen atom abstraction and oxygen atom transfer reactivity, respectively.
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Affiliation(s)
- Paolo Pirovano
- School of Chemistry and CRANN/AMBER Nanoscience Institute, The University of Dublin, Trinity College, College Green, Dublin 2 (Ireland)
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27
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Mindiola DJ, Waterman R, Iluc VM, Cundari TR, Hillhouse GL. Carbon-hydrogen bond activation, C-N bond coupling, and cycloaddition reactivity of a three-coordinate nickel complex featuring a terminal imido ligand. Inorg Chem 2014; 53:13227-38. [PMID: 25437507 PMCID: PMC4269405 DOI: 10.1021/ic5026153] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Indexed: 11/29/2022]
Abstract
The three-coordinate imidos (dtbpe)Ni═NR (dtbpe = (t)Bu2PCH2CH2P(t)Bu2, R = 2,6-(i)Pr2C6H3, 2,4,6-Me3C6H2 (Mes), and 1-adamantyl (Ad)), which contain a legitimate Ni-N double bond as well as basic imido nitrogen based on theoretical analysis, readily deprotonate HC≡CPh to form the amide acetylide species (dtbpe)Ni{NH(Ar)}(C≡CPh). In the case of R = 2,6-(i)Pr2C6H3, reductive carbonylation results in formation of the (dtbpe)Ni(CO)2 along with the N-C coupled product keteneimine PhCH═C═N(2,6- (i)Pr2C6H3). Given the ability of the Ni═N bond to have biradical character as suggested by theoretical analysis, H atom abstraction can also occur in (dtbpe)Ni═N{2,6-(i)Pr2C6H3} when this species is treated with HSn((n)Bu)3. Likewise, the microscopic reverse reaction--conversion of the Ni(I) anilide (dtbpe)Ni{NH(2,6-(i)Pr2C6H3)} to the imido (dtbpe)Ni═N{2,6-(i)Pr2C6H3}--is promoted when using the radical Mes*O(•) (Mes* = 2,4,6-(t)Bu3C6H2). Reactivity studies involving the imido complexes, in particular (dtbpe)Ni═N{2,6-(i)Pr2C6H3}, are also reported with small, unsaturated molecules such as diphenylketene, benzylisocyanate, benzaldehyde, and carbon dioxide, including the formation of C-N and N-N bonds by coupling reactions. In addition to NMR spectroscopic data and combustion analysis, we also report structural studies for all the cycloaddition reactions involving the imido (dtbpe)Ni═N{2,6-(i)Pr2C6H3}.
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Affiliation(s)
- Daniel J. Mindiola
- Department
of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Rory Waterman
- Department
of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Vlad M. Iluc
- Department
of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
| | - Thomas R. Cundari
- Department
of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
- Department of Chemistry, Center for Advanced Scientific Computing
and Modeling (CASCaM), University of North
Texas, Denton, Texas 76203, United
States
| | - Gregory L. Hillhouse
- Department
of Chemistry, The University of Chicago, Chicago, Illinois 60637, United States
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Nickel(II) Complexes of Pentadentate N5 Ligands as Catalysts for Alkane Hydroxylation by Usingm-CPBA as Oxidant: A Combined Experimental and Computational Study. Chemistry 2014; 20:11346-61. [DOI: 10.1002/chem.201402391] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Indexed: 11/07/2022]
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29
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Poulten RC, López I, Llobet A, Mahon MF, Whittlesey MK. Stereoelectronic Effects in C–H Bond Oxidation Reactions of Ni(I) N-Heterocyclic Carbene Complexes. Inorg Chem 2014; 53:7160-9. [DOI: 10.1021/ic500213h] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Rebecca C. Poulten
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2
7AY, U.K
| | - Isidoro López
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Paisos Catalans 16, E-43007 Tarragona, Spain
| | - Antoni Llobet
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Paisos Catalans 16, E-43007 Tarragona, Spain
| | - Mary F. Mahon
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2
7AY, U.K
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30
