1
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Wolfarth SA, Colicchio NG, Nataro CS, Reinheimer EW, Nataro C. Cleavage of the dimeric heterometallic complexes [Pd(dppf)(μ-Cl)]2[BArF24]2 (dppf = 1,1′-bis(diphenylphosphino)ferrocene, BArF24 = tetrakis(bis-3,5-trifluoromethylphenyl)borate) via addition of monodentate phosphine ligands. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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2
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Dahlen M, Vázquez Quesada J, Santos Correa L, Münzfeld L, Reinfandt N, Klopper W, Roesky PW. Investigation of the Coordination Chemistry of a Bisamidinate Ferrocene Ligand with Cu, Ag, and Au. ACS OMEGA 2022; 7:4683-4693. [PMID: 35155960 PMCID: PMC8829862 DOI: 10.1021/acsomega.1c07036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 01/10/2022] [Indexed: 06/14/2023]
Abstract
The coordination chemistry of a ferrocene ligand with one bulky amidinate function attached to each ring toward two different coinage metal precursors was investigated. In dependence of the metal and the co-ligands, "ansa" type structures and non-bridged structures were obtained. Six different compounds are reported. In the "ansa" type structures, short Fe-M (M = Cu, Ag) distances were observed in the molecular structures in the solid state. However, theoretical calculations (DFT) did not reveal a stabilizing metal-metal interaction. Instead, dispersion interactions within the ligand and between the ligand and metal seem to represent the main stabilization forces.
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Affiliation(s)
- Milena Dahlen
- Institute
of Inorganic Chemistry, Karlsruhe Institute
of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Juana Vázquez Quesada
- Institute
of Physical Chemistry, Karlsruhe Institute
of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Luis Santos Correa
- Institute
of Inorganic Chemistry, Karlsruhe Institute
of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Luca Münzfeld
- Institute
of Inorganic Chemistry, Karlsruhe Institute
of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Niklas Reinfandt
- Institute
of Inorganic Chemistry, Karlsruhe Institute
of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Wim Klopper
- Institute
of Physical Chemistry, Karlsruhe Institute
of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Peter W. Roesky
- Institute
of Inorganic Chemistry, Karlsruhe Institute
of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
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3
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Ruiz AT, Bousquet MHE, Pascal S, Canard G, Mazan V, Elhabiri M, Jacquemin D, Siri O. Small Panchromatic and NIR Absorbers from Quinoid Zwitterions. Org Lett 2020; 22:7997-8001. [PMID: 32991186 DOI: 10.1021/acs.orglett.0c02926] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The transamination of oxoaminobenzoquinonemonoimine (BQI derivatives), an unconventional zwitterionic quinone, allows isolation of a series of compounds featuring electron-donating aryl auxochromes. The substitution has a very strong impact on the electrochemical and optical features, which is rationalized by theoretical calculations. Protonation and alkylation of the BQIs toward the corresponding cations lead to surprising red-shifts of the absorption, especially in the instance of the most electron-rich dyes that exhibit panchromatic absorption spanning up to the near-infrared (NIR) region, a remarkable achievement for such small molecules.
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Affiliation(s)
- Angélina Torres Ruiz
- Aix-Marseille Université, CNRS UMR 7325, Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Campus de Luminy, Marseille 13288 Cedex 09, France
| | - Manon H E Bousquet
- Laboratoire CEISAM, CNRS UMR 6230, Université de Nantes, 2, rue de la Houssinière, 44322 Nantes, France
| | - Simon Pascal
- Aix-Marseille Université, CNRS UMR 7325, Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Campus de Luminy, Marseille 13288 Cedex 09, France
| | - Gabriel Canard
- Aix-Marseille Université, CNRS UMR 7325, Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Campus de Luminy, Marseille 13288 Cedex 09, France
| | - Valérie Mazan
- Université de Strasbourg, Université de Haute-Alsace, CNRS, LIMA, UMR 7042, Equipe Chimie Bioorganique et Médicinale, ECPM, 25 Rue Becquerel, 67000 Strasbourg, France
| | - Mourad Elhabiri
- Université de Strasbourg, Université de Haute-Alsace, CNRS, LIMA, UMR 7042, Equipe Chimie Bioorganique et Médicinale, ECPM, 25 Rue Becquerel, 67000 Strasbourg, France
| | - Denis Jacquemin
- Laboratoire CEISAM, CNRS UMR 6230, Université de Nantes, 2, rue de la Houssinière, 44322 Nantes, France
| | - Olivier Siri
- Aix-Marseille Université, CNRS UMR 7325, Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Campus de Luminy, Marseille 13288 Cedex 09, France
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4
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Divya D, Nagarajaprakash R, Vidhyapriya P, Sakthivel N, Manimaran B. Single-Pot Self-Assembly of Heteroleptic Mn(I)-Based Aminoquinonato-Bridged Ester/Amide-Functionalized Dinuclear Metallastirrups: Potential Anticancer and Visible-Light-Triggered CORMs. ACS OMEGA 2019; 4:12790-12802. [PMID: 31460403 PMCID: PMC6682026 DOI: 10.1021/acsomega.9b01438] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 07/12/2019] [Indexed: 05/23/2023]
Abstract
