1
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De Tovar J, Leblay R, Wang Y, Wojcik L, Thibon-Pourret A, Réglier M, Simaan AJ, Le Poul N, Belle C. Copper-oxygen adducts: new trends in characterization and properties towards C-H activation. Chem Sci 2024; 15:10308-10349. [PMID: 38994420 PMCID: PMC11234856 DOI: 10.1039/d4sc01762e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2024] [Accepted: 05/11/2024] [Indexed: 07/13/2024] Open
Abstract
This review summarizes the latest discoveries in the field of C-H activation by copper monoxygenases and more particularly by their bioinspired systems. This work first describes the recent background on copper-containing enzymes along with additional interpretations about the nature of the active copper-oxygen intermediates. It then focuses on relevant examples of bioinorganic synthetic copper-oxygen intermediates according to their nuclearity (mono to polynuclear). This includes a detailed description of the spectroscopic features of these adducts as well as their reactivity towards the oxidation of recalcitrant Csp3 -H bonds. The last part is devoted to the significant expansion of heterogeneous catalytic systems based on copper-oxygen cores (i.e. within zeolite frameworks).
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Affiliation(s)
- Jonathan De Tovar
- Université Grenoble-Alpes, CNRS, Département de Chimie Moléculaire Grenoble France
| | - Rébecca Leblay
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Institut des Sciences Moléculaires de Marseille Marseille France
| | - Yongxing Wang
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Institut des Sciences Moléculaires de Marseille Marseille France
| | - Laurianne Wojcik
- Université de Brest, Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique Brest France
| | | | - Marius Réglier
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Institut des Sciences Moléculaires de Marseille Marseille France
| | - A Jalila Simaan
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Institut des Sciences Moléculaires de Marseille Marseille France
| | - Nicolas Le Poul
- Université de Brest, Laboratoire de Chimie, Electrochimie Moléculaires et Chimie Analytique Brest France
| | - Catherine Belle
- Université Grenoble-Alpes, CNRS, Département de Chimie Moléculaire Grenoble France
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2
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Parkatzidis K, Truong NP, Whitfield R, Campi CE, Grimm-Lebsanft B, Buchenau S, Rübhausen MA, Harrisson S, Konkolewicz D, Schindler S, Anastasaki A. Oxygen-Enhanced Atom Transfer Radical Polymerization through the Formation of a Copper Superoxido Complex. J Am Chem Soc 2023; 145:1906-1915. [PMID: 36626247 DOI: 10.1021/jacs.2c11757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In controlled radical polymerization, oxygen is typically regarded as an undesirable component resulting in terminated polymer chains, deactivated catalysts, and subsequent cessation of the polymerization. Here, we report an unusual atom transfer radical polymerization whereby oxygen favors the polymerization by triggering the in situ transformation of CuBr/L to reactive superoxido species at room temperature. Through a superoxido ARGET-ATRP mechanism, an order of magnitude faster polymerization rate and a rapid and complete initiator consumption can be achieved as opposed to when unoxidized CuBr/L was instead employed. Very high end-group fidelity has been demonstrated by mass-spectrometry and one-pot synthesis of block and multiblock copolymers while pushing the reactions to reach near-quantitative conversions in all steps. A high molecular weight polymer could also be targeted (DPn = 6400) without compromising the control over the molar mass distributions (Đ < 1.20), even at an extremely low copper concentration (4.5 ppm). The versatility of the technique was demonstrated by the polymerization of various monomers in a controlled fashion. Notably, the efficiency of our methodology is unaffected by the purity of the starting CuBr, and even a brown highly-oxidized 15-year-old CuBr reagent enabled a rapid and controlled polymerization with a final dispersity of 1.07, thus not only reducing associated costs but also omitting the need for rigorous catalyst purification prior to polymerization.
