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Waniek SD, Förster C, Heinze K. Protic Ferrocenyl Acyclic Diamino Carbene Gold(I) Complexes. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sven D. Waniek
- Department of Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Christoph Förster
- Department of Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Katja Heinze
- Department of Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10–14 55128 Mainz Germany
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2
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Veit P, Seibert S, Förster C, Heinze K. Unexpected C–C Bond Formation with a Ferrocenyl Fischer Carbene Complex. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.201900350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Philipp Veit
- Department of Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Sebastian Seibert
- Department of Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Christoph Förster
- Department of Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Katja Heinze
- Department of Chemistry Johannes Gutenberg University of Mainz Duesbergweg 10–14 55128 Mainz Germany
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3
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Smolyaninov IV, Poddel’sky AI, Smolyaninova SA, Arsenyev MV, Fukin GK, Berberova NT. Polyfunctional Sterically Hindered Catechols with Additional Phenolic Group and Their Triphenylantimony(V) Catecholates: Synthesis, Structure, and Redox Properties. Molecules 2020; 25:molecules25081770. [PMID: 32290617 PMCID: PMC7221534 DOI: 10.3390/molecules25081770] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/09/2020] [Accepted: 04/10/2020] [Indexed: 01/25/2023] Open
Abstract
New polyfunctional sterically hindered 3,5-di-tert-butylcatechols with an additional phenolic group in the sixth position connected by a bridging sulfur atom—(6-(CH2-S-tBu2Phenol)-3,5-DBCat)H2 (L1), (6-(S-tBu2Phenol)-3,5-DBCat)H2 (L2), and (6-(S-Phenol)-3,5-DBCat)H2 (L3) (3,5-DBCat is dianion 3,5-di-tert-butylcatecolate)—were synthesized and characterized in detail. The exchange reaction between catechols L1 and L3 with triphenylantimony(V) dibromide in the presence of triethylamine leads to the corresponding triphenylantimony(V) catecholates (6-(CH2-S-tBu2Phenol)-3,5-DBCat)SbPh3 (1) and (6-(S-Phenol)-3,5-DBCat)SbPh3 (2). The electrochemical properties of catechols L1–L3 and catecholates 1 and 2 were investigated using cyclic voltammetry. The electrochemical oxidation of L1–L3 at the first stage proceeds with the formation of the corresponding o-benzoquinones. The second process is the oxidation of the phenolic moiety. Complexes 1 and 2 significantly expand their redox capabilities, owing to the fact that they can act as the electron donors due to the catecholate metallocycle capable of sequential oxidations, and as donors of the hydrogen atoms, thus forming a stable phenoxyl radical. The molecular structures of the free ligand L1 and complex 1 in the crystal state were determined by single-crystal X-ray analysis.
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Affiliation(s)
- Ivan V. Smolyaninov
- Toxicology Research Group, Federal State Budgetary Institution of Science “Federal Research Centre The Southern Scientific Centre of the Russian Academy of The Sciences”, Tatischeva str. 16, 414056 Astrakhan, Russia;
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia; (S.A.S.); (N.T.B.)
| | - Andrey I. Poddel’sky
- G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina str., 603137 Nizhny Novgorod, Russia; (M.V.A.); (G.K.F.)
- Correspondence: ; Tel./Fax: +7-831-462-7497
| | - Susanna A. Smolyaninova
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia; (S.A.S.); (N.T.B.)
| | - Maxim V. Arsenyev
- G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina str., 603137 Nizhny Novgorod, Russia; (M.V.A.); (G.K.F.)
| | - Georgy K. Fukin
- G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina str., 603137 Nizhny Novgorod, Russia; (M.V.A.); (G.K.F.)
| | - Nadezhda T. Berberova
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia; (S.A.S.); (N.T.B.)
