1
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Korber JN, Wille C, Leutzsch M, Fürstner A. From the Glovebox to the Benchtop: Air-Stable High Performance Molybdenum Alkylidyne Catalysts for Alkyne Metathesis. J Am Chem Soc 2023; 145:26993-27009. [PMID: 38032858 PMCID: PMC10722517 DOI: 10.1021/jacs.3c10430] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/03/2023] [Accepted: 11/06/2023] [Indexed: 12/02/2023]
Abstract
Molybdenum alkylidynes endowed with tripodal silanolate ligands belong to the most active and selective catalysts for alkyne metathesis known to date. This paper describes a new generation that is distinguished by an unprecedented level of stability and practicality without sacrificing the chemical virtues of their predecessors. Specifically, pyridine adducts of type 16 are easy to make on gram scale, can be routinely weighed and handled in air, and stay intact for many months outside the glovebox. When dissolved in toluene, however, spontaneous dissociation of the stabilizing pyridine ligand releases an active species of excellent performance and functional group tolerance. Specifically, a host of polar and apolar groups, various protic sites, and numerous basic functionalities proved compatible. The catalysts are characterized by crystallographic and spectroscopic means, including 95Mo NMR; their activity and stability are benchmarked in detail, and the enabling properties are illustrated by advanced applications to natural product synthesis. For the favorable overall application profile and ease of handling, complexes of this new series are expected to replace earlier catalyst generations and help encourage a more regular use of alkyne metathesis in general.
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Affiliation(s)
- J. Nepomuk Korber
- Max-Planck-Institut
für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Christian Wille
- Max-Planck-Institut
für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Markus Leutzsch
- Max-Planck-Institut
für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
| | - Alois Fürstner
- Max-Planck-Institut
für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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2
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Kita Y, Kato K, Takeuchi S, Oyoshi T, Kamata K, Hara M. Air-Stable Ni Catalysts Prepared by Liquid-Phase Reduction Using Hydrosilanes for Reactions with Hydrogen. ACS APPLIED MATERIALS & INTERFACES 2023; 15:55659-55668. [PMID: 38010144 DOI: 10.1021/acsami.3c11487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
The liquid-phase reduction method for the preparation of metal nanoparticles (NPs) by the reduction of metal salts or metal complexes in a solvent with a reducing agent is widely used to prepare Ni NPs that exhibit high catalytic activity in various organic transformations. Intensive research has been conducted on control of the morphology and size of Ni NPs by the addition of polymers and long-chain compounds as protective agents; however, these agents typically cause a decrease in catalytic activity. Here, we report on the preparation of Ni NPs using hydrosilane (Ni-Si) as a reducing agent and a size-controlling agent. The substituents on silicon can control not only the size but also the crystal phase of the Ni NPs. The prepared Ni NPs exhibited high catalytic performance for the hydrogenation of unsaturated compounds, aromatics, and heteroaromatics to give the corresponding hydrogenated products in high yields. The unique feature of Ni catalysts prepared by the hydrosilane-assisted method is that the catalysts can be handled under air as opposed to conventional Ni catalysts such as Raney Ni. Characterization studies indicated that the surface hydroxide was reduced under the catalytic reaction conditions with H2 at around 100 °C and with the assistance of organosilicon compounds deposited on the catalyst surface. The hydrosilane-assisted method presented here could be applied to the preparation of supported Ni catalysts (Ni-Si/support). The interaction between the Ni NPs and a metal oxide support enabled the direct amination of alcohols with ammonia to afford the primary amine selectively.
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Affiliation(s)
- Yusuke Kita
- Department of Chemistry and Bioengineering, Graduate School of Engineering, Osaka Metropolitan University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Kahoko Kato
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama 226-8503, Japan
| | - Shun Takeuchi
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama 226-8503, Japan
| | - Takaaki Oyoshi
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama 226-8503, Japan
| | - Keigo Kamata
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama 226-8503, Japan
| | - Michikazu Hara
- Laboratory for Materials and Structures, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho 4259, Midori-ku, Yokohama 226-8503, Japan
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3
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Shiau AA, Lee HB, Oyala PH, Agapie T. Mn IV4O 4 Model of the S 3 Intermediate of the Oxygen-Evolving Complex: Effect of the Dianionic Disiloxide Ligand. Inorg Chem 2023; 62:1791-1796. [PMID: 35829634 DOI: 10.1021/acs.inorgchem.2c01612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Synthetic complexes provide useful models to study the interplay between the structure and spectroscopy of the different Sn-state intermediates of the oxygen-evolving complex (OEC) of photosystem II (PSII). Complexes containing the MnIV4 core corresponding to the S3 state, the last observable intermediate prior to dioxygen formation, remain very rare. Toward the development of synthetic strategies to stabilize highly oxidized tetranuclear complexes, ligands with increased anion charge were pursued. Herein, we report the synthesis, electrochemistry, SQUID magnetometry, and electron paramagnetic resonance spectroscopy of a stable MnIV4O4 cuboidal complex supported by a disiloxide ligand. The substitution of an anionic acetate or amidate ligand with a dianionic disiloxide ligand shifts the reduction potential of the MnIIIMnIV3/MnIV4 redox couple by up to ∼760 mV, improving stability. The S = 3 spin ground state of the siloxide-ligated MnIV4O4 complex matches the acetate and amidate variants, in corroboration with the MnIV4 assignment of the S3 state of the OEC.