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Affiliation(s)
- Kostas Parkatzidis
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich 8093, Switzerland
| | - Nghia P Truong
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich 8093, Switzerland
| | - Richard Whitfield
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich 8093, Switzerland
| | - Chiara E Campi
- Institute of Inorganic and Analytical Chemistry, Justus-Liebig University of Gießen, Heinrich-Buff Ring 17, D-35392, Gießen, Hessen 35392, Germany
| | - Benjamin Grimm-Lebsanft
- Center For Free Electron Laser Science, University of Hamburg, Institut für Nanostruktur und Festkörperphysik, Gebäude 99, Luruper Chaussee 149, Hamburg 22761, Germany
| | - Sören Buchenau
- Center For Free Electron Laser Science, University of Hamburg, Institut für Nanostruktur und Festkörperphysik, Gebäude 99, Luruper Chaussee 149, Hamburg 22761, Germany
| | - Michael A Rübhausen
- Center For Free Electron Laser Science, University of Hamburg, Institut für Nanostruktur und Festkörperphysik, Gebäude 99, Luruper Chaussee 149, Hamburg 22761, Germany
| | - Simon Harrisson
- Laboratoire de Chimie des Polymères Organiques, University of Bordeaux/ENSCBP/CNRS UMR5629, Pessac 33600, France
| | - Dominik Konkolewicz
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - Siegfried Schindler
- Institute of Inorganic and Analytical Chemistry, Justus-Liebig University of Gießen, Heinrich-Buff Ring 17, D-35392, Gießen, Hessen 35392, Germany
| | - Athina Anastasaki
- Laboratory of Polymeric Materials, Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 5, Zurich 8093, Switzerland
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Gómez‐Vidales V, Castillo I. Thioether‐Containing Copper Complexes as PHM, DβM, and TβM Model Systems. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Virginia Gómez‐Vidales
- Instituto de Química Universidad Nacional Autónoma de México Circuito Exterior, CU 04510 México
| | - Ivan Castillo
- Instituto de Química Universidad Nacional Autónoma de México Circuito Exterior, CU 04510 México
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4
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Brückmann T, Becker J, Würtele C, Seuffert MT, Heuler D, Müller-Buschbaum K, Weiß M, Schindler S. Characterization of copper complexes with derivatives of the ligand (2-aminoethyl)bis(2-pyridylmethyl)amine (uns-penp) and their reactivity towards oxygen. J Inorg Biochem 2021; 223:111544. [PMID: 34333248 DOI: 10.1016/j.jinorgbio.2021.111544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 07/05/2021] [Accepted: 07/12/2021] [Indexed: 11/18/2022]
Abstract
A series of copper(I) complexes with ligands derived from the tripodal ligand (2-aminoethyl)bis(2-pyridylmethyl)amine (uns-penp) have been structurally characterized and their redox chemistry analyzed by cyclic voltammetry. While the redox potentials of most of the complexes were similar their reactivity towards dioxygen was quite different. While the complex with a ferrocene derived ligand of uns-penp reacted in solution at low temperatures in a two-step reaction from the preliminary formed mononuclear end-on superoxido complex to a quite stable dinuclear peroxido complex it did not react with dioxygen in the solid state. Other complexes also did not react with dioxygen in the solid state while some showed a reversible formation to a green compound, indicating formation of an end-on superoxido complex that unfortunately so far could not be characterized. In contrast, copper complexes with the Me2uns-penp and Et-iProp-uns-penp formed dinuclear peroxido complexes in a solid-state reaction. While the reaction of dioxygen with the [Cu(Me2uns-penp]BPh4 was quite slow an instant reaction took place for [Cu(Et-iProp-uns-penp]BPh. Very unusual, it turned out that crystals of the copper(I) complex that could be structurally characterized still were crystalline when reacted with dioxygen. Therefore, it was possible to solve the structure of the corresponding dinuclear peroxido complex directly from the same batch of crystals. The crystalline structures of the copper(I) and copper(II) complex revealed that the reason for this is the fact, that the copper(I) complex is kind of preorganized for the uptake of dioxygen and does not really change in its overall structure when being oxidized.
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Affiliation(s)
- Tim Brückmann
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Jonathan Becker
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Christian Würtele
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Marcel Thomas Seuffert
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Dominik Heuler
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Klaus Müller-Buschbaum
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Morten Weiß
- Fakultät für Biologie, Chemie und Geowissenschaften, Universität Bayreuth, Universitätsstrasse 30, 95447 Bayreuth, Germany
| | - Siegfried Schindler
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany.
