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Francis S, Rice CR, Scattergood PA, Elliott PIP. Synthesis and characterisation of group 8 tris(1-benzyl-1,2,3-triazol-4-yl)- p-anisolylmethane complexes. Dalton Trans 2022; 51:13692-13702. [PMID: 36001010 DOI: 10.1039/d2dt02503e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The tris(1,2,3-triazol-4-yl)methane framework offers a highly versatile architecture for ligand design, yet the coordination chemistry of this class of ligand remains largely unexplored. We report here the synthesis and characterisation of the homoleptic complexes [M(ttzm)2](PF6)2 (ttzm = tris(1-benzyl-1,2,3-triazol-4-yl)-p-anisolylmethane; M = Fe (Fe), Ru (Ru), Os (Os)). Initial attempts to prepare Ru by reaction of [Ru(p-cymene)Cl2]2 and ttzm also led to the isolation of the heteroleptic complex [Ru(p-cymene)(ttzm)](PF6)2. The structures of [Ru(p-cymene)(ttzm)](PF6)2, [Fe(ttzm)2]2+ (as its BPh4- salt) and Os were solved by X-ray diffraction. The homoleptic Fe(II) and Os(II) containing cations adopt distorted octahedral geometries due to the steric interactions between the ansiole and triazole rings of the ttzm ligands. The homoleptic complexes all adopt a low-spin d6 configuration and exhibit reversible M(II)/M(III) processes (+0.35 to +0.72 V vs. Fc/Fc+). These oxidation processes are cathodically shifted relative to those of related hexatriazole donor based complexes with density functional theory (DFT) calculations showing the metal d-orbitals are destabilised through a π-donor contribution from the triazole rings. The complexes all show prominent UV-visible absorption bands between 350 and 450 nm assigned to transitions of 1MLCT character. Whilst none of the homoleptic complexes are emissive in room temperature fluid solutions, Os is emissive at 77 K in an EtOH/MeOH glass (λmax 472 nm).
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Affiliation(s)
- Samuel Francis
- Department of Chemical Sciences & Centre for Functional Materials, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK.
| | - Craig R Rice
- Department of Chemical Sciences & Centre for Functional Materials, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK.
| | - Paul A Scattergood
- Department of Chemical Sciences & Centre for Functional Materials, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK.
| | - Paul I P Elliott
- Department of Chemical Sciences & Centre for Functional Materials, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK.
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2
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Nößler M, Hunger D, Neuman NI, Reimann M, Reichert F, Winkler M, Klein J, Bens T, Suntrup L, Demeshko S, Stubbe J, Kaupp M, van Slageren J, Sarkar B. Fluorinated Click-Derived Tripodal Ligands Drive Spin Crossover in both Iron(II) and Cobalt(II) Complexes. Dalton Trans 2022; 51:10507-10517. [DOI: 10.1039/d2dt01005d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Control of the spin state of metal complexes is important because it leads to a precise control over the physical properties and the chemical reactivity of the metal complexes. Currently,...
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Nößler M, Hunger D, Reichert F, Winkler M, Reimann M, Klein J, Suhr S, Suntrup L, Beerhues J, Kaupp M, van Slageren J, Sarkar B. Spin-state control of cobalt(II) and iron(II) complexes with click-derived tripodal ligands through non-covalent and fluorine-specific interactions. Dalton Trans 2021; 50:18097-18106. [PMID: 34851330 DOI: 10.1039/d1dt03535e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The fine-tuning of intermolecular or intramolecular non-covalent interactions (NCIs) and thus the precise synthesis of metal complexes in which the spin states can be controlled by NCIs remains challenging, even though several such complexes have been intensively studied. In this regard, we present mononuclear cobalt(II) and iron(II) complexes with "click"-derived tripodal ligands that contain fluorinated benzyl substituents in the secondary coordination sphere. The complexes were co-crystallized with different solvent molecules to decipher the effect of the crystallized solvents on NCIs, and on the spin state of the metal ion. Additionally, the fluorine-specific interactions in the secondary coordination sphere were examined. We present a first structure-property correlation between the nature of interaction of the (per)fluorinated aromatic substituents on the ligand periphery, and the spin state of the metal complexes. In particular, the TF5TA containing ligand show interesting stacking motifs depending on the used solvent, and these interactions have an influence on the spin state of the cobalt(II) complexes. Furthermore, the iron(II) complex thereof, Fe(TF5TA)2(BF4)2·2EtOH displays spin crossover (SCO).