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Affiliation(s)
- Angela A Shiau
- Department of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
| | - Heui Beom Lee
- Department of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
| | - Paul H Oyala
- Department of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
| | - Theodor Agapie
- Department of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, United States
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4
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Goncharova IK, Tukhvatshin RS, Novikov RA, Volodin AD, Korlyukov AA, Lakhtin VG, Arzumanyan A. Complementary Cooperative Catalytic Systems in the Aerobic Oxidation of a Wide Range of Si–H‐Reagents to Si–OH‐Products: From Monomers to Oligomers and Polymers. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200871] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Irina K. Goncharova
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Organoelements compounds RUSSIAN FEDERATION
| | - Rinat S. Tukhvatshin
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Organoelements compounds RUSSIAN FEDERATION
| | - Roman A. Novikov
- Zelinsky Institute of Organic Chemistry RAS: Institut organiceskoj himii imeni N D Zelinskogo RAN Organic chemistry RUSSIAN FEDERATION
| | - Alexander D. Volodin
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Organoelements compounds RUSSIAN FEDERATION
| | - Alexander A. Korlyukov
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Organoelements compounds RUSSIAN FEDERATION
| | - Valentin G. Lakhtin
- A V Topchiev Institute of Petrochemical Synthesis Russian Academy of Sciences: Institut neftehimiceskogo sinteza imeni A V Topcieva Rossijskaa akademia nauk Organoelements compounds RUSSIAN FEDERATION
| | - Ashot Arzumanyan
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Chemistry 28 Vavilov str. 119991 Moscow RUSSIAN FEDERATION
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5
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Willauer AR, Fadaei-Tirani F, Zivkovic I, Sienkiewicz A, Mazzanti M. Structure and Reactivity of Polynuclear Divalent Lanthanide Disiloxanediolate Complexes. Inorg Chem 2022; 61:7436-7447. [PMID: 35505299 DOI: 10.1021/acs.inorgchem.2c00479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Trinuclear molecular complexes of europium (II) and ytterbium(II) [Ln3{(Ph2SiO)2O}3(THF)6], 1-Ln3L3 (Ln = Eu and Yb), supported by the dianionic tetraphenyl disiloxanediolate ligand, were synthesized via protonolysis of the [Ln{N(SiMe3)2}2(THF)2] complexes. In contrast, the reaction of [Sm{N(SiMe3)2}2(THF)2] with the (Ph2SiOH)2O ligand led to the isolation of the mixed-valent Sm(II)/Sm(III) complex [Sm3{(Ph2SiO)2O}3{N(SiMe3)2}(THF)4], 2-Sm3L3, which was crystallographically characterized. The Eu(II) complex 1-Eu3L3 displays weak ferromagnetic coupling between the Eu(II) metal centers (J = 0.1035 cm-1). The addition of 3 equiv of (Ph2SiOK)2O to 1-Eu3L3 resulted in the formation of the polynuclear Eu(II) dimer of dimers [K4Eu2{(Ph2SiO)2O}4(Et2O)2]2, 3-Eu2L4. Complexes 1-Ln3L3 (Ln = Eu and Yb) are stable in solution at room temperature, while 3-Eu2L4 shows higher reactivity and rapidly decomposes to give the mixed-valent Eu(II)/Eu(III) species [K3Eu2{(Ph2SiO)2O}4], 4-Eu2L4. Complex 1-Yb3L3 affects the slow reductive disproportionation of carbon dioxide, but 1-Eu3L3 does not display any reactivity toward CO2. However, the presence of one additional (Ph2SiO-)2O per Eu(II) metal center in 3-Eu2L4 increases dramatically the reductive ability of the Eu(II) metal centers, affording the first example of carbon dioxide activation by an isolated divalent europium complex. The reduction of CO2 by 3-Eu2L4 is immediate, and carbonate is formed selectively after the addition of a stoichiometric amount of CO2.