Multicomponent self-assembly of Mn2(CO)10, a bis-chelating aminoquinonato (ON∩ON) bridge (L), and an ester/amide-functionalized flexible neutral ditopic linker (L') has resulted into the formation of M2LL'-type manganese(I)-based dinuclear metallastirrups of general formula [{(CO)3Mn(μ-η4-L)Mn(CO)3}(μ-L')] (1-10). Compounds 1-10 were accomplished via orthogonal bonding of the aminoquinone ligand (2,5-bis(n-butylamino)-1,4-benzoquinone/2,5-bis(phenethylamino)-1,4-benzoquinone) and ditopic pyridyl ligand to manganese carbonyl. The resultant metallastirrups were characterized using elemental analyses and IR, UV-vis, 1H NMR, and electrospray ionization-mass spectroscopic techniques. The molecular structure of 6 was confirmed by single-crystal X-ray diffraction methods. Furthermore, molecular recognition capabilities of 1, 5, 7, and 9 were evaluated with aromatic compounds containing hydroxy/amine functionalities. Anticancer activities of compounds 1-3, 5-7, 9, and 10 were investigated against three cancer cell lines, that is, lung (A549), colon (HCT-15), and cervical (HeLa) as well as on normal cells (HEK 293). Compound 9 showed a broad-spectrum inhibition toward these cancer cells upon exposure to visible light. The myoglobin assay was performed using UV-vis absorption spectroscopy to investigate the visible-light-triggered CO release from 5 and 9 that could be related to their ability to effectively inhibit cancer cells. In addition, morphological studies confirmed the induction of autophagy due to the treatment of cancer cells using compound 9.
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Affiliation(s)
- Dhanaraj Divya
- Department
of Chemistry and Department of Biotechnology, Pondicherry
University, Puducherry 605014, India
| | - Ramamurthy Nagarajaprakash
- Chemical
Sciences Research Group, Division of Research & Development, Lovely Professional University, Phagwara 144411, Punjab, India
| | - Pitchavel Vidhyapriya
- Department
of Chemistry and Department of Biotechnology, Pondicherry
University, Puducherry 605014, India
| | - Natarajan Sakthivel
- Department
of Chemistry and Department of Biotechnology, Pondicherry
University, Puducherry 605014, India
| | - Bala. Manimaran
- Department
of Chemistry and Department of Biotechnology, Pondicherry
University, Puducherry 605014, India
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5
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Bhunia A, Vojtíšek P, Manna SC. DFT/TD-DFT calculation, photophysical properties, DNA/protein binding and catecholase activity of chelating ligand based trigonal bipyramidal copper(II) complexes. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2018.11.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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6
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Chen JL, Zeng XH, Ganesan P, He LH, Liao JS, Liu SJ, Wen HR, Zhao F, Chi Y. Heterobimetallic copper(i) complexes bearing both 1,1′-bis(diphenylphosphino)ferrocene and functionalized 3-(2′-pyridyl)-1,2,4-triazole. NEW J CHEM 2019. [DOI: 10.1039/c8nj05924a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper(i) 1,1′-bis(diphenylphosphino)ferrocene complexes are well regulated by functional 3-(2′-pyridyl)-1,2,4-triazole exhibiting mono-anionic η2(N1,N2) and neutral η2(N1,N2) and η2(N1,N4) chelating modes.
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Affiliation(s)
- Jing-Lin Chen
- School of Metallurgy and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
- State Key Laboratory of Structural Chemistry
| | - Xue-Hua Zeng
- School of Metallurgy and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - Paramaguru Ganesan
- Department of Chemistry and Low Carbon Energy Research Center
- National Tsing Hua University
- Hsinchu 30013
- Taiwan
| | - Li-Hua He
- School of Metallurgy and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - Jin-Sheng Liao
- School of Metallurgy and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - Sui-Jun Liu
- School of Metallurgy and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - He-Rui Wen
- School of Metallurgy and Chemical Engineering
- Jiangxi University of Science and Technology
- Ganzhou 341000
- P. R. China
| | - Feng Zhao
- School of Chemistry and Chemical Engineering
- Jiangxi Science and Technology Normal University
- Nanchang 330013
- P. R. China
| | - Yun Chi
- Department of Chemistry and Low Carbon Energy Research Center
- National Tsing Hua University
- Hsinchu 30013
- Taiwan
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7
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Govindarajan R, Divya D, Nagarajaprakash R, Manimaran B. Synthesis and Characterization of Aminoquinonato Bridged Re(I)-Based Amide Functionalized Dinuclear Metallastirrups and Tetranuclear Lemniscate Metallacycles. ChemistrySelect 2018. [DOI: 10.1002/slct.201800296] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Dhanaraj Divya
- Department of Chemistry; Pondicherry University; Puducherry 605014 India
| | | | - Bala. Manimaran
- Department of Chemistry; Pondicherry University; Puducherry 605014 India
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8
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Canard G, Chen Z, Suryaningtias A, Jean M, Vanthuyne N, Giorgi M, Roussel C, Siri O. Regioselective addition of DDQ on a quinoid ring: an entry into chiral zwitterionic bridging ligands. NEW J CHEM 2018. [DOI: 10.1039/c7nj03765a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Michael-type addition of DDQ on a zwitterionic ligand is described together with the chiral separation and full characterization of the two enantiomers of one derivative. These adducts offer a novel entry into chiral zwitterionic quinoidal ligands.