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López-Banet L, Santana MD, Piernas MJ, García G, Cerezo J, Requena A, Zúñiga J, Pérez J, García L. Structure and Spectroscopic Properties of Nickel Benzazolate Complexes with Hydrotris(pyrazolyl)borate Ligand. Inorg Chem 2014; 53:5502-14. [DOI: 10.1021/ic5001655] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Luisa López-Banet
- Departamento
de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - M. Dolores Santana
- Departamento
de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - María José Piernas
- Departamento
de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - Gabriel García
- Departamento
de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - Javier Cerezo
- Departamento de
Química Física, Universidad de Murcia, E-30071 Murcia, Spain
| | - Alberto Requena
- Departamento de
Química Física, Universidad de Murcia, E-30071 Murcia, Spain
| | - José Zúñiga
- Departamento de
Química Física, Universidad de Murcia, E-30071 Murcia, Spain
| | - José Pérez
- Departamento de Ingeniería
Minera, Geológica y Cartográfica, Área de Química
Inorgánica, Universidad Politécnica de Cartagena, E-30203 Cartagena, Spain
| | - Luís García
- Departamento de Ingeniería
Minera, Geológica y Cartográfica, Área de Química
Inorgánica, Universidad Politécnica de Cartagena, E-30203 Cartagena, Spain
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31
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Palacios L, Artigas MJ, Polo V, Lahoz FJ, Castarlenas R, Pérez-Torrente JJ, Oro LA. Hydroxo–Rhodium–N-Heterocyclic Carbene Complexes as Efficient Catalyst Precursors for Alkyne Hydrothiolation. ACS Catal 2013. [DOI: 10.1021/cs400739y] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Laura Palacios
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
| | - Maria Jose Artigas
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
| | - Victor Polo
- Departamento
de Química Física − Instituto de Biocomputación
y Física de Sistemas complejos (BIFI), Universidad de Zaragoza, Spain
| | - Fernando J. Lahoz
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
| | - Ricardo Castarlenas
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
- ARAID Foundation
| | - Jesús J. Pérez-Torrente
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
| | - Luis A. Oro
- Departamento
de Química Inorgánica − Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza − CSIC. C/Pedro Cerbuna 12, Zaragoza, Spain
- Center for Refining & Petrochemicals, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
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32
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Sankaralingam M, Vadivelu P, Suresh E, Palaniandavar M. Mixed ligand nickel(II) complexes as catalysts for alkane hydroxylation using m-chloroperbenzoic acid as oxidant. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.07.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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Tsujimoto Y, Yamaura K, Uchikoshi T. Extended Ni(III) Oxyhalide Perovskite Derivatives: Sr2NiO3X (X = F, Cl). Inorg Chem 2013; 52:10211-6. [DOI: 10.1021/ic402008n] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yoshihiro Tsujimoto
- Materials Processing Unit, National Institute for Materials Science, 1-2-1 Sengen,
Tsukuba, Ibaraki 305-0047, Japan
| | - Kazunari Yamaura
- Superconducting Materials Unit, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044,
Japan
| | - Tetsuo Uchikoshi
- Materials Processing Unit, National Institute for Materials Science, 1-2-1 Sengen,
Tsukuba, Ibaraki 305-0047, Japan
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34
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López‐Banet L, Santana MD, García G, Piernas MJ, García L, Pérez J, Calderón‐Casado A, Barandika G. Crystal Structures and Spectroscopic and Theoretical Properties of Pentacoordinate Nickel(II) Complexes Containing Tris(pyrazolyl)borate and Quinolinate Ligands. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300339] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Luisa López‐Banet
- Universidad de Murcia, Regional Campus of International Excellence “Campus Mare Nostrum” Dpto. Química Inorgánica, 30071 Murcia, Spain, Fax: +34‐868‐887458, http://www.um.es/
| | - M. Dolores Santana
