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Mei T, Zhang P, Song Z, Wang B, Qu J, Ye S, Yang D. Unusual Hydrogenation Reactivities of a Thiolate-Bridged Dicobalt μ-Nitride Featuring a Bent {Co III-N-Co III} Core. J Am Chem Soc 2023; 145:20578-20587. [PMID: 37674257 DOI: 10.1021/jacs.3c07254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Transition metal nitrides have received considerable attention owing to their crucial roles in nitrogen fixation and nitrogen atom transfer reactions. Compared to the early and middle transition metals, it is much more challenging to access late transition metal nitrides, especially cobalt in group 9. So far, only a handful of cobalt nitrides have been reported; consequently, their hydrogenation reactivity is largely unexplored. Herein, we present a structurally and spectroscopically well-characterized thiolate-bridged dicobalt μ-nitride [Cp*CoIII(μ-SAd)(μ-N)CoIIICp*] (2) featuring a bent {CoIII(μ-N)CoIII} core. Remarkably, complex 2 can realize not only direct hydrogenation of nitride to amide but also stepwise N-H bond formation from nitride to ammonia. Specifically, 2 can facilely activate dihydrogen (H2) at mild conditions to generate a dicobalt μ-amide [Cp*CoII(μ-SAd)(μ-NH2)CoIICp*] (4) via an unusual mechanism of two-electron oxidation of H2 as proposed by computational studies; in the presence of protons (H+) and electrons, nitride 2 can convert to dicobalt μ-imide [Cp*CoIII(μ-SAd)(μ-NH)CoIIICp*][BPh4] (3[BPh4]) and to CoIICoII μ-amide 4, and finally release ammonia. In contrast to 2, the only other structurally characterized dicobalt μ-nitride Na(THF)4{[(ketguan)CoIII(N3)]2(μ-N)} (ketguan = [(tBu2CN)C(NDipp)2]-, Dipp = 2,6-diisopropylphenyl) (e) that possesses a linear {CoIII(μ-N)CoIII} moiety cannot directly react with H2 or H+. Further in-depth electronic structure analyses shed light on how the varying geometries of the {CoIII(μ-N)CoIII} moieties in 2 and e, bent vs linear, impart their disparate reactivities.
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Affiliation(s)
- Tao Mei
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, P. R. China
| | - Peng Zhang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zihe Song
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, P. R. China
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, P. R. China
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, P. R. China
- State Key Laboratory of Bioreactor Engineering, Collaborative Innovation Centre for Biomanufacturing, Frontiers Science Center for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, P. R. China
| | - Shengfa Ye
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, P. R. China
| | - Dawei Yang
- State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Dalian University of Technology, Dalian 116024, P. R. China
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2
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Woods JJ, Novorolsky RJ, Bigham NP, Robertson GS, Wilson JJ. Dinuclear nitrido-bridged osmium complexes inhibit the mitochondrial calcium uniporter and protect cortical neurons against lethal oxygen-glucose deprivation. RSC Chem Biol 2023; 4:84-93. [PMID: 36685255 PMCID: PMC9811523 DOI: 10.1039/d2cb00189f] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 11/05/2022] [Indexed: 11/16/2022] Open
Abstract
Dysregulation of mitochondrial calcium uptake mediated by the mitochondrial calcium uniporter (MCU) is implicated in several pathophysiological conditions. Dinuclear ruthenium complexes are effective inhibitors of the MCU and have been leveraged as both tools to study mitochondrial calcium dynamics and potential therapeutic agents. In this study, we report the synthesis and characterization of Os245 ([Os2(μ-N)(NH3)8Cl2]3+) which is the osmium-containing analogue of our previously reported ruthenium-based inhibitor Ru265. This complex and its aqua-capped analogue Os245' ([Os2(μ-N)(NH3)8(OH2)2]5+) are both effective inhibitors of the MCU in permeabilized and intact cells. In comparison to the ruthenium-based inhibitor Ru265 (k obs = 4.92 × 10-3 s-1), the axial ligand exchange kinetics of Os245 are two orders of magnitude slower (k obs = 1.63 × 10-5 s-1) at 37 °C. The MCU-inhibitory properties of Os245 and Os245' are different (Os245 IC50 for MCU inhibition = 103 nM; Os245' IC50 for MCU inhibition = 2.3 nM), indicating that the axial ligands play an important role in their interactions with this channel. We further show that inhibition of the MCU by these complexes protects primary cortical neurons against lethal oxygen-glucose deprivation. When administered in vivo to mice (10 mg kg-1), Os245 and Os245' induce seizure-like behaviors in a manner similar to the ruthenium-based inhibitors. However, the onset of these seizures is delayed, a possible consequence of the slower ligand substitution kinetics for these osmium complexes. These findings support previous studies that demonstrate inhibition of the MCU is a promising therapeutic strategy for the treatment of ischemic stroke, but also highlight the need for improved drug delivery strategies to mitigate the pro-convulsant effects of this class of complexes before they can be implemented as therapeutic agents. Furthermore, the slower ligand substitution kinetics of the osmium analogues may afford new strategies for the development and modification of this class of MCU inhibitors.