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Affiliation(s)
- Gabriel Canard
- Aix Marseille Univ
- CNRS
- CINaM (UMR 7325)
- Campus de Luminy
- 13288 Marseille cedex 09
| | - Zhongrui Chen
- Aix Marseille Univ
- CNRS
- CINaM (UMR 7325)
- Campus de Luminy
- 13288 Marseille cedex 09
| | | | - Marion Jean
- Aix Marseille Univ
- CNRS
- Centrale Marseille
- ISM2 Marseille
- France
| | | | | | | | - Olivier Siri
- Aix Marseille Univ
- CNRS
- CINaM (UMR 7325)
- Campus de Luminy
- 13288 Marseille cedex 09
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9
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Schrempp DF, Schneider E, Kaifer E, Wadepohl H, Himmel HJ. Homo- and Heterobinuclear Cu and Pd Complexes with a Bridging Redox-Active Bisguanidino-Substituted Dioxolene Ligand: Electronic Structure and Metal-Ligand Electron-Transfer. Chemistry 2017; 23:11636-11648. [DOI: 10.1002/chem.201702053] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Indexed: 12/17/2022]
Affiliation(s)
- David Fridolin Schrempp
- Anorganisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 275 69120 Heidelberg Germany
| | - Elisa Schneider
- Anorganisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 275 69120 Heidelberg Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 275 69120 Heidelberg Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 275 69120 Heidelberg Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 275 69120 Heidelberg Germany
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10
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Manck S, Röger M, van der Meer M, Sarkar B. Heterotri‐ and Heteropentanuclear Copper(I)–Ferrocenyl Complexes Assembled through a “Click” Strategy: A Structural, Electrochemical, and Spectroelectrochemical Investigation. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201601075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sinja Manck
- Institut für Chemie und Biochemie, Anorganische ChemieFreie Universität BerlinFabeckstraße 34‐3614195BerlinGermany
| | - Marc Röger
- Institut für Chemie und Biochemie, Anorganische ChemieFreie Universität BerlinFabeckstraße 34‐3614195BerlinGermany
| | - Margarethe van der Meer
- Institut für Chemie und Biochemie, Anorganische ChemieFreie Universität BerlinFabeckstraße 34‐3614195BerlinGermany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische ChemieFreie Universität BerlinFabeckstraße 34‐3614195BerlinGermany
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11
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van der Meer M, Rechkemmer Y, Frank U, Breitgoff FD, Hohloch S, Su CY, Neugebauer P, Marx R, Dörfel M, van Slageren J, Sarkar B. A Dicobalt Complex with an Unsymmetrical Quinonoid Bridge Isolated in Three Units of Charge: A Combined Structural, (Spectro)electrochemical, Magnetic and Spectroscopic Study. Chemistry 2016; 22:13884-13893. [DOI: 10.1002/chem.201601579] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Indexed: 01/28/2023]
Affiliation(s)
- Margarethe van der Meer
- Institut für Chemie und Biochemie; Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
| | - Yvonne Rechkemmer
- Institut für Physikalische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Uta Frank
- Institut für Chemie und Biochemie; Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
| | - Frauke D. Breitgoff
- Institut für Physikalische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Stephan Hohloch
- Institut für Chemie und Biochemie; Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
| | - Cheng-Yong Su
- School of Chemistry and Chemical Engineering; Sun Yat-Sen University; Guangzhou 510275 China
| | - Petr Neugebauer
- Institut für Physikalische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Raphael Marx
- Institut für Physikalische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - María Dörfel
- Institut für Physikalische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Joris van Slageren
- Institut für Physikalische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie; Anorganische Chemie; Freie Universität Berlin; Fabeckstraße 34-36 14195 Berlin Germany
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12
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Plater MJ, Harrison WTA. A purple odyssey: synthesis and structure of 3-amino-4-hydroxy-6-oxocyclohexa-2,4-dien-1-iminium chloride monohydrate. Acta Crystallogr E Crystallogr Commun 2016; 72:604-7. [PMID: 27307999 PMCID: PMC4908533 DOI: 10.1107/s2056989016005107] [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: 03/24/2016] [Accepted: 03/25/2016] [Indexed: 11/30/2022]
Abstract
The unequal C—C bond lengths in the six-membered ring of the C6H7N2O2+ cation of the title compound can be understood in terms of two separate delocalized systems. In the cation of the title hydrated molecular salt, C6H7N2O2+·Cl−·H2O, the six-membered ring shows unequal bond lengths consistent with delocalization of electrons over two separate 6π systems with single bonds between them. In the crystal, the components are linked by N—H⋯Cl, N—H⋯O, O—H⋯Cl and O—H⋯O hydrogen bonds, generating double layers propagating in (100).
