351
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Söncksen L, Gradert C, Krahmer J, Näther C, Tuczek F. Bonding and Activation of N2 in Mo(0) Complexes Supported by Hybrid Tripod Ligands with Mixed Dialkylphosphine/Diarylphosphine Donor Groups: Interplay of Steric and Electronic Factors. Inorg Chem 2013; 52:6576-89. [DOI: 10.1021/ic400582v] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ludger Söncksen
- Institut für Anorganische Chemie, Christian Albrechts Universität Kiel, Max-Eyth-Strasse 2, D-24118 Kiel, Germany
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352
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Tran BL, Krzystek J, Ozarowski A, Chen CH, Pink M, Karty JA, Telser J, Meyer K, Mindiola DJ. Formation and Reactivity of the Terminal Vanadium Nitride Functionality. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300178] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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353
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Akagi F, Suzuki S, Ishida Y, Hatanaka T, Matsuo T, Kawaguchi H. Reactions of a Niobium Nitride Complex Prepared from Dinitrogen: Synthesis of Imide and Ureate Complexes and Ammonia Formation. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300172] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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354
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Chandrasekaran P, Chiang KP, Nordlund D, Bergmann U, Holland PL, DeBeer S. Sensitivity of X-ray core spectroscopy to changes in metal ligation: a systematic study of low-coordinate, high-spin ferrous complexes. Inorg Chem 2013; 52:6286-98. [PMID: 23662855 DOI: 10.1021/ic3021723] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In order to assess the sensitivity and complementarity of X-ray absorption and emission spectroscopies for determining changes in the metal ligation sphere, a systematic experimental and theoretical study of iron model complexes has been carried out. A series of high-spin ferrous complexes, in which the ligation sphere has been varied from a three-coordinate complex, [L(tBu)Fe(SPh)] (1) (where L(tBu) = bulky β-diketiminate ligand; SPh = phenyl thiolate) to four-coordinate complexes [L(tBu)Fe(SPh)(X)] (where X = CN(t)Bu (2); 1-methylimidazole (3); or N,N-dimethylformamide (DMF) (4)), has been investigated using a combination of Fe K-edge X-ray absorption (XAS) and Kβ X-ray emission (XES) spectroscopies. The Fe K XAS pre-edge and edge of all four complexes are consistent with a high-spin ferrous assignment, with the largest differences in the pre-edge intensities attributed to changes in covalency of the fourth coordination site. The X-ray emission spectra show pronounced changes in the valence to core region (V2C) as the identity of the coordinated ligand is varied. The experimental results have been correlated to density functional theory (DFT) calculations, to understand key molecular orbital contributions to the observed absorption and emission features. The calculations also have been extended to a series of hypothetical high-spin iron complexes to understand the sensitivity of XAS and XES techniques to different ligand protonation states ([L(tBu)Fe(II)(SPh)(NHn)](3-n) (n = 3, 2, 1, 0)), metal oxidation states [L(tBu)Fe(SPh)(N)](n-) (n = 3, 2, 1), and changes in the ligand identity [L(tBu)Fe(IV)(SPh)(X)](n-) (X = C(4-), N(3-), O(2-); n = 2, 1, 0). This study demonstrates that XAS pre-edge data have greater sensitivity to changes in oxidation state, while valence to core (V2C) XES data provide a more sensitive probe of ligand identity and protonation state. The combination of multiple X-ray spectroscopic methods with DFT results thus has the potential to provide for detailed characterization of complex inorganic systems in both chemical and biological catalysis.
