51
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Qian YY, Lee MH, Yang W, Chan KS. Aryl carbon–chlorine (Ar–Cl) and aryl carbon–fluorine (Ar–F) bond cleavages by rhodium porphyrins. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.05.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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52
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Jurss JW, Khnayzer RS, Panetier JA, El Roz KA, Nichols EM, Head-Gordon M, Long JR, Castellano FN, Chang CJ. Bioinspired design of redox-active ligands for multielectron catalysis: effects of positioning pyrazine reservoirs on cobalt for electro- and photocatalytic generation of hydrogen from water. Chem Sci 2015; 6:4954-4972. [PMID: 29142725 PMCID: PMC5664355 DOI: 10.1039/c5sc01414j] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Accepted: 06/09/2015] [Indexed: 01/18/2023] Open
Abstract
Mononuclear metalloenzymes in nature can function in cooperation with precisely positioned redox-active organic cofactors in order to carry out multielectron catalysis. Inspired by the finely tuned redox management of these bioinorganic systems, we present the design, synthesis, and experimental and theoretical characterization of a homologous series of cobalt complexes bearing redox-active pyrazines. These donor moieties are locked into key positions within a pentadentate ligand scaffold in order to evaluate the effects of positioning redox non-innocent ligands on hydrogen evolution catalysis. Both metal- and ligand-centered redox features are observed in organic as well as aqueous solutions over a range of pH values, and comparison with analogs bearing redox-inactive zinc(ii) allows for assignments of ligand-based redox events. Varying the geometric placement of redox non-innocent pyrazine donors on isostructural pentadentate ligand platforms results in marked effects on observed cobalt-catalyzed proton reduction activity. Electrocatalytic hydrogen evolution from weak acids in acetonitrile solution, under diffusion-limited conditions, reveals that the pyrazine donor of axial isomer 1-Co behaves as an unproductive electron sink, resulting in high overpotentials for proton reduction, whereas the equatorial pyrazine isomer complex 2-Co is significantly more active for hydrogen generation at lower voltages. Addition of a second equatorial pyrazine in complex 3-Co further minimizes overpotentials required for catalysis. The equatorial derivative 2-Co is also superior to its axial 1-Co congener for electrocatalytic and visible-light photocatalytic hydrogen generation in biologically relevant, neutral pH aqueous media. Density functional theory calculations (B3LYP-D2) indicate that the first reduction of catalyst isomers 1-Co, 2-Co, and 3-Co is largely metal-centered while the second reduction occurs at pyrazine. Taken together, the data establish that proper positioning of non-innocent pyrazine ligands on a single cobalt center is indeed critical for promoting efficient hydrogen catalysis in aqueous media, akin to optimally positioned redox-active cofactors in metalloenzymes. In a broader sense, these findings highlight the significance of electronic structure considerations in the design of effective electron-hole reservoirs for multielectron transformations.
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Affiliation(s)
- Jonah W Jurss
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Department of Chemistry and Biochemistry , University of Mississippi , University , MS 38677 , USA
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Rony S Khnayzer
- Department of Chemistry , North Carolina State University , Raleigh , NC 27695-8204 , USA .
- Department of Natural Sciences , Lebanese American University , Beirut 1102-2801 , Chouran , Lebanon
| | - Julien A Panetier
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Karim A El Roz
- Department of Chemistry , North Carolina State University , Raleigh , NC 27695-8204 , USA .
| | - Eva M Nichols
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Martin Head-Gordon
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Jeffrey R Long
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
| | - Felix N Castellano
- Department of Chemistry , North Carolina State University , Raleigh , NC 27695-8204 , USA .
| | - Christopher J Chang
- Department of Chemistry , University of California , Berkeley , California 94720 , USA . ; ;
- Department of Molecular and Cell Biology , University of California , Berkeley , California 94720 , USA
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , USA
- Howard Hughes Medical Institute , University of California , Berkeley , California 94720 , USA
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53
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Lindley BM, Wolczanski PT, Cundari TR, Lobkovsky EB. First-Row Transition Metal and Lithium Pyridine-ene-amide Complexes Exhibiting N- and C-Isomers and Ligand-Based Activation of Benzylic C–H Bonds. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00385] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Brian M. Lindley
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Peter T. Wolczanski
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Thomas R. Cundari
- Department of Chemistry, Center for Advanced
Scientific Computing and Modeling (CASCaM), University of North Texas, Box 305070, Denton, Texas 76203-5070, United States
| | - Emil B. Lobkovsky
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
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54
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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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55
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Wang M, Weyhermüller T, Wieghardt K. Determining the Electronic Structure of a Series of [(phen)3M]0(M = Ti, V, Mo) and [(pdi)2M]n+(M = Cr, Mo) Complexes: Coordination of Neutral Ligands vs. π-Radical Anions. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500420] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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56
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Reed BR, Stoian SA, Lord RL, Groysman S. The aldimine effect in bis(imino)pyridine complexes: non-planar nickel(I) complexes of a bis(aldimino)pyridine ligand. Chem Commun (Camb) 2015; 51:6496-9. [PMID: 25659596 DOI: 10.1039/c5cc00203f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reduction of bis(aldimino)pyridine nickel(II) dihalide forms a non-planar bis(aldimino)pyridine nickel(I) halide. Unlike the previously reported square-planar bis(ketimino)pyridine nickel chloride, for which the spin density was localized on the ligand, the present species demonstrate N(py)-Ni-X angles of 156°-162° and significant spin density at the metal inferred from EPR measurements and DFT calculations.
