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Werr M, Kaifer E, Enders M, Asyuda A, Zharnikov M, Himmel H. Synthese eines Kupfer(I)‐Komplexes mit zwei ungepaarten Elektronen durch Oxidation eines Kupfer(II)‐Komplexes mit zwei redoxaktiven Liganden. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Marco Werr
- Anorganisch-Chemisches Institut Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
| | - Markus Enders
- Anorganisch-Chemisches Institut Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
| | - Andika Asyuda
- Angewandte Physikalische Chemie Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 253 69120 Heidelberg Deutschland
| | - Michael Zharnikov
- Angewandte Physikalische Chemie Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 253 69120 Heidelberg Deutschland
| | - Hans‐Jörg Himmel
- Anorganisch-Chemisches Institut Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
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2
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Werr M, Kaifer E, Enders M, Asyuda A, Zharnikov M, Himmel H. A Copper(I) Complex with Two Unpaired Electrons, Synthesised by Oxidation of a Copper(II) Complex with Two Redox-Active Ligands. Angew Chem Int Ed Engl 2021; 60:23451-23462. [PMID: 34423532 PMCID: PMC8596453 DOI: 10.1002/anie.202109367] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 07/30/2021] [Indexed: 01/10/2023]
Abstract
Two homoleptic copper(II) complexes [Cu(L1)2 ] and [Cu(L2)2 ] with anionic redox-active ligands were synthesised, one with urea azine (L1) and the other with thio-urea azine (L2) ligands. One-electron oxidation of the complexes initiates an unprecedented redox-induced electron transfer process, leading to monocationic copper(I) complexes [Cu(L1)2 ]+ and [Cu(L2)2 ]+ with two oxidised ligands. While [Cu(L1)2 ]+ is best described as a CuI complex with two neutral radical ligands that couple antiferromagnetically, [Cu(L2)2 ]+ is a CuI complex with two clearly different ligand units in the solid state and with a magnetic susceptibility close to a diamagnetic compound. Further one-electron oxidation of the complex with L1 ligands results in a dication [Cu(L1)2 ]2+ , best described as a CuI complex with a twofold oxidised, monocationic ligand and a neutral radical ligand. The stability in at least three redox states, the accumulation of spin density at the ligands and the facile ligand-metal electron transfer make these complexes highly attractive for a variety of applications; here the catalytic aerobic oxidation of alcohols to aldehydes is tested.
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Affiliation(s)
- Marco Werr
- Anorganisch-Chemisches InstitutRuprecht-Karls Universität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches InstitutRuprecht-Karls Universität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Markus Enders
- Anorganisch-Chemisches InstitutRuprecht-Karls Universität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Andika Asyuda
- Angewandte Physikalische ChemieRuprecht-Karls Universität HeidelbergIm Neuenheimer Feld 25369120HeidelbergGermany
| | - Michael Zharnikov
- Angewandte Physikalische ChemieRuprecht-Karls Universität HeidelbergIm Neuenheimer Feld 25369120HeidelbergGermany
| | - Hans‐Jörg Himmel
- Anorganisch-Chemisches InstitutRuprecht-Karls Universität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
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Sobottka S, Nößler M, Ostericher AL, Hermann G, Subat NZ, Beerhues J, Behr‐van der Meer M, Suntrup L, Albold U, Hohloch S, Tremblay JC, Sarkar B. Tuning Pt II -Based Donor-Acceptor Systems through Ligand Design: Effects on Frontier Orbitals, Redox Potentials, UV/Vis/NIR Absorptions, Electrochromism, and Photocatalysis. Chemistry 2020; 26:1314-1327. [PMID: 31778594 PMCID: PMC7027812 DOI: 10.1002/chem.201903700] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 11/07/2019] [Indexed: 12/16/2022]
Abstract
Asymmetric platinum donor-acceptor complexes [(pimp)Pt(Q2- )] are presented in this work, in which pimp=[(2,4,6-trimethylphenylimino)methyl]pyridine and Q2- =catecholate-type donor ligands. The properties of the complexes are evaluated as a function of the donor ligands, and correlations are drawn among electrochemical, optical, and theoretical data. Special focus has been put on the spectroelectrochemical investigation of the complexes featuring sulfonyl-substituted phenylendiamide ligands, which show redox-induced linkage isomerism upon oxidation. Time-dependent density functional theory (TD-DFT) as well as electron flux density analysis have been employed to rationalize the optical spectra of the complexes and their reactivity. Compound 1 ([(pimp)Pt(Q2- )] with Q2- =3,5-di-tert-butylcatecholate) was shown to be an efficient photosensitizer for molecular oxygen and was subsequently employed in photochemical cross-dehydrogenative coupling (CDC) reactions. The results thus display new avenues for donor-acceptor systems, including their role as photocatalysts for organic transformations, and the possibility to introduce redox-induced linkage isomerism in these compounds through the use of sulfonamide substituents on the donor ligands.