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Affiliation(s)
- P Chandrasekaran
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA
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355
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Umehara K, Kuwata S, Ikariya T. N–N Bond Cleavage of Hydrazines with a Multiproton-Responsive Pincer-Type Iron Complex. J Am Chem Soc 2013; 135:6754-7. [DOI: 10.1021/ja3122944] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kazuki Umehara
- Department
of Applied Chemistry, Graduate School of
Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Shigeki Kuwata
- Department
of Applied Chemistry, Graduate School of
Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Takao Ikariya
- Department
of Applied Chemistry, Graduate School of
Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
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356
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Köthe C, Metzinger R, Limberg C. Reduction and Hydrogenation of a Diazene by a (β‐Diketiminato)nickel Hydrazide. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300064] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Claudia Köthe
- Humboldt‐Universität zu Berlin, Institut für Chemie Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐6966, http://www.chemie.hu‐berlin.de/aglimberg/
| | - Ramona Metzinger
- Humboldt‐Universität zu Berlin, Institut für Chemie Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐6966, http://www.chemie.hu‐berlin.de/aglimberg/
| | - Christian Limberg
- Humboldt‐Universität zu Berlin, Institut für Chemie Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐6966, http://www.chemie.hu‐berlin.de/aglimberg/
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357
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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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358
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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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359
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Suess DLM, Peters JC. H-H and Si-H bond addition to Fe≡NNR2 intermediates derived from N2. J Am Chem Soc 2013; 135:4938-41. [PMID: 23472709 DOI: 10.1021/ja400836u] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and characterization of Fe-diphosphineborane complexes are described in the context of N2 functionalization chemistry. Iron aminoimides can be generated at room temperature under 1 atm N2 and are shown to react with E-H bonds from PhSiH3 and H2. The resulting products derive from delivery of the E fragment to Nα and the H atom to B. The flexibility and lability of the Fe-BPh interactions in these complexes engender this reactivity.
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Affiliation(s)
- Daniel L M Suess
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
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360
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Heiden ZM, Chen S, Mock MT, Dougherty WG, Kassel WS, Rousseau R, Bullock RM. Protonation of Ferrous Dinitrogen Complexes Containing a Diphosphine Ligand with a Pendent Amine. Inorg Chem 2013; 52:4026-39. [DOI: 10.1021/ic4000704] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zachariah M. Heiden
- Center for Molecular Electrocatalysis,
Physical Sciences Division, Pacific Northwest National Laboratory,
Richland, Washington 99352, United States
| | - Shentan Chen
- Center for Molecular Electrocatalysis,
Physical Sciences Division, Pacific Northwest National Laboratory,
Richland, Washington 99352, United States
| | - Michael T. Mock
- Center for Molecular Electrocatalysis,
Physical Sciences Division, Pacific Northwest National Laboratory,
Richland, Washington 99352, United States
| | - William G. Dougherty
- Department of Chemistry, Villanova
University, Villanova, Pennsylvania 19085, United States
| | - W. Scott Kassel
- Department of Chemistry, Villanova
University, Villanova, Pennsylvania 19085, United States
| | - Roger Rousseau
- Center for Molecular Electrocatalysis,
Physical Sciences Division, Pacific Northwest National Laboratory,
Richland, Washington 99352, United States
| | - R. Morris Bullock
- Center for Molecular Electrocatalysis,
Physical Sciences Division, Pacific Northwest National Laboratory,
Richland, Washington 99352, United States
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361
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Ammonia formation by a thiolate-bridged diiron amide complex as a nitrogenase mimic. Nat Chem 2013; 5:320-6. [DOI: 10.1038/nchem.1594] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Accepted: 02/04/2013] [Indexed: 01/30/2023]
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362
