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Grödler D, Sperling JM, Rotermund BM, Scheibe B, Beck NB, Mathur S, Albrecht-Schönzart TE. Neptunium Alkoxide Chemistry: Expanding Alkoxides to the Transuranium Elements. Inorg Chem 2023; 62:2513-2517. [PMID: 36705531 DOI: 10.1021/acs.inorgchem.2c04338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Two oxo-containing neptunium(IV) tert-butoxides, [Np3O(OtBu)10] (1) and [K4Np2O(OtBu)10] (2), were synthesized using the ligand substitution between neptunium(IV) silylamides and HOtBu, whereas the salt metathesis between [NpCl4(DME)2] (DME = dimethoxyethane) and various amounts of LiOtBu resulted in the formation of oxo-free alkoxides [Np(OtBu)4(py)2] (3; py = pyridine) and [Li(THF)]2[Np(OtBu)6] (4; THF = tetrahydrofuran). These complexes are the first structurally characterized neptunium(IV) alkoxides using single-crystal X-ray diffraction and solid-state absorption spectroscopy, which provide data for the development of anhydrous metal-organic neptunium chemistry.
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Affiliation(s)
- Dennis Grödler
- Department of Chemistry, Institute for Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Joseph M Sperling
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Brian M Rotermund
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Benjamin Scheibe
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Nicholas B Beck
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Sanjay Mathur
- Department of Chemistry, Institute for Inorganic Chemistry, University of Cologne, Greinstrasse 6, 50939 Cologne, Germany
| | - Thomas E Albrecht-Schönzart
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
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2
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Kawakami T, Tamaki S, Shirase S, Tsurugi H, Mashima K. Syntheses and Redox Properties of Carboxylate-Ligated Hexanuclear Ce(IV) Clusters and Their Photoinduced Homolysis of the Ce(IV)–Ligand Covalent Bond. Inorg Chem 2022; 61:20461-20471. [DOI: 10.1021/acs.inorgchem.2c03163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Tomomi Kawakami
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Sota Tamaki
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Satoru Shirase
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kazushi Mashima
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Osaka 565-0871, Japan
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3
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Werner D, Deacon G, Junk PC. Serendipitous Formation of a Cerium(IV)‐Mercury(II) Separated Ion Coordination Polymer. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | | | - Peter Courtney Junk
- James Cook University Dept. of Chemistry James Cook Drive 4811 Townsville AUSTRALIA
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4
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Abstract
The number of rare earth (RE) starting materials used in synthesis is staggering, ranging from simple binary metal-halide salts to borohydrides and "designer reagents" such as alkyl and organoaluminate complexes. This review collates the most important starting materials used in RE synthetic chemistry, including essential information on their preparations and uses in modern synthetic methodologies. The review is divided by starting material category and supporting ligands (i.e., metals as synthetic precursors, halides, borohydrides, nitrogen donors, oxygen donors, triflates, and organometallic reagents), and in each section relevant synthetic methodologies and applications are discussed.
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Affiliation(s)
- Fabrizio Ortu
- School of Chemistry, University of Leicester, LE1 7RH Leicester, U.K.