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Affiliation(s)
- Joshua J. Woods
- Department of Chemistry and Chemical Biology, Cornell UniversityIthacaNY14853USA,Robert F. Smith School for Chemical and Biomolecular Engineering, Cornell UniversityIthacaNY14853USA
| | - Robyn J. Novorolsky
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Life Sciences Research InstituteHalifaxNS B3H 0A8Canada,Brain Repair Centre, Faculty of Medicine, Dalhousie University, Life Sciences Research InstituteHalifaxNS B3H 0A8Canada
| | - Nicholas P. Bigham
- Department of Chemistry and Chemical Biology, Cornell UniversityIthacaNY14853USA
| | - George S. Robertson
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Life Sciences Research InstituteHalifaxNS B3H 0A8Canada,Brain Repair Centre, Faculty of Medicine, Dalhousie University, Life Sciences Research InstituteHalifaxNS B3H 0A8Canada,Department of Psychiatry, Faculty of Medicine, Dalhousie University, Life Sciences Research InstituteHalifaxNS B3H0A8Canada
| | - Justin J. Wilson
- Department of Chemistry and Chemical Biology, Cornell UniversityIthacaNY14853USA
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3
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Abstract
Carbide complexes remain a rare class of molecules. Their paucity does not reflect exceptional instability but is rather due to the generally narrow scope of synthetic procedures for constructing carbide complexes. The preparation of carbide complexes typically revolves around generating LnM-CEx fragments, followed by cleavage of the C-E bonds of the coordinated carbon-based ligands (the alternative being direct C atom transfer). Prime examples involve deoxygenation of carbonyl ligands and deprotonation of methyl ligands, but several other p-block fragments can be cleaved off to afford carbide ligands. This Review outlines synthetic strategies toward terminal carbide complexes, bridging carbide complexes, as well as carbide-carbonyl cluster complexes. It then surveys the reactivity of carbide complexes, covering stoichiometric reactions where the carbide ligands act as C1 reagents, engage in cross-coupling reactions, and enact Fischer-Tropsch-like chemistry; in addition, we discuss carbide complexes in the context of catalysis. Finally, we examine spectroscopic features of carbide complexes, which helps to establish the presence of the carbide functionality and address its electronic structure.
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Affiliation(s)
- Anders Reinholdt
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - Jesper Bendix
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
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4
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Abstract
Terminal, electrophilic phosphinidene complexes (M=PR) are attractive platforms for PR-transfer to organic substrates. In contrast to aryl- or alkylphosphinidene complexes terminal chlorophosphinidenes (M=PCl) have only been proposed as transient intermediates but isolable example remain elusive. Here we present the transfer of PCl from chloro-substituted dibenzo-7λ3-phosphanorbornadiene to a square-planar osmium(II) PNP pincer complex to give the first isolable, terminal chlorophosphinidene complex with remarkable thermal stability. Os=P bonding was examined computationally giving rise to highly covalent {OsII=PICl} double bonding.
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Affiliation(s)
- Josh Abbenseth
- Institute für Anorganische ChemieUniversität GöttingenTammannstraße 437077Göttingen
| | - Sven Schneider
- Institute für Anorganische ChemieUniversität GöttingenTammannstraße 437077Göttingen
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5
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Ramler J, Radacki K, Abbenseth J, Lichtenberg C. Combined experimental and theoretical studies towards mutual osmium-bismuth donor/acceptor bonding. Dalton Trans 2020; 49:9024-9034. [PMID: 32567644 DOI: 10.1039/d0dt01663b] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Osmium(ii) PNP pincer complexes bearing a hemilabile pyridyl-pyrazolide (PyrPz) ligand have been synthesised, and their reactivity towards Lewis acidic bismuth compounds has been examined. Reactions with BiCl3 resulted in chlorine-atom-transfer to give an osmium(iii) species. Reactions with cationic bismuth species led to adduct formation through N → Bi bond formation via the PyrPz ligand. Theoretical analyses revealed that steric interactions hamper Os → Bi bond formation and indicate that such interactions are possible upon reducing the steric profile around the osmium atom. Analytical techniques include NMR, IR, and EPR spectroscopy, cyclic voltammetry, elemental analysis and DFT calculations.