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Affiliation(s)
- Sebastian Sobottka
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
| | - Maite Nößler
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
| | - Andrew L. Ostericher
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
- Current address: Department of Chemistry and BiochemistryUniversity of California San Diego9500 Gilman DriveLa JollaCA92093USA
| | - Gunter Hermann
- QoD Technologies GmbHc/o Freie Universität BerlinAltensteinstrasse 4014195BerlinGermany
| | - Noah Z. Subat
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
| | - Julia Beerhues
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
| | - Margarethe Behr‐van der Meer
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
| | - Lisa Suntrup
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
- Current address: Department of ChemistryUniversity of Massachusetts Boston100 Morrissey BoulevardBostonMA02125USA
| | - Uta Albold
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
| | - Stephan Hohloch
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
- Current address: University of PaderbornWarburger Strasse 10033098PaderbornGermany
| | - Jean Christophe Tremblay
- Laboratoire de physique et chimie théoriquesCNRS/Université de Lorraine—UMR 70191 bd Arago57070MetzFrance
| | - Biprajit Sarkar
- Institut für Chemie und BiochemieAnorganische ChemieFreie Universität BerlinFabeckstrasse 34–3614195BerlinGermany
- Institut für Anorganische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
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4
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van der Vlugt JI. Radical-Type Reactivity and Catalysis by Single-Electron Transfer to or from Redox-Active Ligands. Chemistry 2019; 25:2651-2662. [PMID: 30084211 PMCID: PMC6471147 DOI: 10.1002/chem.201802606] [Citation(s) in RCA: 127] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Indexed: 12/12/2022]
Abstract
Controlled ligand-based redox-activity and chemical non-innocence are rapidly gaining importance for selective (catalytic) processes. This Concept aims to provide an overview of the progress regarding ligand-to-substrate single-electron transfer as a relatively new mode of operation to exploit ligand-centered reactivity and catalysis based thereon.
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Affiliation(s)
- Jarl Ivar van der Vlugt
- Bio-Inspired Homogeneous and Supramolecular Catalysis Groupvan ‘t Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamNetherlands
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Smirnov AS, Martins LMDRS, Nikolaev DN, Manzhos RA, Gurzhiy VV, Krivenko AG, Nikolaenko KO, Belyakov AV, Garabadzhiu AV, Davidovich PB. Structure and catalytic properties of novel copper isatin Schiff base complexes. NEW J CHEM 2019. [DOI: 10.1039/c8nj02718h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Isatin Schiff bases in combination with copper ions act as non-innocent ligands amplifying the alcohol oxidation process.
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Affiliation(s)
- Andrey S. Smirnov
- Saint-Petersburg Technological Institute
- St. Petersburg
- Russia
- Saint-Petersburg State University
- St. Petersburg
| | | | | | - Roman A. Manzhos
- Institute of Problems of Chemical Physics
- Russian Academy of Sciences
- Chernogolovka
- Russia
| | | | - Alexander G. Krivenko
- Institute of Problems of Chemical Physics
- Russian Academy of Sciences
- Chernogolovka
- Russia
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Ren Y, Cheaib K, Jacquet J, Vezin H, Fensterbank L, Orio M, Blanchard S, Desage-El Murr M. Copper-Catalyzed Aziridination with Redox-Active Ligands: Molecular Spin Catalysis. Chemistry 2018; 24:5086-5090. [PMID: 29356131 DOI: 10.1002/chem.201705649] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Indexed: 12/22/2022]
Abstract
Small-molecule catalysts as mimics of biological systems illustrate the chemists' attempts at emulating the tantalizing abilities displayed by nature's metalloenzymes. Among these innate behaviors, spin multistate reactivity is used by biological systems as it offers thermodynamic leverage towards challenging chemical reactivity but this concept is difficult to translate into the realm of synthetic organometallic catalysis. Here, we report a rare example of molecular spin catalysis involving multistate reactivity in a small-molecule biomimetic copper catalyst applied to aziridination. This behavior is supported by spin state flexibility enabled by the redox-active ligand.
