1
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Haaf S, Engels E, Kaifer E, Himmel HJ. Hexaguanidino-Triptycenes and Triphenylenes: Electronic Coupling in Molecules Containing Three Redox-Active o-Diguanidinobenzene Units Connected either Directly or Interacting Through Homoconjugation. Chemistry 2024; 30:e202301903. [PMID: 37815019 DOI: 10.1002/chem.202301903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/22/2023] [Accepted: 10/10/2023] [Indexed: 10/11/2023]
Abstract
Novel redox-active hexaguanidine molecules with multiple redox states were synthesized by connecting three o-diguanidinobenzene units. In 2,3,6,7,14,15-hexaguanidino-triptycenes, the three redox-active o-diguanidinobenzene units are connected through C-C bonds to the sp3 -hybridized bridgehead C atoms, and in 2,3,6,7,10,11-hexaguanidino-triphenylenes they are directly connected. The connectivity difference leads to different electronic coupling between the three redox-active o-diguanidinobenzene units, with homoconjugation being present in the triptycene, but not in the triphenylene compounds. Motivated by the appearance of an intense low-energy electronic transition, we especially analysed the effect of homoconjugation on the electronic structure and charge delocalization in the dicationic redox state of the triptycene derivatives. Then, several trinuclear high-spin cobalt (and copper) complexes were synthesized with the triphenylene and triptycene ligands, and the magnetic coupling and redox properties analysed. By choice of the coligands (hexafluoroacetylacetonate, trifluoroacetylacetonate and acetylacetonate), oxidation could be switched between metal- and ligand-centered redox events, leading to drastic changes in the magnetic or optical properties, especially as a consequence of homoconjugation in the triptycene derivatives.
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Affiliation(s)
- Sebastian Haaf
- Inorganic Chemistry, Ruprecht-Karls University Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Eliane Engels
- Inorganic Chemistry, Ruprecht-Karls University Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Elisabeth Kaifer
- Inorganic Chemistry, Ruprecht-Karls University Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Hans-Jörg Himmel
- Inorganic Chemistry, Ruprecht-Karls University Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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2
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Merino-García MDR, Soriano-Agueda LA, Guzmán-Hernández JDD, Martínez-Otero D, Landeros Rivera B, Cortés-Guzmán F, Barquera-Lozada JE, Jancik V. Benzene and Borazine, so Different, yet so Similar: Insight from Experimental Charge Density Analysis. Inorg Chem 2022; 61:6785-6798. [PMID: 35472275 DOI: 10.1021/acs.inorgchem.1c03923] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although benzene and borazine are isoelectronic and isostructural, they have very different electronic structures, mainly due to the polar nature of the B-N bond. Herein, we present an experimental study of the charge density distribution obtained from the multipole model formalism and Hirshfeld atom refinement (HAR) based on high-resolution X-ray diffraction data of borazine B3N3H6 (1) and B,B',B″-trichloroborazine (2) crystals. These data are compared to those obtained from HAR for benzene (4) and 1,3,5-trichlorobenzene (5) and further compared with values obtained from density functional theory calculations in the gas phase, where N,N',N″-trichloroborazine (3) was also included. The results confirm that, unlike benzene, borazines are only weakly aromatic with an island-like electronic delocalization within the B3N3 ring involving only the nitrogen atoms. Furthermore, delocalization indices and interacting quantum atom energy for bonded and non-bonded atoms were found to be highly suitable indicators capable of describing the origin of the discrepancies observed when the degree of aromaticity in 2 and 3 is evaluated using common aromaticity indices. Additionally, analysis of intermolecular interactions in the crystals brings further evidence of a weakly aromatic character of the borazines as it reveals surprising similarities between the crystal packing of borazine and benzene and also between B,B',B″-trichloroborazine and 1,3,5-trichlorobenzene.
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Affiliation(s)
- María Del Rosario Merino-García
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco, km. 14.5, Toluca, Estado de México C.P. 50200, México
| | - Luis Antonio Soriano-Agueda
- Universidad Nacional Autónoma de México, Instituto de Química, Ciudad Universitaria, Circuito Exterior s/n, Ciudad de México 04510, México
| | - Juan de Dios Guzmán-Hernández
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco, km. 14.5, Toluca, Estado de México C.P. 50200, México
| | - Diego Martínez-Otero
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco, km. 14.5, Toluca, Estado de México C.P. 50200, México.,Universidad Nacional Autónoma de México, Instituto de Química, Ciudad Universitaria, Circuito Exterior s/n, Ciudad de México 04510, México
| | - Bruno Landeros Rivera
- CNRS, Laboratoire de Chimie Théorique, LCT, Sorbonne Université, Paris 75005, France
| | - Fernando Cortés-Guzmán
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco, km. 14.5, Toluca, Estado de México C.P. 50200, México.,Universidad Nacional Autónoma de México, Instituto de Química, Ciudad Universitaria, Circuito Exterior s/n, Ciudad de México 04510, México
| | - José Enrique Barquera-Lozada
- Universidad Nacional Autónoma de México, Instituto de Química, Ciudad Universitaria, Circuito Exterior s/n, Ciudad de México 04510, México
| | - Vojtech Jancik
- Centro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Carretera Toluca-Atlacomulco, km. 14.5, Toluca, Estado de México C.P. 50200, México.,Universidad Nacional Autónoma de México, Instituto de Química, Ciudad Universitaria, Circuito Exterior s/n, Ciudad de México 04510, México
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3
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Steuer L, Kaifer E, Himmel HJ. On the metal-ligand bonding in dinuclear complexes with redox-active guanidine ligands. Dalton Trans 2021; 50:9467-9482. [PMID: 34136887 DOI: 10.1039/d1dt01354h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Coordination compounds with redox-active ligands are currently intensively studied. Within this research theme, redox-active guanidines have been established as a new, eminent class of redox-active ligands. In this work the variation of metal-guanidine bonding in dinuclear transition metal complexes with bridging redox-active tetrakisguanidine ligands is analysed. A series of dinuclear complexes with different metals (Mn, Fe, Co, Ni, Cu and Zn) is synthesized, using either newly prepared redox-active tetrakisguanidino-dioxine or previously reported tetrakisguanidino-benzene ligands. The discussion of the bond properties in this work is predominantly based on the trends of structural parameters, derived from determination of single-crystal structures by X-ray diffraction and quantum chemical calculations. In addition, the trends in the redox potentials and magnetometric (SQUID) measurements on some of the complexes are included. Due to their combined σ- and π-electron donor capability, redox-active guanidine ligands are weak-field ligands; the σ- and π-bonding contributions vary with the metal. The results highlight the peculiarity of copper-guanidine bonding with a high π-bond contribution to metal-guanidine bonding, enabled by structural distortion of the coordination mode from tetrahedral in the direction of square-planar, short copper-guanidine bonds and minor displacement of the copper atoms from the ligand aromatic plane.