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Affiliation(s)
- Jacqueline Ramler
- Department of Inorganic Chemistry, Julius-Maximilians-University Würzburg, Am Hubland, 97074 Würzburg, Germany.
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6
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Reinholdt A, Alemayehu AB, Gagnon KJ, Bendix J, Ghosh A. Electrophilic Activation of Osmium-Nitrido Corroles: The OsN Triple Bond as a π-Acceptor Metallaligand in a Heterobimetallic Os VIN-Pt II Complex. Inorg Chem 2020; 59:5276-5280. [PMID: 32227864 PMCID: PMC7311052 DOI: 10.1021/acs.inorgchem.0c00654] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Presented herein is a first investigation of the chemical reactivity of osmium-nitrido corroles, which are known for their unusual thermal, chemical, and photochemical stability. Elemental chlorine perchlorinates the β-positions of the triarylcorrole but leaves the OsN unit untouched. The OsN unit is also unaffected by a variety of other electrophilic and nucleophilic reagents. Upon photolysis, however, the anion of Zeise's salt associates with the nitrido ligand to generate an OsVI≡N-PtII complex. The very short OsN-Pt linkage [1.895(9)-1.917(8) Å] and the downfield 195Pt NMR resonance (-2702 ppm) suggest that the OsN corrole acts as a π-accepting ligand toward the Pt(II) center. This finding represents a rare example of the successful photochemical activation of a metal-ligand multiple bond that is too kinetically inert to exhibit any appreciable reactivity under thermal conditions.
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Affiliation(s)
- Anders Reinholdt
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - Abraham B Alemayehu
- Department of Chemistry, UiT - The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Kevin J Gagnon
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720-8229, United States
| | - Jesper Bendix
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - Abhik Ghosh
- Department of Chemistry, UiT - The Arctic University of Norway, N-9037 Tromsø, Norway
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7
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Watt FA, Krishna A, Golovanov G, Ott H, Schoch R, Wölper C, Neuba AG, Hohloch S. Monoanionic Anilidophosphine Ligand in Lanthanide Chemistry: Scope, Reactivity, and Electrochemistry. Inorg Chem 2020; 59:2719-2732. [PMID: 31961137 DOI: 10.1021/acs.inorgchem.9b03071] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We present the synthesis of a series of new lanthanide(III) complexes supported by a monoanionic bidentate anilidophosphine ligand (N-(2-(diisopropylphosphanyl)-4-methylphenyl)-2,4,6-trimethylanilide, short PN-). The work comprises the characterization of a variety of heteroleptic complexes containing either one or two PN ligands as well as a study on further functionalization possibilities. The new heteroleptic complexes cover selected examples over the whole lanthanide(III) series including lanthanum, cerium, neodymium, gadolinium, terbium, dysprosium, and lutetium. In case of the two diamagnetic metal cations lanthanum(III) and lutetium(III), we have furthermore studied the influence of the lanthanide ion (early vs. late) on the reactivity of these complexes. Thereby we found that the radius of the lanthanide ion has a major influence on the reactivity. Using sterically demanding, multidentate ligand systems, e.g., cyclopentadienide (Cp-), we found that the lanthanum complex La(PN)2Cl (1-La) reacts well to the corresponding cyclopentadienide complex, while for Lu(PN)2Cl (1-Lu) no reaction was observed under any conditions tested. On the contrary, employing monodentate ligands such as mesitolate, thiomesitolate, 2,4,6-trimethylanilide or 2,4,6-trimethylphenylphosphide, results in the clean formation of the desired complexes for both lanthanum and lutetium. All complexes have been studied by various techniques, including multi nuclear NMR spectroscopy and X-ray crystallography. 31P NMR spectroscopy was furthermore used to evaluate the presence of open coordination sites on the complexes using coordinating and noncoordinating solvents, and as a probe for estimating the Ce-P distance in the corresponding complexes. Additionally, we present cyclic voltammetry (CV) data for Ce(PN)2Cl (1-Ce), La(PN)2Cl (1-La), Ce(PN)(HMDS)2 (8-Ce) and La(PN)(HMDS)2 (8-La) (with HMDS = hexamethyldisilazide, (Me3Si)2N-) exploring the potential of the anilidophosphane ligand framework to stabilize a potential Ce(IV) ion.