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4
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Smolyaninov IV, Pitikova OV, Korchagina EO, Poddel'sky AI, Fukin GK, Luzhnova SA, Tichkomirov AM, Ponomareva EN, Berberova NT. Catechol thioethers with physiologically active fragments: Electrochemistry, antioxidant and cryoprotective activities. Bioorg Chem 2019; 89:103003. [PMID: 31132599 DOI: 10.1016/j.bioorg.2019.103003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 05/15/2019] [Accepted: 05/19/2019] [Indexed: 12/16/2022]
Abstract
A number of asymmetrical thioethers based on 3,5-di-tert-butylcatechol containing sulfur atom bonding with physiologically active groups in the sixth position of aromatic ring have been synthesized and the electrochemical properties, antioxidant, cryoprotective activities of new thioethers have been evaluated. Cyclic voltammetry was used to estimate the oxidation potentials of thioethers in acetonitrile. The electrooxidation of compounds at the first stage leads to the formation of o-benzoquinones. The antioxidant activities of the compounds were determined using 2,2'-diphenyl-1-picrylhydrazyl radical (DPPH) assay, experiments on the oxidative damage of the DNA, the reaction of 2,2'-azobis(2-amidinopropane hydrochloride) (AAPH) induced glutathione depletion (GSH), the process of lipid peroxidation of rat liver (Wistar) homogenates in vitro, and iron(II) chelation test. Compounds 1-9 have greater antioxidant effectiveness than 3,5-di-tert-butylcatechol (CatH2) in all assays. The variation of physiologically active groups at sulfur atom allows to regulate lipophilic properties and antioxidant activity of compounds. Thioethers 3, 4 and 7 demonstrate the combination of radical scavenging, antioxidant activity and iron(II) binding properties. The researched compounds 1-9 were studied as possible cryoprotectants of the media for cryopreservation of the Russian sturgeon sperm. Novel cryoprotective additives in cryomedium reduce significantly the content of membrane-permeating agent (DMSO). A cryoprotective effect of an addition of the catechol thioethers depends on the structure of groups at sulfur atom. The cryoprotective properties of compounds 3, 4 and 7 are caused by combination of catechol fragment, bonded by a thioether linker with a long hydrocarbon chain and a terminal ionizable group or with a biologically relevant acetylcysteine residue.
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Affiliation(s)
- Ivan V Smolyaninov
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia; Toxicology Research Group of Southern Scientific Centre of Russian Academy of Science, 41 Chekhova str., Rostov-on-Don 344006, Russia.
| | - Olga V Pitikova
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia
| | - Eugenia O Korchagina
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia
| | - Andrey I Poddel'sky
- G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina str., 603137 Nizhny Novgorod, Russia
| | - Georgy K Fukin
- G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina str., 603137 Nizhny Novgorod, Russia
| | - Svetlana A Luzhnova
- Department of Microbiology and Immunology, Pyatigorsk Medicinal and Pharmaceutical Institute, 11 Kalinina str., Pyatigorsk 357500, Russia
| | - Andrey M Tichkomirov
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia
| | - Elena N Ponomareva
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia; Toxicology Research Group of Southern Scientific Centre of Russian Academy of Science, 41 Chekhova str., Rostov-on-Don 344006, Russia
| | - Nadezhda T Berberova
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia
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5
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Veit P, Volkert C, Förster C, Ksenofontov V, Schlicher S, Bauer M, Heinze K. Gold(ii) in redox-switchable gold(i) catalysis. Chem Commun (Camb) 2019; 55:4615-4618. [PMID: 30860529 DOI: 10.1039/c9cc00283a] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Gold(ii) species catalyse the cyclisation of N(2-propyn-1-yl)benzamide to 2-phenyl-5-vinylidene-2-oxazoline without halide abstraction while the saturated gold(i) complex is inactive. Redox-switching between gold(ii) and gold(i) turns catalytic turnover on and off.
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Affiliation(s)
- Philipp Veit
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany.
