1
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Zhu Y, Mahoney J, Babson AJ, Zhou Z, Wei Z, Gakiya-Teruya M, McNeely J, Rogachev AY, Shatruk M, Petrukhina MA. Homoleptic Rare-Earth-Metal Sandwiches with Dibenzo[ a, e]cyclooctatetraene Dianions. Inorg Chem 2024; 63:9579-9587. [PMID: 38374612 PMCID: PMC11134502 DOI: 10.1021/acs.inorgchem.3c04249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/01/2024] [Accepted: 02/02/2024] [Indexed: 02/21/2024]
Abstract
A family of rare-earth complexes [RE(III) = Y, La, Gd, Tb, Dy, and Er] with doubly reduced dibenzo[a,e]cyclooctatetraene (DBCOT) has been synthesized and structurally characterized. X-ray diffraction analysis confirms that all products of the [RE(DBCOT)(THF)4][RE(DBCOT)2] composition consist of the anionic sandwich [RE(DBCOT)2]- and the cationic counterpart [RE(DBCOT)(THF)4]+. Within the sandwich, two elongated π decks are slightly bent toward the metal center (avg. 7.3°) with a rotation angle of 35.9-37.6°. The RE(III) ion is entrapped between the central eight-membered rings of DBCOT2- in a η8 fashion. The trends in the RE-COT bond lengths are consistent with the variations of the ionic radii of RE(III) centers. The 1H NMR spectra of the diamagnetic Y(III) and La(III) analogues illustrate the distinct solution behavior for the cationic and anionic parts in this series. Magnetic measurements for the Dy analogue reveal single-molecule magnetism, which was rationalized by considering the effect of crystal-field splitting for both building units analyzed by electronic structure calculations.
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Affiliation(s)
- Yikun Zhu
- Department
of Chemistry, University at Albany, State
University of New York, Albany, New York 12222, United States
| | - James Mahoney
- Department
of Chemistry, University at Albany, State
University of New York, Albany, New York 12222, United States
| | - Aaron J. Babson
- Department
of Chemistry, University at Albany, State
University of New York, Albany, New York 12222, United States
| | - Zheng Zhou
- Department
of Chemistry, University at Albany, State
University of New York, Albany, New York 12222, United States
- Interdisciplinary
Materials Research Center, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China
| | - Zheng Wei
- Department
of Chemistry, University at Albany, State
University of New York, Albany, New York 12222, United States
| | - Miguel Gakiya-Teruya
- Department
of Chemistry and Biochemistry, Florida State
University, Tallahassee, Florida 32306, United States
| | - James McNeely
- Department
of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Andrey Yu. Rogachev
- Department
of Chemistry, Illinois Institute of Technology, Chicago, Illinois 60616, United States
| | - Michael Shatruk
- Department
of Chemistry and Biochemistry, Florida State
University, Tallahassee, Florida 32306, United States
| | - Marina A. Petrukhina
- Department
of Chemistry, University at Albany, State
University of New York, Albany, New York 12222, United States
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2
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Hauser A, Münzfeld L, Uhlmann C, Lebedkin S, Schlittenhardt S, Ruan TT, Kappes MM, Ruben M, Roesky PW. It's not just the size that matters: crystal engineering of lanthanide-based coordination polymers. Chem Sci 2024; 15:1338-1347. [PMID: 38274072 PMCID: PMC10806785 DOI: 10.1039/d3sc03746k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 12/05/2023] [Indexed: 01/27/2024] Open
Abstract
Synthesis and characterization of Lewis base free coordination polymers of selected lanthanides are presented. For this purpose, the substituted CotTIPS ligand (CotTIPS = 1,4-bis-triisopropylsilyl-cyclo-octatetraendiide) was used to synthesize homoleptic, anionic multidecker compounds of the type [K{LnIII(ɳ8-CotTIPS)2}]n. Depending on the solvent used for crystallization and the ionic radii of the lanthanide cations, three different categories of one-dimensional heterobimetallic coordination polymers were obtained in the solid state. For the early lanthanides La and Ce a unique helical conformation was obtained by crystallization from toluene, while the ionic radius of Pr seems to be a turning point towards the crystallization of zigzag polymers. For Er a third structural motif, a trapezoidal wave polymer was observed. Additionally, the zigzag polymer for all compounds could be obtained by changing the solvent from toluene to Et2O, reavealing a correlation between solid-state structure and ionic radii as well as solvent. While photoluminescence (PL) properties of Cot-lanthanide compounds are scarce, the La complexes show ligand centered green luminescence, whereas the Ce complexes reveal deep red emission origin from d-f transitions. The Er-compounds are single-molecule magnets, in which the magnetic relaxation of each Er ion occurs isolated from its neighbors at temperatures above 10 K, while below 9 K a strong antiferromagnetic coupling between the Er ions was seen.