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Dreher A, Meyer S, Näther C, Westphal A, Broda H, Sarkar B, Kaim W, Kurz P, Tuczek F. Reduction and protonation of Mo(IV) imido complexes with depe coligands: generation and reactivity of a S = 1/2 Mo(III) alkylnitrene intermediate. Inorg Chem 2013; 52:2335-52. [PMID: 23398558 DOI: 10.1021/ic301828e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Reduction and protonation of Mo(IV) imido complexes with diphosphine coligands constitutes the second part of the Chatt cycle for biomimetic reduction of N2 to ammonia. In order to obtain insights into the corresponding elementary reactions we synthesized the Mo(IV) ethylimido complex [Mo(CH3CN)(NEt)(depe)2](OTf)2 (2-MeCN) from the Mo(IV)-NNH2 precursor [Mo(NNH2)(OTf)(depe)2](OTf) (1). As shown by UV-vis and NMR spectroscopy, exchange of the acetonitrile ligand with one of the counterions in THF results in formation of the so far unknown complex [Mo(OTf)(NEt)(depe)2](OTf) (2-OTf). 2-MeCN and 2-OTf are studied by spectroscopy and X-ray crystallography in conjunction with DFT calculations. Furthermore, both complexes are investigated by cyclic voltammetry and spectroelectrochemistry. The complex 2-OTf undergoes a two-electron reduction in THF associated with loss of the trans ligand triflate. In contrast, 2-MeCN in acetonitrile is reduced to an unprecedented Mo(III) alkylnitrene complex [Mo(NEt)(CH3CN)(depe)2]OTf (5) which abstracts a proton from the parent Mo(IV) compound 2-MeCN, forming the Mo(III) ethylamido complex 5H and a Mo(II) azavinylidene complex 6. Compound 5 is also protonated to the Mo(III) ethylamido complex 5H in the presence of externally added acid and further reduced to the Mo(II) ethylamido complex 7. The results of this study provide further support to a central reaction paradigm of the Schrock and Chatt cycles: double reductions (and double protonations) lead to high-energy intermediates, and therefore, every single reduction has to be followed by a single protonation (and vice versa). Only in this way the biomimetic conversion of dinitrogen to ammonia proceeds on a minimum-energy pathway.
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Affiliation(s)
- Ameli Dreher
- Institut für Anorganische Chemie, Christian-Albrechts-Universität Kiel, Max-Eyth-Strasse 2, 24118 Kiel, Germany
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363
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Bartholomew ER, Volpe EC, Wolczanski PT, Lobkovsky EB, Cundari TR. Selective Extraction of N2 from Air by Diarylimine Iron Complexes. J Am Chem Soc 2013; 135:3511-27. [DOI: 10.1021/ja311021u] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Erika R. Bartholomew
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Emily C. Volpe
- 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
| | - Emil B. Lobkovsky
- 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
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364
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Park YJ, Cook SA, Sickerman NS, Sano Y, Ziller JW, Borovik AS. Heterobimetallic Complexes with M III-( μ-OH)-M II Cores (M III = Fe, Mn, Ga; M II = Ca, Sr, and Ba): Structural, Kinetic, and Redox Properties. Chem Sci 2013; 4:717-726. [PMID: 24058726 PMCID: PMC3777273 DOI: 10.1039/c2sc21400h] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The effects of redox-inactive metal ions on dioxygen activation were explored using a new FeII complex containing a tripodal ligand with 3 sulfonamido groups. This iron complex exhibited a faster initial rate for the reduction of O2 than its MnII analog. Increases in initial rates were also observed in the presence of group 2 metal ions for both the FeII and MnII complexes, which followed the trend NMe4+ < BaII < CaII = SrII. These studies led to the isolation of heterobimetallic complexes containing FeIII-(μ-OH)-MII cores (MII = Ca, Sr, and Ba) and one with a [SrII(OH)MnIII]+ motif. The analogous [CaII(OH)GaIII]+ complex was also prepared and its solid state molecular structure is nearly identical to that of the [CaII(OH)FeIII]+ system. Nuclear magnetic resonance studies indicated that the diamagnetic [CaII(OH)GaIII]+ complex retained its structure in solution. Electrochemical measurements on the heterobimetallic systems revealed similar one-electron reduction potentials for the [CaII(OH)FeIII]+ and [SrII(OH)FeIII]+ complexes, which were more positive than the potential observed for [BaII(OH)FeIII]+. Similar results were obtained for the heterobimetallic MnII complexes. These findings suggest that Lewis acidity is not the only factor to consider when evaluating the effects of group 2 ions on redox processes, including those within the oxygen-evolving complex of Photosystem II.