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Affiliation(s)
- Blake R Reed
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
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57
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Kim YE, Kim J, Lee Y. Formation of a nickel carbon dioxide adduct and its transformation mediated by a Lewis acid. Chem Commun (Camb) 2015; 50:11458-61. [PMID: 25070370 DOI: 10.1039/c4cc04800h] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
An uncommon nickel dinitrogen adduct and its tendency toward CO2 binding are investigated using a (PP(Me)P)Ni scaffold. (PP(Me)P)Ni(N2) (1) and {(PP(Me)P)Ni}2(μ-N2) (2) were prepared and their treatment with CO2 revealed the formation of (PP(Me)P)Ni(η(2)-CO2) (3). This is a new type of CO2 binding for a zero-valent nickel center supported by three donor ligands, reminiscent of the CODH active site environment. Clear unique structural differences in 3 are evident when compared with previous 4-coordinate Ni-CO2 adducts. Compound 3 when treated with B(C6F5)3 gives the Lewis acid-base adduct (PP(Me)P)Ni{COOB(C6F5)3} (4) possessing a Ni-μ-CO2-κ(2)C,O-B moiety.
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Affiliation(s)
- Yeong-Eun Kim
- Department of Chemistry, KAIST, Daejeon 305-701, Republic of Korea.
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58
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Palmer WN, Diao T, Pappas I, Chirik PJ. High-Activity Cobalt Catalysts for Alkene Hydroboration with Electronically Responsive Terpyridine and α-Diimine Ligands. ACS Catal 2014. [DOI: 10.1021/cs501639r] [Citation(s) in RCA: 141] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- W. Neil Palmer
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Tianning Diao
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Iraklis Pappas
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Paul J. Chirik
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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59
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Darmon J, Yu RP, Semproni SP, Turner ZR, Stieber SCE, DeBeer S, Chirik PJ. Electronic Structure Determination of Pyridine N-Heterocyclic Carbene Iron Dinitrogen Complexes and Neutral Ligand Derivatives. Organometallics 2014; 33:5423-5433. [PMID: 25328270 PMCID: PMC4195514 DOI: 10.1021/om500727t] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Indexed: 01/17/2023]
Abstract
The electronic structures of pyridine N-heterocyclic dicarbene (iPrCNC) iron complexes have been studied by a combination of spectroscopic and computational methods. The goal of these studies was to determine if this chelate engages in radical chemistry in reduced base metal compounds. The iron dinitrogen example (iPrCNC)Fe(N2)2 and the related pyridine derivative (iPrCNC)Fe(DMAP)(N2) were studied by NMR, Mössbauer, and X-ray absorption spectroscopy and are best described as redox non-innocent compounds with the iPrCNC chelate functioning as a classical π acceptor and the iron being viewed as a hybrid between low-spin Fe(0) and Fe(II) oxidation states. This electronic description has been supported by spectroscopic data and DFT calculations. Addition of N,N-diallyl-tert-butylamine to (iPrCNC)Fe(N2)2 yielded the corresponding iron diene complex. Elucidation of the electronic structure again revealed the CNC chelate acting as a π acceptor with no evidence for ligand-centered radicals. This ground state is in contrast with the case for the analogous bis(imino)pyridine iron complexes and may account for the lack of catalytic [2π + 2π] cycloaddition reactivity.