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6
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Tahara K, Kadowaki T, Kikuchi JI, Ozawa Y, Yoshimoto S, Abe M. Synthesis and Characterization of a New Series of Binuclear Pd(II) Biscatecholato Complexes: Non-Innocent Ligand-Based Approach to a Wide Range of Variation in Near-Infrared Absorptions of Mixed-Valence Complexes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20180187] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Keishiro Tahara
- Department of Material Science and Research Center for New Functional Materials, Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
| | - Tomoya Kadowaki
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Jun-ichi Kikuchi
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Yoshiki Ozawa
- Department of Material Science and Research Center for New Functional Materials, Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
| | - Soichiro Yoshimoto
- Faculty of Advanced Science and Technology, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-8555, Japan
| | - Masaaki Abe
- Department of Material Science and Research Center for New Functional Materials, Graduate School of Material Science, University of Hyogo, 3-2-1 Kouto, Kamigori, Ako, Hyogo 678-1297, Japan
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7
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Hanauer K, Förster C, Heinze K. Redox-Controlled Stabilization of an Open-Shell Intermediate in a Bioinspired Enzyme Model. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800570] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kristina Hanauer
- Institute of Inorganic Chemistry and Analytical Chemistry; Johannes Gutenberg University of Mainz; Duesbergweg 10-14 55128 Mainz Germany
| | - Christoph Förster
- Institute of Inorganic Chemistry and Analytical Chemistry; Johannes Gutenberg University of Mainz; Duesbergweg 10-14 55128 Mainz Germany
| | - Katja Heinze
- Institute of Inorganic Chemistry and Analytical Chemistry; Johannes Gutenberg University of Mainz; Duesbergweg 10-14 55128 Mainz Germany
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8
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Waniek SD, Klett J, Förster C, Heinze K. Polysubstituted ferrocenes as tunable redox mediators. Beilstein J Org Chem 2018; 14:1004-1015. [PMID: 29977372 PMCID: PMC6009500 DOI: 10.3762/bjoc.14.86] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 04/19/2018] [Indexed: 01/13/2023] Open
Abstract
A series of four ferrocenyl ester compounds, 1-methoxycarbonyl- (1), 1,1’-bis(methoxycarbonyl)- (2), 1,1’,3-tris(methoxycarbonyl)- (3) and 1,1’,3,3’-tetrakis(methoxycarbonyl)ferrocene (4), has been studied with respect to their potential use as redox mediators. The impact of the number and position of ester groups present in 1–4 on the electrochemical potential E1/2 is correlated with the sum of Hammett constants. The 1/1+–4/4+ redox couples are chemically stable under the conditions of electrolysis as demonstrated by IR and UV–vis spectroelectrochemical methods. The energies of the C=O stretching vibrations of the ester moieties and the energies of the UV–vis absorptions of 1–4 and 1+–4+ correlate with the number of ester groups. Paramagnetic 1H NMR redox titration experiments give access to the chemical shifts of 1+–4+ and underline the fast electron self-exchange of the ferrocene/ferrocenium redox couples, required for rapid redox mediation in organic electrosynthesis.
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Affiliation(s)
- Sven D Waniek
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Jan Klett
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Christoph Förster
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Katja Heinze
- Institute of Inorganic Chemistry and Analytical Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
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9
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Lauck M, Förster C, Heinze K. N-Cobaltocenium Amide as Reactive Nucleophilic Reagent for Donor–Acceptor Bimetallocenes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00790] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Maximilian Lauck
- Institute of Inorganic Chemistry and
Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Christoph Förster
- Institute of Inorganic Chemistry and
Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Katja Heinze
- Institute of Inorganic Chemistry and
Analytical Chemistry, Johannes Gutenberg University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
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10
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Smolyaninov I, Poddel'sky A, Baryshnikova S, Kuzmin V, Korchagina E, Arsenyev M, Smolyaninova S, Berberova N. Electrochemical transformations and evaluation of antioxidant activity of some Schiff bases containing ferrocenyl and (thio‐)phenol, catechol fragments. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.4121] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- I.V. Smolyaninov
- Department of ChemistryAstrakhan State Technical University 16 Tatisheva str Astrakhan 414056 Russia
- Toxicology research group of Southern Scientific Centre of Russian Academy of Science 41 Chekhova str Rostov‐on‐Don 344006 Russia
| | - A.I. Poddel'sky