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Affiliation(s)
- Lena Steuer
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
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4
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Lohmeyer L, Kaifer E, Enders M, Himmel H. Switching from Metal- to Ligand-Based Oxidation in Cobalt Complexes with Redox-Active Bisguanidine Ligands. Chemistry 2021; 27:11852-11867. [PMID: 34101917 PMCID: PMC8457109 DOI: 10.1002/chem.202101364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Indexed: 11/19/2022]
Abstract
The control of the redox reactivity, magnetic and optical properties of the different redox states of complexes with redox‐active ligands permits their rational use in catalysis and materials science. The redox‐chemistry of octahedrally coordinated high‐spin CoII complexes (three unpaired electrons) with one redox‐active bisguanidine ligand and two acetylacetonato (acac) co‐ligands is completely changed by replacing the acac by hexafluoro‐acetylacetonato (hfacac) co‐ligands. The first one‐electron oxidation is metal‐centered in the case of the complexes with acac co‐ligands, giving diamagnetic CoIII complexes. By contrast, in the case of the less Lewis‐basic hfacac co‐ligands, the first one‐electron oxidation becomes ligand‐centered, leading to high‐spin CoII complexes with a radical monocationic guanidine ligand unit (four unpaired electrons). Ferromagnetic coupling between the spins on the metal and the organic radical in solution is evidenced by temperature‐dependent paramagnetic NMR studies, allowing to estimate the isotropic exchange coupling constant in solution. Second one‐electron oxidation leads to high‐spin CoII complexes with dicationic guanidine ligand units (three unpaired electrons) in the presence of hfacac co‐ligands, but to low‐spin CoIII complexes with radical monocationic, peralkylated guanidine ligand (one unpaired electron) in the presence of acac co‐ligands. The analysis of the electronic structures is complemented by quantum‐chemical calculations on the spin density distributions and relative energies of the possible redox isomers.
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Affiliation(s)
- Lukas Lohmeyer
- Inorganic ChemistryRuprecht-Karls University of HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Elisabeth Kaifer
- Inorganic ChemistryRuprecht-Karls University of HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Markus Enders
- Inorganic ChemistryRuprecht-Karls University of HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Hans‐Jörg Himmel
- Inorganic ChemistryRuprecht-Karls University of HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
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5
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Lohmeyer L, Schön F, Kaifer E, Himmel H. Stimulierung eines redoxinduzierten Elektronentransfers durch Interligand‐Wasserstoffbrücken in einem Cobaltkomplex mit redoxaktivem Guanidin‐Liganden. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101423] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Lukas Lohmeyer
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
| | - Florian Schön
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
| | - Hans‐Jörg Himmel
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
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6
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Lohmeyer L, Schön F, Kaifer E, Himmel HJ. Stimulation of Redox-Induced Electron Transfer by Interligand Hydrogen Bonding in a Cobalt Complex with Redox-Active Guanidine Ligand. Angew Chem Int Ed Engl 2021; 60:10415-10422. [PMID: 33616266 PMCID: PMC8252010 DOI: 10.1002/anie.202101423] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Indexed: 12/27/2022]
Abstract
Octahedrally coordinated cobalt(II) complexes with a redox‐active bisguanidine ligand and acac co‐ligands were synthesized and their redox chemistry analysed in detail. The N−H functions in a bisguanidine ligand with partially alkylated guanidino groups form N−H⋅⋅⋅O hydrogen bonds with the acac co‐ligands, thereby massively influencing the redox chemistry. For all complexes, the first one‐electron oxidation is metal‐centred, leading to CoIII complexes with neutral bisguanidine ligand units. Further one‐electron oxidation is ligand‐centred in the case of Co–bisguanidine complexes with fully alkylated guanidino groups, giving CoIII complexes with radical monocationic bisguanidine ligands. On the other hand, the hydrogen‐bond strengthening upon oxidation of the Co–bisguanidine complex with partially alkylated guanidino groups initiates metal reduction (CoIII→CoII) and two‐electron oxidation of the guanidine ligand, providing the first example for the stimulation of redox‐induced electron transfer by interligand hydrogen bonding.