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Affiliation(s)
- Adrian Hauser
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT) Engesserstraße 15 D-76131 Karlsruhe Germany
| | - Luca Münzfeld
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT) Engesserstraße 15 D-76131 Karlsruhe Germany
| | - Cedric Uhlmann
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT) Engesserstraße 15 D-76131 Karlsruhe Germany
| | - Sergei Lebedkin
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 D-76344 Eggenstein-Leopoldshafen Germany
| | - Sören Schlittenhardt
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 D-76344 Eggenstein-Leopoldshafen Germany
| | - Ting-Ting Ruan
- Institute of Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Manfred M Kappes
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 D-76344 Eggenstein-Leopoldshafen Germany
- Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 2 D-76131 Karlsruhe Germany
| | - Mario Ruben
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 D-76344 Eggenstein-Leopoldshafen Germany
- Centre Européen de Science Quantique (CESQ), Institut de Science et d'Ingénierie Supramoléculaires (ISIS, UMR 7006), CNRS-Université de Strasbourg 8 allée Gaspard Monge BP 70028 67083 Strasbourg Cedex France
- Institute of Quantum Materials and Technologies (IQMT), Karlsruhe Institute of Technology Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Peter W Roesky
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT) Engesserstraße 15 D-76131 Karlsruhe Germany
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3
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Price AN, Gupta AK, de Jong WA, Arnold PL. Tris(carbene)borates; alternatives to cyclopentadienyls in organolanthanide chemistry. Dalton Trans 2023; 52:5433-5437. [PMID: 37070223 PMCID: PMC10222825 DOI: 10.1039/d3dt00718a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
The chemistry of the tris-carbene anion phenyltris(3-alkyl-imidazoline-2-yliden-1-yl)borate, [C3Me]- ligand, is initiated for f-block metal cations. Neutral, molecular complexes of the form Ln(C3)2I are formed for cerium(III), while a separated ion pair [Ln(C3)2]I forms for ytterbium(III). DFT/QTAIM computational analyses of the complexes and related tridentate tris(pyrazolyl)borate (Tp) - supported analogs demonstrates the anticipated strength of the σ donation and confirms greater covalency in the metal-carbon bonds of the [C3Me]- complexes in comparison with those in the TpMe,Me complexes. The DFT calculations demonstrate the crucial role of THF solvent in accurately reproducing the contrasting molecular and ion-pair geometries observed experimentally for the Ce and Yb complexes.
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Affiliation(s)
- Amy N Price
- Chemical Sciences Division, Lawrence Berkeley National Laboratory Berkeley, CA 94720, USA.
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720-1460, USA
| | - Ankur K Gupta
- Applied Mathematics and Computational Science Division, Lawrence Berkeley National Laboratory Berkeley, CA 94720, USA
| | - Wibe A de Jong
- Applied Mathematics and Computational Science Division, Lawrence Berkeley National Laboratory Berkeley, CA 94720, USA
| | - Polly L Arnold
- Chemical Sciences Division, Lawrence Berkeley National Laboratory Berkeley, CA 94720, USA.
- Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720-1460, USA
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4
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Castellanos E, Demir S. Linear, Electron-Rich, Homoleptic Rare Earth Metallocene and Its Redox Activity. Inorg Chem 2023; 62:2095-2104. [PMID: 36689470 DOI: 10.1021/acs.inorgchem.2c03735] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The first homoleptic sandwich complex of dibenzocyclooctatetraene (dbCOT), representing a large cyclooctatetraene (COT) ligand with two fused benzene moieties, for any metal was accessed through salt metathesis of YCl3 with K2dbCOT in the presence of 2.2.2-cryptand. Single-crystal X-ray diffraction analysis on red-brown [K(crypt-222)][Y(dbCOT)2], 1, revealed a remarkably linear anionic yttrocene complex featuring a centroid-yttrium-centroid angle of 180.0°. The anionic moiety adopts a pseudo D2d geometry, where the carbon atoms of the central COT ring exhibit a staggered geometry. In total, 36 π-electrons are stored on both dbCOT anions, rendering it the largest isolated sandwich complex containing only fused aromatic rings. The solution-state structure of 1 was probed through a series of techniques involving cyclic voltammetry, UV-vis, and 1D and 2D nuclear magnetic resonance (NMR) spectroscopy, including 89Y NMR. The density functional theory (DFT) and natural bond orbital (NBO) analysis uncovered an ionic bonding interaction between the (dbCOT)2- ligands and YIII ion. NICS calculations support the experimentally observed aromatic character of 1, despite the deviation from planarity found in the dbCOT moieties. The cyclic voltammograms allude to the accessibility of a radical oxidation state, dbCOT3-•, based on a quasi-reversible feature. Excitingly, the chemical one-electron reduction of 1 through exposure to potassium graphite yielded a paramagnetic molecule, which was detected by electron paramagnetic resonance (EPR) techniques. Notably, this EPR spectrum is the first one for any sandwich complex containing a COT radical. Remarkably, 1 is thermally stable, and its isolation may provide access to mono- and multinuclear complexes comprising heavier metals with applications in small-molecule activation, single-molecule magnetism, and molecular nanowires.