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Affiliation(s)
- Fabian A Watt
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Athul Krishna
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Grigoriy Golovanov
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Holger Ott
- Training Center, Bruker AXS GmbH, Östliche Rheinbrückenstraße 49, 76187 Karlsruhe, Germany
| | - Roland Schoch
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Christoph Wölper
- Faculty of Chemistry, University of Essen-Duisburg, Universitätsstraße 5-7, 45141 Essen, Germany
| | - Adam G Neuba
- Faculty of Science, Department of Chemistry, Paderborn University, Warburger Straße 100, 33098 Paderborn, Germany
| | - Stephan Hohloch
- Faculty of Chemistry and Pharmacy, Institute of General, Inorganic and Theoretical Chemistry, Leopold-Franzens-University Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
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8
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Abbenseth J, Delony D, Neben MC, Würtele C, de Bruin B, Schneider S. Interconversion of Phosphinyl Radical and Phosphinidene Complexes by Proton Coupled Electron Transfer. Angew Chem Int Ed Engl 2019; 58:6338-6341. [PMID: 30840783 PMCID: PMC6519162 DOI: 10.1002/anie.201901470] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Indexed: 12/04/2022]
Abstract
The isolable complex [Os(PHMes*)H(PNP)] (Mes*=2,4,6-t Bu3 C6 H3 ; PNP=N{CHCHPt Bu2 }2 ) exhibits high phosphinyl radical character. This compound offers access to the phosphinidene complex [Os(PMes*)H(PNP)] by P-H proton coupled electron transfer (PCET). The P-H bond dissociation energy (BDE) was determined by isothermal titration calorimetry and supporting DFT computations. The phosphinidene product exhibits electrophilic reactivity as demonstrated by intramolecular C-H activation.
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Affiliation(s)
- Josh Abbenseth
- Georg-August-Universität GöttingenInstitut für Anorganische ChemieTammannstraße 437077GöttingenGermany
| | - Daniel Delony
- Georg-August-Universität GöttingenInstitut für Anorganische ChemieTammannstraße 437077GöttingenGermany
| | - Marc C. Neben
- Georg-August-Universität GöttingenInstitut für Anorganische ChemieTammannstraße 437077GöttingenGermany
| | - Christian Würtele
- Georg-August-Universität GöttingenInstitut für Anorganische ChemieTammannstraße 437077GöttingenGermany
| | - Bas de Bruin
- Van't Hoff Institute for Molecular Sciences (HIMS)University of Amsterdam (UvA)Science Park 9041098XHAmsterdamThe Netherlands
| | - Sven Schneider
- Georg-August-Universität GöttingenInstitut für Anorganische ChemieTammannstraße 437077GöttingenGermany
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9
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Abbenseth J, Delony D, Neben MC, Würtele C, de Bruin B, Schneider S. Interconversion of Phosphinyl Radical and Phosphinidene Complexes by Proton Coupled Electron Transfer. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901470] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Josh Abbenseth
- Georg-August-Universität GöttingenInstitut für Anorganische Chemie Tammannstraße 4 37077 Göttingen Germany
| | - Daniel Delony
- Georg-August-Universität GöttingenInstitut für Anorganische Chemie Tammannstraße 4 37077 Göttingen Germany
| | - Marc C. Neben
- Georg-August-Universität GöttingenInstitut für Anorganische Chemie Tammannstraße 4 37077 Göttingen Germany
| | - Christian Würtele
- Georg-August-Universität GöttingenInstitut für Anorganische Chemie Tammannstraße 4 37077 Göttingen Germany
| | - Bas de Bruin
- Van't Hoff Institute for Molecular Sciences (HIMS)University of Amsterdam (UvA) Science Park 904 1098 XH Amsterdam The Netherlands
| | - Sven Schneider
- Georg-August-Universität GöttingenInstitut für Anorganische Chemie Tammannstraße 4 37077 Göttingen Germany
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10
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Chantarojsiri T, Reath AH, Yang JY. Cationic Charges Leading to an Inverse Free‐Energy Relationship for N−N Bond Formation by Mn
VI
Nitrides. Angew Chem Int Ed Engl 2018; 57:14037-14042. [DOI: 10.1002/anie.201805832] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Revised: 07/15/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Teera Chantarojsiri
- Department of Chemistry University of California Irvine CA USA
- Department of Chemistry Faculty of Science Mahidol University Bangkok Thailand
| | | | - Jenny Y. Yang
- Department of Chemistry University of California Irvine CA USA
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11
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Chantarojsiri T, Reath AH, Yang JY. Cationic Charges Leading to an Inverse Free‐Energy Relationship for N−N Bond Formation by Mn
VI
Nitrides. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805832] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Teera Chantarojsiri
