1
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Hashidoko A, Kitanosono T, Yamashita Y, Kobayashi S. Direct Aromatic Nitrosation Using 2-Methoxyethyl Nitrite as a NO Cation Source. Org Lett 2024; 26:5517-5521. [PMID: 38920086 DOI: 10.1021/acs.orglett.4c01856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
This work presents an acid-free method for aromatic nitrosation using 2-methoxyethyl nitrite (MOE-ONO). While originally developed as a NOx radical source in our group, we demonstrate the utility of MOE-ONO as a NO cation source for aromatic electrophilic nitrosation. This method successfully nitrosates phenols, naphthols, and other pronucleophiles, completely suppressing undesired nitration by NOx radicals. Notably, it enables nitrosation of acid-sensitive substrates, which has been difficult to achieve with existing protocols.
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Affiliation(s)
- Airu Hashidoko
- Department of Chemistry, School of Science, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Taku Kitanosono
- Department of Chemistry, School of Science, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Yasuhiro Yamashita
- Department of Chemistry, School of Science, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - Shu Kobayashi
- Department of Chemistry, School of Science, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
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2
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Baeza Cinco MÁ, Wu G, Hayton TW. Photolytic C-Diazeniumdiolate Disassembly in the β-Diketiminate Complexes [ MeLM(O 2N 2CPh 3)] (M = Fe, Co, Cu). Inorg Chem 2023; 62:14064-14071. [PMID: 37584511 DOI: 10.1021/acs.inorgchem.3c02188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/17/2023]
Abstract
The reaction of [K(18-crown-6)][O2N2CPh3] with [MeLCo(μ-Br)2Li(OEt2)] (MeL = {(2,6-iPr2C6H3)NC(Me)}2CH) generates the trityl diazeniumdiolate complex, [MeLCo(O2N2CPh3)] (1), in moderate yield. Similar metathesis reactions result in the formation of the Fe and Cu analogues, [MeLM(O2N2CPh3)] (Fe, 2; Cu, 3), which can also be isolated in moderate yields. Complexes 1-3 were characterized by ultraviolet-visible (UV-vis) spectroscopy, and their solid-state structures were determined by X-ray crystallography. These complexes were further characterized via 1H NMR spectroscopy (in the case of 1 and 2) or EPR spectroscopy (in the case of 3). Irradiation of complexes 1 and 2 with 371 nm light generates the known dinitrosyl complexes, [MeLM(NO)2] (M = Co, 4; Fe, 5), along with Ph3CH and 9-phenylfluorene. We propose that 4 and 5 are formed via the putative hyponitrite intermediates, [MeLM(κ2-O,O-ONNO)], which are formed by photoinduced homolysis of the C-N bond of the [O2N2CPh3] ligand. In contrast, irradiation of complex 3 with 371 nm light, in the presence of 1 equiv of PPh3, led to the formation of the Cu(I) complexes, [MeLCu(PPh3)], [(ArNCMeC(NO)CMeNAr)Cu(PPh3)] (6), and [(ArNCMeC(NO)CMeNAr)Cu]2 (7), of which the latter two are products of γ-nitrosation of the β-diketiminiate ligand. Also formed in this transformation are Ph3CN(H)OCPh3, Ph3PO, and N2O, along with trace amounts of NO.
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Affiliation(s)
- Miguel Á Baeza Cinco
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Guang Wu
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Trevor W Hayton
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
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3
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Seikh L, Dey S, Dhara S, Singh A, Lahiri GK. Inner-Sphere Electron Transfer Induced Reversible Electron Reservoir Feature of Azoheteroarene Bridged Diruthenium Frameworks. Inorg Chem 2022; 61:15735-15746. [PMID: 36129962 DOI: 10.1021/acs.inorgchem.2c02921] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This article demonstrates the stabilization of ground- and redox-induced metal-to-ligand charge transfer excited states on coordination of azo-coupled bmpd(L4) [bmpd = (E)-1,2-bis(1-methyl-1H-pyrazol-3-yl)diazene; L4 = -N═N-] to the electron-rich {Ru(acac)2} (acac = acetylacetonate) unit in mononuclear RuII(acac)2(L4) (1) and diastereomeric dinuclear (acac)2Ru2.5(μ-L4•-)Ru2.5(acac)2 [rac, ΔΔ/ΛΛ (2a)/meso, ΔΛ (2b)] complexes, respectively. It also develops further one-step intramolecular electron transfer induced L4•- bridged isovalent higher analogue [(acac)2RuIII(μ-L4•-)RuIII(acac)2]ClO4 in diastereomeric forms, rac-[2a]ClO4/meso-[2b]ClO4. On the contrary, under identical reaction conditions electronically and sterically permuted bimpd [L5, (E)-1,2-bis(4-iodo-1-methyl-1H-pyrazol-3-yl)diazene)] delivered mononuclear RuII(acac)2(L5) (3) as an exclusive product. Further, the generation of unprecedented heterotrinuclear complex [(acac)2RuII(μ-L4)AgI(μ-L4)RuII(acac)2]ClO4 ([4]ClO4) involving unreduced L4 via the reaction of 1 and AgClO4 revealed the absence of any inner-sphere electron transfer (IET) as in precursor 1, which in turn reaffirmed an IET (at the interface of electron-rich Ru(acac)2 and acceptor L4) mediated stabilization of 2. Structural authentication of the complexes with special reference to the tunable azo distance (N═N, N-N•-, N-N2-) of L and their spectro-electrochemical events in accessible redox states including the reversible electron reservoir feature of 2 → 2+/2+ → 2 were evaluated in conjunction with density functional theory/time-dependent density functional theory calculations. The varying extent of IET as a function of heteroaromatics appended to the azo group of L (L1 = abpy = 2,2'-azobipyridine, L2 = abbt = 2,2'-azobis(benzothiazole), L3 = abim = azobis(1-methylbenzimidazole), L4 and L5, Schemes 1 & 2) in the Ru(acac)2-derived respective molecular setup has been addressed.