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13
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Yuan M, Tanabe I, Bernard-Schaaf JM, Shi QY, Schlegel V, Schurhammer R, Dowben PA, Doudin B, Routaboul L, Braunstein P. Influence of steric hindrance on the molecular packing and the anchoring of quinonoid zwitterions on gold surfaces. NEW J CHEM 2016. [DOI: 10.1039/c5nj03251b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The N-substituent on quinonoid zwitterions influences the molecules packing and impacts their anchoring on gold surfaces.
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14
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Kar P, Yoshida M, Kobayashi A, Routaboul L, Braunstein P, Kato M. Colour tuning by the stepwise synthesis of mononuclear and homo- and hetero-dinuclear platinum(ii) complexes using a zwitterionic quinonoid ligand. Dalton Trans 2016; 45:14080-8. [DOI: 10.1039/c6dt02328b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The colour of a mononuclear Pt(ii) complex bearing a [O,N,N,O] quinonoid ligand is judiciously tuned by stepwise deprotonation and successive homo- and hetero-metalation.
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Affiliation(s)
- Paramita Kar
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- Sapporo
- Japan
| | - Masaki Yoshida
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- Sapporo
- Japan
| | - Atsushi Kobayashi
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- Sapporo
- Japan
| | - Lucie Routaboul
- Laboratoire de Chimie de Coordination
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- F-67081 Strasbourg Cedex
- France
| | - Pierre Braunstein
- Laboratoire de Chimie de Coordination
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- F-67081 Strasbourg Cedex
- France
| | - Masako Kato
- Department of Chemistry
- Faculty of Science
- Hokkaido University
- Sapporo
- Japan
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15
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van der Meer M, Rechkemmer Y, Breitgoff FD, Dechert S, Marx R, Dörfel M, Neugebauer P, van Slageren J, Sarkar B. Probing bistability in FeIIand CoIIcomplexes with an unsymmetrically substituted quinonoid ligand. Dalton Trans 2016; 45:8394-403. [DOI: 10.1039/c6dt00757k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A quinone ligand with a [O,O,O,N] donor set is presented. Its FeIIcomplex displays bistability as a function of temperature, pressure and photoexcitation and its CoIIcomplex displays a redox-induced spin-state change.
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Affiliation(s)
| | - Yvonne Rechkemmer
- Institut für Physikalische Chemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - Frauke D. Breitgoff
- Institut für Physikalische Chemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - Sebastian Dechert
- Institut für Anorganische Chemie
- Georg-August-Universität Göttingen
- D-37077 Göttingen
- Germany
| | - Raphael Marx
- Institut für Physikalische Chemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - María Dörfel
- Institut für Physikalische Chemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - Petr Neugebauer
- Institut für Physikalische Chemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - Joris van Slageren
- Institut für Physikalische Chemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie
- Freie Universität Berlin
- D-14195 Berlin
- Germany
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16
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van der Meer M, Manck S, Sobottka S, Plebst S, Sarkar B. Redox Activity and Bond Activation in Iridium–Diamidobenzene Complexes: A Combined Structural, (Spectro)electrochemical, and DFT Investigation. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00716] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Margarethe van der Meer
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin, Germany
| | - Sinja Manck
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin, Germany
| | - Sebastian Sobottka
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin, Germany
| | - Sebastian Plebst
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569, Stuttgart, Germany
| | - Biprajit Sarkar
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin, Germany
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17
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Govindarajan R, Nagarajaprakash R, Manimaran B. Synthesis, Structural Characterization, and Host–Guest Studies of Aminoquinonato-Bridged Re(I) Supramolecular Rectangles. Inorg Chem 2015; 54:10686-94. [DOI: 10.1021/acs.inorgchem.5b01543] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- R. Govindarajan
- Department
of Chemistry, Pondicherry University, Puducherry 605014, India
| | - R. Nagarajaprakash
- Department
of Chemistry, Pondicherry University, Puducherry 605014, India
| | - Bala. Manimaran
- Department
of Chemistry, Pondicherry University, Puducherry 605014, India
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18
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19
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Kauf T, Rosa V, Fliedel C, Pattacini R, Deibel N, Avilés T, Sarkar B, Braunstein P. Reactivity of TCNE and TCNQ derivatives of quinonoid zwitterions with Cu(I). Dalton Trans 2015; 44:5441-50. [PMID: 25689916 DOI: 10.1039/c4dt03956d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactions of TCNE- and TCNQ-functionalized (TCNE: tetracyanoethylene and TCNQ: 7,7',8,8'-tetracyanoquinodimethane) zwitterionic benzoquinonemonoimines with a Cu(I)-BIAN complex (BIAN = bis(o,o'-bisisopropylphenyl)acenaphthenequinonediimine) have been investigated and found to follow a diversity of interesting patterns. The complexes [Cu(BIAN)(NCMe)(L2)]BF4 (2) and [Cu(BIAN)(L2)2]BF4 (4) were obtained by reacting [Cu(BIAN)(NCMe)2]BF4 (1) with one and two equivalents of L2, respectively. Following similar procedures, the complexes [Cu(BIAN)(NCMe)(L3)]BF4 (6) and [Cu(BIAN)(L3)2]BF4 (7) were obtained by reaction of 1 with L3. The reaction of 2 with 0.5 equiv. of 4,4'-bipyridine afforded [{Cu(BIAN)(L2)}2(μ-4,4'-bipyridine)](BF4)2 (3). The complexes were characterized by multinuclear NMR, IR and UV-Vis spectroscopic techniques, mass spectrometry, cyclic voltammetry and elemental analysis. The molecular structures of complexes 3 ·4CH2Cl2 and 4 ·CH2Cl2 were determined by single crystal X-ray diffraction. An unexpected coordination polymer [Cu((L2-))2]∞ (5) was also structurally characterized, which contains Cu(II) centres chelated by two N,O-bound ligands resulting from the monodeprotonation of L2.