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Affiliation(s)
- Lukas Lohmeyer
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Florian Schön
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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7
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Zuo S, Zhang F, Liu J, Zuo A. Synthesis of bis(2-imino-1,3-dimethylbenzimidazoline)s via reactions of a solvothermally prepared benzimidazolium chloride and diamines. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Haaf S, Kaifer E, Wadepohl H, Himmel H. Use of Crown Ether Functions as Secondary Coordination Spheres for the Manipulation of Ligand-Metal Intramolecular Electron Transfer in Copper-Guanidine Complexes. Chemistry 2021; 27:959-970. [PMID: 32833269 PMCID: PMC7839521 DOI: 10.1002/chem.202003469] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Indexed: 01/16/2023]
Abstract
Intramolecular electron transfer (IET) between a redox-active organic ligand and a metal in a complex is of fundamental interest and used in a variety of applications. In this work it is demonstrated that secondary coordination sphere motifs can be applied to trigger a radical change in the electronic structure of copper complexes with a redox-active guanidine ligand through ligand-metal IET. Hence, crown ether functions attached to the ligand allow the manipulation of the degree of IET between the guanidine ligand and the copper atom through metal encapsulation.
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Affiliation(s)
- Sebastian Haaf
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Hubert Wadepohl
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Hans‐Jörg Himmel
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
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9
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Wagner C, Kreis F, Popp D, Hübner O, Kaifer E, Himmel H. 1,2,4,5‐Tetrakis(tetramethylguanidino)‐3,6‐diethynyl‐benzenes: Fluorescent Probes, Redox‐Active Ligands and Strong Organic Electron Donors. Chemistry 2020; 26:10336-10347. [PMID: 32368816 PMCID: PMC7497081 DOI: 10.1002/chem.202001557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/30/2020] [Indexed: 11/25/2022]
Abstract
In this work, the change of reactivity induced by the introduction of two para‐ethynyl substituents (CCSi(iPr)3 or CCH) to the organic electron‐donor 1,2,4,5‐tetrakis(tetramethylguanidino)‐benzene is evaluated. The redox‐properties and redox‐state dependent fluorescence are evaluated, and dinuclear CuI and CuII complexes synthesized. The Lewis‐acidic B(C6F5)3 substitutes the proton of the ethynyl −CCH groups to give new anionic −CCB(C6F5)3− substituents, leading eventually to a novel dianionic strong electron donor in its diprotonated form. Its two‐electron oxidation with dioxygen in the presence of a copper catalyst yields the first redox‐active guanidine that is neutral (instead of cationic) in its oxidized form.
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Affiliation(s)
- Conrad Wagner
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Franka Kreis
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Dennis Popp
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Olaf Hübner
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Hans‐Jörg Himmel
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
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10
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Ortmeyer J, Vukadinovic Y, Neuba A, Flörke U, Henkel G. Combining a Phenanthroline Moiety with Peralkylated Guanidine Residues: Homometallic Cu
II
, Ni
II
and Zn
II
Halide Complexes with Site‐Differentiating Janus Head Ligands. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800905] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Jochen Ortmeyer
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Yannik Vukadinovic
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Adam Neuba
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Ulrich Flörke
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
| | - Gerald Henkel
- Fakultät für Naturwissenschaften Department Chemie Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
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11
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12
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Schrempp DF, Kaifer E, Himmel HJ. Solvent Control of Ligand-Metal Electron Transfer in Mononuclear Copper Complexes with Redox-Active Bisguanidine Ligands. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800525] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- David F. Schrempp
- Anorganisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
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13
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Meier SC, Holz A, Kulenkampff J, Schmidt A, Kratzert D, Himmel D, Schmitz D, Scheidt EW, Scherer W, Bülow C, Timm M, Lindblad R, Akin ST, Zamudio-Bayer V, von Issendorff B, Duncan MA, Lau JT, Krossing I. Access to the Bis-benzene Cobalt(I) Sandwich Cation and its Derivatives: Synthons for a "Naked" Cobalt(I) Source? Angew Chem Int Ed Engl 2018; 57:9310-9314. [PMID: 29847000 DOI: 10.1002/anie.201803108] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 05/25/2018] [Indexed: 11/09/2022]
Abstract
The synthesis and structural characterization of the hitherto unknown parent Co(bz)2+ (bz=benzene) complex and several of its derivatives are described. Their synthesis starts either from a CoCO5+ salt, or directly from Co2 (CO)8 and a Ag+ salt. Stability and solubility of these complexes was achieved by using the weakly coordinating anions (WCAs) [Al(ORF )4 ]- and [F{Al(ORF )3 }2 ]- {RF =C(CF3 )3 } and the solvent ortho-difluorobenzene (o-DFB). The magnetic properties of Co(bz)2+ were measured and compared in the condensed and gas phases. The weakly bound Co(o-dfb)2+ salts are of particular interest for the preparation of further CoI salts, for example, the structurally characterized low-coordinate 12 valence electron Co(Pt Bu3 )2+ and Co(NHC)2+ salts.