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Affiliation(s)
- Aurélien R Willauer
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Farzaneh Fadaei-Tirani
- Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Ivica Zivkovic
- Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Andrzej Sienkiewicz
- Laboratory for Quantum Magnetism, Institute of Physics, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.,ADSresonances Sàrl; Route de Genève 60B, 1028 Préverenges, Switzerland
| | - Marinella Mazzanti
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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6
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Trzmiel SPO, Langmann J, Maichle-Mössmer C, Anwander R. Chromous siloxides of variable nuclearity and magnetism. Dalton Trans 2022; 51:5072-5081. [PMID: 35262151 DOI: 10.1039/d2dt00354f] [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
Treatment of Cr[N(SiMe3)2]2(thf)2 with HOSiR3 (R = Et, iPr) in THF afforded the bridged CrII siloxide complexes Cr3(OSiEt3)2(μ-OSiEt3)4(thf)2 and Cr2(OSiiPr3)2(μ-OSiiPr3)2(thf)2 in high yield. Exposure of these compounds to vacuum in aliphatic solvents led to the loss of coordinated THF and to the formation of the homoleptic chromous siloxides Cr4(μ-OSiEt3)8 and Cr3(OSiiPr3)2(μ-OSiiPr3)4, respectively, in moderate to high yield. Use of TMEDA as a potentially bidentate donor molecule gave the monomeric cis-coordinated siloxide Cr(OSiiPr3)2(tmeda) (tmeda = N,N,N',N'-tetramethylethane-1,2-diamine). Oxidation of Cr2(OSiiPr3)2(μ-OSiiPr3)2(thf)2 with CHI3 and C2Cl6 produced the trigonal bipyramidal chromic compound CrIII(OSiiPr)3(thf)2 and asymmetrically coordinated Cr2Cl3(OSiiPr3)3(thf)3, respectively. Magnetic measurements (Evans and SQUID) hinted at (a) antiferromagnetic interactions between the CrII centres, (b) revealed higher effective magnetic moments (μeff) for cis-coordinated monomeric heteroleptic complexes compared to trans-coordinated ones, and (c) pointed out the highest (μeff) for the tetranuclear complex Cr4(μ-OSiEt3)8 (6.26μB, SQUID, 300 K; Cr⋯Cradjacent avg. 2.535 A).
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Affiliation(s)
- Simon P O Trzmiel
- Institute of Inorganic Chemistry, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany.
| | - Jan Langmann
- Institut für Physik, Universität Augsburg, Universitätsstr. 1, 86159 Augsburg, Germany
| | - Cäcilia Maichle-Mössmer
- Institute of Inorganic Chemistry, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany.
| | - Reiner Anwander
- Institute of Inorganic Chemistry, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany.
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7
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Morisue M, Ohno N, Saito G, Kawanishi M. Trimethylsilanolate-Promoted Activation of Alkynyl Trimethylsilanes: Hiyama-Type Sonogashira Cross-Coupling for the Synthesis of Arylene–Ethynylene-Linked Porphyrin Arrays. J Org Chem 2022; 87:3123-3134. [DOI: 10.1021/acs.joc.1c02879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mitsuhiko Morisue
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Nanase Ohno
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Genki Saito
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Miho Kawanishi
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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8
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Ishizaka Y, Matsumoto K, Sato K, Choi JC. Multinuclear rhodium complexes supported by tetra-tert-butoxy disiloxide ligand: Synthesis, structure, and reactivity. NEW J CHEM 2022. [DOI: 10.1039/d2nj03095k] [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
Rhodium siloxide complexes have been used as homogeneous catalysts and model compounds for silica-supported metal catalysts. However, rhodium complexes with multidentate siloxide ligands have rarely been prepared. In this study,...
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9
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Abstract
![]()
For numerous enabling features and strategic virtues, contemporary
alkyne metathesis is increasingly recognized as a formidable synthetic
tool. Central to this development was the remarkable evolution of
the catalysts during the past decades. Molybdenum alkylidynes carrying
(tripodal) silanolate ligands currently set the standards; their functional
group compatibility is exceptional, even though they comprise an early
transition metal in its highest oxidation state. Their performance
is manifested in case studies in the realm of dynamic covalent chemistry,
advanced applications to solid-phase synthesis, a revival of transannular
reactions, and the assembly of complex target molecules at sites,
which one may not intuitively trace back to an acetylenic ancestor.
In parallel with these innovations in material science and organic
synthesis, new insights into the mode of action of the most advanced
catalysts were gained by computational means and the use of unconventional
analytical tools such as 95Mo and 183W NMR spectroscopy.
The remaining shortcomings, gaps, and desiderata in the field are
also critically assessed.