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Affiliation(s)
- Liton Seikh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sanchaita Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Suman Dhara
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Aditi Singh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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4
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Ghosh P, Stauffer M, Hosseininasab V, Kundu S, Bertke JA, Cundari TR, Warren TH. NO Coupling at Copper to cis-Hyponitrite: N 2O Formation via Protonation and H-Atom Transfer. J Am Chem Soc 2022; 144:15093-15099. [PMID: 35948086 PMCID: PMC9536194 DOI: 10.1021/jacs.2c04033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Copper nitrite reductases (CuNIRs) convert NO2- to NO as well as NO to N2O under high NO flux at a mononuclear type 2 Cu center. While model complexes illustrate N-N coupling from NO that results in symmetric trans-hyponitrite [CuII]-ONNO-[CuII] complexes, we report NO assembly at a single Cu site in the presence of an external reductant Cp*2M (M = Co, Fe) to give the first copper cis-hyponitrites [Cp*2M]{[CuII](κ2-O2N2)[CuI]}. Importantly, the κ1-N-bound [CuI] fragment may be easily removed by the addition of mild Lewis bases such as CNAr or pyridine to form the spectroscopically similar anion {[CuII](κ2-O2N2)}-. The addition of electrophiles such as H+ to these anionic copper(II) cis-hyponitrites leads to N2O generation with the formation of the dicopper(II)-bis-μ-hydroxide [CuII]2(μ-OH)2. One-electron oxidation of the {[CuII](κ2-O2N2)}- core turns on H-atom transfer reactivity, enabling the oxidation of 9,10-dihydroanthracene to anthracene with concomitant formation of N2O and [CuII]2(μ-OH)2. These studies illustrate both the reductive coupling of NO at a single copper center and a way to harness the strong oxidizing power of nitric oxide via the neutral cis-hyponitrite [Cu](κ2-O2N2).
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Affiliation(s)
- Pokhraj Ghosh
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
- Department of Chemistry, Georgetown University, Washington, D. C. 20057, United States
| | - Molly Stauffer
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
- Department of Chemistry, Georgetown University, Washington, D. C. 20057, United States
| | | | - Subrata Kundu
- Department of Chemistry, Georgetown University, Washington, D. C. 20057, United States
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Kerala 695551, India
| | - Jeffery A. Bertke
- Department of Chemistry, Georgetown University, Washington, D. C. 20057, United States
| | - Thomas R. Cundari
- Department of Chemistry, University of North Texas, Denton, Texas 76203, United States
| | - Timothy H. Warren
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States
- Department of Chemistry, Georgetown University, Washington, D. C. 20057, United States
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5
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Lahiri GK, Panda S, Huang KW, Singh A, Dey S. Inner-sphere electron transfer at the ruthenium-azo interface. Dalton Trans 2022; 51:2547-2559. [DOI: 10.1039/d1dt03934b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal complexes exhibiting multiple reversible redox states have drawn continuing research interest due to their electron reservoir features. In this context, the present article described ruthenium-acac complexes (acac=acetylacetonate) incorporating redox-active...
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6
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Xu S, Yang D, Wang B, Chen Y, Ye S, Qu J. Generation of a Sulfinamide Species from Facile N-O Bond Cleavage of Nitrosobenzene by a Thiolate-Bridged Diiron Complex. J Am Chem Soc 2021; 143:17374-17387. [PMID: 34617736 DOI: 10.1021/jacs.1c03542] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The activation of nitrosobenzene promoted by transition-metal complexes has gained considerable interest due to its significance for understanding biological processes and catalytic C-N bond formation processes. Despite intensive studies in the past decades, there are only limited cases where electron-rich metal centers were commonly employed to achieve the N-O or C-N bond cleavage of the coordinated nitrosobenzene. In this regard, it is significant and challenging to construct a suitable functional system for examining its unique reactivity toward reductive activation of nitrosoarene. Herein, we present a {Fe2S2} functional platform that can activate nitrosobenzene via an unprecedented iron-directed thiolate insertion into the N-O bond to selectively generate a well-defined diiron benzenesulfinamide complex. Furthermore, computational studies support a proposal that in this concerted four-electron reduction process of nitrosobenzene the iron center serves as an important electron shuttle. Notably, compared to the intact bridging nitrosoarene ligand, the benzenesulfinamide moiety has priority to convert into aniline in the presence of separate or combined protons and reductants, which may imply the formation of the sulfinamide species accelerates reduction process of nitrosoarene. The reaction pattern presented here represents a novel activation mode of nitrosobenzene realized by a thiolate-bridged diiron complex.
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Affiliation(s)
- Sunlin Xu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China
| | - Dawei Yang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China
| | - Yifeng Chen
- State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, P.R. China.,School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
| | - Shengfa Ye
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P.R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China.,State Key Laboratory of Bioreactor Engineering, Shanghai Collaborative Innovation Centre for Biomanufacturing, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, P.R. China
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7
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Guan X, Zhu H, Driver TG. Cu-Catalyzed Cross-Coupling of Nitroarenes with Aryl Boronic Acids to Construct Diarylamines. ACS Catal 2021; 11:12417-12422. [PMID: 35433104 DOI: 10.1021/acscatal.1c03113] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The development and study of a simple copper-catalyzed reaction of nitroarenes with aryl boronic acids to form diarylamines that uses phenyl silane as the stoichiometric terminal reductant is described. This cross-coupling reaction requires as little as 2 mol % of CuX and 4 mol% of diphosphine for success and tolerates a broad range of functional groups on either the nitroarene or the aryl boronic acid with to afford the amine in good yield. Mechanistic investigations established that the cross-coupling reaction proceeds via a nitrosoarene intermediate and that copper is required to catalyze both the deoxygenation of the nitroarene to afford the nitrosoarene and C-NAr bond formation of the nitrosoarene with the aryl boronic acid.
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Affiliation(s)
- Xinyu Guan
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Haoran Zhu
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Tom G. Driver
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
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8
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Singh H, MacKay A, Sheibany N, Chen F, Mosser M, Rouet PÉ, Rousseau F, Askari MS, Ottenwaelder X. Intramolecular H-bond stabilization of a primary hydroxylamine in salen-type metal complexes. Chem Commun (Camb) 2021; 57:10403-10406. [PMID: 34545379 DOI: 10.1039/d1cc03077a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Primary hydroxylamines, RNHOH, decompose readily in the presence of transition metal ions. We show that this reactivity can be arrested by ligand design via an intramolecular hydrogen bond. Six metal complexes with an intact NHOH group were synthesized and crystallographically characterized. The Cu-hydroxylamine complexes can catalyze the aerobic oxidation of benzylic alcohols.
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Affiliation(s)
- Hardeep Singh
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC, Canada.
| | - Alyson MacKay
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC, Canada.
| | - Nooshin Sheibany
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC, Canada.
| | - Fei Chen
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC, Canada.
| | - Maëlle Mosser
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC, Canada.
| | - Pierre-Étienne Rouet
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC, Canada.
| | - Frédéric Rousseau
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC, Canada.
| | - Mohammad S Askari
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC, Canada.
| | - Xavier Ottenwaelder
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC, Canada.
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9
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Zimmermann P, Kilpatrick AFR, Ar D, Demeshko S, Cula B, Limberg C. Electron transfer within β-diketiminato nickel bromide and cobaltocene redox couples activating CO 2. Chem Commun (Camb) 2021; 57:875-878. [PMID: 33393537 DOI: 10.1039/d0cc06983c] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Reduction of β-diketiminato nickel(ii) complexes (LtBuNiII) to the corresponding nickel(i) compounds does not require alkali metal compounds but can also be performed with the milder cobaltocenes. LtBuNiBr and Cp2Co have rather similar redox potentials, so that the equilibrium with the corresponding electron transfer compound [LtBuNiIBr][Cp2CoIII] (ETC) clearly lies on the side of the starting materials. Still, the ETC portion can be used to activate CO2 yielding a mononuclear nickel(ii) carbonate complex and ETC can be isolated almost quantitatively from the solutions through crystallisation. The more negative reduction potential of Cp*2Co shifts the equilibrium formed with LtBuNiBr strongly towards the ETC and accordingly the reaction of such solutions with CO2 is much faster.