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Affiliation(s)
- Young Jun Park
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
| | - Sarah A. Cook
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
| | - Nathaniel S. Sickerman
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
| | - Yohei Sano
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
| | - Joseph W. Ziller
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
| | - A. S. Borovik
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, CA, 92697-2025, USA. Fax: 949-824-8571; Tel: 949-824-1510
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365
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Guillet GL, Sloane FT, Ermert DM, Calkins MW, Peprah MK, Knowles ES, Čižmár E, Abboud KA, Meisel MW, Murray LJ. Preorganized assembly of three iron(ii) or manganese(ii) β-diketiminate complexes using a cyclophane ligand. Chem Commun (Camb) 2013; 49:6635-7. [DOI: 10.1039/c3cc43395a] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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366
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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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367
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Wang X, Mo Z, Xiao J, Deng L. Monomeric Bis(anilido)iron(II) Complexes with N-Heterocyclic Carbene Ligation: Synthesis, Characterization, and Redox Reactivity toward Aryl Halides. Inorg Chem 2012; 52:59-65. [DOI: 10.1021/ic301894e] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Xiaojie Wang
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, P.
R. China, 200032
| | - Zhenbo Mo
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, P.
R. China, 200032
| | - Jie Xiao
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, P.
R. China, 200032
| | - Liang Deng
- State Key Laboratory of Organometallic
Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, P.
R. China, 200032
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368
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Yuki M, Tanaka H, Sasaki K, Miyake Y, Yoshizawa K, Nishibayashi Y. Iron-catalysed transformation of molecular dinitrogen into silylamine under ambient conditions. Nat Commun 2012; 3:1254. [DOI: 10.1038/ncomms2264] [Citation(s) in RCA: 114] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2012] [Accepted: 11/06/2012] [Indexed: 02/02/2023] Open
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369
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Chen J. Chlorido{N-[(diethyl-amino)-dimethyl-sil-yl]anilido-κN}(N,N,N',N'-tetra-methyl-ethane-1,2-diamine-κ(2) N,N')iron(II). Acta Crystallogr Sect E Struct Rep Online 2012; 68:m1444. [PMID: 23468676 PMCID: PMC3588711 DOI: 10.1107/s1600536812044741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 10/29/2012] [Indexed: 11/22/2022]
Abstract
In the title iron(II) complex, [Fe(C12H21N2Si)Cl(C6H16N2)], the FeII cation is coordinated by two N atoms from the tetramethylethane-1,2-diamine ligand [Fe—N = 2.191 (5) and 2.215 (4) Å], one N atom from the N-[(diethylamino)dimethylsilyl]anilide ligand [Fe—N = 1.943 (4) Å] and a chloride ligand [Fe—Cl = 2.2798 (16) Å] in a distorted tetrahedral geometry. The N—Si—N angle is 113.9 (3)°. The crystal packing exhibits no short intermolecular contacts.
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Affiliation(s)
- Juan Chen
- Department of Chemistry, Taiyuan Teachers College, Taiyuan 030031, People's Republic of China
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370
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Walter MD, White PS. Reactivity Studies on [Cp′FeI]2: Monomeric Amido, Phenoxo, and Alkyl Complexes. Inorg Chem 2012; 51:11860-72. [DOI: 10.1021/ic301770f] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Marc D. Walter
- Institut für Anorganische
und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Peter S. White
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel
Hill, North Carolina 27599-3290, United States
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371
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Takemoto S, Yamazaki Y, Yamano T, Mashima D, Matsuzaka H. Synthesis and N–H Reductive Elimination Study of Dinuclear Ruthenium Imido Dihydride Complexes. J Am Chem Soc 2012; 134:17027-35. [DOI: 10.1021/ja3005682] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shin Takemoto
- Department of Chemistry,
Graduate School of Science, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku,
Sakai, Osaka 599-8531, Japan
| | - Yusuke Yamazaki
- Department of Chemistry,
Graduate School of Science, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku,
Sakai, Osaka 599-8531, Japan
| | - Takahiro Yamano
- Department of Chemistry,
Graduate School of Science, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku,
Sakai, Osaka 599-8531, Japan
| | - Daichi Mashima
- Department of Chemistry,
Graduate School of Science, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku,
Sakai, Osaka 599-8531, Japan
| | - Hiroyuki Matsuzaka
- Department of Chemistry,
Graduate School of Science, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku,
Sakai, Osaka 599-8531, Japan
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372
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Rozenel SS, Arnold J. Bimetallic Ruthenium PNP Pincer Complex As a Platform to Model Proposed Intermediates in Dinitrogen Reduction to Ammonia. Inorg Chem 2012; 51:9730-9. [DOI: 10.1021/ic3010322] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Sergio S. Rozenel
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
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373
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Cowley RE, Holland PL. Ligand effects on hydrogen atom transfer from hydrocarbons to three-coordinate iron imides. Inorg Chem 2012; 51:8352-61. [PMID: 22800175 DOI: 10.1021/ic300870y] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new β-diketiminate ligand with 2,4,6-tri(phenyl)phenyl N-substituents provides protective bulk around the metal without exposing any weak C-H bonds. This ligand improves the stability of reactive iron(III) imido complexes with Fe═NAd and Fe═NMes functional groups (Ad = 1-adamantyl; Mes = mesityl). The new ligand gives iron(III) imido complexes that are significantly more reactive toward 1,4-cyclohexadiene than the previously reported 2,6-diisopropylphenyl diketiminate variants. Analysis of X-ray crystal structures implicates Fe═N-C bending, a longer Fe═N bond, and greater access to the metal as potential reasons for the increase in C-H bond activation rates.