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Affiliation(s)
- Stefan C Meier
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Albina Holz
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Jan Kulenkampff
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Alexei Schmidt
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Daniel Kratzert
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Daniel Himmel
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
| | - Dominik Schmitz
- Institut für Physik, Universität Augsburg, Universitätsstrasse 1, 86159, Augsburg, Germany
| | - Ernst-Wilhelm Scheidt
- Institut für Physik, Universität Augsburg, Universitätsstrasse 1, 86159, Augsburg, Germany
| | - Wolfgang Scherer
- Institut für Physik, Universität Augsburg, Universitätsstrasse 1, 86159, Augsburg, Germany
| | - Christine Bülow
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489, Berlin, Germany.,Technische Universität Berlin, Institut für Optik und Atomare Physik, Hardenbergstrasse 36, 10623, Berlin, Germany
| | - Martin Timm
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489, Berlin, Germany.,Technische Universität Berlin, Institut für Optik und Atomare Physik, Hardenbergstrasse 36, 10623, Berlin, Germany
| | - Rebecka Lindblad
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489, Berlin, Germany.,Lunds Universitet, Synkrotronljusfysik, Box 118, 221000, Lund, Sweden
| | - Scott T Akin
- Department of Chemistry, University of Georgia, Athens, Georgia, 30602, USA
| | - Vicente Zamudio-Bayer
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489, Berlin, Germany.,Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104, Freiburg, Germany
| | - Bernd von Issendorff
- Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104, Freiburg, Germany
| | - Michael A Duncan
- Department of Chemistry, University of Georgia, Athens, Georgia, 30602, USA
| | - J Tobias Lau
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489, Berlin, Germany.,Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104, Freiburg, Germany
| | - Ingo Krossing
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF), Universität Freiburg, Albertstrasse 21, 79104, Freiburg, Germany
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14
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Meier SC, Holz A, Kulenkampff J, Schmidt A, Kratzert D, Himmel D, Schmitz D, Scheidt EW, Scherer W, Bülow C, Timm M, Lindblad R, Akin ST, Zamudio-Bayer V, von Issendorff B, Duncan MA, Lau JT, Krossing I. Access to the Bis-benzene Cobalt(I) Sandwich Cation and its Derivatives: Synthons for a “Naked” Cobalt(I) Source? Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803108] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Stefan C. Meier
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstrasse 21 79104 Freiburg Germany
| | - Albina Holz
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstrasse 21 79104 Freiburg Germany
| | - Jan Kulenkampff
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstrasse 21 79104 Freiburg Germany
| | - Alexei Schmidt
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstrasse 21 79104 Freiburg Germany
| | - Daniel Kratzert
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstrasse 21 79104 Freiburg Germany
| | - Daniel Himmel
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstrasse 21 79104 Freiburg Germany
| | - Dominik Schmitz
- Institut für Physik; Universität Augsburg; Universitätsstrasse 1 86159 Augsburg Germany
| | - Ernst-Wilhelm Scheidt
- Institut für Physik; Universität Augsburg; Universitätsstrasse 1 86159 Augsburg Germany
| | - Wolfgang Scherer
- Institut für Physik; Universität Augsburg; Universitätsstrasse 1 86159 Augsburg Germany
| | - Christine Bülow
- Helmholtz-Zentrum Berlin für Materialien und Energie; Albert-Einstein-Strasse 15 12489 Berlin Germany
- Technische Universität Berlin; Institut für Optik und Atomare Physik; Hardenbergstrasse 36 10623 Berlin Germany
| | - Martin Timm
- Helmholtz-Zentrum Berlin für Materialien und Energie; Albert-Einstein-Strasse 15 12489 Berlin Germany
- Technische Universität Berlin; Institut für Optik und Atomare Physik; Hardenbergstrasse 36 10623 Berlin Germany
| | - Rebecka Lindblad
- Helmholtz-Zentrum Berlin für Materialien und Energie; Albert-Einstein-Strasse 15 12489 Berlin Germany
- Lunds Universitet; Synkrotronljusfysik, Box 118 221000 Lund Sweden
| | - Scott T. Akin
- Department of Chemistry; University of Georgia; Athens Georgia 30602 USA
| | - Vicente Zamudio-Bayer
- Helmholtz-Zentrum Berlin für Materialien und Energie; Albert-Einstein-Strasse 15 12489 Berlin Germany
- Physikalisches Institut; Universität Freiburg; Hermann-Herder-Strasse 3 79104 Freiburg Germany
| | - Bernd von Issendorff
- Physikalisches Institut; Universität Freiburg; Hermann-Herder-Strasse 3 79104 Freiburg Germany
| | - Michael A. Duncan
- Department of Chemistry; University of Georgia; Athens Georgia 30602 USA
| | - J. Tobias Lau
- Helmholtz-Zentrum Berlin für Materialien und Energie; Albert-Einstein-Strasse 15 12489 Berlin Germany
- Physikalisches Institut; Universität Freiburg; Hermann-Herder-Strasse 3 79104 Freiburg Germany
| | - Ingo Krossing
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum (FMF); Universität Freiburg; Albertstrasse 21 79104 Freiburg Germany
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15
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Lorenz R, Kaifer E, Wadepohl H, Himmel HJ. Di- and tetranuclear transition metal complexes of a tetrakisguanidino-substituted phenazine dye by stepwise coordination. Dalton Trans 2018; 47:11016-11029. [DOI: 10.1039/c8dt02176g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Coordination of a tetrakisguanidino-substituted phenazine dye in two steps provides rational access to tetranuclear homo- and heterobimetallic complexes.