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Affiliation(s)
- Philipp Zimmermann
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - Alexander F R Kilpatrick
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - Deniz Ar
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - Serhiy Demeshko
- Universität Göttingen, Institut für Anorganische Chemie, Tammannstr. 4, D-37077 Göttingen, Germany
| | - Beatrice Cula
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
| | - Christian Limberg
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
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10
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Murru S, Mokar BD, Bista R, Harakat D, Le Bras J, Fronczek F, Nicholas KM, Srivastava RS. Copper-catalyzed asymmetric allylic C–H amination of alkenes using N-arylhydroxylamines. Org Chem Front 2021. [DOI: 10.1039/d1qo00223f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
The first Cu-catalyzed asymmetric allylic C–H amination of alkenes with N-aryl hydroxylamines has been developed. Metal-complexes isolation, ESI-MS analysis and the DFT calculations provided key insights on mechanistic pathway.
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Affiliation(s)
- Siva Murru
- Chemistry Program
- School of Sciences
- University of Louisiana at Monroe
- Louisiana 71209
- USA
| | - Bhanudas D. Mokar
- Department of Chemistry
- University of Louisiana at Lafayette
- Louisiana 70504
- USA
| | - Ramesh Bista
- Chemistry Program
- School of Sciences
- University of Louisiana at Monroe
- Louisiana 71209
- USA
| | - Dominique Harakat
- Institut de Chimie Moléculaire de Reims – UMR 7312 CNRS-Université de Reims Champagne-Ardenne UFR des Sciences Exactes et Naturelles
- 51687 REIMS Cedex 2
- France
| | - Jean Le Bras
- Institut de Chimie Moléculaire de Reims – UMR 7312 CNRS-Université de Reims Champagne-Ardenne UFR des Sciences Exactes et Naturelles
- 51687 REIMS Cedex 2
- France
| | - Frank Fronczek
- Department of Chemistry
- Louisiana State University
- Baton Rouge 70803
- USA
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11
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Huang YC, Chen HY, Chang YL, Vasanthakumar P, Chen SY, Kao CL, Wu CHY, Hsu SC. Synthesis of triisocyanomesitylene β‑diketiminato copper(I) complexes and evaluation of isocyanide π-back bonding. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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12
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Zsombor-Pindera J, Effaty F, Escomel L, Patrick B, Kennepohl P, Ottenwaelder X. Five Nitrogen Oxidation States from Nitro to Amine: Stabilization and Reactivity of a Metastable Arylhydroxylamine Complex. J Am Chem Soc 2020; 142:19023-19028. [PMID: 33124796 DOI: 10.1021/jacs.0c09300] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Redox noninnocent ligands enhance the reactivity of the metal they complex, a strategy used by metalloenzymes and in catalysis. Herein, we report a series of copper complexes with the same ligand framework, but with a pendant nitrogen group that spans five different redox states between nitro and amine. Of particular interest is the synthesis of a unprecedented copper(I)-arylhydroxylamine complex. While hydroxylamines typically disproportionate or decompose in the presence of transition metal ions, the reactivity of this metastable species is arrested by the presence of an intramolecular hydrogen bond. Two-electron oxidation yields a copper(II)-(arylnitrosyl radical) complex that can dissociate to a copper(I) species with uncoordinated arylnitroso. This combination of ligand redox noninnocence and hemilability provides opportunities in catalysis for two-electron chemistry via a one-electron copper(I/II) shuttle, as exemplified with an aerobic alcohol oxidation.
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Affiliation(s)
- Joseph Zsombor-Pindera
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC H4B 1R6, Canada.,Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Farshid Effaty
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC H4B 1R6, Canada
| | - Léon Escomel
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC H4B 1R6, Canada
| | - Brian Patrick
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Pierre Kennepohl
- Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Xavier Ottenwaelder
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC H4B 1R6, Canada
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13
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Askari MS, Effaty F, Gennarini F, Orio M, Le Poul N, Ottenwaelder X. Tuning Inner-Sphere Electron Transfer in a Series of Copper/Nitrosoarene Adducts. Inorg Chem 2020; 59:8678-8689. [PMID: 32073833 DOI: 10.1021/acs.inorgchem.9b03175] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A series of copper/nitrosoarene complexes was created that mimics several steps in biomimetic O2 activation by copper(I). The reaction of the copper(I) complex of N,N,N',N'-tetramethypropylenediamine with a series of para-substituted nitrosobenzene derivatives leads to adducts in which the nitrosoarene (ArNO) is reduced by zero, one, or two electrons, akin to the isovalent species dioxygen, superoxide, and peroxide, respectively. The geometric and electronic structures of these adducts were characterized by means of X-ray diffraction, vibrational analysis, ultraviolet-visible spectroscopy, NMR, electrochemistry, and density functional theory (DFT) calculations. The bonding mode of the NO moiety depends on the oxidation state of the ArNO moiety: κN for ArNO, mononuclear η2-NO and dinuclear μ-η2:η1 for ArNO•-, and dinuclear μ-η2:η2 for ArNO2-. 15N isotopic labeling confirms the reduction state by measuring the NO stretching frequency (1392 cm-1 for κN-ArNO, 1226 cm-1 for η2-ArNO•-, 1133 cm-1 for dinuclear μ-η2:η1-ArNO•-, and 875 cm-1 for dinuclear μ-η2:η2 for ArNO2-). The 15N NMR signal disappears for the ArNO•- species, establishing a unique diagnostic for the radical state. Electrochemical studies indicate reduction waves that are consistent with one-electron reduction of the adducts and are compared with studies performed on Cu-O2 analogues. DFT calculations were undertaken to confirm our experimental findings, notably to establish the nature of the charge-transfer transitions responsible for the intense green color of the complexes. In fine, this family of complexes is unique in that it walks through three redox states of the ArNO moiety while keeping the metal and its supporting ligand the same. This work provides snapshots of the reactivity of the toxic nitrosoarene molecules with the biologically relevant Cu(I) ion.