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Affiliation(s)
- Ryan E Cowley
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
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374
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Hölscher M, Leitner W. Heterolytische Outer-Sphere-Spaltung von H2 zur Reduktion von N2 in der Koordinationssphäre von Übergangsmetallen - eine DFT-Studie. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201202025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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375
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Hölscher M, Leitner W. Heterolytic outer-sphere cleavage of H2 for the reduction of N2 in the coordination sphere of transition metals--a DFT study. Angew Chem Int Ed Engl 2012; 51:8225-9. [PMID: 22782940 DOI: 10.1002/anie.201202025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Revised: 05/31/2012] [Indexed: 11/08/2022]
Affiliation(s)
- Markus Hölscher
- Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany.
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376
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Fohlmeister L, Liu S, Schulten C, Moubaraki B, Stasch A, Cashion JD, Murray KS, Gagliardi L, Jones C. Low-Coordinate Iron(I) and Manganese(I) Dimers: Kinetic Stabilization of an Exceptionally Short FeFe Multiple Bond. Angew Chem Int Ed Engl 2012; 51:8294-8. [DOI: 10.1002/anie.201203711] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 06/14/2012] [Indexed: 11/12/2022]
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377
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Fohlmeister L, Liu S, Schulten C, Moubaraki B, Stasch A, Cashion JD, Murray KS, Gagliardi L, Jones C. Low-Coordinate Iron(I) and Manganese(I) Dimers: Kinetic Stabilization of an Exceptionally Short FeFe Multiple Bond. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203711] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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378
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Figg TM, Holland PL, Cundari TR. Cooperativity between low-valent iron and potassium promoters in dinitrogen fixation. Inorg Chem 2012; 51:7546-50. [PMID: 22734966 DOI: 10.1021/ic300150u] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A density functional theory (DFT) study was performed to understand the role of cooperativity between iron-β-diketiminate fragments and potassium promoters in N(2) activation. Sequential addition of iron fragments to N(2) reveals that a minimum of three Fe centers interact with N(2) in order to break the triple bond. The potassium promoter stabilizes the N(3-) ligand formed upon N(2) scission, thus making the activated iron nitride complex more energetically accessible. Reduction of the complex and stabilization of N(3-) by K(+) have similar impact on the energetics in the gas phase. However, upon inclusion of continuum THF solvent effects, coordination of K(+) has a reduced influence upon the overall energetics of dinitrogen fixation; thus, reduction of the trimetallic Fe complex becomes more impactful than coordination of K(+) vis-à-vis N(2) activation upon the inclusion of solvent effects.