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5
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Bhadra M, Transue WJ, Lim H, Cowley RE, Lee JYC, Siegler MA, Josephs P, Henkel G, Lerch M, Schindler S, Neuba A, Hodgson KO, Hedman B, Solomon EI, Karlin KD. A Thioether-Ligated Cupric Superoxide Model with Hydrogen Atom Abstraction Reactivity. J Am Chem Soc 2021; 143:3707-3713. [PMID: 33684290 DOI: 10.1021/jacs.1c00260] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The central role of cupric superoxide intermediates proposed in hormone and neurotransmitter biosynthesis by noncoupled binuclear copper monooxygenases like dopamine-β-monooxygenase has drawn significant attention to the unusual methionine ligation of the CuM ("CuB") active site characteristic of this class of enzymes. The copper-sulfur interaction has proven critical for turnover, raising still-unresolved questions concerning Nature's selection of an oxidizable Met residue to facilitate C-H oxygenation. We describe herein a model for CuM, [(TMGN3S)CuI]+ ([1]+), and its O2-bound analog [(TMGN3S)CuII(O2•-)]+ ([1·O2]+). The latter is the first reported cupric superoxide with an experimentally proven Cu-S bond which also possesses demonstrated hydrogen atom abstraction (HAA) reactivity. Introduction of O2 to a precooled solution of the cuprous precursor [1]B(C6F5)4 (-135 °C, 2-methyltetrahydrofuran (2-MeTHF)) reversibly forms [1·O2]B(C6F5)4 (UV/vis spectroscopy: λmax 442, 642, 742 nm). Resonance Raman studies (413 nm) using 16O2 [18O2] corroborated the identity of [1·O2]+ by revealing Cu-O (446 [425] cm-1) and O-O (1105 [1042] cm-1) stretches, and extended X-ray absorption fine structure (EXAFS) spectroscopy showed a Cu-S interatomic distance of 2.55 Å. HAA reactivity between [1·O2]+ and TEMPO-H proceeds rapidly (1.28 × 10-1 M-1 s-1, -135 °C, 2-MeTHF) with a primary kinetic isotope effect of kH/kD = 5.4. Comparisons of the O2-binding behavior and redox activity of [1]+ vs [2]+, the latter a close analog of [1]+ but with all N atom ligation (i.e., N3S vs N4), are presented.
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Affiliation(s)
- Mayukh Bhadra
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Wesley J Transue
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Hyeongtaek Lim
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Ryan E Cowley
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Jung Yoon C Lee
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Maxime A Siegler
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Patrick Josephs
- Department of Chemistry, University of Paderborn, Paderborn D-33098, Germany
| | - Gerald Henkel
- Department of Chemistry, University of Paderborn, Paderborn D-33098, Germany
| | - Markus Lerch
- Institute of Inorganic and Analytical Chemistry, Justus-Liebig University of Gießen, Giessen D-35392, Germany
| | - Siegfried Schindler
- Institute of Inorganic and Analytical Chemistry, Justus-Liebig University of Gießen, Giessen D-35392, Germany
| | - Adam Neuba
- Department of Chemistry, University of Paderborn, Paderborn D-33098, Germany
| | - Keith O Hodgson
- Department of Chemistry, Stanford University, Stanford, California 94305, United States.,Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Britt Hedman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States.,Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, California 94025, United States
| | - Kenneth D Karlin
- Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United States
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6
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Herzigkeit B, Jurgeleit R, Flöser BM, Meißner NE, Engesser TA, Näther C, Tuczek F. Employing Linear Tridentate Ligands with Pyrazole End Groups in Catalytic Tyrosinase Model Chemistry: Does Hemilability Matter? Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900242] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Benjamin Herzigkeit