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Affiliation(s)
- Jonathan
M. Darmon
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Renyuan Pony Yu
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Scott P. Semproni
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Zoë R. Turner
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - S. Chantal E. Stieber
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Serena DeBeer
- Max-Planck
Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
- Department
of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York 14835, United
States
| | - Paul J. Chirik
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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60
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Murray LJ, Weare WW, Shearer J, Mitchell AD, Abboud KA. Isolation of a (Dinitrogen)Tricopper(I) Complex. J Am Chem Soc 2014; 136:13502-5. [DOI: 10.1021/ja506445d] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Leslie J. Murray
- Department
of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Walter W. Weare
- Department
of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, United States
| | - Jason Shearer
- Department
of Chemistry, University of Nevada, Reno, Reno, Nevada 89557, United States
| | - Alyssa D. Mitchell
- Department
of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
| | - Khalil A. Abboud
- Department
of Chemistry, Center for Catalysis, University of Florida, Gainesville, Florida 32611, United States
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61
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Komeyama K, Okamoto Y, Takaki K. Cobalt-Catalyzed Formal [4+2] Cycloaddition of α,α′-Dichloro-ortho-Xylenes with Alkynes. Angew Chem Int Ed Engl 2014; 53:11325-8. [DOI: 10.1002/anie.201406807] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Indexed: 11/11/2022]
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62
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Komeyama K, Okamoto Y, Takaki K. Cobalt-Catalyzed Formal [4+2] Cycloaddition of α,α′-Dichloro-ortho-Xylenes with Alkynes. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406807] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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63
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Lacy DC, McCrory CCL, Peters JC. Studies of cobalt-mediated electrocatalytic CO2 reduction using a redox-active ligand. Inorg Chem 2014; 53:4980-8. [PMID: 24773584 PMCID: PMC4033636 DOI: 10.1021/ic403122j] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Indexed: 01/04/2023]
Abstract
The cobalt complex [Co(III)N4H(Br)2](+) (N4H = 2,12-dimethyl-3,7,11,17-tetraazabicyclo-[11.3.1]-heptadeca-1(7),2,11,13,15-pentaene) was used for electrocatalytic CO2 reduction in wet MeCN with a glassy carbon working electrode. When water was employed as the proton source (10 M in MeCN), CO was produced (fCO= 45% ± 6.4) near the Co(I/0) redox couple for [Co(III)N4H(Br)2](+) (E1/2 = -1.88 V FeCp2(+/0)) with simultaneous H2 evolution (fH2= 30% ± 7.8). Moreover, we successfully demonstrated that the catalytically active species is homogeneous through the use of control experiments and XPS studies of the working glassy-carbon electrodes. As determined by cyclic voltammetry, CO2 catalysis occurred near the formal Co(I/0)redox couple, and attempts were made to isolate the triply reduced compound ("[Co(0)N4H]"). Instead, the doubly reduced ("Co(I)") compounds [CoN4] and [CoN4H(MeCN)](+) were isolated and characterized by X-ray crystallography. Their molecular structures prompted DFT studies to illuminate details regarding their electronic structure. The results indicate that reducing equivalents are stored on the ligand, implicating redox noninnocence in the ligands for H2 evolution and CO2 reduction electrocatalysis.
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Affiliation(s)
- David C. Lacy
- Joint Center
for Artificial Photosynthesis, Division of Chemistry and Chemical
Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Charles C. L. McCrory
- Joint Center
for Artificial Photosynthesis, Division of Chemistry and Chemical
Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Jonas C. Peters
- Joint Center
for Artificial Photosynthesis, Division of Chemistry and Chemical
Engineering, California Institute of Technology, Pasadena, California 91125, United States
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64
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Salanouve E, Bouzemame G, Blanchard S, Derat E, Desage-El Murr M, Fensterbank L. Tandem CH Activation/Arylation Catalyzed by Low-Valent Iron Complexes with Bisiminopyridine Ligands. Chemistry 2014; 20:4754-61. [DOI: 10.1002/chem.201304459] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Indexed: 11/09/2022]
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65
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Liu CR, Qian YY, Chan KS. Base-promoted aryl–bromine bond cleavage with cobalt(ii) porphyrins via a halogen atom transfer mechanism. Dalton Trans 2014; 43:7771-9. [DOI: 10.1039/c4dt00155a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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66
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Chang MC, Otten E. Synthesis and ligand-based reduction chemistry of boron difluoride complexes with redox-active formazanate ligands. Chem Commun (Camb) 2014; 50:7431-3. [DOI: 10.1039/c4cc03244f] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Mono(formazanate) boron difluoride complexes (LBF2), which show remarkably facile and reversible ligand-based redox-chemistry, were synthesized by transmetallation of bis(formazanate) zinc complexes with boron trifluoride.