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5
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Raauf A, Schläfer J, Gessner I, Lichtenberg A, Zegke M, Fischer T, Mathur S. Homo- and heteroleptic lanthanide-iron alkoxides as precursors in materials synthesis. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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6
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Zhu Q, Fettinger JC, Power PP. Hydrostannylation of carbon dioxide by a hydridostannylene molybdenum complex. Dalton Trans 2021; 50:12555-12562. [PMID: 34545896 DOI: 10.1039/d1dt02473f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reaction of the aryltin(II) hydrides {AriPr4Sn(μ-H)}2 or {AriPr6Sn(μ-H)}2 (AriPr4 = -C6H3-2,6-(C6H3-2,6-iPr2)2, AriPr6 = -C6H3-2,6-(C6H2-2,4,6-iPr3)2) with two equivalents of the molybdenum carbonyl [Mo(CO)5(THF)] afforded the divalent tin hydride transition metal complexes, Mo(CO)5{Sn(AriPr6)H}, (1), or Mo(CO)5{Sn(AriPr4)(THF)H} (2), respectively. Complex 1 effects the facile hydrostannylation of carbon dioxide, to yield Mo(CO)5{Sn(AriPr6)(κ2-O,O'-O2CH)}, (3), which features a bidentate formate ligand coordinating the tin atom. Reaction of 3 with the pinacolborane, HBpin (pin = pinacolato) in benzene regenerated 1 in quantitative yield. All complexes were characterized by X-ray crystallography, as well as UV-visible, IR, and multinuclear NMR spectroscopies. The isolation of 1 and 2 is consistent with the existence of monomeric forms of {AriPr4Sn(μ-H)}2 and {AriPr6Sn(μ-H)}2 in solution. Regeneration of 1 from 3via reaction with pinacolborane as the hydrogen source shows the catalytic potential of 1 in the hydrogenation of CO2.
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Affiliation(s)
- Qihao Zhu
- Department of Chemistry, University of California, Davis, California 95616, USA.
| | - James C Fettinger
- Department of Chemistry, University of California, Davis, California 95616, USA.
| | - Philip P Power
- Department of Chemistry, University of California, Davis, California 95616, USA.
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7
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Nahrstedt V, Raauf A, Hegemann C, Brune V, Schläfer J, Mathur S. Unusual Reactivity of Silicon Grease Towards Metal Alkoxides: Serendipity for Structural Chemistry. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202000474] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Vanessa Nahrstedt
- Institute of Inorganic Chemistry University of Cologne Greinstrasse 6 D-50939 Cologne Germany
| | - Aida Raauf
- Institute of Inorganic Chemistry University of Cologne Greinstrasse 6 D-50939 Cologne Germany
| | - Corinna Hegemann
- Institute of Inorganic Chemistry University of Cologne Greinstrasse 6 D-50939 Cologne Germany
| | - Veronika Brune
- Institute of Inorganic Chemistry University of Cologne Greinstrasse 6 D-50939 Cologne Germany
| | - Johannes Schläfer
- Institute of Inorganic Chemistry University of Cologne Greinstrasse 6 D-50939 Cologne Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry University of Cologne Greinstrasse 6 D-50939 Cologne Germany
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8
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Nahrstedt V, Stadler D, Fischer T, Duchoň T, Mueller DN, Schneider CM, Mathur S. Molecular Level Synthesis of InFeO 3 and InFeO 3/Fe 2O 3 Nanocomposites. Inorg Chem 2021; 60:3719-3728. [PMID: 33621076 DOI: 10.1021/acs.inorgchem.0c03425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New heterometallic In-Fe alkoxides [InFe(OtBu)4(PyTFP)2] (1), [InFe2(OneoPen)9(Py)] (2), and [InFe3(OneoPen)12] (3) were synthesized and structurally characterized. The arrangement of metal centers in mixed-metal framework was governed by the In:Fe ratio and the coordination preferences of Fe(III) and In(III) centers to be in tetrahedral and octahedral environments, respectively. 3 displayed a star-shaped so-called "Mitsubishi" motif with the central In atom coordinated with three tetrahedral {Fe(OneoPen)4}- anionic units. The deterministic structural influence of the larger In atom was evident in 1 and 2 which displayed the coordination of neutral coligands to achieve the desired coordination number. Thermal decomposition studies of compounds 1-3 under inert conditions with subsequent powder diffraction studies revealed the formation of Fe2O3 and In2O3 in the case of 3 and 2, whereas 1 intriguingly produced elemental In and Fe. In contrary, the thermal decomposition of 1-3 under ambient conditions produced a ternary oxide, InFeO3, with additional Fe2O3 present as a secondary phase in a different stoichiometric ratio predetermined through the In:Fe ratio in 2 and 3. The intimate mixing of different phases in InFeO3/Fe2O3 nanocomposites was confirmed by transmission electron microscopy of solid residues obtained after the decomposition of 1 and 2. The pure InFeO3 particles demonstrated ferromagnetic anomalies around 170 K as determined by temperature-dependent field-cooled and zero-field-cooled magnetization experiments. A first-order magnetic transition with an increase in the ZFC measurements was explained by temperature-induced reduction of the Fe-Fe distance and the corresponding increase in superexchange.