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Affiliation(s)
- Travis M Figg
- Department of Chemistry and Center for Advanced Scientific Computing and Modeling, University of North Texas, Denton, Texas 76203-5017, USA
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379
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Solans-Monfort X, Chow C, Gouré E, Kaya Y, Basset JM, Taoufik M, Quadrelli EA, Eisenstein O. Successive Heterolytic Cleavages of H2 Achieve N2 Splitting on Silica-Supported Tantalum Hydrides: A DFT Proposed Mechanism. Inorg Chem 2012; 51:7237-49. [DOI: 10.1021/ic300498b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Catherine Chow
- Université de Lyon, Institut
de Chimie de Lyon, C2P2 (CNRS, CPE Lyon, Université Lyon 1)
Ecole Supérieure de Chimie Physique Electronique de Lyon, 43
Boulevard du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Eric Gouré
- Université de Lyon, Institut
de Chimie de Lyon, C2P2 (CNRS, CPE Lyon, Université Lyon 1)
Ecole Supérieure de Chimie Physique Electronique de Lyon, 43
Boulevard du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Yasemin Kaya
- Université de Lyon, Institut
de Chimie de Lyon, C2P2 (CNRS, CPE Lyon, Université Lyon 1)
Ecole Supérieure de Chimie Physique Electronique de Lyon, 43
Boulevard du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Jean-Marie Basset
- Université de Lyon, Institut
de Chimie de Lyon, C2P2 (CNRS, CPE Lyon, Université Lyon 1)
Ecole Supérieure de Chimie Physique Electronique de Lyon, 43
Boulevard du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Mostafa Taoufik
- Université de Lyon, Institut
de Chimie de Lyon, C2P2 (CNRS, CPE Lyon, Université Lyon 1)
Ecole Supérieure de Chimie Physique Electronique de Lyon, 43
Boulevard du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Elsje Alessandra Quadrelli
- Université de Lyon, Institut
de Chimie de Lyon, C2P2 (CNRS, CPE Lyon, Université Lyon 1)
Ecole Supérieure de Chimie Physique Electronique de Lyon, 43
Boulevard du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Odile Eisenstein
- Institut Charles Gerhardt, UMR
5253 CNRS, Université Montpellier 2, cc 1501, Place E. Bataillon,
F-34095 Montpellier, France
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380
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Liew SK, Al-Rafia SMI, Goettel JT, Lummis PA, McDonald SM, Miedema LJ, Ferguson MJ, McDonald R, Rivard E. Expanding the Steric Coverage Offered by Bis(amidosilyl) Chelates: Isolation of Low-Coordinate N-Heterocyclic Germylene Complexes. Inorg Chem 2012; 51:5471-80. [DOI: 10.1021/ic300495k] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sean K. Liew
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta,
Canada, T6G 2G2
| | - S. M. Ibrahim Al-Rafia
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta,
Canada, T6G 2G2
| | - James T. Goettel
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta,
Canada, T6G 2G2
| | - Paul A. Lummis
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta,
Canada, T6G 2G2
| | - Sean M. McDonald
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta,
Canada, T6G 2G2
| | - Leah J. Miedema
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta,
Canada, T6G 2G2
| | - Michael J. Ferguson
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta,
Canada, T6G 2G2
| | - Robert McDonald
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta,
Canada, T6G 2G2
| | - Eric Rivard
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta,
Canada, T6G 2G2
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381
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Milsmann C, Turner ZR, Semproni SP, Chirik PJ. Azo NN Bond Cleavage with a Redox-Active Vanadium Compound Involving Metal-Ligand Cooperativity. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201085] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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382
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Milsmann C, Turner ZR, Semproni SP, Chirik PJ. Azo NN Bond Cleavage with a Redox-Active Vanadium Compound Involving Metal-Ligand Cooperativity. Angew Chem Int Ed Engl 2012; 51:5386-90. [DOI: 10.1002/anie.201201085] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Revised: 03/12/2012] [Indexed: 11/07/2022]
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383
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Semproni SP, Milsmann C, Chirik PJ. Structure and Reactivity of a Hafnocene μ-Nitrido Prepared From Dinitrogen Cleavage. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201361] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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384
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Semproni SP, Milsmann C, Chirik PJ. Structure and Reactivity of a Hafnocene μ-Nitrido Prepared From Dinitrogen Cleavage. Angew Chem Int Ed Engl 2012; 51:5213-6. [DOI: 10.1002/anie.201201361] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Indexed: 11/10/2022]
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385
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Yuki M, Miyake Y, Nishibayashi Y. Synthesis of Sulfur- and Nitrogen-Bridged Diiron Complexes and Catalytic Behavior toward Hydrazines. Organometallics 2012. [DOI: 10.1021/om300134t] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Masahiro Yuki