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Affiliation(s)
- Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
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10
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Dankert F, Hänisch C. Siloxane Coordination Revisited: Si−O Bond Character, Reactivity and Magnificent Molecular Shapes. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100275] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Fabian Dankert
- Leibniz-Institut für Katalyse e. V. (LIKAT Rostock) Albert-Einstein-Str. 29a 18059 Rostock Germany
| | - Carsten Hänisch
- Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften (WZMW) Philipps-Universität Marburg Hans-Meerwein-Straße 4 35032 Marburg Germany
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11
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Rochlitz L, Searles K, Nater DF, Docherty SR, Gioffrè D, Copéret C. A Molecular Analogue of the C−H Activation Intermediate of the Silica‐Supported Ga(III) Single‐Site Propane Dehydrogenation Catalyst: Structure and XANES Signature. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100078] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lukas Rochlitz
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir Prelog Weg 1–5 CH-8093 Zurich Switzerland
| | - Keith Searles
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir Prelog Weg 1–5 CH-8093 Zurich Switzerland
| | - Darryl F. Nater
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir Prelog Weg 1–5 CH-8093 Zurich Switzerland
| | - Scott R. Docherty
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir Prelog Weg 1–5 CH-8093 Zurich Switzerland
| | - Domenico Gioffrè
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir Prelog Weg 1–5 CH-8093 Zurich Switzerland
| | - Christophe Copéret
- ETH Zürich Department of Chemistry and Applied Biosciences Vladimir Prelog Weg 1–5 CH-8093 Zurich Switzerland
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12
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Zier ML, Colombel-Rouen S, Ehrhorn H, Bockfeld D, Trolez Y, Mauduit M, Tamm M. Catalytic Alkyne and Diyne Metathesis with Mixed Fluoroalkoxy-Siloxy Molybdenum Alkylidyne Complexes. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00290] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Manuel L. Zier
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Sophie Colombel-Rouen
- Univ Rennes; Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR−UMR 6226, F-35000 Rennes, France
| | - Henrike Ehrhorn
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Dirk Bockfeld
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Yann Trolez
- Univ Rennes; Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR−UMR 6226, F-35000 Rennes, France
| | - Marc Mauduit
- Univ Rennes; Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR−UMR 6226, F-35000 Rennes, France
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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13
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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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14
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Dombrowski JP, Ziegler MS, Phadke NM, Mansoor E, Levine DS, Witzke RJ, Head-Gordon M, Bell AT, Tilley TD. Siloxyaluminate and Siloxygallate Complexes as Models for Framework and Partially Hydrolyzed Framework Sites in Zeolites and Zeotypes. Chemistry 2021; 27:307-315. [PMID: 32926472 DOI: 10.1002/chem.202002926] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 09/02/2020] [Indexed: 11/07/2022]
Abstract
Anionic molecular models for nonhydrolyzed and partially hydrolyzed aluminum and gallium framework sites on silica, M[OSi(OtBu)3 ]4 - and HOM[OSi(OtBu)3 ]3 - (where M=Al or Ga), were synthesized from anionic chlorides Li{M[OSi(OtBu)3 ]3 Cl} in salt metathesis reactions. Sequestration of lithium cations with [12]crown-4 afforded charge-separated ion pairs composed of monomeric anions M[OSi(OtBu)3 ]4 - with outer-sphere [([12]crown-4)2 Li]+ cations, and hydroxides {HOM[OSi(OtBu)3 ]3 } with pendant [([12]crown-4)Li]+ cations. These molecular models were characterized by single-crystal X-ray diffraction, vibrational spectroscopy, mass spectrometry and NMR spectroscopy. Upon treatment of monomeric [([12]crown-4)Li]{HOM[OSi(OtBu)3 ]3 } complexes with benzyl alcohol, benzyloxide complexes were formed, modeling a possible pathway for the formation of active sites for Meerwin-Ponndorf-Verley (MPV) transfer hydrogenations with Al/Ga-doped silica catalysts.
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Affiliation(s)
- James P Dombrowski
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Micah S Ziegler
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Neelay M Phadke
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Erum Mansoor
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, CA, 94720, USA.,Kenneth S. Pitzer Center for Theoretical Chemistry, Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Daniel S Levine
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA.,Kenneth S. Pitzer Center for Theoretical Chemistry, Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Ryan J Witzke
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Martin Head-Gordon
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA.,Kenneth S. Pitzer Center for Theoretical Chemistry, Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - Alexis T Bell
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA.,Department of Chemical and Biomolecular Engineering, University of California, Berkeley, Berkeley, CA, 94720, USA
| | - T Don Tilley
- Department of Chemistry, University of California, Berkeley, Berkeley, CA, 94720, USA.,Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, 94720, USA
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15
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Garg S, Unruh DK, Krempner C. Zirconium and hafnium polyhedral oligosilsesquioxane complexes – green homogeneous catalysts in the formation of bio-derived ethers via a MPV/etherification reaction cascade. Catal Sci Technol 2021. [DOI: 10.1039/d0cy01864c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Newly designed POSS supported zirconium and hafnium isopropoxides are robust, durable and selective homogeneous catalysts for the conversion of hydroxymethylfurfural to bis(isopropoxymethyl)furane via MPV/etherification reaction with isopropanol as a green solvent/reagent.
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Affiliation(s)
- Shipra Garg
- Department of Chemistry and Biochemistry
- Texas Tech University
- Lubbock
- USA
| | - Daniel K. Unruh
- Department of Chemistry and Biochemistry
- Texas Tech University
- Lubbock
- USA
| | - Clemens Krempner
- Department of Chemistry and Biochemistry
- Texas Tech University
- Lubbock
- USA
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16
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Hillenbrand J, Leutzsch M, Yiannakas E, Gordon CP, Wille C, Nöthling N, Copéret C, Fürstner A. "Canopy Catalysts" for Alkyne Metathesis: Molybdenum Alkylidyne Complexes with a Tripodal Ligand Framework. J Am Chem Soc 2020; 142:11279-11294. [PMID: 32463684 PMCID: PMC7322728 DOI: 10.1021/jacs.0c04742] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
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A new family of structurally well-defined
molybdenum alkylidyne
catalysts for alkyne metathesis, which is distinguished by a tripodal
trisilanolate ligand architecture, is presented. Complexes of type 1 combine the virtues of previous generations of silanolate-based
catalysts with a significantly improved functional group tolerance.
They are easy to prepare on scale; the modularity of the ligand synthesis
allows the steric and electronic properties to be fine-tuned and hence
the application profile of the catalysts to be optimized. This opportunity
is manifested in the development of catalyst 1f, which
is as reactive as the best ancestors but exhibits an unrivaled scope.