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Affiliation(s)
- Vanessa Nahrstedt
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
| | - Daniel Stadler
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
| | - Thomas Fischer
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
| | - Tomáš Duchoň
- PGI-6, Research Centre, Juelich GmbH, Leo-Brandt-Str., 52428 Juelich, Germany
| | - David N Mueller
- PGI-6, Research Centre, Juelich GmbH, Leo-Brandt-Str., 52428 Juelich, Germany
| | - Claus M Schneider
- PGI-6, Research Centre, Juelich GmbH, Leo-Brandt-Str., 52428 Juelich, Germany
| | - Sanjay Mathur
- Institute of Inorganic Chemistry, University of Cologne, Greinstr. 6, 50939 Cologne, Germany
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9
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Hay MA, Boskovic C. Lanthanoid Complexes as Molecular Materials: The Redox Approach. Chemistry 2021; 27:3608-3637. [PMID: 32965741 DOI: 10.1002/chem.202003761] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Indexed: 11/05/2022]
Abstract
The development of molecular materials with novel functionality offers promise for technological innovation. Switchable molecules that incorporate redox-active components are enticing candidate compounds due to their potential for electronic manipulation. Lanthanoid metals are most prevalent in their trivalent state and usually redox-activity in lanthanoid complexes is restricted to the ligand. The unique electronic and physical properties of lanthanoid ions have been exploited for various applications, including in magnetic and luminescent materials as well as in catalysis. Lanthanoid complexes are also promising for applications reliant on switchability, where the physical properties can be modulated by varying the oxidation state of a coordinated ligand. Lanthanoid-based redox activity is also possible, encompassing both divalent and tetravalent metal oxidation states. Thus, utilization of redox-active lanthanoid metals offers an attractive opportunity to further expand the capabilities of molecular materials. This review surveys both ligand and lanthanoid centered redox-activity in pre-existing molecular systems, including tuning of lanthanoid magnetic and photophysical properties by modulating the redox states of coordinated ligands. Ultimately the combination of redox-activity at both ligands and metal centers in the same molecule can afford novel electronic structures and physical properties, including multiconfigurational electronic states and valence tautomerism. Further targeted exploration of these features is clearly warranted, both to enhance understanding of the underlying fundamental chemistry, and for the generation of a potentially important new class of molecular material.
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Affiliation(s)
- Moya A Hay
- School of Chemistry, University of Melbourne, Victoria, 3010, Australia
| | - Colette Boskovic
- School of Chemistry, University of Melbourne, Victoria, 3010, Australia
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10
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Octanuclear heterometallic FeIII-CeIV pivalate clusters: From a close {Fe4Ce4(μ4-O)4} cage to an open {Fe4Ce4(μ4-O)2(μ3-O)2} core. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.120038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Tsurugi H, Ikeda Y, Shinohara K, Shirase S, Toya N, Tanaka S, Mashima K. Synthesis and Characterization of Alkoxide-Bridged Heterometallic Clusters of Cerium and Copper. Inorg Chem 2019; 58:12565-12572. [DOI: 10.1021/acs.inorgchem.9b01213] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Yuri Ikeda
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Koichi Shinohara
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Satoru Shirase
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Nozomi Toya
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Shinji Tanaka
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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12
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Assefa MK, Wu G, Hayton TW. Synthesis of a terminal Ce(iv) oxo complex by photolysis of a Ce(iii) nitrate complex. Chem Sci 2017; 8:7873-7878. [PMID: 29163924 PMCID: PMC5674170 DOI: 10.1039/c7sc03715e] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 09/27/2017] [Indexed: 01/20/2023] Open