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Affiliation(s)
- M.-C. Chang
- Stratingh Institute for Chemistry
- University of Groningen Nijenborgh 4
- 9747 AG Groningen, The Netherlands
| | - E. Otten
- Stratingh Institute for Chemistry
- University of Groningen Nijenborgh 4
- 9747 AG Groningen, The Netherlands
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67
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Harman WH, Lin TP, Peters JC. A d10Ni-(H2) Adduct as an Intermediate in HH Oxidative Addition across a NiB Bond. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201308175] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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68
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Harman WH, Lin TP, Peters JC. A d10Ni-(H2) Adduct as an Intermediate in HH Oxidative Addition across a NiB Bond. Angew Chem Int Ed Engl 2013; 53:1081-6. [DOI: 10.1002/anie.201308175] [Citation(s) in RCA: 132] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Indexed: 11/08/2022]
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69
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Van Damme N, Lough AJ, Gorelsky SI, Lemaire MT. Molecular and Electronic Structures of Complexes Containing 1-(2-pyridylazo)-2-phenanthrol (PAPL): Revisiting a Redox-Active Ligand. Inorg Chem 2013; 52:13021-8. [DOI: 10.1021/ic401618u] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Natasha Van Damme
- Department of Chemistry, Brandon University, Brandon, Manitoba R7A 6A9, Canada
| | - Alan J. Lough
- Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
| | - Serge I. Gorelsky
- Center for Catalysis Research and Innovation,
Department of Chemistry, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Martin T. Lemaire
- Department of Chemistry, Brandon University, Brandon, Manitoba R7A 6A9, Canada
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70
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Flock J, Suljanovic A, Torvisco A, Schoefberger W, Gerke B, Pöttgen R, Fischer RC, Flock M. The Role of 2,6-Diaminopyridine Ligands in the Isolation of an Unprecedented, Low-Valent Tin Complex. Chemistry 2013; 19:15504-17. [DOI: 10.1002/chem.201301340] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Indexed: 11/10/2022]
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71
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Yu RP, Darmon JM, Milsmann C, Margulieux GW, E. Stieber SC, DeBeer S, Chirik PJ. Catalytic hydrogenation activity and electronic structure determination of bis(arylimidazol-2-ylidene)pyridine cobalt alkyl and hydride complexes. J Am Chem Soc 2013; 135:13168-84. [PMID: 23968297 PMCID: PMC3799879 DOI: 10.1021/ja406608u] [Citation(s) in RCA: 166] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The bis(arylimidazol-2-ylidene)pyridine cobalt methyl complex, ((iPr)CNC)CoCH3, was evaluated for the catalytic hydrogenation of alkenes. At 22 °C and 4 atm of H2 pressure, ((iPr)CNC)CoCH3 is an effective precatalyst for the hydrogenation of sterically hindered, unactivated alkenes such as trans-methylstilbene, 1-methyl-1-cyclohexene, and 2,3-dimethyl-2-butene, representing one of the most active cobalt hydrogenation catalysts reported to date. Preparation of the cobalt hydride complex, ((iPr)CNC)CoH, was accomplished by hydrogenation of ((iPr)CNC)CoCH3. Over the course of 3 h at 22 °C, migration of the metal hydride to the 4-position of the pyridine ring yielded (4-H2-(iPr)CNC)CoN2. Similar alkyl migration was observed upon treatment of ((iPr)CNC)CoH with 1,1-diphenylethylene. This reactivity raised the question as to whether this class of chelate is redox-active, engaging in radical chemistry with the cobalt center. A combination of structural, spectroscopic, and computational studies was conducted and provided definitive evidence for bis(arylimidazol-2-ylidene)pyridine radicals in reduced cobalt chemistry. Spin density calculations established that the radicals were localized on the pyridine ring, accounting for the observed reactivity, and suggest that a wide family of pyridine-based pincers may also be redox-active.
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Affiliation(s)
- Renyuan Pony Yu
- Department of Chemistry, Princeton University, Princeton, New Jersey, U. S. A. 08544
| | - Jonathan M. Darmon
- Department of Chemistry, Princeton University, Princeton, New Jersey, U. S. A. 08544
| | - Carsten Milsmann
- Department of Chemistry, Princeton University, Princeton, New Jersey, U. S. A. 08544
| | - Grant W. Margulieux
- Department of Chemistry, Princeton University, Princeton, New Jersey, U. S. A. 08544
| | - S. Chantal E. Stieber
- Department of Chemistry, Princeton University, Princeton, New Jersey, U. S. A. 08544
| | - Serena DeBeer
- Max-Planck Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
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72
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Eiβler A, Kläring P, Emmerling F, Braun T. α‐Dialdimine Complexes of Rhodium(I) and Iridium(I): Their Reactivity with Dioxygen and Dihydrogen. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300625] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anna Eiβler
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
| | - Paul Kläring
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
| | - Franziska Emmerling
- BAM Federal Institute for Materials Research and Testing, Richard‐Willstätter‐Str. 11, 12489 Berlin, Germany
| | - Thomas Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
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73
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Hojilla Atienza CC, Milsmann C, Semproni SP, Turner ZR, Chirik PJ. Reversible Carbon–Carbon Bond Formation Induced by Oxidation and Reduction at a Redox-Active Cobalt Complex. Inorg Chem 2013; 52:5403-17. [DOI: 10.1021/ic400352r] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
| | - Carsten Milsmann
- Department of Chemistry, Princeton
University, Princeton,
New Jersey 08544, United States
| | - Scott P. Semproni
- Department of Chemistry, Princeton