- Universidad de Murcia, Regional Campus of International Excellence “Campus Mare Nostrum” Dpto. Química Inorgánica, 30071 Murcia, Spain, Fax: +34‐868‐887458, http://www.um.es/
| | - Gabriel García
- Universidad de Murcia, Regional Campus of International Excellence “Campus Mare Nostrum” Dpto. Química Inorgánica, 30071 Murcia, Spain, Fax: +34‐868‐887458, http://www.um.es/
| | - M. José Piernas
- Universidad de Murcia, Regional Campus of International Excellence “Campus Mare Nostrum” Dpto. Química Inorgánica, 30071 Murcia, Spain, Fax: +34‐868‐887458, http://www.um.es/
| | - Luis García
- Universidad Politécnica de Cartagena, Dpto. Ingeniería Minera, Geológica y Cartográfica (Área de Química Inorgánica), 30203 Cartagena (Murcia), Spain, http://www.upct.es/
| | - José Pérez
- Universidad Politécnica de Cartagena, Dpto. Ingeniería Minera, Geológica y Cartográfica (Área de Química Inorgánica), 30203 Cartagena (Murcia), Spain, http://www.upct.es/
| | - Ainhoa Calderón‐Casado
- Departamento de Mineralogía y Petrología, Facultad de Ciencia y Tecnología, Apdo. 644, 48080 Bilbao, Spain, http://www.ehu.es/p200‐home/es
| | - Gotzone Barandika
- Departamento de Química Inorgánica, Facultad de Farmacia, UPV/EHU, Paseo de la Universidad 7, 01006 Vitoria‐Gasteiz, Spain, http://www.ehu.es/p200‐home/es
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35
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Liang S, Chattopadhyay S, Petersen JL, Young VG, Jensen MP. Oxidative assembly of octahedral nickel(II)-tris(3,5-dimethylpyrazol-1-yl)methane (Tpm∗) complexes by reaction of Ni(COD)2 (COD=1,5-cyclooctadiene) with putative oxene and nitrene precursors. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.10.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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36
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Hikichi S, Hanaue K, Fujimura T, Okuda H, Nakazawa J, Ohzu Y, Kobayashi C, Akita M. Characterization of nickel(ii)-acylperoxo species relevant to catalytic alkanehydroxylation by nickel complex with mCPBA. Dalton Trans 2013; 42:3346-56. [DOI: 10.1039/c2dt32419a] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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37
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Ikeda A, Hoshino K, Komatsuzaki H, Satoh M, Nakazawa J, Hikichi S. O2 activation and external substrate oxidation capability of a Co(ii)–semiquinonato complex. NEW J CHEM 2013. [DOI: 10.1039/c3nj00215b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Fukuzumi S, Yamada Y, Karlin KD. Hydrogen Peroxide as a Sustainable Energy Carrier: Electrocatalytic Production of Hydrogen Peroxide and the Fuel Cell. Electrochim Acta 2012; 82:493-511. [PMID: 23457415 PMCID: PMC3584454 DOI: 10.1016/j.electacta.2012.03.132] [Citation(s) in RCA: 136] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This review describes homogeneous and heterogeneous catalytic reduction of dioxygen with metal complexes focusing on the catalytic two-electron reduction of dioxygen to produce hydrogen peroxide. Whether two-electron reduction of dioxygen to produce hydrogen peroxide or four-electron O2-reduction to produce water occurs depends on the types of metals and ligands that are utilized. Those factors controlling the two processes are discussed in terms of metal-oxygen intermediates involved in the catalysis. Metal complexes acting as catalysts for selective two-electron reduction of oxygen can be utilized as metal complex-modified electrodes in the electrocatalytic reduction to produce hydrogen peroxide. Hydrogen peroxide thus produced can be used as a fuel in a hydrogen peroxide fuel cell. A hydrogen peroxide fuel cell can be operated with a one-compartment structure without a membrane, which is certainly more promising for the development of low-cost fuel cells as compared with two compartment hydrogen fuel cells that require membranes. Hydrogen peroxide is regarded as an environmentally benign energy carrier because it can be produced by the electrocatalytic two-electron reduction of O2, which is abundant in air, using solar cells; the hydrogen peroxide thus produced could then be readily stored and then used as needed to generate electricity through the use of hydrogen peroxide fuel cells.