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Affiliation(s)
- Mohammad S Askari
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Farshid Effaty
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada
| | - Federica Gennarini
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada.,Laboratoire de Chimie, Électrochimie Moléculaires et Chimie Analytique, UMR, CNRS 6521, Université de Bretagne Occidentale, Brest 29238, France
| | - Maylis Orio
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2, Marseille 13007, France
| | - Nicolas Le Poul
- Laboratoire de Chimie, Électrochimie Moléculaires et Chimie Analytique, UMR, CNRS 6521, Université de Bretagne Occidentale, Brest 29238, France
| | - Xavier Ottenwaelder
- Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec H4B 1R6, Canada
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14
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15
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Chan SC, Wong CY. Recent developments in ruthenium–nitrosoarene chemistry: Unconventional synthetic strategies, new ligand designs, and exploration of ligands redox non-innocence. Coord Chem Rev 2020. [DOI: 10.1016/j.ccr.2019.213082] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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16
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Emhoff KA, Balaraman L, Salem AM, Mudarmah KI, Boyd WC. Coordination chemistry of organic nitric oxide derivatives. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.06.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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17
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Wang D, Leng X, Ye S, Deng L. Substrate Redox Non-innocence Inducing Stepwise Oxidative Addition Reaction: Nitrosoarene C-N Bond Cleavage on Low-Coordinate Cobalt(0) Species. J Am Chem Soc 2019; 141:7731-7735. [PMID: 31042868 DOI: 10.1021/jacs.9b03726] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The reactions of nitrosoarenes with transition-metal species are fundamentally important for their relevance to metal-catalyzed transformations of organo-nitrogen compounds in organic synthesis and also the metabolization of nitroarenes and anilines in biology. In addition to the well-known reactivity of metal-mediated N-O bond activation and cleavage of nitrosoarenes, we present herein the first observation of a nitrosoarene C-N bond oxidative addition reaction upon the interaction of a three-coordinate cobalt(0) species [(IPr)Co(vtms)2] with 2,4,6-tri( tert-butyl)-1-nitroso-benzene (Ar*NO). The reaction produces a cobalt nitrosyl aryl complex, [(IPr)Co(Ar*)(NO)] (1), with a bis(nitrosoarene)cobalt complex, [(IPr)Co(η2-ONAr)(κ1- O-ONAr)] (2), as an intermediate. Spectroscopic characterizations, DFT calculations, and kinetic studies revealed that the redox non-innocence of nitrosoarene induces a stepwise pathway for the C-N bond oxidative addition reaction.
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Affiliation(s)
- Dongyang Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China
| | - Xuebing Leng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China
| | - Shengfa Ye
- Max-Planck-Institut für Kohlenforschung , Kaiser-Wilhelm-Platz 1 , Mülheim an der Ruhr D-45470 , Germany
| | - Liang Deng
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry , University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Lingling Road , Shanghai 200032 , P. R. China
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18
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Ferretti E, Dechert S, Meyer F. Reductive Binding and Ligand-Based Redox Transformations of Nitrosobenzene at a Dinickel(II) Core. Inorg Chem 2019; 58:5154-5162. [DOI: 10.1021/acs.inorgchem.9b00256] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eleonora Ferretti
- Institut für Anorganische Chemie, Universität Göttingen, Tammanstrasse 4, D-37077 Göttingen, Germany
| | - Sebastian Dechert
- Institut für Anorganische Chemie, Universität Göttingen, Tammanstrasse 4, D-37077 Göttingen, Germany
| | - Franc Meyer
- Institut für Anorganische Chemie, Universität Göttingen, Tammanstrasse 4, D-37077 Göttingen, Germany
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19
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Dey S, Panda S, Ghosh P, Lahiri GK. Electronically Triggered Switchable Binding Modes of the C-Organonitroso (ArNO) Moiety on the {Ru(acac)2} Platform. Inorg Chem 2019; 58:1627-1637. [DOI: 10.1021/acs.inorgchem.8b03191] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sanchaita Dey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sanjib Panda
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Prabir Ghosh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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20
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Alvarez MA, García ME, García-Vivó D, Ramos A, Ruiz MA, Toyos A. N-O Bond Activation and Cleavage Reactions of the Nitrosyl-Bridged Complexes [M 2Cp 2(μ-PCy 2)(μ-NO)(NO) 2] (M = Mo, W). Inorg Chem 2018; 57:15314-15329. [PMID: 30461277 DOI: 10.1021/acs.inorgchem.8b02647] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The title complexes (1a,b) were prepared in two steps by first reacting the hydrides [M2Cp2(μ-H)(μ-PCy2)(CO)4] with [NO](BF4) in the presence of Na2CO3 to give dinitrosyls [M2Cp2(μ-PCy2)(CO)2(NO)2](BF4), which were then fully decarbonylated upon reaction with NaNO2 at 323 K. An isomer of the Mo2 complex having a cisoid arrangement of the terminal ligands ( cis-1a) was prepared upon irradiation of toluene solutions of 1a with visible-UV light at 288 K. The structure of these trinitrosyl complexes was investigated using X-ray diffraction and density functional theory (DFT) calculations, these revealing a genuine pyramidalization of the bridging NO that might be associated in part to an increase of charge at the N atom and anticipated a weakening of the N-O bond upon reaction with bases or reducing reagents. Complexes 1a,b reacted with [FeCp2](BF4) to give first the radicals [M2Cp2(μ-PCy2)(μ-NO)(NO)2](BF4) according to CV experiments, which then underwent H-abstraction to yield the nitroxyl-bridged complexes [M2Cp2(μ-PCy2)(μ-κ1:η2-HNO)(NO)2](BF4), alternatively prepared upon protonation with HBF4·OEt2. The novel coordination mode of the nitroxyl ligand in these products was thermodynamically favored over its tautomeric hydroximido form, according to DFT calculations, and similar nitrosomethane-bridged cations [M2Cp2(μ-PCy2)( μ-κ1:η2-MeNO)(NO)2]+ were prepared by reacting 1a,b with CF3SO3Me or [Me3O]BF4. Complexes 1 reacted with M(Hg) (M = Zn, Na) in tetrahydrofuran to give the amido-bridged derivatives [M2Cp2(μ-PCy2)(μ-NH2)(NO)2] with retention of stereochemistry, a transformation also induced by using mild O atom scavengers such as CO and phosphites in the presence of water. In the absence of water, phosphites accomplished a deoxygenation of the bridging NO of the Mo2 complexes to yield the phosphoraniminato-bridged derivatives [Mo2Cp2(μ-PCy2){μ-NP(OR)3}(NO)2] (R = Et, Ph), also with retention of stereochemistry.