- Institute
of Engineering Innovation, School
of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656,
Japan
| | - Yoshihiro Miyake
- Institute
of Engineering Innovation, School
of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656,
Japan
| | - Yoshiaki Nishibayashi
- Institute
of Engineering Innovation, School
of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656,
Japan
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386
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Scheibel MG, Schneider S. New Insights into the Biological and Synthetic Fixation of Nitrogen. Angew Chem Int Ed Engl 2012; 51:4529-31. [DOI: 10.1002/anie.201200175] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Indexed: 11/09/2022]
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387
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Scheibel MG, Schneider S. Neues von der biologischen und synthetischen Stickstofffixierung. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201200175] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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388
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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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389
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Abstract
Selective functionalization of unactivated C-H bonds and ammonia production are extremely important industrial processes. A range of metalloenyzmes achieve these challenging tasks in biology by activating dioxygen and dinitrogen using cheap and abundant transition metals, such as iron, copper and manganese. High-valent iron-oxo and -nitrido complexes act as active intermediates in many of these processes. The generation of well-described model compounds can provide vital insights into the mechanism of such enzymatic reactions. Advances in the chemistry of model high-valent iron-oxo and -nitrido systems can be related to our understanding of the biological systems.
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390
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391
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Arashiba K, Sasaki K, Kuriyama S, Miyake Y, Nakanishi H, Nishibayashi Y. Synthesis and Protonation of Molybdenum– and Tungsten–Dinitrogen Complexes Bearing PNP-Type Pincer Ligands. Organometallics 2012. [DOI: 10.1021/om300011z] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuya Arashiba
- Institute of Engineering Innovation,
School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kouitsu Sasaki
- Institute of Engineering Innovation,
School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Shogo Kuriyama
- Institute of Engineering Innovation,
School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yoshihiro Miyake
- Institute of Engineering Innovation,
School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Haruyuki Nakanishi
- Fuel Cell System Development
Center, Toyota Motor Corporation, Mishuku,
Susono, Shizuoka 410-1193, Japan
| | - Yoshiaki Nishibayashi
- Institute of Engineering Innovation,
School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
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392
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393
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Hebden TJ, Schrock RR, Takase MK, Müller P. Cleavage of dinitrogen to yield a (t-BuPOCOP)molybdenum(IV) nitride. Chem Commun (Camb) 2012; 48:1851-3. [PMID: 22222763 DOI: 10.1039/c2cc17634c] [Citation(s) in RCA: 123] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(t-BuPOCOP)MoI(2) (1; t-BuPOCOP = C(6)H(3)-1,3-[OP(t-Bu)(2)](2)) has been synthesized from MoI(3)(THF)(3). Upon reduction of 1 with Na/Hg under dinitrogen molecular nitrogen is cleaved to form [(t-BuPOCOP)Mo(I)(N)](-). The origin of the N atom was confirmed using (15)N(2). Protonation of [(t-BuPOCOP)Mo(I)(N)](-) results in the formation of a neutral species in which it is proposed that the proton has added across the Mo-P bond.
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Affiliation(s)
- Travis J Hebden
- Department of Chemistry 6-331, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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394
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395
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Smith JM, Subedi D. The structure and reactivity of iron nitride complexes. Dalton Trans 2012; 41:1423-9. [DOI: 10.1039/c1dt11674f] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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396
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Hinrichsen S, Broda H, Gradert C, Söncksen L, Tuczek F. Recent developments in synthetic nitrogen fixation. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2ic90033e] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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397
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Nishibayashi Y. Molybdenum-catalyzed reduction of molecular dinitrogen under mild reaction conditions. Dalton Trans 2012; 41:7447-53. [DOI: 10.1039/c2dt30105a] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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