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Affiliation(s)
- Shunichi Fukuzumi
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
| | - Yusuke Yamada
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, ALCA, Japan Science and Technology Agency (JST), Suita, Osaka 565-0871, Japan
| | - Kenneth D. Karlin
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
- Department of Chemistry, The Johns Hopkins University, Baltimore, MD 21218, USA
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39
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Scorpionate nickel complexes with dicarboxylic acid ligands: influence of different spanning dicarboxylato co-ligands on the structures. TRANSIT METAL CHEM 2012. [DOI: 10.1007/s11243-012-9621-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Deb T, Rohde GT, Young VG, Jensen MP. Aerobic and Hydrolytic Decomposition of Pseudotetrahedral Nickel Phenolate Complexes. Inorg Chem 2012; 51:7257-70. [DOI: 10.1021/ic300551z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Tapash Deb
- Department
of Chemistry and
Biochemistry, Ohio University, Athens,
Ohio 45701, United States
| | - Gregory T. Rohde
- X-ray Crystallographic Facility,
Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Victor G. Young
- X-ray Crystallographic Facility,
Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Michael P. Jensen
- Department
of Chemistry and
Biochemistry, Ohio University, Athens,
Ohio 45701, United States
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41
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A set of new transition metal-based coordination complexes dependent upon Hpztza ligand (Hpztza=2-(5-(pyrazin-2-yl)-2H-tetrazol-2-yl) acetic acid). J SOLID STATE CHEM 2012. [DOI: 10.1016/j.jssc.2011.11.017] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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42
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López-Banet L, Santana MD, García G, Pérez J, García L, Lezama L, Liu M. Networks based on hydrogen-bonds containing phosphorus anions and tris(3,5-dimethylpyrazolyl)borate nickel(II) moieties. Polyhedron 2012. [DOI: 10.1016/j.poly.2011.10.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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43
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Nakazawa J, Ogiwara H, Kashiwazaki Y, Ishii A, Imamura N, Samejima Y, Hikichi S. Dioxygen activation and substrate oxygenation by a p-nitrothiophenolatonickel complex: unique effects of an acetonitrile solvent and the p-nitro group of the ligand. Inorg Chem 2011; 50:9933-5. [PMID: 21916455 DOI: 10.1021/ic201555f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The nickel(II) complex [Ni(Tp(Me2)) (SC(6)H(4)NO(2))] [1a; Tp(Me2) = hydrotris(3,5-dimethylpyrazol-1-yl)borate] reacts with O(2) to form the ligand oxygenation product ArSO(2)(-) in MeCN, and also 1a catalyzes the oxygenation of external substrates such as triphenylphosphine. The reactivity may correlate to the unique quinoid-like resonance structure of the thiophenolate ligand. The structure is stabilized by a p-nitro group and induced by coordination of MeCN.