- Institut für Anorganische Chemie Christian‐Albrechts‐Universität zu Kiel Max‐Eyth‐Straße 2 24118 Kiel Germany
| | - Ramona Jurgeleit
- Institut für Anorganische Chemie Christian‐Albrechts‐Universität zu Kiel Max‐Eyth‐Straße 2 24118 Kiel Germany
| | - Benedikt M. Flöser
- Institut für Anorganische Chemie Christian‐Albrechts‐Universität zu Kiel Max‐Eyth‐Straße 2 24118 Kiel Germany
| | - Nadja E. Meißner
- Institut für Anorganische Chemie Christian‐Albrechts‐Universität zu Kiel Max‐Eyth‐Straße 2 24118 Kiel Germany
| | - Tobias A. Engesser
- Institut für Anorganische Chemie Christian‐Albrechts‐Universität zu Kiel Max‐Eyth‐Straße 2 24118 Kiel Germany
| | - Christian Näther
- Institut für Anorganische Chemie Christian‐Albrechts‐Universität zu Kiel Max‐Eyth‐Straße 2 24118 Kiel Germany
| | - Felix Tuczek
- Institut für Anorganische Chemie Christian‐Albrechts‐Universität zu Kiel Max‐Eyth‐Straße 2 24118 Kiel Germany
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7
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Wern M, Ortmeyer J, Josephs P, Schneider T, Neuba A, Henkel G, Schindler S. Syntheses, characterization, and reactivity of copper complexes with camphor-like tetramethylguanidine ligands. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.09.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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8
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Shimizu I, Morimoto Y, Faltermeier D, Kerscher M, Paria S, Abe T, Sugimoto H, Fujieda N, Asano K, Suzuki T, Comba P, Itoh S. Tetrahedral Copper(II) Complexes with a Labile Coordination Site Supported by a Tris-tetramethylguanidinato Ligand. Inorg Chem 2017; 56:9634-9645. [DOI: 10.1021/acs.inorgchem.7b01154] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Ikuma Shimizu
- Department of Material
and Life Science, Division of Advanced Science and Biotechnology,
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Yuma Morimoto
- Department of Material
and Life Science, Division of Advanced Science and Biotechnology,
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Dieter Faltermeier
- Anorganisch-Chemisches Institut and Interdisciplinary
Center for Scientific Computing, Universität Heidelberg, INF 270, 69120 Heidelberg, Germany
| | - Marion Kerscher
- Anorganisch-Chemisches Institut and Interdisciplinary
Center for Scientific Computing, Universität Heidelberg, INF 270, 69120 Heidelberg, Germany
| | - Sayantan Paria
- Department of Material
and Life Science, Division of Advanced Science and Biotechnology,
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Tsukasa Abe
- Department of Material
and Life Science, Division of Advanced Science and Biotechnology,
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Hideki Sugimoto
- Department of Material
and Life Science, Division of Advanced Science and Biotechnology,
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Nobutaka Fujieda
- Department of Material
and Life Science, Division of Advanced Science and Biotechnology,
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Kaori Asano
- Comprehensive Analysis Center, The Institute of Scientific
and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0057, Japan
| | - Takeyuki Suzuki
- Comprehensive Analysis Center, The Institute of Scientific
and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0057, Japan
| | - Peter Comba
- Anorganisch-Chemisches Institut and Interdisciplinary
Center for Scientific Computing, Universität Heidelberg, INF 270, 69120 Heidelberg, Germany
| | - Shinobu Itoh
- Department of Material
and Life Science, Division of Advanced Science and Biotechnology,
Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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9
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Romo AIB, Abreu DS, de F. Paulo T, Carepo MSP, Sousa EHS, Lemus L, Aliaga C, Batista AA, Nascimento OR, Abruña HD, Diógenes ICN. Hydroxyl Radical Generation and DNA Nuclease Activity: A Mechanistic Study Based on a Surface-Immobilized Copper Thioether Clip-Phen Derivative. Chemistry 2016; 22:10081-9. [DOI: 10.1002/chem.201601719] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Adolfo I. B. Romo
- Departamento de Química Orgânica e Inorgânica; Universidade Federal do Ceará; Cx. Postal 6021 Fortaleza, CE 60451-970 Brasil
| | - Dieric S. Abreu
- Departamento de Química Orgânica e Inorgânica; Universidade Federal do Ceará; Cx. Postal 6021 Fortaleza, CE 60451-970 Brasil
| | - Tércio de F. Paulo
- Departamento de Química Orgânica e Inorgânica; Universidade Federal do Ceará; Cx. Postal 6021 Fortaleza, CE 60451-970 Brasil
| | - Marta S. P. Carepo
- Departamento de Química Orgânica e Inorgânica; Universidade Federal do Ceará; Cx. Postal 6021 Fortaleza, CE 60451-970 Brasil
| | - Eduardo H. S. Sousa
- Departamento de Química Orgânica e Inorgânica; Universidade Federal do Ceará; Cx. Postal 6021 Fortaleza, CE 60451-970 Brasil
| | - Luis Lemus
- Facultad de Química y Biología; Universidad de Santiago de Chile, Alameda 3363, Estación Central; Santiago Chile
| | - Carolina Aliaga
- Facultad de Química y Biología; Universidad de Santiago de Chile, Alameda 3363, Estación Central; Santiago Chile
- Centro para el Desarrollo de la Nanociencia y la Nanotecnología; CEDENNA; Santiago Chile
| | - Alzir A. Batista
- Departamento de Química; Universidade Federal de São Carlos; CP 676, CEP 13565-905 São Carlos, SP Brazil
| | - Otaciro R. Nascimento
- Departamento de Física e Informática; Instituto de Física de São Carlos; Universidade de São Paulo; CP 369, CEP 13560-970 São Carlos, SP Brazil
| | - Héctor D. Abruña
- Department of Chemistry and Chemical Biology; Cornell University; Ithaca NY 14853-1301 USA
| | - Izaura C. N. Diógenes
- Departamento de Química Orgânica e Inorgânica; Universidade Federal do Ceará; Cx. Postal 6021 Fortaleza, CE 60451-970 Brasil
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10
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Neuba A, Rohrmüller M, Hölscher R, Schmidt WG, Henkel G. A panel of peralkylated sulfur–guanidine type bases: Novel pro-ligands for use in biomimetic coordination chemistry. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.03.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Kim S, Lee JY, Cowley RE, Ginsbach JW, Siegler MA, Solomon EI, Karlin KD. A N3S(thioether)-ligated Cu(II)-superoxo with enhanced reactivity. J Am Chem Soc 2015; 137:2796-9. [PMID: 25697226 DOI: 10.1021/ja511504n] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Previous efforts to synthesize a cupric superoxide complex possessing a thioether donor have resulted in the formation of an end-on trans-peroxo-dicopper(II) species, [{(Ligand)Cu(II)}2(μ-1,2-O2(2-))](2+). Redesign/modification of previous N3S tetradentate ligands has now allowed for the stabilization of the monomeric, superoxide product possessing a S(thioether) ligation, [((DMA)N3S)Cu(II)(O2(•-))](+) (2(S)), as characterized by UV-vis and resonance Raman spectroscopies. This complex mimics the putative Cu(II)(O2(•-)) active species of the copper monooxygenase PHM and exhibits enhanced reactivity toward both O-H and C-H substrates in comparison to close analogues [(L)Cu(II)(O2(•-))](+), where L contains only nitrogen donor atoms. Also, comparisons of [(L)Cu(II/I)](n+) compound reduction potentials (L = various N4 vs (DMA)N3S ligands) provide evidence that (DMA)N3S is a weaker donor to copper ion than is found for any N4 ligand-complex.