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Affiliation(s)
- M Angeles Alvarez
- Departamento de Química Orgánica e Inorgánica/IUQOEM , Universidad de Oviedo , E-33071 Oviedo , Spain
| | - M Esther García
- Departamento de Química Orgánica e Inorgánica/IUQOEM , Universidad de Oviedo , E-33071 Oviedo , Spain
| | - Daniel García-Vivó
- Departamento de Química Orgánica e Inorgánica/IUQOEM , Universidad de Oviedo , E-33071 Oviedo , Spain
| | - Alberto Ramos
- Departamento de Química Orgánica e Inorgánica/IUQOEM , Universidad de Oviedo , E-33071 Oviedo , Spain
| | - Miguel A Ruiz
- Departamento de Química Orgánica e Inorgánica/IUQOEM , Universidad de Oviedo , E-33071 Oviedo , Spain
| | - Adrián Toyos
- Departamento de Química Orgánica e Inorgánica/IUQOEM , Universidad de Oviedo , E-33071 Oviedo , Spain
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21
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Desat ME, Kretschmer R. En Route to Bis-Carbene Analogues of the Heavier Group 13 Elements: Consideration of Bridging Group and Metal(I) Source. Chemistry 2018; 24:12397-12404. [PMID: 29897617 DOI: 10.1002/chem.201800925] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Indexed: 11/11/2022]
Abstract
With the aim of exploring the effect of steric constraints imposed on the metal-metal interaction of bis-carbene analogues of thallium by the linking scaffold, seven dinuclear thallium diyls with a series of rigid, semirigid, and flexible bridging scaffolds were synthesized. The solid-state molecular structures were determined for four of these compounds by single-crystal XRD and compared with the results of DFT calculations, which were performed for all substances. These compounds serve as models to investigate the metal-metal distance in the absence of co-coordinated molecules (additional ligands, solvent molecules). In addition, the effect of the metal(I) precursor, and more specifically the counterion, on the synthetic access to bis-carbene analogues of indium and thallium was investigated. For indium, only InI yields the desired dinuclear indium diyl. With InBr no reaction was observed, and using InCl gave rise to a mononuclear indium(III) compound. For thallium, both TlI and TlBr allow access to the related bis-carbene analogue, although the yield with the latter is significantly lower. In contrast, no reactions were observed with TlCl and TlBF4 .
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Affiliation(s)
- Marcella E Desat
- Institut für Anorganische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Robert Kretschmer
- Institut für Anorganische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
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22
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Effaty F, Zsombor-Pindera J, Kazakova A, Girard B, Askari MS, Ottenwaelder X. Ligand and electronic effects on copper–arylnitroso self-assembly. NEW J CHEM 2018. [DOI: 10.1039/c8nj00894a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The topology and degree of electron transfer in self-assembled redox reactions between copper(i) species and nitrosoarenes are controlled by ligand properties.
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Affiliation(s)
- F. Effaty
- Department of Chemistry and Biochemistry
- Concordia University
- Montreal
- Canada
| | - J. Zsombor-Pindera
- Department of Chemistry and Biochemistry
- Concordia University
- Montreal
- Canada
| | - A. Kazakova
- Department of Chemistry and Biochemistry
- Concordia University
- Montreal
- Canada
| | - B. Girard
- Department of Chemistry and Biochemistry
- Concordia University
- Montreal
- Canada
| | - M. S. Askari
- Department of Chemistry and Biochemistry
- Concordia University
- Montreal
- Canada
| | - X. Ottenwaelder
- Department of Chemistry and Biochemistry
- Concordia University
- Montreal
- Canada
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23
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Sasi D, Ramkumar V, Murthy NN. Bite-Angle-Regulated Coordination Geometries: Tetrahedral and Trigonal Bipyramidal in Ni(II) with Biphenyl-Appended (2-Pyridyl)alkylamine N, N'-Bidentate Ligands. ACS OMEGA 2017; 2:2474-2481. [PMID: 31457593 PMCID: PMC6640959 DOI: 10.1021/acsomega.7b00119] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 05/17/2017] [Indexed: 06/10/2023]
Abstract
Two simple biphenyl-appended (2-pyridyl)alkylamine N-bidentate ligands, Le and Lm, having ethylene and methylene spacers between donor groups, with bite angles Le ≈ 100° and Lm ≈ 80°, dictate pseudotetrahedral and trigonal-bipyramidal geometries in six high-spin Ni(II)-halide complexes, [Ni(Le)X2] and [Ni(Lm)2X](ClO4) (where X = Cl-, Br-, I-), respectively. The structures in the solid state, determined using X-ray crystallography, and in solution, determined using spectroscopic methods (UV-vis-NIR and paramagnetic 1H NMR), which complement each other, are described.
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24
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Deka H, Ghosh S, Gogoi K, Saha S, Mondal B. Nitric Oxide Reactivity of a Cu(II) Complex of an Imidazole-Based Ligand: Aromatic C-Nitrosation Followed by the Formation of N-Nitrosohydroxylaminato Complex. Inorg Chem 2017; 56:5034-5040. [PMID: 28387516 DOI: 10.1021/acs.inorgchem.7b00069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A binuclear Cu(II) complex, 1, [Cu2(L-)2(OAc)](OAc) of imidazole-based ligand LH {LH = 2-(bis(2-ethyl-5-methyl-1H-imidazol-4-yl)methyl)phenol} was synthesized and characterized spectroscopically and structurally. Addition of an equivalent amount of nitric oxide (NO) by a gastight syringe to the acetonitrile:methanol (5:1, v/v) solution of complex 1 at room temperature resulted in the reduction of Cu(II) center to Cu(I) with concomitant C-nitrosation of the ligand. Spectroscopic characterization of the resulting Cu(I) complex (1a) of the C-nitrosylated ligand, L' {L' = 2-(bis(2-ethyl-5-methyl-1H-imidazol-4-yl)methyl)-4-nitroso-phenol} has been done. The Cu(I) complex, 1a, further reacted with NO to result in the corresponding N-nitrosohydroxylaminato complex, 2, [Cu2(L-ONNO)2](OAc)2 through the formation of a Cu(I)-nitrosyl intermediate. A small fraction of the nitrosyl intermediate decomposed to the corresponding Cu(II) complex 3, [Cu(L')2], and N2O in a parallel reaction.