University, Princeton,
New Jersey 08544, United States
| | - Zoë R. Turner
- Department of Chemistry, Princeton
University, Princeton,
New Jersey 08544, United States
| | - Paul J. Chirik
- Department of Chemistry, Princeton
University, Princeton,
New Jersey 08544, United States
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74
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Shuster V, Gambarotta S, Nikiforov GB, Budzelaar PHM. Heterometallic Aluminum–Chromium Phenazine and Thiophenazine Complexes. Formation of a Tetranuclear Chromium(I) Sandwich Complex. Organometallics 2013. [DOI: 10.1021/om3012097] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vladimir Shuster
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
| | - Sandro Gambarotta
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
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75
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Andino JG, Mazumder S, Pal K, Caulton KG. Neue Ansätze zur Funktionalisierung von metallkoordiniertem N2. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209168] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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76
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Andino JG, Mazumder S, Pal K, Caulton KG. New Approaches to Functionalizing Metal-Coordinated N2. Angew Chem Int Ed Engl 2013; 52:4726-32. [DOI: 10.1002/anie.201209168] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Indexed: 11/08/2022]
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77
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Li J, Zhang K, Huang H, Yu A, Hu H, Cui H, Cui C. Synthesis and Reactions of a Redox-Active α-Diimine Aluminum Complex. Organometallics 2013. [DOI: 10.1021/om300920y] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Jianfeng Li
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s
Republic of China
| | - Kun Zhang
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s
Republic of China
| | - Hanmin Huang
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s
Republic of China
| | - Ao Yu
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s
Republic of China
| | - Hongfan Hu
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s
Republic of China
| | - Haiyan Cui
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s
Republic of China
| | - Chunming Cui
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, People’s
Republic of China
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78
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Khaskin E, Diskin-Posner Y, Weiner L, Leitus G, Milstein D. Formal loss of an H radical by a cobalt complex via metal–ligand cooperation. Chem Commun (Camb) 2013; 49:2771-3. [DOI: 10.1039/c3cc39049g] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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79
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Williams VA, Hulley EB, Wolczanski PT, Lancaster KM, Lobkovsky EB. Exploring the limits of redox non-innocence: pseudo square planar [{κ4-Me2C(CH2NCHpy)2}Ni]n (n = 2+, 1+, 0, −1, −2) favor Ni(ii). Chem Sci 2013. [DOI: 10.1039/c3sc50743b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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80
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Tondreau AM, Stieber SCE, Milsmann C, Lobkovsky E, Weyhermüller T, Semproni SP, Chirik PJ. Oxidation and Reduction of Bis(imino)pyridine Iron Dinitrogen Complexes: Evidence for Formation of a Chelate Trianion. Inorg Chem 2012; 52:635-46. [DOI: 10.1021/ic301675t] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Aaron M. Tondreau
- Department
of Chemistry, Princeton University, Princeton,
New Jersey, 08544, United States
| | - S. Chantal E. Stieber
- Department
of Chemistry, Princeton University, Princeton,
New Jersey, 08544, United States
| | - Carsten Milsmann
- Department
of Chemistry, Princeton University, Princeton,
New Jersey, 08544, United States
| | - Emil Lobkovsky
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York, 14853, United
States
| | - Thomas Weyhermüller
- Max-Planck Institute for Chemical Energy Conversion, Stiftstrasse
34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Scott P. Semproni
- Department
of Chemistry, Princeton University, Princeton,
New Jersey, 08544, United States
| | - Paul J. Chirik
- Department
of Chemistry, Princeton University, Princeton,
New Jersey, 08544, United States
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81
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Liddle BJ, Wanniarachchi S, Hewage JS, Lindeman SV, Bennett B, Gardinier JR. Electronic communication across diamagnetic metal bridges: a homoleptic gallium(III) complex of a redox-active diarylamido-based ligand and its oxidized derivatives. Inorg Chem 2012; 51:12720-8. [PMID: 23163736 DOI: 10.1021/ic301437f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Complexes with cations of the type [Ga(L)(2)](n+) where L = bis(4-methyl-2-(1H-pyrazol-1-yl)phenyl)amido and n = 1, 2, 3 have been prepared and structurally characterized. The electronic properties of each were probed by electrochemical and spectroscopic means and were interpreted with the aid of density functional theory (DFT) calculations. The dication, best described as [Ga(L(-))(L(0))](2+), is a Robin-Day class II mixed-valence species. As such, a broad, weak, solvent-dependent intervalence charge transfer (IVCT) band was found in the NIR spectrum in the range 6390-6925 cm(-1), depending on the solvent. Band shape analyses and the use of Hush and Marcus relations revealed a modest electronic coupling, H(ab) of about 200 cm(-1), and a large rate constant for electron transfer, k(et), on the order of 10(10) s(-1) between redox active ligands. The dioxidized complex [Ga(L(0))(2)](3+) shows a half-field ΔM(s) = 2 transition in its solid-state X-band electron paramagnetic resonance (EPR) spectrum at 5 K, which indicates that the triplet state is thermally populated. DFT calculations (M06/Def2-SV(P)) suggest that the singlet state is 21.7 cm(-1) lower in energy than the triplet state.