Abstract
Reaction of [Ce(NR2)3] (R = SiMe3) with LiNO3 in THF, in the presence of 2,2,2-cryptand, results in the formation of the Ce(iii) "ate" complex, [Li(2,2,2-cryptand)][Ce(κ2-O2NO)(NR2)3] (1) in 38% yield. Photolysis of 1 at 380 nm affords [Li(2,2,2-cryptand)][Ce(O)(NR2)3] (2), in 33% isolated yield after reaction work-up. Complex 2 is the first reported example of a Ce(iv) oxo complex where the oxo ligand is not supported by hydrogen bonding or alkali metal coordination. Also formed during photolysis are [Li(2,2,2-cryptand)]2[(μ3-O){Ce(μ-O)(NR2)2}3] (3) and [Li(2,2,2-cryptand)][Ce(OSiMe3)(NR2)3] (4). Their identities were confirmed by X-ray crystallography. Complex 4 can also be prepared via reaction of [Ce(NR2)3] with LiOSiMe3 in THF, in the presence of 2,2,2-cryptand. When synthesized in this fashion, 4 can be isolated in 47% yield. To rationalize the presence of 2, 3, and 4 in the reaction mixture, we propose that photolysis of 1 first generates 2 and NO2, via homolytic cleavage of the N-O bond in its nitrate co-ligand. Complex 2 then undergoes decomposition via two separate routes: (1) ligand scrambling and oligomerization to form 3; and, (2) abstraction of a trimethylsilyl cation to form a transient Ce(iv) silyloxide, [CeIV(OSiMe3)(NR2)3], followed by 1e- reduction to form 4. Alternatively, complex 4 could form directly via ·SiMe3 abstraction by 2.
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Affiliation(s)
- Mikiyas K Assefa
- Department of Chemistry and Biochemistry , University of California Santa Barbara , Santa Barbara , CA 93106 , USA .
| | - Guang Wu
- Department of Chemistry and Biochemistry , University of California Santa Barbara , Santa Barbara , CA 93106 , USA .
| | - Trevor W Hayton
- Department of Chemistry and Biochemistry , University of California Santa Barbara , Santa Barbara , CA 93106 , USA .
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13
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Friedrich J, Schneider D, Bock L, Maichle-Mössmer C, Anwander R. Cerium(IV) Neopentoxide Complexes. Inorg Chem 2017; 56:8114-8127. [DOI: 10.1021/acs.inorgchem.7b00828] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jochen Friedrich
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - David Schneider
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Lorenz Bock
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Cäcilia Maichle-Mössmer
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie; Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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15
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Schneider D, Harmgarth N, Edelmann FT, Anwander R. Ceric Cyclopentadienides Bearing Alkoxy, Aryloxy, Chlorido, or Iodido Co-Ligands. Chemistry 2017; 23:12243-12252. [PMID: 28334455 DOI: 10.1002/chem.201700743] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Indexed: 12/23/2022]
Abstract
A series of heteroleptic tris(cyclopentadienyl) CeIV complexes has been isolated and crystallographically characterized, revealing the broad accessibility of such organocerium(IV) compounds. The oxidation of complexes CpMe3 Ce(thf) and Cp'3 Ce(thf) (CpMe =C5 H4 Me, Cp'=C5 H4 SiMe3 ), bearing monosubstituted electron-poor cyclopentadienyl ligands, with 0.5 equivalents of 1,4-benzoquinone or C2 Cl6 gave the cerium(IV) hydroquinolate complexes CpMe3 Ce(OC6 H4 O)CeCpMe3 and Cp'3 Ce(OC6 H4 O)CeCp'3 , or the chloride complexes CpMe3 CeCl and Cp'3 CeCl, respectively; the iodide complex Cp'3 CeI was obtained from the reaction of Cp'3 Ce(thf) with elemental iodine. The behavior of Cp'3 CeCl in salt metathesis protocols employing alkali metal amides or alkyl, alkoxide, and aryloxide reagents was investigated, which gave rise to the robust and isolable cerium(IV) alkoxide Cp'3 Ce(OtBu). Trivalent [Cp'2 CeCl]2 was synthesized by AlMe4 →Cl exchange utilizing Cp'2 Ce(AlMe4 ) and AlMe2 Cl. The reactivity of [Cp'2 CeCl]2 towards the oxidants Ph3 CCl, C2 Cl6 , 1,4-benzoquinone, and I2 has been assessed, and has provided useful information on CeIII /CeIV redox deactivation pathways. In addition to X-ray structure analysis, all the complexes were characterized by NMR, DRIFT (diffuse reflectance IR Fourier transform), and UV/Vis spectroscopy as well as elemental analysis. The tetravalent compounds were further analyzed for their magnetic susceptibility by using Evans' method.