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Affiliation(s)
- Hemanta Deka
- Department of Chemistry, Indian Institute of Technology Guwahati , North Guwahati, Assam 781039, India
| | - Somnath Ghosh
- Department of Chemistry, Indian Institute of Technology Guwahati , North Guwahati, Assam 781039, India
| | - Kuldeep Gogoi
- Department of Chemistry, Indian Institute of Technology Guwahati , North Guwahati, Assam 781039, India
| | - Soumen Saha
- Department of Chemistry, Indian Institute of Technology Guwahati , North Guwahati, Assam 781039, India
| | - Biplab Mondal
- Department of Chemistry, Indian Institute of Technology Guwahati , North Guwahati, Assam 781039, India
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25
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Waldie KM, Ramakrishnan S, Kim SK, Maclaren JK, Chidsey CED, Waymouth RM. Multielectron Transfer at Cobalt: Influence of the Phenylazopyridine Ligand. J Am Chem Soc 2017; 139:4540-4550. [DOI: 10.1021/jacs.7b01047] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Kate M. Waldie
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | | | - Sung-Kwan Kim
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Jana K. Maclaren
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | | | - Robert M. Waymouth
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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26
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Chuang WJ, Hsu SP, Chand K, Yu FL, Tsai CL, Tseng YH, Lu YH, Kuo JY, Carey JR, Chen HY, Chen HY, Chiang MY, Hsu SCN. Reactivity Study of Unsymmetrical β-Diketiminato Copper(I) Complexes: Effect of the Chelating Ring. Inorg Chem 2017; 56:2722-2735. [PMID: 28225607 DOI: 10.1021/acs.inorgchem.6b02876] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
β-Diketiminato copper(I) complexes play important roles in bioinspired catalytic chemistry and in applications to the materials industry. However, it has been observed that these complexes are very susceptible to disproportionation. Coordinating solvents or Lewis bases are typically used to prevent disproportionation and to block the coordination sites of the copper(I) center from further decomposition. Here, we incorporate this coordination protection directly into the molecule in order to increase the stability and reactivity of these complexes and to discover new copper(I) binding motifs. Here we describe the synthesis, structural characterization, and reactivity of a series of unsymmetrical N-aryl-N'-alkylpyridyl β-diketiminato copper(I) complexes and discuss the structures and reactivity of these complexes with respect to the length of the pyridyl arm. All of the aforementioned unsymmetrical ß-diketiminato copper(I) complexes bind CO reversibly and are stable to disproportionation. The binding ability of CO and the rate of pyridyl ligand decoordination of these copper(I) complexes are directly related to the competition between the degree of puckering of the chelate system and the steric demands of the N-aryl substituent.
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Affiliation(s)
- Wan-Jung Chuang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Sung-Po Hsu
- Department of Physiology, School of Medicine, College of Medicine, Taipei Medical University , Taipei 110, Taiwan.,Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University , Taipei 110, Taiwan
| | - Kuldeep Chand
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Fu-Lun Yu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Cheng-Long Tsai
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Yu-Hsuan Tseng
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Yuh-Hsiu Lu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Jen-Yu Kuo
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - James R Carey
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan.,Department of Applied Chemistry, National University of Kaohsiung , Kaohsiung 804, Taiwan
| | - Hsuan-Ying Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Hsing-Yin Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
| | - Michael Y Chiang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan.,Department of Chemistry, National Sun Yat-Sen University , Kaohsiung 804, Taiwan
| | - Sodio C N Hsu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University , Kaohsiung 807, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital , Kaohsiung 807, Taiwan
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27
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Zimmermann P, Limberg C. Activation of Small Molecules at Nickel(I) Moieties. J Am Chem Soc 2017; 139:4233-4242. [DOI: 10.1021/jacs.6b12434] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Philipp Zimmermann
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Christian Limberg
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
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28
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Phanopoulos A, Warren M, White AJP, Horton A, Crimmin MR. Isolation of an unusual [Cu 6] nanocluster through sequential addition of copper(i) to a polynucleating ligand. Dalton Trans 2017; 46:2077-2080. [PMID: 28133681 DOI: 10.1039/c6dt04703c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Addition of 2 equiv. of CuI to a [Cu]4 multimetallic complex results in cluster formation leading to the isolation of a rare bicapped tetrahedral [Cu6I2] cluster that is stabilised by two conformationally constrained polynucleating ligands.
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Affiliation(s)
- Andreas Phanopoulos
- Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK.
| | - Mark Warren
- Diamond Light Source Ltd, Diamond House, Harwell Science & Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK
| | - Andrew J P White
- Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK.
| | - Andrew Horton
- PTI/DX Emerging Technologies, Shell Global Solutions International B.V, P.O. Box 38000, 1030 BN Amsterdam, The Netherlands
| | - Mark R Crimmin
- Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK.
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29
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Lin CY, Power PP. Complexes of Ni(i): a “rare” oxidation state of growing importance. Chem Soc Rev 2017; 46:5347-5399. [DOI: 10.1039/c7cs00216e] [Citation(s) in RCA: 125] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The synthesis and diverse structures, reactivity (small molecule activation and catalysis) and magnetic properties of Ni(i) complexes are summarized.
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Affiliation(s)
- Chun-Yi Lin
- Department of Chemistry
- University of California
- Davis
- USA
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30
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Kundu S, Stieber SCE, Ferrier MG, Kozimor SA, Bertke JA, Warren TH. Redox Non‐Innocence of Nitrosobenzene at Nickel. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605026] [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)
- Subrata Kundu
- Department of Chemistry Georgetown University Box 571227 Washington DC 20057-1227 USA
| | - S. Chantal E. Stieber
- Inorganic, Isotope and Actinide Chemistry, Los Alamos National Laboratory Los Alamos NM 87545 USA
- Department of Chemistry and Biochemistry California State Polytechnic University Pomona CA 91768 USA
| | - Maryline G. Ferrier
- Inorganic, Isotope and Actinide Chemistry, Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Stosh A. Kozimor
- Inorganic, Isotope and Actinide Chemistry, Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Jeffery A. Bertke
- Department of Chemistry Georgetown University Box 571227 Washington DC 20057-1227 USA
| | - Timothy H. Warren
- Department of Chemistry Georgetown University Box 571227 Washington DC 20057-1227 USA
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31
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Kundu S, Stieber SCE, Ferrier MG, Kozimor SA, Bertke JA, Warren TH. Redox Non‐Innocence of Nitrosobenzene at Nickel. Angew Chem Int Ed Engl 2016; 55:10321-5. [DOI: 10.1002/anie.201605026] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Indexed: 02/06/2023]
Affiliation(s)
- Subrata Kundu
- Department of Chemistry Georgetown University Box 571227 Washington DC 20057-1227 USA
| | - S. Chantal E. Stieber
- Inorganic, Isotope and Actinide Chemistry, Los Alamos National Laboratory Los Alamos NM 87545 USA
- Department of Chemistry and Biochemistry California State Polytechnic University Pomona CA 91768 USA
| | - Maryline G. Ferrier
- Inorganic, Isotope and Actinide Chemistry, Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Stosh A. Kozimor
- Inorganic, Isotope and Actinide Chemistry, Los Alamos National Laboratory Los Alamos NM 87545 USA
| | - Jeffery A. Bertke
- Department of Chemistry Georgetown University Box 571227 Washington DC 20057-1227 USA
| | - Timothy H. Warren
- Department of Chemistry Georgetown University Box 571227 Washington DC 20057-1227 USA
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32
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Hao J, Vabre B, Zargarian D. Reactions of Phenylhydrosilanes with Pincer–Nickel Complexes: Evidence for New Si–O and Si–C Bond Formation Pathways. J Am Chem Soc 2015; 137:15287-98. [PMID: 26562478 DOI: 10.1021/jacs.5b10066] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jingjun Hao
- Département
de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Boris Vabre
- Département
de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
| | - Davit Zargarian
- Département
de Chimie, Université de Montréal, Montréal, Québec H3C 3J7, Canada
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33
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Manesis AC, Shafaat HS. Electrochemical, Spectroscopic, and Density Functional Theory Characterization of Redox Activity in Nickel-Substituted Azurin: A Model for Acetyl-CoA Synthase. Inorg Chem 2015; 54:7959-67. [PMID: 26234790 DOI: 10.1021/acs.inorgchem.5b01103] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Nickel-containing enzymes are key players in global hydrogen, carbon dioxide, and methane cycles. Many of these enzymes rely on Ni(I) oxidation states in critical catalytic intermediates. However, due to the highly reactive nature of these species, their isolation within metalloenzymes has often proved elusive. In this report, we describe and characterize a model biological Ni(I) species that has been generated within the electron transfer protein, azurin. Replacement of the native copper cofactor with nickel is shown to preserve the redox activity of the protein. The Ni(II/I) couple is observed at -590 mV versus NHE, with an interfacial electron transfer rate of 70 s(-1). Chemical reduction of Ni(II)Az generates a stable species with strong absorption features at 350 nm and a highly anisotropic, axial EPR signal with principal g-values of 2.56 and 2.10. Density functional theory calculations provide insight into the electronic and geometric structure of the Ni(I) species, suggesting a trigonal planar coordination environment. The predicted spectroscopic features of this low-coordinate nickel site are in good agreement with the experimental data. Molecular orbital analysis suggests potential for both metal-centered and ligand-centered reactivity, highlighting the covalency of the metal-thiolate bond. Characterization of a stable Ni(I) species within a model protein has implications for understanding the mechanisms of complex enzymes, including acetyl coenzyme A synthase, and developing scaffolds for unique reactivity.