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Affiliation(s)
- Brendan J Liddle
- Department of Chemistry, Marquette University, Milwaukee, Wisconsin 53201-1881, United States
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82
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Connelly SJ, Zimmerman AC, Kaminsky W, Heinekey DM. Synthesis, structure, and reactivity of a nickel dihydrogen complex. Chemistry 2012; 18:15932-4. [PMID: 23138965 DOI: 10.1002/chem.201203675] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Indexed: 11/06/2022]
Abstract
Hydrogen activation by nickel: A tBuPCP pincer ligand facilitates formation of cationic Ni(II) dihydrogen and terminal dinitrogen complexes. The compounds have been characterized by X-ray crystallography and NMR spectroscopy. Addition of base promotes heterolytic cleavage of H(2) to form the corresponding neutral hydride complex.
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Affiliation(s)
- Samantha J Connelly
- Department of Chemistry, University of Washington, Box 351700, Seattle, WA, 98195-1700, USA
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83
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Shuster V, Gambarotta S, Nikiforov GB, Korobkov I, Budzelaar PHM. Radical Cleavage of Al–C Bonds Promoted by Phenazine: From Noninnocent Ligand to Radical Abstractor. Organometallics 2012. [DOI: 10.1021/om300889m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vladimir Shuster
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
| | - Sandro Gambarotta
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
| | | | - Ilia Korobkov
- Department of Chemistry, University of Ottawa, Ottawa, Ontario, Canada
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84
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Imler GH, Lu Z, Kistler KA, Carroll PJ, Wayland BB, Zdilla MJ. Complexes of 2,5-Bis(α-pyridyl)pyrrolate with Pd(II) and Pt(II): A Monoanionic Iso-π-Electron Ligand Analog of Terpyridine. Inorg Chem 2012; 51:10122-8. [DOI: 10.1021/ic300435t] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gregory H. Imler
- Department
of Chemistry, Temple
University, 1901 N. 13th St. Philadelphia, Pennsylvania 19122, United
States
| | - Zhi Lu
- Department of Chemistry,
University
of Pennsylvania, 231 S. 34 Street, Philadelphia, Pennsylvania 19104,
United States
| | - Kurt A. Kistler
- Department
of Chemistry, Penn
State Brandywine, 25 Yearsley Mill Road, Media, Pennsylvania 19063,
United States
| | - Patrick J. Carroll
- Department of Chemistry,
University
of Pennsylvania, 231 S. 34 Street, Philadelphia, Pennsylvania 19104,
United States
| | - Bradford B. Wayland
- Department
of Chemistry, Temple
University, 1901 N. 13th St. Philadelphia, Pennsylvania 19122, United
States
| | - Michael J. Zdilla
- Department
of Chemistry, Temple
University, 1901 N. 13th St. Philadelphia, Pennsylvania 19122, United
States
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85
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Qian YY, Chan KS. Base-Promoted Aryl Carbon–Iodine and Carbon–Bromine Bond Cleavage with Rhodium Porphyrin Complexes: Scope and Mechanism. Organometallics 2012. [DOI: 10.1021/om300441p] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ying Ying Qian
- Department of Chemistry, The Chinese University of Hong Kong,
Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Kin Shing Chan
- Department of Chemistry, The Chinese University of Hong Kong,
Shatin, New Territories, Hong Kong, People’s Republic of China
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86
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Zhu D, Korobkov I, Budzelaar PHM. Radical Mechanisms in the Reaction of Organic Halides with Diiminepyridine Cobalt Complexes. Organometallics 2012. [DOI: 10.1021/om300182c] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Di Zhu
- Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Ilia Korobkov
- Department of Chemistry, University of Ottawa, Ottawa, ON K1N 6N5, Canada
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87
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Semproni SP, Milsmann C, Chirik PJ. Side-on Dinitrogen Complexes of Titanocenes with Disubstituted Cyclopentadienyl Ligands: Synthesis, Structure, and Spectroscopic Characterization. Organometallics 2012. [DOI: 10.1021/om300156z] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Scott P. Semproni
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Carsten Milsmann
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Paul J. Chirik
- Department
of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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88
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Scarborough CC, Lancaster KM, DeBeer S, Weyhermüller T, Sproules S, Wieghardt K. Experimental Fingerprints for Redox-Active Terpyridine in [Cr(tpy)2](PF6)n (n = 3–0), and the Remarkable Electronic Structure of [Cr(tpy)2]1–. Inorg Chem 2012; 51:3718-32. [DOI: 10.1021/ic2027219] [Citation(s) in RCA: 107] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Christopher C. Scarborough
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36,
D-45470 Mülheim an der Ruhr, Germany