The new catalysts work well in the presence of unprotected alcohols
and various other protic groups. The chelate effect entails even a
certain stability toward water, which marks a big leap forward in
metal alkylidyne chemistry in general. At the same time, they tolerate
many donor sites, including basic nitrogen and numerous heterocycles.
This aspect is substantiated by applications to polyfunctional (natural)
products. A combined spectroscopic, crystallographic, and computational
study provides insights into structure and electronic character of
complexes of type 1. Particularly informative are a density
functional theory (DFT)-based chemical shift tensor analysis of the
alkylidyne carbon atom and 95Mo NMR spectroscopy; this
analytical tool had been rarely used in organometallic chemistry before
but turns out to be a sensitive probe that deserves more attention.
The data show that the podand ligands render a Mo-alkylidyne a priori
more electrophilic than analogous monodentate triarylsilanols; proper
ligand tuning, however, allows the Lewis acidity as well as the steric
demand about the central atom to be adjusted to the point that excellent
performance of the catalyst is ensured.
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Affiliation(s)
| | - Markus Leutzsch
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
| | - Ektoras Yiannakas
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
| | - Christopher P Gordon
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093 Zürich, Switzerland
| | - Christian Wille
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
| | - Nils Nöthling
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5, 8093 Zürich, Switzerland
| | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung, 45470 Mülheim/Ruhr, Germany
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17
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Barluzzi L, Falcone M, Mazzanti M. Small molecule activation by multimetallic uranium complexes supported by siloxide ligands. Chem Commun (Camb) 2019; 55:13031-13047. [PMID: 31608910 DOI: 10.1039/c9cc05605j] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The synthesis and reactivity of uranium compounds supported by the tris-tert-butoxysiloxide ligand is surveyed. The multiple binding modes of the tert-butoxysiloxide ligand have proven very well suited to stabilize highly reactive homo- and heteropolymetallic complexes of uranium that have shown an unusual high reactivity towards small molecules such as CO2, CS2, chalcogens and azides. Moreover, these ligands have allowed the isolation of dinuclear nitride and oxide bridged complexes of uranium in various oxidation states. The ability of the tris-tert-butoxysiloxide ligands to trap alkali ions in these nitride or oxide complexes leads to unprecedented ligand based and metal based reduction and functionalization of N2, CO, CO2 and H2.
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Affiliation(s)
- Luciano Barluzzi
- I Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Marta Falcone
- I Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
| | - Marinella Mazzanti
- I Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
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18
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Friedrich J, Maichle‐Mössmer C, Schrenk C, Schnepf A, Anwander R. Ceric Ammonium Nitrate and Ceric Ammonium Chloride as Precursors for Ceric Siloxides: Ammonia and Ammonium Inclusion. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801150] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Jochen Friedrich
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Germany
| | - Cäcilia Maichle‐Mössmer
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Germany
| | - Claudio Schrenk
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Germany
| | - Andreas Schnepf
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Germany
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19
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Werner D, Anwander R. Unveiling the Takai Olefination Reagent via Tris( tert-butoxy)siloxy Variants. J Am Chem Soc 2018; 140:14334-14341. [PMID: 30213182 DOI: 10.1021/jacs.8b08739] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The elusive Takai olefination reagent, namely, the iodo-methylidene Cr(III) complex [Cr2Cl4(CHI)(thf)4], has been isolated by careful handling of the reaction between CrCl2 and CHI3 in THF at -35 °C. Alternatively, treatment of [Cr(OSi(O tBu)3)2] with CHI3 gave the mixed-valent dihalido-methanide complex [CrII/III2I2(OSi(O tBu)3)2(CHI2)], featuring a Cr(III)-CHI2 moiety. In the presence of TMEDA nucleophilic attack at CHI2 occurred generating the zwitterionic species [CrIII(OSi(O tBu)3)2(tmeda-CHI)][I]. Complexes [Cr2Cl4(CHI)(thf)4] and [CrII/III2I2(OSi(O tBu)3)2(CHI2)] were screened for their ability to induce monohalido olefination of benzaldehyde. Remarkably, both complexes promote olefination, with [Cr2Cl4(CHI)(thf)4] accomplishing the same E selectivity as Takai 's original mixture. Complex [CrII/III2I2(OSi(O tBu)3)2(CHI2)], however, appeared to give preferentially Z isomer, corroborating the monoiodo-methylidene species Cr(III)-CHI-Cr(III) as the active olefination component of the original in situ generated Takai reagent mixture.