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Affiliation(s)
- Maite Nößler
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany.
| | - David Hunger
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
| | - Felix Reichert
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
| | - Mario Winkler
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
| | - Marc Reimann
- Institut für Theoretische Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Johannes Klein
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany.
| | - Simon Suhr
- Lehrstuhl für Anorganische Koordinationschemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Lisa Suntrup
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany.
| | - Julia Beerhues
- Lehrstuhl für Anorganische Koordinationschemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Martin Kaupp
- Institut für Theoretische Chemie, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Joris van Slageren
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany. .,Lehrstuhl für Anorganische Koordinationschemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
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4
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Lemes MA, Stein HN, Gabidullin B, Robeyns K, Clérac R, Murugesu M. Probing Magnetic-Exchange Coupling in Supramolecular Squares Based on Reducible Tetrazine-Derived Ligands. Chemistry 2018; 24:4259-4263. [PMID: 29430742 DOI: 10.1002/chem.201800126] [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: 01/11/2018] [Indexed: 12/12/2022]
Abstract
Reducible 3,6-bis(3,5-dimethyl-pyrazolyl)1,2,4,5-tetrazine was employed to isolate supramolecular air-stable [Co4 ] and [Zn4 ] squares, which were achieved via careful selection of counterions rather than the use of reducing agents. Magnetic susceptibility studies revealed a strong radical-CoII exchange coupling (Jrad-Co /hc=-118 cm-1 , -2J formalism) with a spin ground state of ST =4, whereas the unreduced analogue revealed negligible coupling between the Co centers (JCo-Co /hc=-0.64 cm-1 ). Radical-radical coupling was also probed in the [Zn4 ] congener, which led to Jrad-rad /hc=-15.9(5) cm-1 . These results highlight the versatile air-stable coordination chemistry of tetrazine and the importance of exploiting easily reducible delocalized radical to promote strong exchange coupling between spin carriers.
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Affiliation(s)
- Maykon A Lemes
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, D'lorio Hall, 10 Marie Curie, Ottawa, ON, K1N6N5, Canada
| | - Hilarie N Stein
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, D'lorio Hall, 10 Marie Curie, Ottawa, ON, K1N6N5, Canada
| | - Bulat Gabidullin
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, D'lorio Hall, 10 Marie Curie, Ottawa, ON, K1N6N5, Canada
| | - Koen Robeyns
- Institute of Condensed Matter and Nanosciences, MOST-Inorganic Chemistry, Université catholique de Louvain, Place L. Pasteur 1, 1348, Louvain-la-Neuve, Belgium
| | - Rodolphe Clérac
- CNRS, CRPP, UMR 5031, 33600, Pessac, France.,Univ. Bordeaux, CRPP, UMR 5031, 33600, Pessac, France
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, D'lorio Hall, 10 Marie Curie, Ottawa, ON, K1N6N5, Canada
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Schweinfurth D, Krzystek J, Atanasov M, Klein J, Hohloch S, Telser J, Demeshko S, Meyer F, Neese F, Sarkar B. Tuning Magnetic Anisotropy Through Ligand Substitution in Five-Coordinate Co(II) Complexes. Inorg Chem 2017; 56:5253-5265. [DOI: 10.1021/acs.inorgchem.7b00371] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- David Schweinfurth
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - J. Krzystek
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States
| | - Mihail Atanasov
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, D-45470 Mülheim an der Ruhr, Germany
- Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Johannes Klein
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Stephan Hohloch
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
| | - Joshua Telser
- Department of Biological, Chemical, and Physical Sciences, Roosevelt University, Chicago, Illinois 60605, United States
| | - Serhiy Demeshko
- Universität Göttingen, Institut
für Anorganische Chemie, Tammanstraße 4, D-37077 Göttingen, Germany
| | - Franc Meyer
- Universität Göttingen, Institut
für Anorganische Chemie, Tammanstraße 4, D-37077 Göttingen, Germany
| | - Frank Neese
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Biprajit Sarkar
- Institut für
Chemie und Biochemie, Freie Universität Berlin, Fabeckstraße
34-36, D-14195 Berlin, Germany
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6
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Fatur SM, Shepard SG, Higgins RF, Shores MP, Damrauer NH. A Synthetically Tunable System To Control MLCT Excited-State Lifetimes and Spin States in Iron(II) Polypyridines. J Am Chem Soc 2017; 139:4493-4505. [DOI: 10.1021/jacs.7b00700] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Steven M. Fatur