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta Georgia
30322, United States
| | - Kyle M. Lancaster
- Department
of Chemistry and Chemical
Biology, Cornell University, Ithaca, New
York 14853, United States
| | - Serena DeBeer
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36,
D-45470 Mülheim an der Ruhr, Germany
- Department
of Chemistry and Chemical
Biology, Cornell University, Ithaca, New
York 14853, United States
| | - Thomas Weyhermüller
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36,
D-45470 Mülheim an der Ruhr, Germany
| | - Stephen Sproules
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36,
D-45470 Mülheim an der Ruhr, Germany
- EPSRC National UK EPR Facility
and Service, Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, United
Kingdom
| | - Karl Wieghardt
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36,
D-45470 Mülheim an der Ruhr, Germany
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89
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Stieber SCE, Milsmann C, Hoyt JM, Turner ZR, Finkelstein KD, Wieghardt K, DeBeer S, Chirik PJ. Bis(imino)pyridine iron dinitrogen compounds revisited: differences in electronic structure between four- and five-coordinate derivatives. Inorg Chem 2012; 51:3770-85. [PMID: 22394054 DOI: 10.1021/ic202750n] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The electronic structures of the four- and five-coordinate aryl-substituted bis(imino)pyridine iron dinitrogen complexes, ((iPr)PDI)FeN(2) and ((iPr)PDI)Fe(N(2))(2) ((iPr)PDI = 2,6-(2,6-(i)Pr(2)-C(6)H(3)-N=CMe)(2)C(5)H(3)N), have been investigated by a combination of spectroscopic techniques (NMR, Mössbauer, X-ray Absorption, and X-ray Emission) and DFT calculations. Homologation of the imine methyl backbone to ethyl or isopropyl groups resulted in the preparation of the new bis(imino)pyridine iron dinitrogen complexes, ((iPr)RPDI)FeN(2) ((iPr)RPDI = 2,6-(2,6-(i)Pr(2)-C(6)H(3)-N=CR)(2)C(5)H(3)N; R = Et, (i)Pr), that are exclusively four coordinate both in the solid state and in solution. The spectroscopic and computational data establish that the ((iPr)RPDI)FeN(2) compounds are intermediate spin ferrous derivatives (S(Fe) = 1) antiferromagnetically coupled to bis(imino)pyridine triplet diradical dianions (S(PDI) = 1). While this ground state description is identical to that previously reported for ((iPr)PDI)Fe(DMAP) (DMAP = 4-N,N-dimethylaminopyridine) and other four-coordinate iron compounds with principally σ-donating ligands, the d-orbital energetics determine the degree of coupling of the metal-chelate magnetic orbitals resulting in different NMR spectroscopic behavior. For ((iPr)RPDI)Fe(DMAP) and related compounds, this coupling is strong and results in temperature independent paramagnetism where a triplet excited state mixes with the singlet ground state via spin orbit coupling. In the ((iPr)RPDI)FeN(2) family, one of the iron singly occupied molecular orbitals (SOMOs) is essentially d(z(2)) in character resulting in poor overlap with the magnetic orbitals of the chelate, leading to thermal population of the triplet state and hence temperature dependent NMR behavior. The electronic structures of ((iPr)RPDI)FeN(2) and ((iPr)PDI)Fe(DMAP) differ from ((iPr)PDI)Fe(N(2))(2), a highly covalent molecule with a redox noninnocent chelate that is best described as a resonance hybrid between iron(0) and iron(II) canonical forms as originally proposed in 2004.
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Affiliation(s)
- S Chantal E Stieber
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA
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90
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Marlier EE, Ulrich BA, McNeill K. Synthesis and Reactivity of an Isolable Cobalt(I) Complex Containing a β-Diketiminate-Based Acyclic Tetradentate Ligand. Inorg Chem 2012; 51:2079-85. [DOI: 10.1021/ic201780c] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elodie E. Marlier
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Bridget A. Ulrich
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Kristopher McNeill
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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91
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Lyaskovskyy V, de Bruin B. Redox Non-Innocent Ligands: Versatile New Tools to Control Catalytic Reactions. ACS Catal 2012. [DOI: 10.1021/cs200660v] [Citation(s) in RCA: 797] [Impact Index Per Article: 66.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Volodymyr Lyaskovskyy
- Van ‘t Hoff Institute for
Molecular Sciences
(HIMS), University of Amsterdam, P.O. Box
94720 1090 GE Amsterdam, The Netherlands
| | - Bas de Bruin
- Van ‘t Hoff Institute for
Molecular Sciences
(HIMS), University of Amsterdam, P.O. Box
94720 1090 GE Amsterdam, The Netherlands
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92
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Kaim W. The Shrinking World of Innocent Ligands: Conventionaland Non-Conventional Redox-Active Ligands. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101359] [Citation(s) in RCA: 233] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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93