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Affiliation(s)
- Thomas Kauf
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, F-67081 Strasbourg Cedex, France.
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20
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Hettmanczyk L, Manck S, Hoyer C, Hohloch S, Sarkar B. Heterobimetallic complexes with redox-active mesoionic carbenes as metalloligands: electrochemical properties, electronic structures and catalysis. Chem Commun (Camb) 2015; 51:10949-52. [DOI: 10.1039/c5cc01578b] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Electronic structures and redox-induced catalysis are presented with the first example of heterobimetallic ferrocenyl–Au(i) complexes with mesoionic carbenes.
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Affiliation(s)
- Lara Hettmanczyk
- Institut für Chemie und Biochemie
- Freie Universität Berlin
- Berlin
- Germany
| | - Sinja Manck
- Institut für Chemie und Biochemie
- Freie Universität Berlin
- Berlin
- Germany
| | - Carolin Hoyer
- Institut für Chemie und Biochemie
- Freie Universität Berlin
- Berlin
- Germany
| | - Stephan Hohloch
- Institut für Chemie und Biochemie
- Freie Universität Berlin
- Berlin
- Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie
- Freie Universität Berlin
- Berlin
- Germany
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21
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Saha P, Saha Roy A, Weyhermüller T, Ghosh P. Metal ion promoted tautomerization and C-N bond cleavage: conversion of catechol to a p-benzoquinone derivative. Chem Commun (Camb) 2014; 50:13073-6. [PMID: 25225674 DOI: 10.1039/c4cc05286b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal ion promoted tautomerization of p-iminoquinone to o-diiminoquinone and a C-N bond cleavage of 2,5-bis(p-tolylamino)-4-p-tolyliminobenzoquinone leading to the conversion of catechol to a p-benzoquinone derivative are reported.
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Affiliation(s)
- Pinaki Saha
- Department of Chemistry, R. K. Mission Residential College, Narendrapur, Kolkata-103, India.
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22
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Ghisolfi A, Waldvogel A, Routaboul L, Braunstein P. Reversible Switching of the Coordination Modes of a Pyridine-Functionalized Quinonoid Zwitterion; Its Di- and Tetranuclear Palladium Complexes. Inorg Chem 2014; 53:5515-26. [DOI: 10.1021/ic500194y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Alessio Ghisolfi
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg , 4 rue Blaise Pascal, F-67081 Strasbourg Cedex, France
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23
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Yuan M, Weisser F, Sarkar B, Garci A, Braunstein P, Routaboul L, Therrien B. Synthesis and Electrochemical Behavior of a Zwitterion-Bridged Metalla-Cage. Organometallics 2014. [DOI: 10.1021/om500155y] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Minghui Yuan
- Institut de Chimie, Université de Neuchâtel, 51 Avenue de Bellevaux, CH-2000 Neuchâtel, Switzerland
- Laboratoire de Chimie
de Coordination, Institut
de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue
Blaise Pascal, F-67081 Strasbourg Cédex, France
| | - Fritz Weisser
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße 34-36, D-14195 Berlin, Germany
| | - Amine Garci
- Institut de Chimie, Université de Neuchâtel, 51 Avenue de Bellevaux, CH-2000 Neuchâtel, Switzerland
| | - Pierre Braunstein
- Laboratoire de Chimie
de Coordination, Institut
de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue
Blaise Pascal, F-67081 Strasbourg Cédex, France
| | - Lucie Routaboul
- Laboratoire de Chimie
de Coordination, Institut
de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue
Blaise Pascal, F-67081 Strasbourg Cédex, France
| | - Bruno Therrien
- Institut de Chimie, Université de Neuchâtel, 51 Avenue de Bellevaux, CH-2000 Neuchâtel, Switzerland
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24
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Deibel N, Sommer MG, Hohloch S, Schwann J, Schweinfurth D, Ehret F, Sarkar B. Dinuclear Quinonoid-Bridged d8 Metal Complexes with Redox-Active Azobenzene Stoppers: Electrochemical Properties and Electrochromic Behavior. Organometallics 2014. [DOI: 10.1021/om500035c] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Naina Deibel
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Michael G. Sommer
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Stephan Hohloch
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Johannes Schwann
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - David Schweinfurth
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Fabian Ehret
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Biprajit Sarkar
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
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25
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Das HS, Schweinfurth D, Fiedler J, Khusniyarov MM, Mobin SM, Sarkar B. Tuning the Electronic Properties in Ruthenium-Quinone Complexes through Metal Coordination and Substitution at the Bridge. Chemistry 2014; 20:4334-46. [DOI: 10.1002/chem.201204379] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2012] [Revised: 01/08/2014] [Indexed: 11/06/2022]
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26