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences 49 Tropinina str 603137 Nizhny Novgorod Russia
| | - S.V. Baryshnikova
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences 49 Tropinina str 603137 Nizhny Novgorod Russia
| | - V.V. Kuzmin
- Department of ChemistryAstrakhan State Technical University 16 Tatisheva str Astrakhan 414056 Russia
| | - E.O. Korchagina
- Department of ChemistryAstrakhan State Technical University 16 Tatisheva str Astrakhan 414056 Russia
| | - M.V. Arsenyev
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences 49 Tropinina str 603137 Nizhny Novgorod Russia
| | - S.A. Smolyaninova
- Department of ChemistryAstrakhan State Technical University 16 Tatisheva str Astrakhan 414056 Russia
| | - N.T. Berberova
- Department of ChemistryAstrakhan State Technical University 16 Tatisheva str Astrakhan 414056 Russia
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11
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Sethi S, Das PK, Behera N. The chemistry of aminoferrocene, Fe{(η5-C5H4NH2)(η5-Cp)}: Synthesis, reactivity and applications. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.10.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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12
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Hanauer K, Pham MT, Förster C, Heinze K. Solution Conformation and Self‐Assembly of Ferrocenyl(thio)ureas. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600918] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kristina Hanauer
- Institute of Inorganic Chemistry and Analytical Chemistry Johannes Gutenberg University Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Minh Thu Pham
- Institute of Inorganic Chemistry and Analytical Chemistry Johannes Gutenberg University Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Christoph Förster
- Institute of Inorganic Chemistry and Analytical Chemistry Johannes Gutenberg University Mainz Duesbergweg 10–14 55128 Mainz Germany
| | - Katja Heinze
- Institute of Inorganic Chemistry and Analytical Chemistry Johannes Gutenberg University Mainz Duesbergweg 10–14 55128 Mainz Germany
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13
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Kienz T, Förster C, Heinze K. Generation and Oligomerization of N-Ferrocenyl Ketenimines via Open-Shell Intermediates. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00619] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Torben Kienz
- Institute of Inorganic Chemistry
and Analytical Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Christoph Förster
- Institute of Inorganic Chemistry
and Analytical Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Katja Heinze
- Institute of Inorganic Chemistry
and Analytical Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, D-55128 Mainz, Germany
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14
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Neidlinger A, Förster C, Heinze K. Conformational Switching of Multi-Responsive Ferrocenyl-Phenol Conjugates. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600774] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Andreas Neidlinger
- Institute of Inorganic and Analytical Chemistry; Johannes-Gutenberg-University; Duesbergweg 10-14 55128 Mainz Germany
| | - Christoph Förster
- Institute of Inorganic and Analytical Chemistry; Johannes-Gutenberg-University; Duesbergweg 10-14 55128 Mainz Germany
| | - Katja Heinze
- Institute of Inorganic and Analytical Chemistry; Johannes-Gutenberg-University; Duesbergweg 10-14 55128 Mainz Germany
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15
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Tahara K, Akehi S, Kadowaki T, Kikuchi JI. Synthesis and Electrochemistry of a Ferrocene Conjugate of a Pd(II) Diimine Catecholate Complex and Its Charge-Transfer Properties in the One-Electron-Oxidized Form. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160109] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Neidlinger A, Förster C, Heinze K. How Hydrogen Bonds Affect Reactivity and Intervalence Charge Transfer in Ferrocenium-Phenolate Radicals. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201501471] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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17
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Veit P, Prantl E, Förster C, Heinze K. Competitive NH···Ru/Fe Hydrogen Bonding in Ferrocenyl Ruthenocenyl Tosyl Hydrazone. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b00963] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Philipp Veit
- Institute of Inorganic Chemistry
and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg
10-14, 55128 Mainz, Germany
| | - Ephraim Prantl
- Institute of Inorganic Chemistry
and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg
10-14, 55128 Mainz, Germany
| | - Christoph Förster
- Institute of Inorganic Chemistry
and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg
10-14, 55128 Mainz, Germany
| | - Katja Heinze
- Institute of Inorganic Chemistry
and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg
10-14, 55128 Mainz, Germany
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Neidlinger A, Kienz T, Heinze K. Spin Trapping of Carbon-Centered Ferrocenyl Radicals with Nitrosobenzene. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00778] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andreas Neidlinger