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Affiliation(s)
- Daniel Werner
- 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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20
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Family of penta- and hexanuclear metallasilsesquioxanes: Synthesis, structure and catalytic properties in oxidations. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2017.10.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Docherty SR, Estes DP, Copéret C. Facile Synthesis of Unsymmetrical Trialkoxysilanols: (RO) 2
(R′O)SiOH. Helv Chim Acta 2018. [DOI: 10.1002/hlca.201700298] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Scott R. Docherty
- Department of Chemistry and Applied Biology; ETH Zürich; Vladimir-Prelog-Weg 1-5 CH-8093 Zürich Switzerland
| | - Deven P. Estes
- Department of Chemistry and Applied Biology; ETH Zürich; Vladimir-Prelog-Weg 1-5 CH-8093 Zürich Switzerland
| | - Christophe Copéret
- Department of Chemistry and Applied Biology; ETH Zürich; Vladimir-Prelog-Weg 1-5 CH-8093 Zürich Switzerland
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22
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Bauer JO, Strohmann C. Synthesis and molecular structure of a zwitterionic ZnI2 silanolate. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Friedrich J, Qiao Y, Maichle-Mössmer C, Schelter EJ, Anwander R. Redox-enhanced hemilability of a tris(tert-butoxy)siloxy ligand at cerium. Dalton Trans 2018; 47:10113-10123. [DOI: 10.1039/c8dt01878b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Combined structural/electrochemical/computational studies of ceric Ce[OSi(OtBu)3]4 and cerous [Ce{OSi(OtBu)3}4][K(2.2.2-crypt)] suggest a redox-modulated coordination switch of a tris(tert-butoxy)siloxy ligand.
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Affiliation(s)
- Jochen Friedrich
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
| | - Yusen Qiao
- 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
| | - Reiner Anwander
- Institut für Anorganische Chemie
- Eberhard Karls Universität Tübingen
- 72076 Tübingen
- Germany
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24
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Lorenz V, Ehle S, Liebing P, Engelhardt F, Hashemi-Haeri H, Oehler F, Hinderberger D, Busse S, Urbaschok J, Edelmann FT. High-yield synthesis of a unique Mn(iii) siloxide complex through KMnO 4 oxidation of a Mn(ii) precursor. Dalton Trans 2017; 47:62-66. [PMID: 29226937 DOI: 10.1039/c7dt03500d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A unique trivalent manganese siloxide complex, blue-violet MnIIILi2Cl[(Ph2SiO)2O]2(THF)4·2THF (3) has been prepared by a straightforward two-step synthetic protocol. Lithiation of (Ph2SiOH)2O (1) followed by reaction with MnCl2(THF)2 gave the structurally remarkable Mn(ii) precursor MnIILi4Cl2[(Ph2SiO)2O]2(THF)5·2THF (2). Surprisingly, the final oxidation step could be achieved using KMnO4 in THF to provide the Mn(iii) species 3 in high yield (91%). Both title compounds were structurally characterized by single-crystal X-ray diffraction.
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Affiliation(s)
- Volker Lorenz
- Chemisches Institut der Otto-von-Guericke-Universität, 39106 Magdeburg, Germany.
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25
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Golz C, Steffen P, Strohmann C. Exploring Planar-Chiral Amino Siloxides. Angew Chem Int Ed Engl 2017; 56:8295-8298. [PMID: 28504830 DOI: 10.1002/anie.201703701] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Indexed: 11/10/2022]
Abstract
We present the synthesis, structure, and exemplary reactivity of siloxides with a planar-chiral N,N-dimethylaminomethylferrocene backbone. Several zinc complexes based on the racemic as well as the enantiomerically pure silanol were synthesized in the presence of water and crystallographically characterized, and their behavior in solution was examined. The chiral probe present in this system is a valuable tool for identifying the structure in solution. Furthermore, the zinc siloxides exhibit a comparable reactivity to the corresponding silanols. Therefore, they can be regarded as "masked" silanols, especially when the silanols are preparatively inaccessible.
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Affiliation(s)
- Christopher Golz
- Anorganische Chemie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
| | - Patricia Steffen
- Anorganische Chemie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
| | - Carsten Strohmann
- Anorganische Chemie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44227, Dortmund, Germany
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26
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Affiliation(s)
- Christopher Golz
- Anorganische Chemie; Technische Universität Dortmund; Otto-Hahn-Straße 6 44227 Dortmund Deutschland
| | - Patricia Steffen
- Anorganische Chemie; Technische Universität Dortmund; Otto-Hahn-Straße 6 44227 Dortmund Deutschland
| | - Carsten Strohmann
- Anorganische Chemie; Technische Universität Dortmund; Otto-Hahn-Straße 6 44227 Dortmund Deutschland
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27
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Richers CP, Bertke JA, Rauchfuss TB. Syntheses of transition metal methoxysiloxides. Dalton Trans 2017; 46:8756-8762. [PMID: 28138664 DOI: 10.1039/c6dt04205h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The paper describes three methods for the preparation of methoxysiloxide complexes, a rare class of complexes of relevance to room temperature vulcanization (RTV) of polysiloxanes.
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Affiliation(s)
- Casseday P. Richers
- School of Chemical Sciences
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - Jeffery A. Bertke
- School of Chemical Sciences
- University of Illinois at Urbana-Champaign
- Urbana
- USA
| | - Thomas B. Rauchfuss
- School of Chemical Sciences
- University of Illinois at Urbana-Champaign
- Urbana
- USA
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28
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Gießmann S, Lorenz V, Liebing P, Hilfert L, Fischer A, Edelmann FT. Synthesis and structural study of new metallasilsesquioxanes of potassium and uranium. Dalton Trans 2017; 46:2415-2419. [DOI: 10.1039/c7dt00006e] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first metallasilsesquioxanes comprising potassium and uranium have been synthesized and structurally characterized by single-crystal X-ray diffraction.