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Schweinfurth D, Rechkemmer Y, Hohloch S, Deibel N, Peremykin I, Fiedler J, Marx R, Neugebauer P, van Slageren J, Sarkar B. Redox-Induced Spin-State Switching and Mixed Valency in Quinonoid-Bridged Dicobalt Complexes. Chemistry 2014; 20:3475-86. [DOI: 10.1002/chem.201302858] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Revised: 12/07/2013] [Indexed: 11/09/2022]
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27
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Deibel N, Hohloch S, Sommer MG, Schweinfurth D, Ehret F, Braunstein P, Sarkar B. Electrochromic Platinum(II) Complexes Derived from Azobenzene and Zwitterionic Quinonoid Ligands: Electronic and Geometric Structures. Organometallics 2013. [DOI: 10.1021/om4009179] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Naina Deibel
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Stephan Hohloch
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Michael G. Sommer
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - David Schweinfurth
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Fabian Ehret
- Institut für
Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, D-70569 Stuttgart, Germany
| | - Pierre Braunstein
- Laboratoire de Chimie
de Coordination, Institut
de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue
Blaise Pascal, 67081 Strasbourg Cedex, France
| | - Biprajit Sarkar
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
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28
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Schweinfurth D, Büttner N, Hohloch S, Deibel N, Klein J, Sarkar B. Heterobimetallic Cu–dppf (dppf = 1,1′-Bis(diphenylphosphino)ferrocene) Complexes with “Click” Derived Ligands: A Combined Structural, Electrochemical, Spectroelectrochemical, and Theoretical Study. Organometallics 2013. [DOI: 10.1021/om400429f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- David Schweinfurth
- Institut für Chemie und
Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin, Germany
| | - Nadin Büttner
- Institut für Chemie und
Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin, Germany
| | - Stephan Hohloch
- Institut für Chemie und
Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin, Germany
| | - Naina Deibel
- Institut für Anorganische
Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569,
Stuttgart, Germany
| | - Johannes Klein
- Institut für Anorganische
Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569,
Stuttgart, Germany
| | - Biprajit Sarkar
- Institut für Chemie und
Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195, Berlin, Germany
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29
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Sommer MG, Schweinfurth D, Weisser F, Hohloch S, Sarkar B. Substituent-Induced Reactivity in Quinonoid-Bridged Dinuclear Complexes: Comparison between the Ruthenium and Osmium Systems. Organometallics 2013. [DOI: 10.1021/om300939x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Michael G. Sommer
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569
Stuttgart, Germany
| | - David Schweinfurth
- Institut für Chemie und Biochemie, Anorganische Chemie, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Fritz Weisser
- Institut für Chemie und Biochemie, Anorganische Chemie, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Stephan Hohloch
- Institut für Chemie und Biochemie, Anorganische Chemie, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische Chemie, Fabeckstraße
34-36, D-14195 Berlin, Germany
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30
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Cationic and Neutral (Ar-BIAN)Copper(I) Complexes Containing Phosphane and Arsane Ancillary Ligands: Synthesis, Molecular Structure and Catalytic Behaviour in Cycloaddition Reactions of Azides and Alkynes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201211] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Synthesis, characterization and properties of copper(I) complexes with bis(diphenylphosphino)-ferrocene ancillary ligand. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.03.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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32
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Liu X, Zhang S, Ding Y. Synthesis, crystal structures and reactivity of copper(I) amidate complexes with aryl halides: insight into copper(I)-catalyzed Goldberg reaction. Dalton Trans 2012; 41:5897-902. [PMID: 22460430 DOI: 10.1039/c2dt00050d] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this paper, copper(I) amidate complexes (2-3), proposed intermediates in copper-catalyzed Goldberg reaction, have been prepared and characterized by elemental analysis, IR, (1)H NMR and X-ray crystallography. Ancillary ligand bis(diphenylphosphino)ferrocene (dppf) has contributed greatly to the stability of the copper-amidate complexes due to its strong chelating ability and weak intermolecular interactions. Thermal gravimetric analyses are carried out to determine the thermal competency of complexes 2-3 as the intermediates of the high-temperature Goldberg reactions. Reaction of complexes 2 and 3 with aryl halides generates the N-arylation products 5-8, accompanied by the formation of a copper(I) complex Cu(dppf)X (X = I or Br) 4, which has been determined by LC-MS analysis. These results provide new evidence for the mechanism of copper(I)-catalyzed Goldberg reaction.