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Affiliation(s)
- Ernesto Castellanos
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
| | - Selvan Demir
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48824, United States
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5
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Pugliese ER, Benner F, Castellanos E, Delano F, Demir S. Heteroleptic Rare-Earth Tris(metallocenes) Containing a Dibenzocyclooctatetraene Dianion. Inorg Chem 2022; 61:2444-2454. [PMID: 35042339 DOI: 10.1021/acs.inorgchem.1c03230] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Isolable heteroleptic tris(metallocenes) containing five-membered and larger rings remain extremely scarce. The utilization of tripositive rare-earth-metal ions with ionic radii >1 Å allowed access to unprecedented and sterically congested dibenzocyclooctatetraenyl (dbCOT) metallocenes, [K(crypt-222)][Cptet2RE(η2-dbCOT)] (RE = Y (1), Dy (2); Cptet = tetramethylcyclopentadienyl), through a salt metathesis reaction involving Cptet2RE(BPh4) and the potassium salt of the dbCOT dianion. The solid-state structures were investigated by single-crystal X-ray diffraction, magnetometry, and IR spectroscopy and provided evidence for the first crystallographically characterized (dbCOT)2- anion in a complex containing d- or f-block metals. Remarkably, the (Cptet)- ligands force a distortion from planarity within the (dbCOT)2- moiety, engendering a rare η2-bonding motif, as opposed to the classical η8 conformation observed in complexes bearing a (COT)2- ion. The η2 coordination mode was proven crystallographically between 100 and 298 K and computationally (DFT and NBO). Furthermore, nucleus independent chemical shift (NICS) calculations uncovered significant ring current within the dbCOT ligand. The solution-state properties of 1 and 2 were analyzed via cyclic voltammetry, NMR, and UV-vis spectroscopy. Cyclic voltammograms of 1 and 2 exhibit a quasi-reversible feature indicating the accessibility of complexes with dbCOT in two oxidation states (dbCOT2-/3-•). Importantly, the dysprosium congener, 2, is a zero-field single-molecule magnet (SMM).
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Affiliation(s)
- Elizabeth R Pugliese
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48823, United States
| | - Florian Benner
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48823, United States
| | - Ernesto Castellanos
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48823, United States
| | - Francis Delano
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48823, United States
| | - Selvan Demir
- Department of Chemistry, Michigan State University, 578 South Shaw Lane, East Lansing, Michigan 48823, United States
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6
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Straub MD, Ouellette ET, Boreen MA, Britt RD, Chakarawet K, Douair I, Gould CA, Maron L, Del Rosal I, Villarreal D, Minasian SG, Arnold J. A Uranium(II) Arene Complex That Acts as a Uranium(I) Synthon. J Am Chem Soc 2021; 143:19748-19760. [PMID: 34787416 DOI: 10.1021/jacs.1c07854] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two-electron reduction of the amidate-supported U(III) mono(arene) complex U(TDA)3 (2) with KC8 yields the anionic bis(arene) complex [K[2.2.2]cryptand][U(TDA)2] (3) (TDA = N-(2,6-di-isopropylphenyl)pivalamido). EPR spectroscopy, magnetic susceptibility measurements, and calculations using DFT as well as multireference CASSCF methods all provide strong evidence that the electronic structure of 3 is best represented as a 5f4 U(II) metal center bound to a monoreduced arene ligand. Reactivity studies show 3 reacts as a U(I) synthon by behaving as a two-electron reductant toward I2 to form the dinuclear U(III)-U(III) triiodide species [K[2.2.2]cryptand][(UI(TDA)2)2(μ-I)] (6) and as a three-electron reductant toward cycloheptatriene (CHT) to form the U(IV) complex [K[2.2.2]cryptand][U(η7-C7H7)(TDA)2(THF)] (7). The reaction of 3 with cyclooctatetraene (COT) generates a mixture of the U(III) anion [K[2.2.2]cryptand][U(TDA)4] (1-crypt) and U(COT)2, while the addition of COT to complex 2 instead yields the dinuclear U(IV)-U(IV) inverse sandwich complex [U(TDA)3]2(μ-η8:η3-C8H8) (8). Two-electron reduction of the homoleptic Th(IV) amidate complex Th(TDA)4 (4) with KC8 gives the mono(arene) complex [K[2.2.2]cryptand][Th(TDA)3(THF)] (5). The C-C bond lengths and torsion angles in the bound arene of 5 suggest a direduced arene bound to a Th(IV) metal center; this conclusion is supported by DFT calculations.
