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Kamatchi TS, Mondal S, Scherer T, Bubrin M, Natarajan K, Kaim W. Near-Infrared-Absorbing Organometallic Diruthenium Complex Intermediates: Evidence for Bridging Anthrasemiquinone Formation and against Mixed Valency. Chemistry 2017; 23:17810-17816. [DOI: 10.1002/chem.201703888] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Indexed: 11/08/2022]
Affiliation(s)
| | - Sudipta Mondal
- Institut für Anorganische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70550 Stuttgart Germany
| | - Thomas Scherer
- Institut für Anorganische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70550 Stuttgart Germany
| | - Martina Bubrin
- Institut für Anorganische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70550 Stuttgart Germany
| | | | - Wolfgang Kaim
- Institut für Anorganische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70550 Stuttgart Germany
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Abstract
The potential of redox-active ligands to behave "noninnocently" in transition-metal coordination compounds is reflected with respect to various aspects and situations. These include the question of establishing "correct" oxidation states, the identification and characterization of differently charged radical ligands, the listing of structural and other consequences of ligand redox reactions, and the distinction between barrierless delocalized "resonance" cases M(n)/L(n) ↔ M(n+1)L(n-1) versus separated valence tautomer equilibrium situations M(n)/L(n) ⇌ M(n+1)L(n-1). Further ambivalence arises for dinuclear systems with radical bridge M(n)(μ-L(•))M(n) versus mixed-valent alternatives M(n+1)(μ-L(-))M(n), for noninnocent ligand-bridged coordination compounds of higher nuclearity such as (μ(3)-L)M(3), (μ(4)-L)M(4), (μ-L)(4)M(4), or coordination polymers. Conversely, the presence of more than one noninnocently behaving ligand at a single transition-metal site in situations such as L(n)-M-L(n-1) or L(•)-M-L(•) may give rise to corresponding ligand-to-ligand interaction phenomena (charge transfer, electron hopping, and spin-spin coupling) and to redox-induced electron transfer with counterintuitive oxidation-state changes. The relationships of noninnocent ligand behavior with excited-state descriptions and perspectives regarding material properties and single-electron or multielectron reactivity are also illustrated briefly.
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Affiliation(s)
- Wolfgang Kaim
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany.
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Choua S, Djukic JP, Dalléry J, Bieber A, Welter R, Gisselbrecht JP, Turek P, Ricard L. Stable and Highly Persistent Quinoxaline-Centered Metalloorganic Radical Anions: Preparation, Structural, Spectroscopic, and Computational Investigations. Inorg Chem 2008; 48:149-63. [DOI: 10.1021/ic801434h] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sylvie Choua
- Institut de Chimie de Strasbourg, CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France, and Laboratoire Hétéro-Eléments et Coordination, CNRS, Ecole Polytechnique, route de Saclay, 91128 Palaiseau Cedex, France
| | - Jean-Pierre Djukic
- Institut de Chimie de Strasbourg, CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France, and Laboratoire Hétéro-Eléments et Coordination, CNRS, Ecole Polytechnique, route de Saclay, 91128 Palaiseau Cedex, France
| | - Jérôme Dalléry
- Institut de Chimie de Strasbourg, CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France, and Laboratoire Hétéro-Eléments et Coordination, CNRS, Ecole Polytechnique, route de Saclay, 91128 Palaiseau Cedex, France
| | - André Bieber
- Institut de Chimie de Strasbourg, CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France, and Laboratoire Hétéro-Eléments et Coordination, CNRS, Ecole Polytechnique, route de Saclay, 91128 Palaiseau Cedex, France
| | - Richard Welter
- Institut de Chimie de Strasbourg, CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France, and Laboratoire Hétéro-Eléments et Coordination, CNRS, Ecole Polytechnique, route de Saclay, 91128 Palaiseau Cedex, France
| | - Jean-Paul Gisselbrecht
- Institut de Chimie de Strasbourg, CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France, and Laboratoire Hétéro-Eléments et Coordination, CNRS, Ecole Polytechnique, route de Saclay, 91128 Palaiseau Cedex, France
| | - Philippe Turek
- Institut de Chimie de Strasbourg, CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France, and Laboratoire Hétéro-Eléments et Coordination, CNRS, Ecole Polytechnique, route de Saclay, 91128 Palaiseau Cedex, France
| | - Louis Ricard
- Institut de Chimie de Strasbourg, CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, 67000 Strasbourg, France, and Laboratoire Hétéro-Eléments et Coordination, CNRS, Ecole Polytechnique, route de Saclay, 91128 Palaiseau Cedex, France
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Donovan-Merkert BT, Rieger PH, Geiger WE. Reactions of Odd-Electron Cobaltacycles: Characterization of a Persistent 17-Electron Anionic Intermediate in Electron-Transfer-Catalyzed (ETC) Substitution Reactions. Organometallics 1999. [DOI: 10.1021/om990246g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bernadette T. Donovan-Merkert
- Departments of Chemistry, University of Vermont, Burlington, Vermont 05405, and Brown University, Providence, Rhode Island 02912
| | - Philip H. Rieger
- Departments of Chemistry, University of Vermont, Burlington, Vermont 05405, and Brown University, Providence, Rhode Island 02912
| | - William E. Geiger
- Departments of Chemistry, University of Vermont, Burlington, Vermont 05405, and Brown University, Providence, Rhode Island 02912
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Hilgers F, Bruns W, Fiedler J, Kaim W. UV-vis, IR and EPR spectroelectrochemical study of the EC redox transition [(PR3)n(CO)3(R′-pz)M]+/0; M = Mo, W; R′-pz = N-alkylpyrazinium; R = isopropyl, cyclohexyl; n = 1 or 2. J Organomet Chem 1996. [DOI: 10.1016/0022-328x(95)05933-g] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Klein A, Vogler C, Kaim W. The δ in 18 + δ Electron Complexes: Importance of the Metal/Ligand Interface for the Substitutional Reactivity of “Re(0)” Complexes (α-diimine-)ReI(CO)3(X). Organometallics 1996. [DOI: 10.1021/om950500e] [Citation(s) in RCA: 138] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Axel Klein
- Institut für Anorganische Chemie der Universität, D-70550 Stuttgart, Germany
| | - Conny Vogler
- Institut für Anorganische Chemie der Universität, D-70550 Stuttgart, Germany
| | - Wolfgang Kaim
- Institut für Anorganische Chemie der Universität, D-70550 Stuttgart, Germany
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Gross-Lannert R, Kaim W, Lechner U, Roth E, Vogler C. Zur Reaktion aromatischer Phosphan-Derivate mit Elektronen. IV. Die Bedeutung niedrig liegender unbesetzter Orbitale Phosphor f�r Beweglichkeit und Koordinationsf�higkeit von PR2-Substituenten in reduzierten p-Phenylendiphosphanen. Z Anorg Allg Chem 1989. [DOI: 10.1002/zaac.19895790106] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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