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Affiliation(s)
- Roxana Lorenz
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
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16
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Ziesak A, Steuer L, Kaifer E, Wagner N, Beck J, Wadepohl H, Himmel HJ. Intramolecular metal–ligand electron transfer triggered by co-ligand substitution. Dalton Trans 2018; 47:9430-9441. [DOI: 10.1039/c8dt01234b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Labile co-ligands are attached to a dinuclear copper(i) complex with a redox-active bridging guanidine ligand. Their substitution triggers electron-transfer from the copper atoms to the guanidine.
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Affiliation(s)
- Alexandra Ziesak
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Lena Steuer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Norbert Wagner
- Institut für Anorganische Chemie
- Universität Bonn
- 53121 Bonn
- Germany
| | - Johannes Beck
- Institut für Anorganische Chemie
- Universität Bonn
- 53121 Bonn
- Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
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17
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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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18
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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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19
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Herrmann H, Kaifer E, Himmel H. Hydrogen‐Atom Transfer (HAT) Initiated by Intramolecular Ligand–Metal Electron Transfer. Chemistry 2017; 23:5520-5528. [DOI: 10.1002/chem.201605971] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Indexed: 01/02/2023]
Affiliation(s)
- Hendrik Herrmann
- Anorganisch-Chemisches Institut Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Hans‐Jörg Himmel
- Anorganisch-Chemisches Institut Ruprecht-Karls Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
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20
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He X, Deng Y, Jiang X, Wang Z, Yang Y, Han Z, Chen D. Copolymerization of norbornene and butyl methacrylate at elevated temperatures by a single centre nickel catalyst bearing bulky bis(α-diimine) ligand with strong electron-withdrawing groups. Polym Chem 2017. [DOI: 10.1039/c7py00081b] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bis(α-diimine) single nickel(ii) catalyst with strong electron-withdrawing group was applied to catalyze polymerization and copolymerization of norbornene and butyl methacrylate.
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Affiliation(s)
- Xiaohui He
- School of Materials Science and Engineering
- Nanchang University
- Nanchang 330031
- China
| | - Yingjiao Deng
- School of Materials Science and Engineering
- Nanchang University
- Nanchang 330031
- China
| | - Xiong Jiang
- School of Materials Science and Engineering
- Nanchang University
- Nanchang 330031
- China
| | - Zijie Wang
- School of Materials Science and Engineering
- Nanchang University
- Nanchang 330031
- China
| | - Yingping Yang
- School of Materials Science and Engineering
- Nanchang University
- Nanchang 330031
- China
| | - Zhilong Han
- School of Materials Science and Engineering
- Nanchang University
- Nanchang 330031
- China
| | - Defu Chen
- School of Civil Engineering and Architecture
- Nanchang University
- Nanchang 330031
- China
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21
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Schrempp DF, Kaifer E, Wadepohl H, Himmel HJ. Copper Complexes of New Redox-Active 4,5-Bisguanidino-Substituted Benzodioxole Ligands: Control of the Electronic Structure by Counter-Ligands, Solvent, and Temperature. Chemistry 2016; 22:16187-16199. [DOI: 10.1002/chem.201602402] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Indexed: 12/26/2022]
Affiliation(s)
- David Fridolin Schrempp
- 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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22
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Hoffmann A, Stanek J, Dicke B, Peters L, Grimm-Lebsanft B, Wetzel A, Jesser A, Bauer M, Gnida M, Meyer-Klaucke W, Rübhausen M, Herres-Pawlis S. Implications of Guanidine Substitution on Copper Complexes as Entatic-State Models. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600655] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Alexander Hoffmann
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Julia Stanek
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
| | - Benjamin Dicke
- Universität Hamburg; Institut für Nanostruktur- und Festkörperphysik and Center for Free-Electron Laser Science; Notkestrasse 85 22607 Hamburg Germany
| | - Laurens Peters
- Department Chemie; Ludwig-Maximilians Universität München; Butenandtstraße 5-13 81377 München Germany
| | - Benjamin Grimm-Lebsanft
- Universität Hamburg; Institut für Nanostruktur- und Festkörperphysik and Center for Free-Electron Laser Science; Notkestrasse 85 22607 Hamburg Germany
| | - Alina Wetzel
- Universität Hamburg; Institut für Nanostruktur- und Festkörperphysik and Center for Free-Electron Laser Science; Notkestrasse 85 22607 Hamburg Germany
| | - Anton Jesser
- Department Chemie; Ludwig-Maximilians Universität München; Butenandtstraße 5-13 81377 München Germany
| | - Matthias Bauer
- Universität Paderborn; Department Chemie; Warburger Str. 100 33098 Paderborn Germany
| | - Manuel Gnida
- Universität Paderborn; Department Chemie; Warburger Str. 100 33098 Paderborn Germany
| | - Wolfram Meyer-Klaucke
- Universität Paderborn; Department Chemie; Warburger Str. 100 33098 Paderborn Germany
| | - Michael Rübhausen
- Universität Hamburg; Institut für Nanostruktur- und Festkörperphysik and Center for Free-Electron Laser Science; Notkestrasse 85 22607 Hamburg Germany
| | - Sonja Herres-Pawlis
- Institut für Anorganische Chemie; RWTH Aachen University; Landoltweg 1 52074 Aachen Germany
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23
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Wiesner S, Wagner A, Kaifer E, Himmel HJ. A Valence Tautomeric Dinuclear Copper Tetrakisguanidine Complex. Chemistry 2016; 22:10438-45. [DOI: 10.1002/chem.201601169] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Revised: 05/18/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Sven Wiesner
- Anorganisch-Chemisches Institut; Ruprecht-Karls Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Arne Wagner
- Anorganisch-Chemisches Institut; Ruprecht-Karls Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut; Ruprecht-Karls Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut; Ruprecht-Karls Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
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24
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Eberle B, Damjanović M, Enders M, Leingang S, Pfisterer J, Krämer C, Hübner O, Kaifer E, Himmel HJ. Radical Monocationic Guanidino-Functionalized Aromatic Compounds (GFAs) as Bridging Ligands in Dinuclear Metal Acetate Complexes: Synthesis, Electronic Structure, and Magnetic Coupling. Inorg Chem 2016; 55:1683-96. [DOI: 10.1021/acs.inorgchem.5b02614] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Benjamin Eberle
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Marko Damjanović
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Markus Enders
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Simone Leingang
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Jessica Pfisterer
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Christoph Krämer
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Olaf Hübner
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Elisabeth Kaifer
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Hans-Jörg Himmel
- Ruprecht-Karls-Universität Heidelberg, Anorganisch-Chemisches Institut, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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25
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Krämer C, Leingang S, Hübner O, Kaifer E, Wadepohl H, Himmel HJ. Construction of copper chains with new fluorescent guanidino-functionalized naphthyridine ligands. Dalton Trans 2016; 45:16966-16983. [DOI: 10.1039/c6dt03166h] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A high charge and a low coordination number are the characteristics of fluorescent Cu4 chain complexes with 2,7-bisguanidino-naphthyridine ligands.