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Sieh D, Schlimm M, Andernach L, Angersbach F, Nückel S, Schöffel J, Šušnjar N, Burger P. Metal–Ligand Electron Transfer in 4d and 5d Group 9 Transition Metal Complexes with Pyridine, Diimine Ligands. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101072] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Daniel Sieh
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin‐Luther‐King‐Platz 6, 20146 Hamburg, Germany, Fax: +49‐040 42838 6097
| | - Mandy Schlimm
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin‐Luther‐King‐Platz 6, 20146 Hamburg, Germany, Fax: +49‐040 42838 6097
| | - Lars Andernach
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin‐Luther‐King‐Platz 6, 20146 Hamburg, Germany, Fax: +49‐040 42838 6097
| | - Friedrich Angersbach
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin‐Luther‐King‐Platz 6, 20146 Hamburg, Germany, Fax: +49‐040 42838 6097
| | - Stefan Nückel
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin‐Luther‐King‐Platz 6, 20146 Hamburg, Germany, Fax: +49‐040 42838 6097
| | - Julia Schöffel
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin‐Luther‐King‐Platz 6, 20146 Hamburg, Germany, Fax: +49‐040 42838 6097
| | - Nevena Šušnjar
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin‐Luther‐King‐Platz 6, 20146 Hamburg, Germany, Fax: +49‐040 42838 6097
| | - Peter Burger
- Institut für Anorganische und Angewandte Chemie, Universität Hamburg, Martin‐Luther‐King‐Platz 6, 20146 Hamburg, Germany, Fax: +49‐040 42838 6097
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94
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95
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Zhou W, Chiang L, Patrick BO, Storr T, Smith KM. Cyclopentadienyl chromium diimine and pyridine-imine complexes: ligand-based radicals and metal-based redox chemistry. Dalton Trans 2012; 41:7920-30. [DOI: 10.1039/c2dt30160a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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96
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Smit TM, Tomov AK, Britovsek GJP, Gibson VC, White AJP, Williams DJ. The effect of imine-carbon substituents in bis(imino)pyridine-based ethylene polymerisation catalysts across the transition series. Catal Sci Technol 2012. [DOI: 10.1039/c2cy00448h] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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97
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MacLeod KC, Patrick BO, Smith KM. Reactivity of Cr(III) μ-Oxo Compounds: Catalyst Regeneration and Atom Transfer Processes. Inorg Chem 2011; 51:688-700. [PMID: 22175660 DOI: 10.1021/ic202233f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- K. Cory MacLeod
- Department of Chemistry, University of British Columbia Okanagan, 3333 University
Way, Kelowna, BC, Canada V1V 1V7
| | - Brian O. Patrick
- Department of Chemistry, University of British Columbia, Vancouver, British
Columbia, Canada V6T 1Z1
| | - Kevin M. Smith
- Department of Chemistry, University of British Columbia Okanagan, 3333 University
Way, Kelowna, BC, Canada V1V 1V7
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98
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Blanchard S, Derat E, Desage‐El Murr M, Fensterbank L, Malacria M, Mouriès‐Mansuy V. Non‐Innocent Ligands: New Opportunities in Iron Catalysis. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100985] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sébastien Blanchard
- Institut Parisien de Chimie Moléculaire (IPCM, UMR CNRS 7201), Université Pierre & Marie Curie (UPMC), cc 229, 4, place Jussieu, 75252 Paris Cedex 05, France, Fax: +33‐1‐44277360
| | - Etienne Derat
- Institut Parisien de Chimie Moléculaire (IPCM, UMR CNRS 7201), Université Pierre & Marie Curie (UPMC), cc 229, 4, place Jussieu, 75252 Paris Cedex 05, France, Fax: +33‐1‐44277360
| | - Marine Desage‐El Murr
- Institut Parisien de Chimie Moléculaire (IPCM, UMR CNRS 7201), Université Pierre & Marie Curie (UPMC), cc 229, 4, place Jussieu, 75252 Paris Cedex 05, France, Fax: +33‐1‐44277360
| | - Louis Fensterbank
- Institut Parisien de Chimie Moléculaire (IPCM, UMR CNRS 7201), Université Pierre & Marie Curie (UPMC), cc 229, 4, place Jussieu, 75252 Paris Cedex 05, France, Fax: +33‐1‐44277360
| | - Max Malacria
- Institut Parisien de Chimie Moléculaire (IPCM, UMR CNRS 7201), Université Pierre & Marie Curie (UPMC), cc 229, 4, place Jussieu, 75252 Paris Cedex 05, France, Fax: +33‐1‐44277360
| | - Virginie Mouriès‐Mansuy
- Institut Parisien de Chimie Moléculaire (IPCM, UMR CNRS 7201), Université Pierre & Marie Curie (UPMC), cc 229, 4, place Jussieu, 75252 Paris Cedex 05, France, Fax: +33‐1‐44277360
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99
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Caulton KG. Systematics and Future Projections Concerning Redox‐Noninnocent Amide/Imine Ligands. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100623] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kenneth G. Caulton
- Department of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, USA, Fax: +1‐812‐855‐0985
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