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Affiliation(s)
- Mark D Straub
- Department of Chemistry, University of California, Berkeley, California 94720, United States.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Erik T Ouellette
- Department of Chemistry, University of California, Berkeley, California 94720, United States.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Michael A Boreen
- Department of Chemistry, University of California, Berkeley, California 94720, United States.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - R David Britt
- Department of Chemistry, University of California─Davis, Davis, California 95616, United States
| | - Khetpakorn Chakarawet
- Department of Chemistry, University of California─Davis, Davis, California 95616, United States
| | - Iskander Douair
- Université de Toulouse et CNRS, INSA, UPS, UMR 5215, LPCNO 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Colin A Gould
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Laurent Maron
- Université de Toulouse et CNRS, INSA, UPS, UMR 5215, LPCNO 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Iker Del Rosal
- Université de Toulouse et CNRS, INSA, UPS, UMR 5215, LPCNO 135 Avenue de Rangueil, 31077 Toulouse, France
| | - David Villarreal
- Department of Chemistry, University of California─Davis, Davis, California 95616, United States
| | - Stefan G Minasian
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720, United States.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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7
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8
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Lukens WW, Booth CH, Walter MD. Experimental evaluation of the stabilization of the COT orbitals by 4f orbitals in COT 2Ce using a Hubbard model. Dalton Trans 2021; 50:2530-2535. [PMID: 33522542 DOI: 10.1039/d0dt03897k] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Significant orbital mixing is rare in lanthanide complexes because of the limited radial extent of the 4f orbitals, which results in a generally small stabilization due to 4f orbital interactions. Nevertheless, even a small amount of additional stabilization could enhance lanthanide separations. One lanthanide complex in which orbital mixing has been extensively studied both experimentally and computationally is cerocene, COT2Ce, where COT is cyclooctatetraene. This compound has a singlet ground state with a low-lying, triplet excited state. Previous fluorescence studies on trimethylsilyl-substituted cerocenes indicate the triplet state is 0.4 eV higher in energy than the singlet state. In addition, computational studies predict that the triplet is 0.3 to 1 eV higher in energy than the singlet. The synthesis of highly pure COT2Ce by Walter and Andersen allowed its physical properties to be accurately measured. Using these measurements, we evaluate the stabilization of the 4f orbitals using two, independent approaches. A Hubbard model is used to evaluate the stabilization of the ground state due to orbital mixing. This stabilization, which is also the singlet-triplet gap, is -0.29 eV using this model. This gap was also from the temperature independent paramagnetism of COT2Ce, which yielded a value of -0.32 eV.
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Affiliation(s)
- Wayne W Lukens
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
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9
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Moutet J, Schleinitz J, La Droitte L, Tricoire M, Pointillart F, Gendron F, Simler T, Clavaguéra C, Le Guennic B, Cador O, Nocton G. Bis‐Cyclooctatetraenyl Thulium(II): Highly Reducing Lanthanide Sandwich Single‐Molecule Magnets. Angew Chem Int Ed Engl 2021; 60:6042-6046. [DOI: 10.1002/anie.202015428] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Jules Moutet
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Jules Schleinitz
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Léo La Droitte
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Maxime Tricoire
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Fabrice Pointillart
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Frédéric Gendron
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Thomas Simler
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Carine Clavaguéra
- Université Paris-Saclay CNRS Institut de Chimie Physique UMR 8000 91405 Orsay cedex France
| | - Boris Le Guennic
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Olivier Cador
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Grégory Nocton
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
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10
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Moutet J, Schleinitz J, La Droitte L, Tricoire M, Pointillart F, Gendron F, Simler T, Clavaguéra C, Le Guennic B, Cador O, Nocton G. Bis‐Cyclooctatetraenyl Thulium(II): Highly Reducing Lanthanide Sandwich Single‐Molecule Magnets. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015428] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jules Moutet
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Jules Schleinitz
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Léo La Droitte
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Maxime Tricoire
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Fabrice Pointillart
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Frédéric Gendron
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Thomas Simler
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
| | - Carine Clavaguéra
- Université Paris-Saclay CNRS Institut de Chimie Physique UMR 8000 91405 Orsay cedex France
| | - Boris Le Guennic
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Olivier Cador
- Univ Rennes CNRS ISCR (Institut des Sciences Chimiques de Rennes)–UMR 6226 35000 Rennes France
| | - Grégory Nocton
- LCM CNRS Ecole polytechnique Institut Polytechnique Paris Route de Saclay 91128 Palaiseau, cedex France
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11
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Tsoureas N, Mansikkamäki A, Layfield RA. Synthesis, bonding properties and ether activation reactivity of cyclobutadienyl-ligated hybrid uranocenes. Chem Sci 2021; 12:2948-2954. [PMID: 34164062 PMCID: PMC8179396 DOI: 10.1039/d0sc05199c] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Accepted: 01/07/2021] [Indexed: 11/21/2022] Open
Abstract
A series of hybrid uranocenes consisting of uranium(iv) sandwiched between cyclobutadienyl (Cb) and cyclo-octatetraenyl (COT) ligands has been synthesized, structurally characterized and studied computationally. The dimetallic species [(η4-Cb'''')(η8-COT)U(μ:η2:η8-COT)U(THF)(η4-Cb'''')] (1) forms concomitantly with, and can be separated from, monometallic [(η4-Cb'''')U(THF)(η8-COT)] (2) (Cb'''' = 1,2,3,4-tetrakis(trimethylsilyl)cyclobutadienyl, COT = cyclo-octatetraenyl). In toluene solution at room temperature, 1 dissociates into 2 and the unsolvated uranocene [(η4-Cb'''')U(η8-COT)] (3). By applying a high vacuum, both 1 and 2 can be converted directly into 3. Using bulky silyl substituents on the COT ligand allowed isolation of base-free [(η4-Cb'''')U{η8-1,4-(iPr3Si)2C8H6}] (4), with compounds 3 and 4 being new members of the bis(annulene) family of actinocenes and the first to contain a cyclobutadienyl ligand. Computational studies show that the bonding in the hybrid uranocenes 3 and 4 has non-negligible covalency. New insight into actinocene bonding is provided by the complementary interactions of the different ligands with uranium, whereby the 6d orbitals interact most strongly with the cyclobutadienyl ligand and the 5f orbitals do so with the COT ligands. The redox-neutral activation of diethyl ether by [(η4-Cb'''')U(η8-C8H8)] is also described and represents a uranium-cyclobutadienyl cooperative process, potentially forming the basis of further small-molecule activation chemistry.