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Affiliation(s)
- Christoph Krämer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Simone Leingang
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Olaf Hübner
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
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26
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Molecular structure and DFT investigations on new cobalt(II) chloride complex with superbase guanidine type ligand. J CHEM SCI 2015. [DOI: 10.1007/s12039-015-0976-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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27
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Wiesner S, Wagner A, Hübner O, Kaifer E, Himmel H. Thermochromism of Cu
I
Tetrakisguanidine Complexes: Reversible Activation of Metal‐to‐Ligand Charge‐Transfer Bands. Chemistry 2015; 21:16494-503. [DOI: 10.1002/chem.201502584] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Sven Wiesner
- Anorganisch‐Chemisches Institut, Ruprecht‐Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐545707
| | - Arne Wagner
- Anorganisch‐Chemisches Institut, Ruprecht‐Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐545707
| | - Olaf Hübner
- Anorganisch‐Chemisches Institut, Ruprecht‐Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐545707
| | - Elisabeth Kaifer
- Anorganisch‐Chemisches Institut, Ruprecht‐Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐545707
| | - Hans‐Jörg Himmel
- Anorganisch‐Chemisches Institut, Ruprecht‐Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐545707
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28
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Huo P, Liu W, He X, Mei G. Vinylic copolymerization of norbornene and higher 1-alkene with three-dimensional geometry binickel catalyst. JOURNAL OF POLYMER RESEARCH 2015. [DOI: 10.1007/s10965-015-0835-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Wild U, Kaifer E, Wadepohl H, Himmel HJ. Combined Oxidation, Deprotonation, and Metal Coordination of a Redox-Active Guanidine Ligand. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500597] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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30
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Glöge T, Aal F, Filimon SA, Jones PG, Michaelis de Vasconcellos J, Herres-Pawlis S, Tamm M. Transition Metal Complexes ContainingC2-Symmetric Bis(imidazolin-2-imine) Ligands Derived from a 1-Alkyl-3-arylimidazolin-2-ylidene. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500569] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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31
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Bindewald E, Lorenz R, Hübner O, Brox D, Herten DP, Kaifer E, Himmel HJ. Tetraguanidino-functionalized phenazine and fluorene dyes: synthesis, optical properties and metal coordination. Dalton Trans 2015; 44:3467-85. [DOI: 10.1039/c4dt03572k] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Functionalization of phenazine with guanidino groups leads to new highly fluorescent dyes and ligands, and metal coordination is shown to alter significantly the optical properties.
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Affiliation(s)
- Elvira Bindewald
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Roxana Lorenz
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Olaf Hübner
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Dominik Brox
- Cellnetworks Cluster and Inst. for Physical Chemistry
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Dirk-Peter Herten
- Cellnetworks Cluster and Inst. for Physical Chemistry
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut
- Ruprecht-Karls-Universität Heidelberg
- 69120 Heidelberg
- Germany
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32
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Ziesak A, Wesp T, Hübner O, Kaifer E, Wadepohl H, Himmel HJ. Counter-ligand control of the electronic structure in dinuclear copper-tetrakisguanidine complexes. Dalton Trans 2015; 44:19111-25. [DOI: 10.1039/c5dt03270a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Decision-making counter-ligands: a bridging redox-active ligand in a dinuclear copper complex could be either neutral (complex type [CuII-GFA-CuII]) or dicationic (complex type [CuI-GFA-CuI]), depending on the nature of the counter-ligands X.