- Institute of Inorganic and
Analytical Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Torben Kienz
- Institute of Inorganic and
Analytical Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Katja Heinze
- Institute of Inorganic and
Analytical Chemistry, Johannes Gutenberg-University, Duesbergweg 10-14, D-55128 Mainz, Germany
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Tahara K, Akehi S, Akita T, Katao S, Kikuchi JI, Tokunaga K. Tuning of intramolecular charge transfer properties and charge distributions in ferrocene-appended catechol derivatives by chemical substitution. Dalton Trans 2015. [PMID: 26212616 DOI: 10.1039/c5dt01998b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
In this study, we report intramolecular charge transfer (ICT) properties and charge distributions in a series of FcC derivatives (FcC = 4-ferrocenylcatecholate where Fc = ferrocene and C = catecholate). This series consists of a previously reported complex FcV (4-ferrocenylveratrole) and newly synthesized complexes FcA (4-ferrocenylcatechol bis(acetate) and Pt((t)Bu2bpy)(FcC) ((t)Bu2bpy = 4,4'-di-tert-butyl-2,2'-dipyridyl). An electrochemical analysis of Pt((t)Bu2bpy)(FcC) using cyclic voltammetry revealed two well-defined, reversible waves which were assigned to the sequential oxidation of the Pt((t)Bu2bpy)(C) and Fc moieties. The potential splitting between the waves (524 mV) indicated that there was an electronic interaction between both moieties. ICT property and charge distribution of [Pt((t)Bu2bpy)(FcC)]˙(+) were rationalized by comparison with the [FcV]˙(+) and [FcA]˙(+) (4-ferrocenylcatechol bis(acetate)). DFT calculations and UV-vis-NIR spectroscopy revealed that [Pt((t)Bu2bpy)(FcC)]˙(+), [FcV]˙(+), and [FcA]˙(+) were ferrocenium (Fc(+))-centered rather than semiquinone ligand-centered and that these complexes exhibited ICT transition bands from the catechol-derivatized framework to the Fc(+) moiety in the near infrared (NIR) region. Both the electronic coupling parameter (HAB) and delocalization parameter (α) increased in value as the electron-donating strength of the substituent groups in the catechol-derivatized framework increased (OCOCH3 ([FcA]˙(+)) < OCH3 ([FcV]˙(+)) < O(-) ([Pt((t)Bu2bpy)(FcC)]˙(+))). The electronic interactions between the organometallic center and the non-innocent framework were tuned by changing the substituents. The potential energy surfaces of the Fc(+) derivatives, obtained using two-state Marcus-Hush theory, can be modulated by changing the energy level of the molecular orbitals of the appended catechol-derivatized moieties.
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Affiliation(s)
- Keishiro Tahara
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5, Takayama, Ikoma 6300192, Japan
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Petrov AR, Derheim A, Oetzel J, Leibold M, Bruhn C, Scheerer S, Oßwald S, Winter RF, Siemeling U. A Stable Planar-Chiral N-Heterocyclic Carbene with a 1,1'-Ferrocenediyl Backbone. Inorg Chem 2015; 54:6657-70. [PMID: 26098133 DOI: 10.1021/acs.inorgchem.5b01064] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This paper focuses on the stable, ferrocene-based N-heterocyclic carbene (NHC) rac-[Fe{(η(5)-t-BuC5H3)NpN}2C:] (A'-Np, Np = neopentyl), which is planar-chiral due to the two tert-butyl substituents in 3,3'-positions. A'-Np was synthesized in nine steps starting from 1,1'-di-tert-butylferrocene (1), the first step being its 3,3'-dilithiation to afford rac-[Fe(η(5)-t-BuC5H3Li)2] (rac-fc'Li2, 2). The structures of rac-fc'(SiMe3)2 (3), rac-fc'Br2 (4), rac-fc'(N3)2 (5), and the immediate carbene precursor [A'-NpH]BF4 were determined by single-crystal X-ray diffraction (XRD). The chemical properties of A'-Np were found to be very similar to those of its tert-butyl-free congener A-Np, both being ambiphilic NHCs with rather high calculated HOMO energies (ca. -4.0 eV) and low singlet-triplet gaps (ca. 35 kcal/mol). A Tolman electronic parameter value of 2050 cm(-1) was derived from IR data of cis-[RhCl(A'-Np)(CO)2], indicating the high donicity of A'-Np as a ligand. Consistent with its ambiphilic nature, A'-Np was found to react readily with carbon monoxide, affording the betainic enolate (A'-Np)2CO as four stereoisomers, viz. (RpRp-A'-Np)═C(O(-))(RpRp-A'-Np(+)), (SpSp-A'-Np)═C(O(-))(SpSp-A'-Np(+)), (RpRp-A'-Np)═C(O(-))(SpSp-A'-Np(+)), and (SpSp-A'-Np)═C(O(-))(RpRp-A'-Np(+)). The former two isomers were structurally characterized as a racemic compound by single-crystal XRD. A'-Np was found to react swiftly with dichloromethane, affording the addition product A'-NpH-CHCl2 in a reaction that is unprecedented for diaminocarbenes. A-NpH-CHCl2 was obtained analogously. Both compounds were structurally characterized by single-crystal XRD. An electrochemical investigation of A'-Np by cyclic and square wave voltammetry revealed a reversible oxidation of the carbene at a half-wave potential of -0.310 vs ferrocene/ferrocenium (THF/NBu4PF6). The electrochemical data previously published for A-Np were identified to be incorrect, since unnoticed hydrolysis of the NHC had taken place, affording A-Np(H2O). The hydrolysis products of A-Np and A'-Np were found to be reversibly oxidized at half-wave potentials of -0.418 and -0.437 V, respectively.