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Barnett BR, Labios LA, Moore CE, England J, Rheingold AL, Wieghardt K, Figueroa JS. Solution Dynamics of Redox Noninnocent Nitrosoarene Ligands: Mapping the Electronic Criteria for the Formation of Persistent Metal-Coordinated Nitroxide Radicals. Inorg Chem 2015; 54:7110-21. [DOI: 10.1021/acs.inorgchem.5b01252] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Brandon R. Barnett
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093-0358, United States
| | - Liezel A. Labios
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093-0358, United States
| | - Curtis E. Moore
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093-0358, United States
| | - Jason England
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse
34−36, D-45470 Mülheim an der Ruhr, Germany
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093-0358, United States
| | - Karl Wieghardt
- Max Planck Institute for Chemical Energy Conversion, Stiftstrasse
34−36, D-45470 Mülheim an der Ruhr, Germany
| | - Joshua S. Figueroa
- Department of Chemistry and Biochemistry, University of California San Diego, 9500 Gilman Drive, MC 0358, La Jolla, California 92093-0358, United States
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Askari MS, Orio M, Ottenwaelder X. Controlled nitrene transfer from a tyrosinase-like arylnitroso-copper complex. Chem Commun (Camb) 2015; 51:11206-9. [PMID: 26077731 DOI: 10.1039/c5cc02806j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction between p-nitrosonitrobenzene and the tetramethylpropylenediamine-copper(i) complex yields a dinuclear complex that is structurally and electronically similar to side-on peroxo species known in Cu/O2 chemistry. The complex reacts with di-tert-butylphenolate via nitrene transfer, as observed through an intermediate and the aminophenol product obtained upon reductive work-up.
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Affiliation(s)
- Mohammad S Askari
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QC H4B 1R6, Canada.
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Tomson NC, Williams KD, Dai X, Sproules S, DeBeer S, Warren TH, Wieghardt K. Re-evaluating the Cu K pre-edge XAS transition in complexes with covalent metal-ligand interactions. Chem Sci 2015; 6:2474-2487. [PMID: 29308158 PMCID: PMC5647745 DOI: 10.1039/c4sc03294b] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 02/11/2015] [Indexed: 01/10/2023] Open
Abstract
Three [Me2NN]Cu(η2-L2) complexes (Me2NN = HC[C(Me)NAr]2; L2 = PhNO (2), (3), PhCH[double bond, length as m-dash]CH2 (4); Ar = 2,6-Me2-C6H3; ArF = 3,5-(CF3)2-C6H3) have been studied by Cu K-edge X-ray absorption spectroscopy, as well as single- and multi-reference computational methods (DFT, TD-DFT, CASSCF, MRCI, and OVB). The study was extended to a range of both known and theoretical compounds bearing 2p-element donors as a means of deriving a consistent view of how the pre-edge transition energy responds in systems with significant ground state covalency. The ground state electronic structures of many of the compounds under investigation were found to be strongly influenced by correlation effects, resulting in ground state descriptions with majority contributions from a configuration comprised of a Cu(ii) metal center anti-ferromagentically coupled to radical anion O2, PhNO, and ligands. In contrast, the styrene complex 4, which displays a Cu K pre-edge transition despite its formal d10 electron configuration, exhibits what can best be described as a Cu(i):(styrene)0 ground state with strong π-backbonding. The Cu K pre-edge features for these complexes increase in energy from 1 to 4, a trend that was tracked to the percent Cu(ii)-character in the ground state. The unexpected shift to higher pre-edge transition energies with decreasing charge on copper (Q Cu) contributed to an assignment of the pre-edge features for these species as arising from metal-to-ligand charge transfer instead of the traditional Cu1s → Cu3d designation.
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Affiliation(s)
- Neil C Tomson
- Max Planck Institute for Chemical Energy Conversion , Stiftstrasse 34-36 , 45470 Mülheim an der Ruhr , Germany . ;
| | - Kamille D Williams
- Department of Chemistry , Georgetown University , Box 571227-1227 , Washington, D. C. 20057 , USA .
| | - Xuliang Dai
- Department of Chemistry , Georgetown University , Box 571227-1227 , Washington, D. C. 20057 , USA .
| | - Stephen Sproules
- Max Planck Institute for Chemical Energy Conversion , Stiftstrasse 34-36 , 45470 Mülheim an der Ruhr , Germany . ;
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion , Stiftstrasse 34-36 , 45470 Mülheim an der Ruhr , Germany . ;
- Department of Chemistry and Chemical Biology , Cornell University , Ithaca , NY 14853 , USA
| | - Timothy H Warren
- Department of Chemistry , Georgetown University , Box 571227-1227 , Washington, D. C. 20057 , USA .