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Affiliation(s)
- Xinfang Liu
- The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, P.R. China
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33
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Su Y, Zhao Y, Gao J, Dong Q, Wu B, Yang XJ. Alkali Metal and Zinc Complexes of a Bridging 2,5-Diamino-1,4-Benzoquinonediimine Ligand. Inorg Chem 2012; 51:5889-96. [DOI: 10.1021/ic3004867] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yuanting Su
- State Key Laboratory for Oxo Synthesis & Selective Oxidation, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, China
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34
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Two Novel Heterothiometallic Clusters Modified by 1,1′-Bis(diphenylphosphino) ferrocene (dppf) in Quasi-Closed Bridging Mode: Syntheses, Structures and Properties. J CLUST SCI 2012. [DOI: 10.1007/s10876-012-0467-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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35
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Liu X, Zhang S, Ding Y. Synthesis, characterization and properties of a μ–η2:η2-carbonato-bridged bis(phosphinoferrocenyl) copper(I) complex from CO2 fixation. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.01.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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36
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Hohloch S, Braunstein P, Sarkar B. Ruthenium Hydride Complexes with Zwitterionic Quinonoid Ligands - Isomer Separation, Structural Properties, Electrochemistry, and Catalysis. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201101091] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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37
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Kauf T, Braunstein P. Reactivity of TCNE or TCNQ Derivatives of Quinonoid Zwitterions: Platinum-Induced HCN Elimination vs Oxidative-Addition. Inorg Chem 2011; 50:11472-80. [DOI: 10.1021/ic2013045] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas Kauf
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4, rue Blaise Pascal, CS 90032, F-67081 Strasbourg Cedex, France
| | - Pierre Braunstein
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4, rue Blaise Pascal, CS 90032, F-67081 Strasbourg Cedex, France
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38
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Synthesis, characterization, crystal structures and photophysical properties of copper(I) complexes containing 1,1′-bis(diphenylphosphino)ferrocene (B-dppf) in doubly-bridged mode. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.07.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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39
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Deibel N, Schweinfurth D, Fiedler J, Záliš S, Sarkar B. Isomeric separation in donor-acceptor systems of Pd(II) and Pt(II) and a combined structural, electrochemical and spectroelectrochemical study. Dalton Trans 2011; 40:9925-34. [PMID: 21879087 DOI: 10.1039/c1dt10856e] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Compounds of the form [(pap)M(Q(2-))] (pap = phenylazopyridine; Q = 3,5-di-tert-butyl-benzoquinone, M = Pd, 1a and 1b, M = Pt, 2a and 2b; Q = 4-tert-butyl-benzoquinone, M = Pd, 3a and 3b; M = Pt, 4a and 4b) were synthesized in a one-pot reaction. The geometrical isomers, which are possible because of the built in asymmetry of these ligands, have been separated by using different temperatures and variable solubility. Structural characterization of 1b shows that the metal centers are in a square planar environment, the pap ligand is in the unreduced neutral state and the quinones are in the doubly reduced, Q(2-) catecholate form. Cyclic voltammetric measurements on the complexes display two one-electron oxidations and two one-electron reductions. EPR and vis-NIR spectra of the one-electron oxidized forms of the complexes indicate that the first oxidation takes place on the Q(2-) ligands to produce a metal bound semiquinone (Q˙(-)) radical. Reduction takes place on the pap ligand, generating metal bound pap˙(-) as seen from the (14)N (I = 1) coupling in their EPR spectrum. All the complexes in their [(pap)M(Q(2-))] neutral forms show strong absorptions in the NIR region which are largely LLCT (ligand to ligand charge transfer) in origin. These NIR bands can be tuned over a wide energy range by varying the metal center as well as the Q ligand. In addition, the intensity of NIR bands can be switched on and off by a simple electron transfer at relatively low potentials. DFT studies were used to corroborate these findings.