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Affiliation(s)
- Alex R Petrov
- †Institute of Chemistry, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Anatoli Derheim
- †Institute of Chemistry, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Jan Oetzel
- †Institute of Chemistry, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Michael Leibold
- †Institute of Chemistry, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Clemens Bruhn
- †Institute of Chemistry, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Stefan Scheerer
- ‡Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany
| | - Steffen Oßwald
- ‡Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany
| | - Rainer F Winter
- ‡Fachbereich Chemie, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany
| | - Ulrich Siemeling
- †Institute of Chemistry, University of Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
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Kreitner C, Grabolle M, Resch-Genger U, Heinze K. Dual Emission and Excited-State Mixed-Valence in a Quasi-Symmetric Dinuclear Ru–Ru Complex. Inorg Chem 2014; 53:12947-61. [DOI: 10.1021/ic5020362] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christoph Kreitner
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University
of Mainz, Duesbergweg 10–14, 55128 Mainz, Germany
- Graduate School Materials Science in Mainz, Staudingerweg
9, 55128 Mainz, Germany
| | - Markus Grabolle
- Federal Institute for Materials Research and Testing (BAM), Division 1.5, Richard-Willstätter-Str.
11, 12489 Berlin, Germany
| | - Ute Resch-Genger
- Federal Institute for Materials Research and Testing (BAM), Division 1.5, Richard-Willstätter-Str.
11, 12489 Berlin, Germany
| | - Katja Heinze
- Institute of Inorganic and Analytical Chemistry, Johannes Gutenberg-University
of Mainz, Duesbergweg 10–14, 55128 Mainz, Germany
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Leusmann E, Wagner M, Rosemann NW, Chatterjee S, Dehnen S. Synthesis, crystal structure, and photoluminescence studies of a ruthenocenyl-decorated Sn/S cluster. Inorg Chem 2014; 53:4228-33. [PMID: 24716534 DOI: 10.1021/ic500367y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Recently, we reported on ferrocenyl-decorated Sn/S clusters; herein, we present the extension of our investigations by attachment of ruthenocenyl units to an according cluster skeleton. The latter was realized upon improvement of the synthesis of acetylruthenocene, its conversion to a hydrazone derivative, and the subsequent reaction with a keto-functionalized Sn/S precursor complex. The report comprises the crystal structures of acetylruthenocene and the ruthenocenyl-terminated Sn/S cluster [(R(Rc)Sn)4Sn2S10] (R(Rc) = CMe2CH2C(Me)═N-N═C(Me)Rc), as well as the discussion of the electrochemical properties of the latter and its behavior during time-resolved photoluminescence investigations.
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Affiliation(s)
- Eliza Leusmann
- Fachbereich Chemie and Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg , Hans-Meerwein-Str., D-35043 Marburg, Germany
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Kienz T, Förster C, Heinze K. Impact of O → S Exchange in Ferrocenyl Amides on the Structure and Redox Chemistry. Organometallics 2014. [DOI: 10.1021/om500052k] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Torben Kienz
- Institute
of Inorganic and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Christoph Förster
- Institute
of Inorganic and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Katja Heinze
- Institute
of Inorganic and Analytical Chemistry, Johannes Gutenberg-University of Mainz, Duesbergweg 10-14, 55128 Mainz, Germany
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