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Affiliation(s)
- Nikolaos Tsoureas
- Department of Chemistry, School of Life Sciences, University of Sussex Brighton BN1 9QJ UK
| | | | - Richard A Layfield
- Department of Chemistry, School of Life Sciences, University of Sussex Brighton BN1 9QJ UK
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12
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Zhu Y, Zhou Z, Wei Z, Petrukhina MA. Two-Fold Reduction of Dibenzo[a,e]cyclooctatetraene with Group 1 Metals: From Lithium to Cesium. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00688] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yikun Zhu
- Department of Chemistry, University at Albany, State University of New York, Albany, New York 12222, United States
| | - Zheng Zhou
- Department of Chemistry, University at Albany, State University of New York, Albany, New York 12222, United States
| | - Zheng Wei
- Department of Chemistry, University at Albany, State University of New York, Albany, New York 12222, United States
| | - Marina A. Petrukhina
- Department of Chemistry, University at Albany, State University of New York, Albany, New York 12222, United States
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13
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14
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Guo FS, Bar AK, Layfield RA. Main Group Chemistry at the Interface with Molecular Magnetism. Chem Rev 2019; 119:8479-8505. [PMID: 31059235 DOI: 10.1021/acs.chemrev.9b00103] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Innovative synthetic coordination and, increasingly, organometallic chemistry are at the heart of advances in molecular magnetism. Smart ligand design is essential for implementing controlled modifications to the electronic structure and magnetic properties of transition metal and f-element compounds, and many important recent developments use nontraditional ligands based on low-coordinate main group elements to drive the field forward. This review charts progress in molecular magnetism from the perspective of ligands in which the donor atoms range from low-coordinate 2p elements-particularly carbon but also boron and nitrogen-to the heavier p-block elements such as phosphorus, arsenic, antimony, and even bismuth. Emphasis is placed on the role played by novel main group ligands in addressing magnetic anisotropy of transition metal and f-element compounds, which underpins the development of single-molecule magnets (SMMs), a family of magnetic materials that can retain magnetization in the absence of a magnetic field below a blocking temperature. Nontraditional p-block donor atoms, with their relatively diffuse valence orbitals and more diverse bonding characteristics, also introduce scope for tuning the spin-orbit coupling properties and metal-ligand covalency in molecular magnets, which has implications in areas such as magnetic exchange coupling and spin crossover phenomena. The chemistry encompasses transition metals, lanthanides, and actinides and describes recently discovered molecular magnets that can be regarded, currently, as defining the state of the art. This review identifies that main group chemistry at the interface molecular magnetism is an area with huge potential to deliver new types of molecular magnets with previously unseen properties and applications.
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Affiliation(s)
- Fu-Sheng Guo
- Department of Chemistry, School of Life Sciences , University of Sussex , Brighton BN1 9QJ , United Kingdom
| | - Arun Kumar Bar
- Department of Chemistry, School of Life Sciences , University of Sussex , Brighton BN1 9QJ , United Kingdom
| | - Richard A Layfield
- Department of Chemistry, School of Life Sciences , University of Sussex , Brighton BN1 9QJ , United Kingdom
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15
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Abstract
Recent developments and results from the organometallic chemistry of the actinides are reviewed. In the last one and a half years the structural data of about 15 organometallic complexes of transuranium actinides (Np or Pu) have been published, all involving π-ligands in the coordination sphere of the metal ion. On the basis of these data, a comparison of these molecules is presented. Depending on the steric demands of the ligands, effects like the actinide contraction seem to be stronger or weaker in the structural features. This indicates that the interplay between the actinide ion and the π-ligand is rather flexible, enabling the formation of stable bonds over a broad range of actinide ion oxidation states.
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Affiliation(s)
- Olaf Walter
- European Commission–Joint Research CentreDirectorate for Nuclear Safety and Security–G. I. 5Postfach 234076125KarlsruheGermany
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16
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Huang Z, Tan G, Chen C, Zhang WX, Wang X, Xi Z. Selective reduction of 1,5-diazacyclooctatetraenes: synthesis and structures of aromatic diazacyclooctatetraenyl dianions and a 2,6-bipyrrolinyl dianionic Co( ii) complex. Chem Commun (Camb) 2019; 55:2648-2651. [DOI: 10.1039/c9cc00075e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The first structurally well-defined aromatic 1,5-diazacyclooctatetraenyl dianion and a 2,6-bipyrrolinyl dianionic Co(ii) complex were obtained selectively via reduction of 1,5-diazacyclooctatetraenes.