| | - Karl Wieghardt
- Max Planck Institute for Chemical Energy Conversion , Stiftstrasse 34-36 , 45470 Mülheim an der Ruhr , Germany . ;
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Arikawa Y, Yamaguchi S, Otsubo Y, Onishi M, Umakoshi K. Ortho−Nitrosation of Anilines on a Ruthenium Hydridotris(pyrazolyl)borato Complex and Oxidation of the Resulting Coordinated Amine Groups. Organometallics 2015. [DOI: 10.1021/om5012769] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yasuhiro Arikawa
- Division of Chemistry and Materials Science, Graduate School of Engineering, and ‡Department of
Applied Chemistry, Faculty of Engineering, Nagasaki University, Bunkyo-machi 1-14, Nagasaki 852-8521, Japan
| | - Soseki Yamaguchi
- Division of Chemistry and Materials Science, Graduate School of Engineering, and ‡Department of
Applied Chemistry, Faculty of Engineering, Nagasaki University, Bunkyo-machi 1-14, Nagasaki 852-8521, Japan
| | - Yuji Otsubo
- Division of Chemistry and Materials Science, Graduate School of Engineering, and ‡Department of
Applied Chemistry, Faculty of Engineering, Nagasaki University, Bunkyo-machi 1-14, Nagasaki 852-8521, Japan
| | - Masayoshi Onishi
- Division of Chemistry and Materials Science, Graduate School of Engineering, and ‡Department of
Applied Chemistry, Faculty of Engineering, Nagasaki University, Bunkyo-machi 1-14, Nagasaki 852-8521, Japan
| | - Keisuke Umakoshi
- Division of Chemistry and Materials Science, Graduate School of Engineering, and ‡Department of
Applied Chemistry, Faculty of Engineering, Nagasaki University, Bunkyo-machi 1-14, Nagasaki 852-8521, Japan
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Hao J, Vabre B, Zargarian D. POCOP-Ligated Nickel Siloxide Complexes: Syntheses, Characterization, and Reactivities. Organometallics 2014. [DOI: 10.1021/om500916d] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Jingjun Hao
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | - Boris Vabre
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | - Davit Zargarian
- Département de Chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
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Rettenmeier C, Wadepohl H, Gade LH. Stereoselective Hydrodehalogenation via a Radical-Based Mechanism Involving T-Shaped Chiral Nickel(I) Pincer Complexes. Chemistry 2014; 20:9657-65. [DOI: 10.1002/chem.201403243] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Indexed: 11/12/2022]
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Li Y, Lei Y, Gao M, Chen W, Li G. Atmospheric reactivity of ethylene catalyzed by β‐diketiminato Ni(II)/methylaluminoxane system. Appl Organomet Chem 2014. [DOI: 10.1002/aoc.3146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yongfei Li
- School of Materials and Chemical EngineeringXi'an Technological University Xi'an 710032 China
| | - Yaping Lei
- School of Materials and Chemical EngineeringXi'an Technological University Xi'an 710032 China
| | - Meili Gao
- School of Life Science and TechnologyXi'an Jiaotong University Xi'an 710049 China
| | - Weixing Chen
- School of Materials and Chemical EngineeringXi'an Technological University Xi'an 710032 China
| | - Gaohong Li
- School of Materials and Chemical EngineeringXi'an Technological University Xi'an 710032 China
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Barbon SM, Staroverov VN, Boyle PD, Gilroy JB. Hydrogen-bond-supported dimeric boron complexes of potentially tetradentate β-diketiminate ligands. Dalton Trans 2014; 43:240-50. [DOI: 10.1039/c3dt52188e] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Williams KD, Cardenas AJP, Oliva JD, Warren TH. CopperC-Nitroso Compounds: Activation of Hydroxylamines and NO Reactivity. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300378] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wiese S, Aguila MJB, Kogut E, Warren TH. β-Diketiminato Nickel Imides in Catalytic Nitrene Transfer to Isocyanides. Organometallics 2013. [DOI: 10.1021/om300909n] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Stefan Wiese
- Department of Chemistry, Georgetown University, Box 571227-1227, Washington,
D.C. 20057 United States
| | - Mae Joanne B. Aguila
- Department of Chemistry, Georgetown University, Box 571227-1227, Washington,
D.C. 20057 United States
| | - Elzbieta Kogut
- Department of Chemistry, Georgetown University, Box 571227-1227, Washington,
D.C. 20057 United States
| | - Timothy H. Warren
- Department of Chemistry, Georgetown University, Box 571227-1227, Washington,
D.C. 20057 United States
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Affiliation(s)
- Raymond T. Gephart
- Department of Chemistry, Georgetown University, Box 571227-1227,
Washington, D.C. 20057, United States
| | - Timothy H. Warren
- Department of Chemistry, Georgetown University, Box 571227-1227,
Washington, D.C. 20057, United States
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Kozhukh J, Fedoce Lopes J, Dos Santos HF, Lippard SJ. Reactions of Organozinc Thiolates with Nitrosonium Ion: C-Nitroso Formation by Possible Transnitrosation. Organometallics 2012. [DOI: 10.1021/om300922m] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Julia Kozhukh
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Juliana Fedoce Lopes
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Hélio F. Dos Santos
- Núcleo de Estudos em Química
Computacional, Departamento de
Química-ICE, Universidade Federal de Juiz de Fora, Campus Universitário, 36036-330,
Juiz de Fora-MG, Brazil
| | - Stephen J. Lippard
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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Kozhukh J, Lippard SJ. Zinc thiolate reactivity toward nitrogen oxides: insights into the interaction of Zn2+ with S-nitrosothiols and implications for nitric oxide synthase. Inorg Chem 2012; 51:7346-53. [PMID: 22702952 DOI: 10.1021/ic3007684] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Zinc thiolate complexes containing N(2)S tridentate ligands were prepared to investigate their reactivity toward reactive nitrogen species, chemistry proposed to occur at the zinc tetracysteine thiolate site of nitric oxide synthase (NOS). The complexes are unreactive toward nitric oxide (NO) in the absence of dioxygen, strongly indicating that NO cannot be the species directly responsible for S-nitrosothiol formation and loss of Zn(2+) at the NOS dimer interface in vivo. S-Nitrosothiol formation does occur upon exposure of zinc thiolate solutions to NO in the presence of air, however, or to NO(2) or NOBF(4), indicating that these reactive nitrogen/oxygen species are capable of liberating zinc from the enzyme, possibly through generation of the S-nitrosothiol. Interaction between simple Zn(2+) salts and preformed S-nitrosothiols leads to decomposition of the -SNO moiety, resulting in release of gaseous NO and N(2)O. The potential biological relevance of this chemistry is discussed.
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Affiliation(s)
- Julia Kozhukh
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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Gephart RT, Huang DL, Aguila MJB, Schmidt G, Shahu A, Warren TH. Catalytic CH Amination with Aromatic Amines. Angew Chem Int Ed Engl 2012; 51:6488-92. [DOI: 10.1002/anie.201201921] [Citation(s) in RCA: 134] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2012] [Indexed: 11/10/2022]
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49
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Gephart RT, Huang DL, Aguila MJB, Schmidt G, Shahu A, Warren TH. Catalytic CH Amination with Aromatic Amines. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201921] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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