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Affiliation(s)
- Jun Nakazawa
- Department of Material and Life Chemistry, Faculty of Engineering, Kanagawa University, 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama, 221-8686 Japan
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44
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Kuwamura N, Kitano K, Hirotsu M, Nishioka T, Teki Y, Santo R, Ichimura A, Hashimoto H, Wright LJ, Kinoshita I. Redox‐Controlled, Reversible Rearrangement of a Tris(2‐pyridylthio)methyl Ligand on Nickel to an Isomer with an “
N
,
S
‐Confused” 2‐Pyridylthiolate Arm. Chemistry 2011; 17:10708-15. [DOI: 10.1002/chem.201100875] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Naoto Kuwamura
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA)
- CREST (Japan) Science and Technology Agency, 4‐1‐8 Honcho Kawaguchi, Saitama 332‐0012 (Japan)
| | - Ken'ichi Kitano
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
| | - Masakazu Hirotsu
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
| | - Takanori Nishioka
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
| | - Yoshio Teki
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
| | - Ryoko Santo
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
| | - Akio Ichimura
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA)
| | - Hideki Hashimoto
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA)
- CREST (Japan) Science and Technology Agency, 4‐1‐8 Honcho Kawaguchi, Saitama 332‐0012 (Japan)
| | - L. James Wright
- Department of Chemistry, University of Auckland, Private Bag 92019, Auckland (New Zealand)
| | - Isamu Kinoshita
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA)
- CREST (Japan) Science and Technology Agency, 4‐1‐8 Honcho Kawaguchi, Saitama 332‐0012 (Japan)
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45
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Tonigold M, Lu Y, Mavrandonakis A, Puls A, Staudt R, Möllmer J, Sauer J, Volkmer D. Pyrazolate-Based Cobalt(II)-Containing Metal-Organic Frameworks in Heterogeneous Catalytic Oxidation Reactions: Elucidating the Role of Entatic States for Biomimetic Oxidation Processes. Chemistry 2011; 17:8671-95. [DOI: 10.1002/chem.201003173] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 02/23/2011] [Indexed: 11/07/2022]
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46
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Harding DJ, Harding P, Dokmaisrijan S, Adams H. Redox-active nickel and cobalt tris(pyrazolyl)borate dithiocarbamate complexes: air-stable Co(ii) dithiocarbamates. Dalton Trans 2011; 40:1313-21. [DOI: 10.1039/c0dt01010c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Balamurugan M, Mayilmurugan R, Suresh E, Palaniandavar M. Nickel(ii) complexes of tripodal 4N ligands as catalysts for alkane oxidation using m-CPBA as oxidant: ligand stereoelectronic effects on catalysis. Dalton Trans 2011; 40:9413-24. [DOI: 10.1039/c1dt10902b] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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48
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López-Banet L, Santana MD, García G, García L, Pérez J, Rojo T, Lezama L, Costes JP. Crystal Structures and Magnetic Properties of Nickel Complexes with Hydrotris(pyrazolyl)borate Ligand and Double Bridged by Phosphate Esters. Inorg Chem 2010; 50:437-43. [DOI: 10.1021/ic100980x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Luisa López-Banet
- Departamento de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - M. Dolores Santana
- Departamento de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - Gabriel García
- Departamento de Química Inorgánica, Universidad de Murcia, E-30071 Murcia, Spain
| | - Luis García
- Departamento de Ingeniería Minera, Geológica y Cartográfica, Área de Química Inorgánica, Universidad Politécnica de Cartagena, E-30203 Cartagena, Spain
| | - José Pérez
- Departamento de Ingeniería Minera, Geológica y Cartográfica, Área de Química Inorgánica, Universidad Politécnica de Cartagena, E-30203 Cartagena, Spain
| | - Teófilo Rojo
- Departamento de Química Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco, E-48080 Bilbao, Spain
| | - Luis Lezama
- Departamento de Química Inorgánica, Facultad de Ciencia y Tecnología, Universidad del País Vasco, E-48080 Bilbao, Spain
| | - Jean-Pierre Costes
- Laboratoire de Chimie de Coordination du CNRS, UPR 8241, liée par conventions à l’Université Paul Sabatier et à l’Institut National Polytechnique de Toulouse, 205 route de Narbonne, 31077 Toulouse Cedex, France
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49
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Company A, Yao S, Ray K, Driess M. Dioxygenase-Like Reactivity of an Isolable Superoxo-Nickel(II) Complex. Chemistry 2010; 16:9669-75. [DOI: 10.1002/chem.201001138] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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50
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Hikichi S, Kobayashi C, Yoshizawa M, Akita M. Tuning the Stability and Reactivity of Metal-bound Alkylperoxide by Remote Site Substitution of the Ligand. Chem Asian J 2010; 5:2086-92. [DOI: 10.1002/asia.201000183] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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