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Affiliation(s)
- David Schneider
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
| | - Nicole Harmgarth
- Institut für Chemie, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Frank T Edelmann
- Institut für Chemie, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106, Magdeburg, Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
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16
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Affiliation(s)
- Tim Heidemann
- Department of Chemistry, Institute of Inorganic Chemistry, Greinstrasse 6, 50939 Cologne, Germany
| | - Sanjay Mathur
- Department of Chemistry, Institute of Inorganic Chemistry, Greinstrasse 6, 50939 Cologne, Germany
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17
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Schläfer J, Graf D, Fornalczyk G, Mettenbörger A, Mathur S. Fluorinated Cerium(IV) Enaminolates: Alternative Precursors for Chemical Vapor Deposition of CeO2 Thin Films. Inorg Chem 2016; 55:5422-9. [DOI: 10.1021/acs.inorgchem.6b00348] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Schläfer
- Institute of Inorganic Chemistry, University of Cologne Greinstraße
6, D-50939 Cologne, Germany
| | - D. Graf
- Institute of Inorganic Chemistry, University of Cologne Greinstraße
6, D-50939 Cologne, Germany
| | - G. Fornalczyk
- Institute of Inorganic Chemistry, University of Cologne Greinstraße
6, D-50939 Cologne, Germany
| | - A. Mettenbörger
- Institute of Inorganic Chemistry, University of Cologne Greinstraße
6, D-50939 Cologne, Germany
| | - S. Mathur
- Institute of Inorganic Chemistry, University of Cologne Greinstraße
6, D-50939 Cologne, Germany
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18
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Kitschke P, Mertens L, Rüffer T, Lang H, Auer AA, Mehring M. From a Germylene to an “Inorganic Adamantane”: [{Ge
4
(μ‐O)
2
(μ‐OH)
4
}{W(CO)
5
}
4
]·4THF. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500761] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Philipp Kitschke
- Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Professur Koordinationschemie, Straße der Nationen 62, 09111 Chemnitz, Germany http://www.tu‐chemnitz.de/chemie/koord/
| | - Lutz Mertens
- Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Professur Koordinationschemie, Straße der Nationen 62, 09111 Chemnitz, Germany http://www.tu‐chemnitz.de/chemie/koord/
| | - Tobias Rüffer
- Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Professur Anorganische Chemie, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Heinrich Lang
- Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Professur Anorganische Chemie, Straße der Nationen 62, 09111 Chemnitz, Germany
| | - Alexander A. Auer
- Max‐Planck‐Institut für chemische Energiekonversion, Stiftsstraße 34–36, 45470 Mülheim an der Ruhr, Germany
| | - Michael Mehring
- Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Professur Koordinationschemie, Straße der Nationen 62, 09111 Chemnitz, Germany http://www.tu‐chemnitz.de/chemie/koord/
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19
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Williams UJ, Schneider D, Dorfner WL, Maichle-Mössmer C, Carroll PJ, Anwander R, Schelter EJ. Variation of electronic transitions and reduction potentials of cerium(IV) complexes. Dalton Trans 2015; 43:16197-206. [PMID: 25148646 DOI: 10.1039/c4dt01386g] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The trivalent compound K[Ce[N(SiHMe2)2]4] was synthesized and oxidized, providing a convenient route to the reported cerium(IV) compound Ce[N(SiHMe2)2]4. Protonolysis reactions of Ce[N(SiHMe2)2]4 with tert-butanol, substituted benzyl alcohols, and 2,6-diphenylphenol yielded the neutral tetravalent compounds Ce(O(t)Bu)4(py)2, Ce2(OCH2C6R5)8(thf)2 (R = Me, F), and Ce(Odpp)4 (dpp = 2,6-(C6H5)2-C6H3). Spectroscopic and electrochemical characterization of the monometallic cerium(IV) silylamide, alkoxide, and aryloxide compounds revealed variable ligand-to-metal charge transfer transitions and metal-based reduction potentials. Computational bonding analyses were performed to complement the physical characterization of the complexes.