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Affiliation(s)
- Stephan Gießmann
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Volker Lorenz
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Phil Liebing
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Liane Hilfert
- Chemisches Institut der Otto-von-Guericke-Universität
- 39106 Magdeburg
- Germany
| | - Axel Fischer
- 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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29
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Friedrich J, Maichle-Mössmer C, Anwander R. Synthesis and derivatisation of ceric tris(tert-butoxy)siloxides. Chem Commun (Camb) 2017; 53:12044-12047. [DOI: 10.1039/c7cc06499c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Heteroleptic ceric Ce[OSi(OtBu)3]3Cl(thf) is straightforwardly obtained from cerous Ce[OSi(OtBu)3]3(thf)2 and trityl chloride and gives access to the terminal siloxy/methoxy derivative Ce[OSi(OtBu)3]3(OCH3)(thf)2.
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Affiliation(s)
- Jochen Friedrich
- Institut für Anorganische Chemie Universität Tübingen
- Auf der Morgenstelle 18
- 72076 Tübingen
- Germany
| | - Cäcilia Maichle-Mössmer
- Institut für Anorganische Chemie Universität Tübingen
- Auf der Morgenstelle 18
- 72076 Tübingen
- Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie Universität Tübingen
- Auf der Morgenstelle 18
- 72076 Tübingen
- Germany
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30
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Dettenrieder N, Dietrich HM, Maichle-Mössmer C, Anwander R. Yttrium Siloxide Complexes Bearing Terminal Methyl Ligands: Molecular Models for Ln−CH3Terminated Silica Surfaces. Chemistry 2016; 22:13189-200. [DOI: 10.1002/chem.201602424] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Nicole Dettenrieder
- Institute of Inorganic Chemistry; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
| | - H. Martin Dietrich
- Institute of Inorganic Chemistry; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Cäcilia Maichle-Mössmer
- Institute of Inorganic Chemistry; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Reiner Anwander
- Institute of Inorganic Chemistry; Eberhard Karls Universität Tübingen; Auf der Morgenstelle 18 72076 Tübingen Germany
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31
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Richers CP, Bertke J, Rauchfuss TB. Insights into the Hydrolytic Polymerization of Trimethoxymethylsilane. Crystal Structure of (MeO)2MeSiONa. Inorg Chem 2016; 55:5744-6. [PMID: 27258853 DOI: 10.1021/acs.inorgchem.6b00874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The commercially practiced conversion of trimethoxymethylsilane (MTM) to [OSi(OMe)Me)]n polymers and resins is assumed to proceed via the silanol (MeO)2MeSiOH. Access to this crucial silanol is gained via the synthesis of (MeO)2MeSiONa, the first methoxysilanoate to be crystallographically characterized. Mild protonation of this silanoate gives (MeO)2MeSiOH, which is shown to condense with (MeO)2MeSiOH but not with MTM. Condensation generates reactive disiloxanols but does not produce symmetric disiloxanes. Parallel results were obtained with (MeO)2PhSiOH.
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Affiliation(s)
- Casseday P Richers
- School of Chemical Sciences University of Illinois at Champaign-Urbana Urbana, Illinois 61801, United States
| | - Jeffery Bertke
- School of Chemical Sciences University of Illinois at Champaign-Urbana Urbana, Illinois 61801, United States
| | - Thomas B Rauchfuss
- School of Chemical Sciences University of Illinois at Champaign-Urbana Urbana, Illinois 61801, United States
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32
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Levitsky MM, Bilyachenko AN. Modern concepts and methods in the chemistry of polyhedral metallasiloxanes. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.07.007] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Fukawa M, Sato T, Kabe Y. A hydrogen bonded molecular capsule versus a 3D network of tripodal organopolysilanols. Chem Commun (Camb) 2015; 51:14746-9. [DOI: 10.1039/c5cc04515k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
1,3,5-Triethylbenzene based tripodal trisilanols were synthesized. X-ray, NMR and ESI-mass spectra disclosed the first example of an organotrisilanol molecular capsule based on a 1,3,5-triethylbenzene scaffold which showed encapsulation of H2O or halogen anions in both the crystalline and solution states.