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Affiliation(s)
- Sunghee Kim
- Department of Chemistry, Johns Hopkins University , Baltimore, Maryland 21218, United States
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12
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Flörke U, Neuba A, Ortmeyer J, Henkel G. Crystal structure of 2,2′-({[2-(tritylsulfanyl)benzyl]azanediyl}bis(ethane-2,1-diyl))bis(isoindoline-1,3-dione). Acta Crystallogr Sect E Struct Rep Online 2014; 70:o895-6. [PMID: 25309240 PMCID: PMC4186125 DOI: 10.1107/s1600536814015554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 07/03/2014] [Indexed: 11/10/2022]
Abstract
In the structure of the title compound, C46H37N3O4S, the planes of the two isoindoline units make a dihedral angle of 77.86 (3)°. The dihedral angles between the benzyl plane and the isoindoline units are 79.56 (4) and 3.74 (9)°. The geometry at the S atom shows a short [1.7748 (17) Å] S—Cbenzyland a long [1.8820 (15) Å] S—Ctritylbond and the C—S—C angle is 108.40 (7)°. N—C bond lengths around the azane N atom are in the range 1.454 (2)–1.463 (2) Å. he crystal packing exhibts two rather `non-classical' C—H...O hydrogen bonds that result in stacking of the molecules along theaas well as thebaxis and give rise to columnar sub-structures.
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13
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Kim S, Ginsbach JW, Billah AI, Siegler MA, Moore CD, Solomon EI, Karlin KD. Tuning of the copper-thioether bond in tetradentate N₃S(thioether) ligands; O-O bond reductive cleavage via a [Cu(II)₂(μ-1,2-peroxo)]²⁺/[Cu(III)₂(μ-oxo)₂]²⁺ equilibrium. J Am Chem Soc 2014; 136:8063-71. [PMID: 24854766 PMCID: PMC4063178 DOI: 10.1021/ja502974c] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Current interest in copper/dioxygen reactivity includes the influence of thioether sulfur ligation, as it concerns the formation, structures, and properties of derived copper-dioxygen complexes. Here, we report on the chemistry of {L-Cu(I)}2-(O2) species L = (DMM)ESE, (DMM)ESP, and (DMM)ESDP, which are N3S(thioether)-based ligands varied in the nature of a substituent on the S atom, along with a related N3O(ether) (EOE) ligand. Cu(I) and Cu(II) complexes have been synthesized and crystallographically characterized. Copper(I) complexes are dimeric in the solid state, [{L-Cu(I)}2](B(C6F5)4)2, however are shown by diffusion-ordered NMR spectroscopy to be mononuclear in solution. Copper(II) complexes with a general formulation [L-Cu(II)(X)](n+) {X = ClO4(-), n = 1, or X = H2O, n = 2} exhibit distorted square pyramidal coordination geometries and progressively weaker axial thioether ligation across the series. Oxygenation (-130 °C) of {((DMM)ESE)Cu(I)}(+) results in the formation of a trans-μ-1,2-peroxodicopper(II) species [{((DMM)ESE)Cu(II)}2(μ-1,2-O2(2-))](2+) (1(P)). Weakening the Cu-S bond via a change to the thioether donor found in (DMM)ESP leads to the initial formation of [{((DMM)ESP)Cu(II)}2(μ-1,2-O2(2-))](2+) (2(P)) that subsequently isomerizes to a bis-μ-oxodicopper(III) complex, [{((DMM)ESP)Cu(III)}2(μ-O(2-))2](2+) (2(O)), with 2(P) and 2(O) in equilibrium (K(eq) = [2(O)]/[2(P)] = 2.6 at -130 °C). Formulations for these Cu/O2 adducts were confirmed by resonance Raman (rR) spectroscopy. This solution mixture is sensitive to the addition of methylsulfonate, which shifts the equilibrium toward the bis-μ-oxo isomer. Further weakening of the Cu-S bond in (DMM)ESDP or substitution with an ether donor in (DMM)EOE leads to only a bis-μ-oxo species (3(O) and 4(O), respectively). Reactivity studies indicate that the bis-μ-oxodicopper(III) species (2(O), 3(O)) and not the trans-peroxo isomers (1(P) and 2(P)) are responsible for the observed ligand sulfoxidation. Our findings concerning the existence of the 2(P)/2(O) equilibrium contrast with previously established ligand-Cu(I)/O2 reactivity and possible implications are discussed.
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Affiliation(s)
- Sunghee Kim
- Department of Chemistry, Johns Hopkins University , Baltimore, Maryland 21218, United States
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