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Affiliation(s)
- Naina Deibel
- Institut für Anorganische Chemie, Universität Stuttgart, Germany
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40
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Štěpnička P, Císařová I, Schulz J. Coordination and Catalytic Properties of a Semihomologous Dppf Congener, 1-(Diphenylphosphino)-1′-[(diphenylphosphino)methyl]ferrocene. Organometallics 2011. [DOI: 10.1021/om2004805] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Petr Štěpnička
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Jiří Schulz
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
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41
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Nawn G, Waldie KM, Oakley SR, Peters BD, Mandel D, Patrick BO, McDonald R, Hicks RG. Redox-active bridging ligands based on indigo diimine ("Nindigo") derivatives. Inorg Chem 2011; 50:9826-37. [PMID: 21688798 DOI: 10.1021/ic200388y] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Reactions of indigo with a variety of substituted anilines produce the corresponding indigo diimines ("Nindigos") in good yields. Nindigo coordination complexes are subsequently prepared by reactions of the Nindigo ligands with Pd(hfac)(2). In most cases, binuclear complexes are obtained in which the deprotonated Nindigo bridges two Pd(hfac) moieties in the expected bis-bidentate binding mode. When the Nindigo possesses bulky substituents on the imine (mesityl, 2,6-dimethylphenyl, 2,6-diisopropylphenyl, etc.), mononuclear Pf(hfac) complexes are obtained in which the Nindigo core has isomerized from a trans- to a cis-alkene; in these structures, the palladium is bound to the cis-Nindigo ligand at the two indole nitrogen atoms; the remaining proton is bound between the imine nitrogen atoms. The palladium complexes possess intense electronic absorption bands [near 920 nm for the binuclear complexes and 820 nm for the mononuclear cis-Nindigo complexes; extinction coefficients are (1.0-2.0) × 10(4) M(-1) cm(-1)] that are ligand-centered (π-π*) transitions. Cyclic voltammetry investigations reveal multiple redox events that are also ligand-centered in origin. All of the palladium complexes can be reversibly oxidized in two sequential one-electron steps; the binuclear complexes are reduced in a two-electron process whose reversibility depends on the Nindigo ligand substituent; the mononuclear palladium species show two one-electron reductions, only the first of which is quasi-reversible.
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Affiliation(s)
- Graeme Nawn
- Department of Chemistry, University of Victoria, P.O. Box 3065 STN CSC, Victoria, British Columbia V8W 3V6, Canada
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42
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Paretzki A, Das HS, Weisser F, Scherer T, Bubrin D, Fiedler J, Nycz JE, Sarkar B. Invariant Oxidation State of Copper but not of Ruthenium in Complexes with Noninnocent N-(2-Methyl-5,8-dioxo-5,8-dihydroquinolin-7-yl)acetamide: A Combined Structural, Electrochemical and Spectroelectrochemical Investigation. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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43
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Weisser F, Huebner R, Schweinfurth D, Sarkar B. Energy-Level Tailoring in a Series of Redox-Rich Quinonoid-Bridged Diruthenium Complexes Containing Tris(2-pyridylmethyl)amine as a Co-Ligand. Chemistry 2011; 17:5727-36. [DOI: 10.1002/chem.201003253] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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44
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Schweinfurth D, Das HS, Weisser F, Bubrin D, Sarkar B. One-Pot Synthesis of Symmetric and Asymmetric p-Quinone Ligands and Unprecedented Substituent Induced Reactivity in Their Dinuclear Ruthenium Complexes. Inorg Chem 2011; 50:1150-9. [DOI: 10.1021/ic101972u] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David Schweinfurth
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Hari Sankar Das
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Fritz Weisser
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Denis Bubrin
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
| | - Biprajit Sarkar
- Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
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45
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Deibel N, Schweinfurth D, Huebner R, Braunstein P, Sarkar B. ‘Double redox-activity’ in azobenzene-quinonoid palladium(ii) complexes: a combined structural, electrochemical and spectroscopic study. Dalton Trans 2011; 40:431-6. [DOI: 10.1039/c0dt00944j] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Kauf T, Braunstein P. Contrasting behaviour of TCNE and TCNQ zwitterionic benzoquinonemonoimine derivatives and coordination of a tricyanoethenyl substituent to Pd(0). Dalton Trans 2011; 40:9967-70. [DOI: 10.1039/c1dt10804b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Barry N, Furrer J, Therrien B. In- and Out-of-Cavity Interactions by Modulating the Size of Ruthenium Metallarectangles. Helv Chim Acta 2010. [DOI: 10.1002/hlca.200900422] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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48
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Paretzki A, Pattacini R, Huebner R, Braunstein P, Sarkar B. Stabilising a quinonoid-bridged dicopper(i) complex by use of a dppf (dppf = (diphenylphosphino)ferrocene) backbone. Chem Commun (Camb) 2010; 46:1497-9. [DOI: 10.1039/b921731b] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Nishinaga T, Aono T, Isomura E, Watanabe S, Miyake Y, Miyazaki A, Enoki T, Miyasaka H, Otani H, Iyoda M. Structural, electronic and magnetic properties of Cu(ii) complexes of 2-substituted tropones bearing a ferrocenyl group at 5-position. Dalton Trans 2010; 39:2293-300. [PMID: 20162203 DOI: 10.1039/b912255a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Tohru Nishinaga
- Department of Chemistry, Graduate School of Science and Engineering, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan.
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50
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Tamboura FB, Cazin CSJ, Pattacini R, Braunstein P. Reactions of Amines with Zwitterionic Quinoneimines: Synthesis of New Anionic and Zwitterionic Quinonoids. European J Org Chem 2009. [DOI: 10.1002/ejoc.200900154] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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