- Department
of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Samuel G. Shepard
- Department
of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Robert F. Higgins
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Matthew P. Shores
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Niels H. Damrauer
- Department
of Chemistry and Biochemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
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7
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Cobalt(II) tris(2-pyridylmethyl)amine complexes [Co(TPA)X]+ bearing coordinating anion (X = Cl−, Br−, I− and NCS−): synthesis and application for carbon dioxide reduction. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.09.049] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Sommer MG, Marx R, Schweinfurth D, Rechkemmer Y, Neugebauer P, van der Meer M, Hohloch S, Demeshko S, Meyer F, van Slageren J, Sarkar B. Control of Complex Formation through Peripheral Substituents in Click-Tripodal Ligands: Structural Diversity in Homo- and Heterodinuclear Cobalt-Azido Complexes. Inorg Chem 2016; 56:402-413. [DOI: 10.1021/acs.inorgchem.6b02330] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Michael G. Sommer
- Institut für Chemie und Biochemie, Anorganische Chemie, Fabeckstraße 34-36, D-14195, Berlin, Germany
| | - Raphael Marx
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - David Schweinfurth
- Institut für Chemie und Biochemie, Anorganische Chemie, Fabeckstraße 34-36, D-14195, Berlin, Germany
| | - Yvonne Rechkemmer
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Petr Neugebauer
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Margarethe van der Meer
- Institut für Chemie und Biochemie, Anorganische Chemie, Fabeckstraße 34-36, D-14195, Berlin, Germany
| | - Stephan Hohloch
- Institut für Chemie und Biochemie, Anorganische Chemie, Fabeckstraße 34-36, D-14195, Berlin, Germany
| | - Serhiy Demeshko
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammanstraße
4, D-37077, Göttingen, Germany
| | - Franc Meyer
- Institut
für Anorganische Chemie, Georg-August-Universität Göttingen, Tammanstraße
4, D-37077, Göttingen, Germany
| | - Joris van Slageren
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569, Stuttgart, Germany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische Chemie, Fabeckstraße 34-36, D-14195, Berlin, Germany
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9
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Manck S, Röger M, van der Meer M, Sarkar B. Heterotri‐ and Heteropentanuclear Copper(I)–Ferrocenyl Complexes Assembled through a “Click” Strategy: A Structural, Electrochemical, and Spectroelectrochemical Investigation. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201601075] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sinja Manck
- Institut für Chemie und Biochemie, Anorganische ChemieFreie Universität BerlinFabeckstraße 34‐3614195BerlinGermany
| | - Marc Röger
- Institut für Chemie und Biochemie, Anorganische ChemieFreie Universität BerlinFabeckstraße 34‐3614195BerlinGermany
| | - Margarethe van der Meer
- Institut für Chemie und Biochemie, Anorganische ChemieFreie Universität BerlinFabeckstraße 34‐3614195BerlinGermany
| | - Biprajit Sarkar
- Institut für Chemie und Biochemie, Anorganische ChemieFreie Universität BerlinFabeckstraße 34‐3614195BerlinGermany
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10
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Sommer MG, Rechkemmer Y, Suntrup L, Hohloch S, van der Meer M, van Slageren J, Sarkar B. Structural snapshots in the copper(ii) induced azide–nitrile cycloaddition: effects of peripheral ligand substituents on the formation of unsupported μ1,1-azido vs. μ1,4-tetrazolato bridged complexes. Dalton Trans 2016; 45:17770-17781. [DOI: 10.1039/c6dt03073d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Peripheral substituents on click-derived tripodal ligands dictate the reactivity of their copper(ii) azido complexes.
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Affiliation(s)
- Michael G. Sommer
- Institut für Chemie und Biochemie
- Anorganische Chemie
- Freie Universität Berlin
- Berlin
- Germany
| | - Yvonne Rechkemmer
- Institut für Physikalische Chemie
- Universität Stuttgart
- Stuttgart
- Germany
| | - Lisa Suntrup
- Institut für Chemie und Biochemie
- Anorganische Chemie
- Freie Universität Berlin
- Berlin
- Germany
| | - Stephan Hohloch
- Institut für Chemie und Biochemie
- Anorganische Chemie
- Freie Universität Berlin
- Berlin
- Germany
| | | | | | - Biprajit Sarkar
- Institut für Chemie und Biochemie
- Anorganische Chemie
- Freie Universität Berlin
- Berlin
- Germany
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