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Affiliation(s)
- Zhe Huang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Gengwen Tan
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- China
| | - Chao Chen
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- China
| | - Wen-Xiong Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
| | - Xinping Wang
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- China
| | - Zhenfeng Xi
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry
- Peking University
- Beijing 100871
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17
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Heras Ojea MJ, Maddock LCH, Layfield RA. Lanthanide Organometallics as Single-Molecule Magnets. TOP ORGANOMETAL CHEM 2019. [DOI: 10.1007/3418_2019_26] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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18
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Bar AK, Kalita P, Singh MK, Rajaraman G, Chandrasekhar V. Low-coordinate mononuclear lanthanide complexes as molecular nanomagnets. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.03.022] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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19
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Apostolidis C, Dutkiewicz MS, Kovács A, Walter O. Solid-State Structure of Tris-Cyclopentadienide Uranium(III) and Plutonium(III). Chemistry 2018; 24:2841-2844. [PMID: 29193373 PMCID: PMC5861669 DOI: 10.1002/chem.201704845] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Indexed: 11/08/2022]
Abstract
The organometallic tris-cyclopentadienide actinide(III) (AnCp3 ) complexes were first reported about 50 years ago. However, up until now, only the NpCp3 solid state structure has been studied. Here we report on the solid state structures of UCp3 and PuCp3 which are isostructural to the Np analogue. The structural models are supported by theoretical calculations and compared to their lanthanide analogues. The observed trends in changes of bond lengths might be indicator for an increased covalency in the bonding in the tris-cyclopentadienide actinide(III) complexes (AnCp3 ) compared to their lanthanide homologues.
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Affiliation(s)
- Christos Apostolidis
- European Commission–Joint Research CentreDirectorate for Nuclear Safety and Security–G.I.5, Postfach 234076125KarlsruheGermany
| | - Michał S. Dutkiewicz
- European Commission–Joint Research CentreDirectorate for Nuclear Safety and Security–G.I.5, Postfach 234076125KarlsruheGermany
- EaStCHEM School of ChemistryUniversity of Edinburgh, The King's BuildingsEdinburghEH9 3FJUK
| | - Attila Kovács
- European Commission–Joint Research CentreDirectorate for Nuclear Safety and Security–G.I.5, Postfach 234076125KarlsruheGermany
| | - Olaf Walter
- European Commission–Joint Research CentreDirectorate for Nuclear Safety and Security–G.I.5, Postfach 234076125KarlsruheGermany
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20
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Lorenz V, Liebing P, Rausch J, Blaurock S, Hrib CG, Hilfert L, Edelmann FT. Preparation and crystal structures of silyl-substituted potassium cyclooctatetraenides. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2017.08.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Braunschweig H, Damme A, Dück K, Krummenacher I, Paprocki V, Radacki K, Ramler J, Schiller C, Schneider C. Boryl- and Silyl-Substituted Mixed Sandwich Compounds of Scandium. Chemistry 2018; 24:2403-2409. [PMID: 29363206 DOI: 10.1002/chem.201704908] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Indexed: 11/10/2022]
Abstract
An improved, one-pot synthesis of the linear sandwich compound [Sc(η5 -C5 H5 )(η8 -C8 H8 )] is presented. The synthetic procedure is amenable to boryl- and silyl-substituted cyclopentadienyl and cyclooctatetraenyl ligands, thereby yielding the first functionalized derivatives. We found that the synthesis of the silyl-substituted mixed sandwich complexes produces higher yields when the ligand exchange is carried out stepwise, by isolating the intermediate trimethylsilylated half-sandwich complex [Sc(η8 -C8 H7 SiMe3 )Cl(THF)] (THF=tetrahydrofuran). The molecular structures of the parent complex, as well as of its mono-boryl-substituted derivatives, have been determined by single-crystal X-ray diffraction. In addition, the optical and electrochemical properties of the mixed sandwich complexes are reported.
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Affiliation(s)
- Holger Braunschweig
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Alexander Damme
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Klaus Dück
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ivo Krummenacher
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Valerie Paprocki
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Krzysztof Radacki
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Jacqueline Ramler
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Carl Schiller
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Christoph Schneider
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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22
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Lorenz V, Liebing P, Bathelier A, Engelhardt F, Maron L, Hilfert L, Busse S, Edelmann FT. The “Wanderlust” of Me3Si groups in rare-earth triple-decker complexes: a combined experimental and computational study. Chem Commun (Camb) 2018; 54:10280-10283. [DOI: 10.1039/c8cc05317k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The migration of Me3Si groups (“Wanderlust”) in rare-earth triple-decker sandwich complexes of the type Ln2(COT′′)3 (COT′′ = bis(trimethylsilyl)cyclooctatetraenyl) has been elucidated by a combined experimental and computational study.