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Affiliation(s)
- Alexandra Ziesak
- Anorganisch-Chemisches Institut
- Ruprecht-Karls Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Tobias Wesp
- Anorganisch-Chemisches Institut
- Ruprecht-Karls Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Olaf Hübner
- Anorganisch-Chemisches Institut
- Ruprecht-Karls Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut
- Ruprecht-Karls Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut
- Ruprecht-Karls Universität Heidelberg
- 69120 Heidelberg
- Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut
- Ruprecht-Karls Universität Heidelberg
- 69120 Heidelberg
- Germany
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33
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Trumm C, Hübner O, Walter P, Leingang S, Wild U, Kaifer E, Eberle B, Himmel HJ. One- versus Two-Electron Oxidation of Complexed Guanidino-Functionalized Aromatic Compounds. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402840] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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34
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Lebkücher A, Wagner C, Hübner O, Kaifer E, Himmel HJ. Trinuclear Complexes and Coordination Polymers of Redox-Active Guanidino-Functionalized Aromatic (GFA) Compounds with a Triphenylene Core. Inorg Chem 2014; 53:9876-96. [DOI: 10.1021/ic501482u] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Anna Lebkücher
- Anorganisch-Chemisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Christoph Wagner
- Anorganisch-Chemisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Olaf Hübner
- Anorganisch-Chemisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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35
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Kögel JF, Xie X, Baal E, Gesevičius D, Oelkers B, Kovačević B, Sundermeyer J. Superbasic Alkyl‐Substituted Bisphosphazene Proton Sponges: Synthesis, Structural Features, Thermodynamic and Kinetic Basicity, Nucleophilicity and Coordination Chemistry. Chemistry 2014; 20:7670-85. [DOI: 10.1002/chem.201402226] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Julius F. Kögel
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
| | - Xiulan Xie
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
| | - Eduard Baal
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
| | - Donatas Gesevičius
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
| | - Benjamin Oelkers
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
| | - Borislav Kovačević
- Quantum Chemistry Group, Rudjer Bošković Institute, Bijenička c. 54, 10000 Zagreb (Croatia)
| | - Jörg Sundermeyer
- Fachbereich Chemie, Philipps‐Universität Marburg, Hans‐Meerwein‐Straße, 35032 Marburg (Germany), Fax: (+49) 642128‐25711
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36
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Wild U, Neuhäuser C, Wiesner S, Kaifer E, Wadepohl H, Himmel HJ. Redox-controlled hydrogen bonding: turning a superbase into a strong hydrogen-bond donor. Chemistry 2014; 20:5914-25. [PMID: 24757064 DOI: 10.1002/chem.201304882] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 02/24/2014] [Indexed: 11/10/2022]
Abstract
Herein the synthesis, structures and properties of hydrogen-bonded aggregates involving redox-active guanidine superbases are reported. Reversible hydrogen bonding is switched on by oxidation of the hydrogen-donor unit, and leads to formation of aggregates in which the hydrogen-bond donor unit is sandwiched by two hydrogen-bond acceptor units. Further oxidation (of the acceptor units) leads again to deaggregation. Aggregate formation is associated with a distinct color change, and the electronic situation could be described as a frozen stage on the way to hydrogen transfer. A further increase in the basicity of the hydrogen-bond acceptor leads to deprotonation reactions.
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Affiliation(s)
- Ute Wild
- Anorganisch-Chemisches Institut, Ruprecht-Karls Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany)
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37
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Herrmann H, Ziesak A, Wild U, Leingang S, Schrempp D, Wagner N, Beck J, Kaifer E, Wadepohl H, Himmel HJ. Tetracyanoquinodimethane Reduction by Complexed Guanidinyl-Functionalized Aromatic Compounds. Chemphyschem 2014; 15:351-65. [DOI: 10.1002/cphc.201300862] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Indexed: 01/17/2023]
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38
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Huo P, Liu W, He X, Wei Z, Chen Y. Substituent effects and activation mechanism of norbornene polymerization catalyzed by three-dimensional geometry α-diimine palladium complexes. Polym Chem 2014. [DOI: 10.1039/c3py01092a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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39
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Krämer C, Wild U, Hübner O, Neuhäuser C, Kaifer E, Himmel HJ. Stabilization of Complexes of Redox-Active Guanidino-Functionalized Aromatic Compounds (GFAs) by Hydrogen-Bonding. Aust J Chem 2014. [DOI: 10.1071/ch14175] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The guanidino-functionalized 1,2,4,5-tetrakis(N,N′-diisopropylguanidino)benzene could act as a redox-active switch, and reversibly forms hydrogen-bond aggregates upon two-electron oxidation. Herein the influence of hydrogen bonding on the structure and electronic properties of the first transition metal complexes of the neutral and oxidized compound are studied. Reaction with CuCl2 leads by coupled redox- and coordination processes to a dinuclear CuII complex of the dicationic guanidine, in which CuCl2– counterions are locked through strong hydrogen-bonds in positions above and below the C6 ring plane. The electronic situation in the electronic ground and excited states of this complex were analysed by quantum chemical calculations.
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40
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Kögel JF, Kneusels NJ, Sundermeyer J. Two C2-symmetric chelating P2-bisphosphazene superbases connected via a binaphthyl backbone – synthesis, structural features and preparation of a cationic alkyl aluminum complex. Chem Commun (Camb) 2014; 50:4319-21. [DOI: 10.1039/c4cc00773e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two P2-phosphazene Schwesinger bases were combined into a stereorigid chiral tetraphosphazene superbase and superdonor.