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Affiliation(s)
- Yufeng Ren
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Khaled Cheaib
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Jérémy Jacquet
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Hervé Vezin
- Laboratoire de Spectrochimie Infrarouge et Raman, Univ. Lille, CNRS UMR 8516, 59000, Lille, France
| | - Louis Fensterbank
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Maylis Orio
- Aix Marseille Université, CNRS, Centrale Marseille, iSm2 UMR 7313, 13397, Marseille cedex 20, France
| | - Sébastien Blanchard
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Marine Desage-El Murr
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France.,Institut de Chimie, Université de Strasbourg, 1 rue Blaise Pascal, 67000, Strasbourg, France
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Jacquet J, Cheaib K, Ren Y, Vezin H, Orio M, Blanchard S, Fensterbank L, Desage-El Murr M. Circumventing Intrinsic Metal Reactivity: Radical Generation with Redox-Active Ligands. Chemistry 2017; 23:15030-15034. [PMID: 28873243 DOI: 10.1002/chem.201704049] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Indexed: 01/09/2023]
Abstract
Nickel complexes have gained sustained attention as efficient catalysts in cross-coupling reactions and co-catalysts in dual systems due to their ability to react with radical species. Central to this reactivity is nickel's propensity to shuttle through several accessible redox states from Ni0 to NiIV . Here, we report the catalytic generation of trifluoromethyl radicals from a nickel complex bearing redox-active iminosemiquinone ligands. This unprecedented reactivity is enabled through ligand-based oxidation performing electron transfer to an electrophilic CF3+ source while the nickel oxidation state is preserved. Additionally, extension of this reactivity to a copper complex bearing a single redox equivalent is reported, thus providing a unified reactivity scheme. These results open new pathways in radical chemistry with redox-active ligands.
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Affiliation(s)
- Jérémy Jacquet
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Khaled Cheaib
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Yufeng Ren
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Hervé Vezin
- Laboratoire de Spectrochimie Infrarouge et Raman, Université des Sciences et Technologies de Lille, UMR CNRS 8516, 59655 Villeneuve d'Ascq Cedex, France
| | - Maylis Orio
- Aix Marseille Université, CNRS, Centrale Marseille iSm2 UMR 7313, 13397, Marseille cedex 20, France
| | - Sébastien Blanchard
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Louis Fensterbank
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Marine Desage-El Murr
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France.,Institut de Chimie, Université de Strasbourg, 1 rue Blaise Pascal, 67000, Strasbourg, France
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Vreeken V, Siegler MA, van der Vlugt JI. Controlled Interconversion of a Dinuclear Au Species Supported by a Redox-Active Bridging PNP Ligand Facilitates Ligand-to-Gold Electron Transfer. Chemistry 2017; 23:5585-5594. [PMID: 28248000 PMCID: PMC5413818 DOI: 10.1002/chem.201700360] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Indexed: 12/13/2022]
Abstract
Redox non-innocent ligands have recently emerged as interesting tools to obtain new reactivity with a wide variety of metals. However, gold has almost been neglected in this respect. Here, we report mechanistic investigations related to a rare example of ligand-based redox chemistry in the coordination sphere of gold. The dinuclear metal-centered mixed-valent AuI -AuIII complex 1, supported by monoanionic diarylamido-diphosphine ligand PNPPr and with three chlorido ligands overall, undergoes a complex series of reactions upon halide abstraction by silver salt or Lewis acids such as gallium trichloride. Formation of the ultimate AuI -AuI complex 2 requires the intermediacy of AuI -AuI dimers 5 and 7 as well as the unique AuIII -AuIII complex 6, both of which are interconverted in a feedback loop. Finally, unprecedented ortho-selective C-H activation of the redox-active PNP ligand results in the carbazolyldiphosphine derivative PN*PPr via ligand-to-metal two-electron transfer. This work demonstrates that the redox-chemistry of gold may be significantly expanded and modified when using a reactive ligand scaffold.
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Affiliation(s)
- Vincent Vreeken
- Homogeneous, Supramolecular & Bio-inspired CatalysisVan 't Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamthe Netherlands
| | | | - Jarl Ivar van der Vlugt
- Homogeneous, Supramolecular & Bio-inspired CatalysisVan 't Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamthe Netherlands
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