- Department of Chemistry University of California Irvine CA USA
- Department of Chemistry Faculty of Science Mahidol University Bangkok Thailand
| | | | - Jenny Y. Yang
- Department of Chemistry University of California Irvine CA USA
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12
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Buss JA, Cheng C, Agapie T. A Low‐Valent Molybdenum Nitride Complex: Reduction Promotes Carbonylation Chemistry. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Joshua A. Buss
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Christine Cheng
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Theodor Agapie
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
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13
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Buss JA, Cheng C, Agapie T. A Low‐Valent Molybdenum Nitride Complex: Reduction Promotes Carbonylation Chemistry. Angew Chem Int Ed Engl 2018; 57:9670-9674. [DOI: 10.1002/anie.201803728] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/31/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Joshua A. Buss
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Christine Cheng
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
| | - Theodor Agapie
- Division of Chemistry and Chemical Engineering California Institute of Technology Pasadena CA 91125 USA
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14
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Kinauer M, Diefenbach M, Bamberger H, Demeshko S, Reijerse EJ, Volkmann C, Würtele C, van Slageren J, de Bruin B, Holthausen MC, Schneider S. An iridium(iii/iv/v) redox series featuring a terminal imido complex with triplet ground state. Chem Sci 2018; 9:4325-4332. [PMID: 29780564 PMCID: PMC5944377 DOI: 10.1039/c8sc01113c] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 04/13/2018] [Indexed: 01/11/2023] Open
Abstract
An iridium(iii–v) imido series has been isolated that features an iridium complex with an unprecedented triplet ground state.
The iridium(iii/iv/v) imido redox series [Ir(NtBu){N(CHCHPtBu2)2}]0/+/2+ was synthesized and examined spectroscopically, magnetically, crystallographically and computationally. The monocationic iridium(iv) imide exhibits an electronic doublet ground state with considerable ‘imidyl’ character as a result of covalent Ir–NtBu bonding. Reduction gives the neutral imide [Ir(NtBu){N(CHCHPtBu2)2}] as the first example of an iridium complex with a triplet ground state. Its reactivity with respect to nitrene transfer to selected electrophiles (CO2) and nucleophiles (PMe3), respectively, is reported.
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Affiliation(s)
- Markus Kinauer
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstr. 4 , 37077 Göttingen , Germany .
| | - Martin Diefenbach
- Institut für Anorganische und Analytische Chemie , Goethe-Universität , Max-von-Laue-Str. 7 , 60438 Frankfurt am Main , Germany
| | - Heiko Bamberger
- Institut für Physikalische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , D-70569 Stuttgart , Germany
| | - Serhiy Demeshko
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstr. 4 , 37077 Göttingen , Germany .
| | - Edward J Reijerse
- Max-Planck-Institut für Chemische Energiekonversion , Stiftstr. 34-36 , 45470 Mülheim an der Ruhr , Germany
| | - Christian Volkmann
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstr. 4 , 37077 Göttingen , Germany .
| | - Christian Würtele
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstr. 4 , 37077 Göttingen , Germany .
| | - Joris van Slageren
- Institut für Physikalische Chemie , Universität Stuttgart , Pfaffenwaldring 55 , D-70569 Stuttgart , Germany
| | - Bas de Bruin
- van 't Hoff Institute for Molecular Sciences (HIMS) , University of Amsterdam , The Netherlands .
| | - Max C Holthausen
- Institut für Anorganische und Analytische Chemie , Goethe-Universität , Max-von-Laue-Str. 7 , 60438 Frankfurt am Main , Germany
| | - Sven Schneider
- Universität Göttingen , Institut für Anorganische Chemie , Tammannstr. 4 , 37077 Göttingen , Germany .
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15
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Reinholdt A, Hill AF, Bendix J. Synthons for carbide complex chemistry. Chem Commun (Camb) 2018; 54:5708-5711. [DOI: 10.1039/c8cc03596b] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Harnessing lability, the miniaturized ligand sphere in a [RuC–Pt] complex establishes a straightforward building-block approach to carbide complexes.
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Affiliation(s)
- Anders Reinholdt
- Department of Chemistry
- University of Copenhagen
- 2100 Copenhagen
- Denmark
- Research School of Chemistry
| | - Anthony F. Hill
- Research School of Chemistry
- Australian National University
- Canberra
- Australia
| | - Jesper Bendix
- Department of Chemistry
- University of Copenhagen
- 2100 Copenhagen
- Denmark
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