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Affiliation(s)
- Julius F. Kögel
- Philipps-Universität Marburg
- Fachbereich Chemie
- 35032 Marburg, Germany
| | | | - Jörg Sundermeyer
- Philipps-Universität Marburg
- Fachbereich Chemie
- 35032 Marburg, Germany
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41
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Klapp LRR, Bruhn C, Leibold M, Siemeling U. Ferrocene-Based Bis(guanidines): Superbases for Tridentate N,Fe,N-Coordination. Organometallics 2013. [DOI: 10.1021/om400454v] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lutz R. R. Klapp
- 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
| | - Michael Leibold
- Institute of Chemistry, University of Kassel, Heinrich-Plett-Straße
40, 34132 Kassel, Germany
| | - Ulrich Siemeling
- Institute of Chemistry, University of Kassel, Heinrich-Plett-Straße
40, 34132 Kassel, Germany
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42
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Maronna A, Hübner O, Enders M, Kaifer E, Himmel HJ. Bisguanidines with Biphenyl, Binaphthyl, and Bipyridyl Cores: Proton-Sponge Properties and Coordination Chemistry. Chemistry 2013; 19:8958-77. [DOI: 10.1002/chem.201204294] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 03/12/2013] [Indexed: 11/10/2022]
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43
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Huo P, Liu W, He X, Wang H, Chen Y. Nickel(II) Complexes with Three-Dimensional Geometry α-Diimine Ligands: Synthesis and Catalytic Activity toward Copolymerization of Norbornene. Organometallics 2013. [DOI: 10.1021/om300883h] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ping Huo
- Department of Chemistry/Institute of Polymers, Nanchang University, 999 Xuefu Avenue, Nanchang 330031,
People’s Republic of China
- Key Laboratory of Jiangxi University
for Applied Chemistry and Chemical Biology, Yichun University, Yichun 336000, People’s Republic
of China
| | - Wanyun Liu
- Department of Chemistry/Institute of Polymers, Nanchang University, 999 Xuefu Avenue, Nanchang 330031,
People’s Republic of China
- Key Laboratory of Jiangxi University
for Applied Chemistry and Chemical Biology, Yichun University, Yichun 336000, People’s Republic
of China
| | - Xiaohui He
- Department of Chemistry/Institute of Polymers, Nanchang University, 999 Xuefu Avenue, Nanchang 330031,
People’s Republic of China
| | - Hongming Wang
- Department of Chemistry/Institute of Polymers, Nanchang University, 999 Xuefu Avenue, Nanchang 330031,
People’s Republic of China
| | - Yiwang Chen
- Department of Chemistry/Institute of Polymers, Nanchang University, 999 Xuefu Avenue, Nanchang 330031,
People’s Republic of China
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44
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Himmel HJ. Guanidinyl-Functionalized Aromatic Compounds (GFAs) - Charge and Spin Density Studies as Starting Points for the Development of a New Class of Redox-active Ligands. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201200496] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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45
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Luca OR, Konezny SJ, Paulson EK, Habib F, Luthy KM, Murugesu M, Crabtree RH, Batista VS. Study of an S = 1 NiII pincer electrocatalyst precursor for aqueous hydrogen production based on paramagnetic 1H NMR. Dalton Trans 2013; 42:8802-7. [DOI: 10.1039/c3dt50528f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Wiesner S, Ziesak A, Reinmuth M, Walter P, Kaifer E, Wadepohl H, Himmel HJ. 4,4′,5,5′-Tetrakis(guanidinyl)binaphthyl - Synthesis and Properties of Two Redox-Active Ligands and Oxidative C-C Coupling to Perylene Derivatives. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200784] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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47
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Stang S, Lebkücher A, Walter P, Kaifer E, Himmel HJ. Redox-Active Guanidine Ligands with Pyridine andp-Benzoquinone Backbones. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200679] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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48
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Bienemann O, Froin AK, dos Santos Vieira I, Wortmann R, Hoffmann A, Herres-Pawlis S. Structural Aspects of Copper-Mediated Atom Transfer Radical Polymerization with a Novel Tetradentate Bisguanidine Ligand. Z Anorg Allg Chem 2012. [DOI: 10.1002/zaac.201200092] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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49
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Fischer A, Tiana D, Scherer W, Batke K, Eickerling G, Svendsen H, Bindzus N, Iversen BB. Experimental and theoretical charge density studies at subatomic resolution. J Phys Chem A 2011; 115:13061-71. [PMID: 21863852 DOI: 10.1021/jp2050405] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Analysis of accurate experimental and theoretical structure factors of diamond and silicon reveals that the contraction of the core shell due to covalent bond formation causes significant perturbations of the total charge density that cannot be ignored in precise charge density studies. We outline that the nature and origin of core contraction/expansion and core polarization phenomena can be analyzed by experimental studies employing an extended Hansen-Coppens multipolar model. Omission or insufficient treatment of these subatomic charge density phenomena might yield erroneous thermal displacement parameters and high residual densities in multipolar refinements. Our detailed studies therefore suggest that the refinement of contraction/expansion and population parameters of all atomic shells is essential to the precise reconstruction of electron density distributions by a multipolar model. Furthermore, our results imply that also the polarization of the inner shells needs to be adopted, especially in cases where second row or even heavier elements are involved in covalent bonding. These theoretical studies are supported by direct multipolar refinements of X-ray powder diffraction data of diamond obtained from a third-generation synchrotron-radiation source (SPring-8, BL02B2).
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Affiliation(s)
- A Fischer
- Institute of Physics, University of Augsburg, Augsburg, Germany
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50
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Wild U, Kaifer E, Himmel HJ. Redox Chemistry and Group 10 Metal Complexes of Aromatic Compounds with Bulky Bicyclic Guanidino Groups. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100479] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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