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Affiliation(s)
- Volker Lorenz
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Phil Liebing
- ETH Zürich
- Laboratorium für Anorganische Chemie
- 8093 Zürich
- Switzerland
| | - Adrien Bathelier
- Université de Toulouse
- INSA
- UPS
- CNRS-UMR5215
- LPCNO Avenue de Rangueil 135
| | - Felix Engelhardt
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Laurent Maron
- Université de Toulouse
- INSA
- UPS
- CNRS-UMR5215
- LPCNO Avenue de Rangueil 135
| | - Liane Hilfert
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Sabine Busse
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
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23
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Sroor FM, Vendier L, Etienne M. Cyclooctatetraenyl calcium and strontium amido complexes. Dalton Trans 2018; 47:12587-12595. [DOI: 10.1039/c8dt02257g] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The first examples of Ca and Sr amido complexes built on a cyclooctatetraenyl platform are reported.
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24
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Lorenz V, Liebing P, Böhme M, Buchholz A, Plass W, Geue N, Hilfert L, Busse S, Engelhardt F, Hrib CG, Edelmann FT. Lanthanide(III) Sandwich and Half‐Sandwich Complexes with Bulky Cyclooctatetraenyl Ligands: Synthesis, Structures, and Magnetic Properties. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700878] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Volker Lorenz
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Phil Liebing
- Laboratorium für Anorganische Chemie ETH Zürich Vladimir‐Prelog‐Weg 1–5/10 8093 Zürich Switzerland
| | - Michael Böhme
- Lehrstuhl für Anorganische Chemie II Friedrich‐Schiller‐Universität Jena 07743 Jena Germany
| | - Axel Buchholz
- Lehrstuhl für Anorganische Chemie II Friedrich‐Schiller‐Universität Jena 07743 Jena Germany
| | - Winfried Plass
- Lehrstuhl für Anorganische Chemie II Friedrich‐Schiller‐Universität Jena 07743 Jena Germany
| | - Niklas Geue
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Liane Hilfert
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Sabine Busse
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Felix Engelhardt
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Cristian G. Hrib
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg 39106 Magdeburg Germany
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25
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Abstract
Fifty years have passed since the foundation of organometallic neptunium chemistry, and yet only a handful of complexes have been reported, and even fewer have been fully characterized. Yet, increasingly, combined synthetic/spectroscopic/computational studies are demonstrating how covalently bonding, soft, carbocyclic organometallic ligands provide an excellent platform for advancing the fundamental understanding of the differences in orbital contributions and covalency in f-block metal-ligand bonding. Understanding the subtleties is the key to the safe handling and separations of the highly radioactive nuclei. This review describes the complexes that have been synthesized to date and presents a critical assessment of the successes and difficulties in their analysis and the bonding information they have provided. Because of increasing recent efforts to start new Np-capable air-sensitive inorganic chemistry laboratories, the importance of radioactivity, the basics of Np decay and its ramifications (including the radiochemical synthesis of one organometallic compound), and the available anhydrous starting materials are also surveyed. The review also highlights a range of instances in which important differences in the chemical behavior between Np and its closest neighbors, uranium and plutonium, are found.
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Affiliation(s)
- Polly L Arnold
- EaStCHEM School of Chemistry, University of Edinburgh , The King's Buildings, Edinburgh, EH9 3FJ, U.K
| | - Michał S Dutkiewicz
- EaStCHEM School of Chemistry, University of Edinburgh , The King's Buildings, Edinburgh, EH9 3FJ, U.K.,European Commission, DG Joint Research Centre, Directorate G-Nuclear Safety and Security, Advanced Nuclear Knowledge-G.I.5, Postfach 2340, D-76125, Karlsruhe, Germany
| | - Olaf Walter
- European Commission, DG Joint Research Centre, Directorate G-Nuclear Safety and Security, Advanced Nuclear Knowledge-G.I.5, Postfach 2340, D-76125, Karlsruhe, Germany
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26
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Harriman KLM, Korobkov I, Murugesu M. From a Piano Stool to a Sandwich: A Stepwise Route for Improving the Slow Magnetic Relaxation Properties of Thulium. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00449] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Katie L. M. Harriman
- Department
of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Ilia Korobkov
- Department
of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Muralee Murugesu
- Department
of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
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27
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Rausch J, Liebing P, Lorenz V, Hilfert L, Busse S, Maichle-Mössmer C, Edelmann FT. Scandium-Mediated Formation of a Bis(tetrahydropentalene). Angew Chem Int Ed Engl 2017; 56:7238-7241. [PMID: 28510295 DOI: 10.1002/anie.201703362] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Indexed: 11/10/2022]
Abstract
The reactivity of Li[Sc(COT'')2 ] (1; COT''=1,4-bis(trimethylsilyl)cyclooctatetraenyl) towards CoCl2 is considerably different from that of related lanthanide triple-decker sandwich complexes. In addition to the expected triple-decker complex Sc2 (COT'')3 (2), the complex Sc2 {μ-BTHP}(COT'')2 (3) is formed, which comprises the novel BTHP2- ligand (BTHP2- =bis(3,5-bis(trimethylsilyl)-1,3a,6,6a-tetrahydropentalene-1-yl)diide or bis(2,7-bis(trimethylsilyl)bicyclo[3.3.0]octa-2,7-dien-4-yl)diide, C16 H10 (SiMe3 )42- ). The formation of 3 is likely facilitated by the fact that scandium prefers η8 ,η3 coordination rather than highly symmetric η8 ,η8 coordination, and the η3 -coordinated COT'' ligand in 1 is activated owing to a loss of aromaticity. Acid hydrolysis of 3 leads to air-stable H2 BTHP (4).