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Affiliation(s)
- Ursula J Williams
- P. Roy and Diana T. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, USA.
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Schneider D, Spallek T, Maichle-Mössmer C, Törnroos KW, Anwander R. Cerium tetrakis(diisopropylamide)--a useful precursor for cerium(IV) chemistry. Chem Commun (Camb) 2015; 50:14763-6. [PMID: 25317924 DOI: 10.1039/c4cc06228k] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Homoleptic cerium(IV) diisopropylamide was synthesized via oxidation of ate complex Ce(NiPr2)4Li(thf) with trityl chloride or hexachloroethane. Due to its ready accessibility, and high pKa value of the proligand HNiPr2, Ce(NiPr2)4 features a promising candidate for protonolysis reactions, as shown for the synthesis of dimeric cerium(IV) tetrakis(1,1,3,3-N,N,N',N'-tetramethylguanidinate).
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Affiliation(s)
- David Schneider
- Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
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Kim JE, Carroll PJ, Schelter EJ. Bidentate nitroxide ligands stable toward oxidative redox cycling and their complexes with cerium and lanthanum. Chem Commun (Camb) 2015; 51:15047-50. [DOI: 10.1039/c5cc06052d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A redox non-innocent bidentate nitroxide ligand stabilizes a tetravalent cerium cation and subsequently an electron–hole upon the oxidation on the electrochemical time scale.
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Affiliation(s)
- Jee Eon Kim
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos Laboratories
- Department of Chemistry
- University of Pennsylvania
- Philadelphia
- USA
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22
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Bakthavachalam K, Yuvaraj K, Mondal B, Prakash R, Ghosh S. All-metallagermoxane with an adamantanoid cage structure: [(Cp*Ru(CO)2Ge)4(μ-O)6] (Cp* = η5-C5Me5). Dalton Trans 2015; 44:17920-3. [DOI: 10.1039/c5dt03284a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The first tetrametallagermoxane [(Cp*Ru(CO)2Ge)4(μ-O)6], with an adamantanoid cage structure, has been synthesized and structurally characterized with an exo-{Cp*Ru(CO)2} fragment in each germanium atom.
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Affiliation(s)
| | - K. Yuvaraj
- Indian Institute of Technology Madras
- Chennai
- India
| | - Bijan Mondal
- Indian Institute of Technology Madras
- Chennai
- India
| | - Rini Prakash
- Indian Institute of Technology Madras
- Chennai
- India
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23
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Schläfer J, Tyrra W, Mathur S. Octakis(tert-butoxo)dicerium(IV) [Ce2(OtBu)8]: Synthesis, Characterization, Decomposition, and Reactivity. Inorg Chem 2014; 53:2751-3. [DOI: 10.1021/ic4025876] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Johannes Schläfer
- Institute
of Inorganic Chemistry, University of Cologne, Greinstraße 6, D-50939 Cologne, Germany
| | - Wieland Tyrra
- Institute
of Inorganic Chemistry, University of Cologne, Greinstraße 6, D-50939 Cologne, Germany
| | - Sanjay Mathur
- Institute
of Inorganic Chemistry, University of Cologne, Greinstraße 6, D-50939 Cologne, Germany
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25
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Chua YY, Duong HA. Selective Kumada biaryl cross-coupling reaction enabled by an iron(iii) alkoxide–N-heterocyclic carbene catalyst system. Chem Commun (Camb) 2014; 50:8424-7. [DOI: 10.1039/c4cc02930e] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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