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Affiliation(s)
- Janek Rausch
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Phil Liebing
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Volker Lorenz
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Liane Hilfert
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Sabine Busse
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Caecilia Maichle-Mössmer
- Institut für Anorganische Chemie, Eberhard-Karls-Universität Tübingen, Auf der Morgenstelle 18, 7, 2076, Tübingen, Germany
| | - Frank T Edelmann
- Chemisches Institut der, Otto-von-Guericke-Universität, Universitätsplatz 2, 39106, Magdeburg, Germany
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28
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Kawasaki K, Sugiyama R, Tsuji T, Iwasa T, Tsunoyama H, Mizuhata Y, Tokitoh N, Nakajima A. A designer ligand field for blue-green luminescence of organoeuropium(ii) sandwich complexes with cyclononatetraenyl ligands. Chem Commun (Camb) 2017; 53:6557-6560. [PMID: 28524187 DOI: 10.1039/c7cc03045b] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel η9-coordinated double-decker sandwich complex of divalent europium is synthesized. The complex exhibits blue-green photoluminescence at 516 nm, which is significantly blue-shifted from those of other organoeuropium(ii) sandwich complexes (∼630 nm). The blue-shift was quantitatively explained by the weakened electrostatic field of the expanded 10-π ring.
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Affiliation(s)
- Kenshiro Kawasaki
- Department of Chemistry, Faculty of Science and Technology, Keio University, Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
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29
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Rausch J, Liebing P, Lorenz V, Hilfert L, Busse S, Maichle-Mössmer C, Edelmann FT. Scandium-Mediated Formation of a Bis(tetrahydropentalene). Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201703362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Janek Rausch
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
| | - Phil Liebing
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
| | - Volker Lorenz
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
| | - Liane Hilfert
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
| | - Sabine Busse
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
| | - Caecilia Maichle-Mössmer
- Institut für Anorganische Chemie; Eberhard-Karls-Universität Tübingen; Auf der Morgenstelle 18, 7 2076 Tübingen Germany
| | - Frank T. Edelmann
- Chemisches Institut der; Otto-von-Guericke-Universität; Universitätsplatz 2 39106 Magdeburg Germany
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30
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Apostolidis C, Walter O, Vogt J, Liebing P, Maron L, Edelmann FT. A Structurally Characterized Organometallic Plutonium(IV) Complex. Angew Chem Int Ed Engl 2017; 56:5066-5070. [PMID: 28371148 PMCID: PMC5485009 DOI: 10.1002/anie.201701858] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Indexed: 11/06/2022]
Abstract
The blood-red plutonocene complex Pu(1,3-COT'')(1,4-COT'') (4; COT''=η8 -bis(trimethylsilyl)cyclooctatetraenyl) has been synthesized by oxidation of the anionic sandwich complex Li[Pu(1,4-COT'')2 ] (3) with anhydrous cobalt(II) chloride. The first crystal structure determination of an organoplutonium(IV) complex revealed an asymmetric sandwich structure for 4 where one COT'' ring is 1,3-substituted while the other retains the original 1,4-substitution pattern. The electronic structure of 4 has been elucidated by a computational study, revealing a probable cause for the unexpected silyl group migration.
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Affiliation(s)
- Christos Apostolidis
- European Commission, Joint Research Centre, Directorate G-Nuclear Safety and Security, P.O. Box 2340, 76125, Karlsruhe, Germany
| | - Olaf Walter
- European Commission, Joint Research Centre, Directorate G-Nuclear Safety and Security, P.O. Box 2340, 76125, Karlsruhe, Germany
| | - Jochen Vogt
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Phil Liebing
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Laurent Maron
- Laboratoire de Physique et Chimie des Nanoobjets (LPCNO), Université de Toulouse/INSA/CNRS (UMR5215), 135 avenue de Rangueil, 31077, Toulouse cedex 4, France
| | - Frank T Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
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31
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Apostolidis C, Walter O, Vogt J, Liebing P, Maron L, Edelmann FT. A Structurally Characterized Organometallic Plutonium(IV) Complex. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701858] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Christos Apostolidis
- European Commission, Joint Research Centre, Directorate G-Nuclear Safety and Security; P.O. Box 2340 76125 Karlsruhe Germany
| | - Olaf Walter
- European Commission, Joint Research Centre, Directorate G-Nuclear Safety and Security; P.O. Box 2340 76125 Karlsruhe Germany
| | - Jochen Vogt
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg; Universitätsplatz 2 39106 Magdeburg Germany
| | - Phil Liebing
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg; Universitätsplatz 2 39106 Magdeburg Germany
| | - Laurent Maron
- Laboratoire de Physique et Chimie des Nanoobjets (LPCNO); Université de Toulouse/INSA/CNRS (UMR5215); 135 avenue de Rangueil 31077 Toulouse cedex 4 France
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg; Universitätsplatz 2 39106 Magdeburg Germany
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Edelmann FT. Lanthanides and actinides: Annual survey of their organometallic chemistry covering the year 2015. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.04.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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