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Affiliation(s)
- Marina Fukawa
- Department of Chemistry
- Faculty of Science
- Kanagawa University 2946
- Tsuchiya Hiratsuka 259-1293
- Japan
| | - Takayuki Sato
- Department of Chemistry
- Faculty of Science
- Kanagawa University 2946
- Tsuchiya Hiratsuka 259-1293
- Japan
| | - Yoshio Kabe
- Department of Chemistry
- Faculty of Science
- Kanagawa University 2946
- Tsuchiya Hiratsuka 259-1293
- Japan
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35
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Ali A, Langer M, Lorenz V, Hrib CG, Hilfert L, Edelmann FT. Synthesis and structure of hexaphenyltrisiloxanediolates of sodium, titanium, and iron. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2014.11.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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36
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Lorenz V, Hrib CG, Jones PG, Edelmann FT. Synthesis and structure of a heterotrimetallic (Li/Er/In), heptacyclic metallasiloxane cage compound. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.09.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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37
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Rausch J, Lorenz V, Hrib CG, Frettlöh V, Adlung M, Wickleder C, Hilfert L, Jones PG, Edelmann FT. Heterometallic europium disiloxanediolates: synthesis, structural diversity, and photoluminescence properties. Inorg Chem 2014; 53:11662-74. [PMID: 25330143 DOI: 10.1021/ic501837x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
This contribution presents a full account of a structurally diverse class of heterometallic europium disiloxanediolates. The synthetic protocol involves in situ metalation of (HO)SiPh2OSiPh2(OH) (1) with either (n)BuLi or KN(SiMe3)2 followed by treatment with EuCl3 in suitable solvents such as 1,2-dimethoxyethane (DME) or tetrahydrofuran (THF). Reaction of EuCl3 with 2 equiv of (LiO)SiPh2OSiPh2(OLi) in DME afforded the Eu(III) bis(disiloxanediolate) "ate" complex [{(Ph2SiO)2O}2{Li(DME)}3]EuCl2 (2), which upon attempted reduction with Zn gave the tris(disiloxanediolate) [{(Ph2SiO)2O}3{Li(DME)}3]Eu (3). Treatment of EuCl3 with (LiO)SiPh2OSiPh2(OLi) in a molar ratio of 1:2 yielded both the ate complex [{(Ph2SiO)2O}3Li{Li(THF)2}{Li(THF)}]EuCl·Li(THF)3 (4) and the LiCl-free europium(III) complex [{(Ph2SiO)2O}2{Li(THF)2}2]EuCl (5). Compound 5 was found to exhibit a brilliant red triboluminescence. When (KO)SiPh2OSiPh2(OK) was used as starting material in a 3:1 reaction with EuCl3, the Eu(III) tris(disiloxanediolate) [{(Ph2SiO)2O}3{K(DME)}3]Eu (6) was isolated. Attempted ligand transfer between 5 and (DAD(Dipp))2Ba(DME) (DAD(Dipp) = N,N'-bis(2,6-diisopropylphenyl)-1,4-diaza-1,3-butadiene) afforded the unique mixed-valent Eu(III)/Eu(II) disiloxanediolate cluster [(Ph2SiO)2O]6Eu(II)4Eu(III)2Li4O2Cl2 (7). All new complexes were structurally characterized by X-ray diffraction. Photoluminescence studies were carried out for complex 5 showing an excellent color quality, due to the strong (5)D0→(7)F2 transition, but a weak antenna effect.
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Affiliation(s)
- Janek Rausch
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg , Universitätsplatz 2, 39106 Magdeburg, Germany
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McNerney B, Whittlesey B, Cordes DB, Krempner C. A Well-Defined Monomeric Aluminum Complex as an Efficient and General Catalyst in the Meerwein-Ponndorf-Verley Reduction. Chemistry 2014; 20:14959-64. [DOI: 10.1002/chem.201404994] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Indexed: 10/24/2022]
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Hill MS, Johnson AL, Manning TD, Molloy KC, Wickham BJ. Single-source AACVD of composite cobalt-silicon oxide thin films. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.07.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Andrez J, Pécaut J, Bayle PA, Mazzanti M. Tuning Lanthanide Reactivity Towards Small Molecules with Electron-Rich Siloxide Ligands. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405031] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Andrez J, Pécaut J, Bayle PA, Mazzanti M. Tuning Lanthanide Reactivity Towards Small Molecules with Electron-Rich Siloxide Ligands. Angew Chem Int Ed Engl 2014; 53:10448-52. [DOI: 10.1002/anie.201405031] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 06/04/2014] [Indexed: 01/12/2023]
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Schax F, Braun B, Limberg C. A Tripodal Trisilanol Ligand and Its Complexation Behavior towards CuI, CuII, and ZnII. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201400088] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2011. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2013.05.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Mansell SM, Farnaby JH, Germeroth AI, Arnold PL. Thermally Stable Uranium Dinitrogen Complex with Siloxide Supporting Ligands. Organometallics 2013. [DOI: 10.1021/om4003957] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Stephen M. Mansell
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, The King’s
Buildings, Edinburgh, EH9 3JJ, U.K
| | - Joy H. Farnaby
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, The King’s
Buildings, Edinburgh, EH9 3JJ, U.K
| | - Anne I. Germeroth
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, The King’s
Buildings, Edinburgh, EH9 3JJ, U.K
| | - Polly L. Arnold
- EaStCHEM School of Chemistry, University of Edinburgh, Joseph Black Building, The King’s
Buildings, Edinburgh, EH9 3JJ, U.K
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Affiliation(s)
- Michael P. Marshak
- Department of Chemistry, Room 6-335, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United
States
| | - Daniel G. Nocera
- Department of Chemistry, Room 6-335, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, United
States
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Ehle S, Brüser V, Lorenz V, Hrib CG, Saulich K, Müller S, Quade A, Edelmann FT. Linear Heterometallic Co
3
Li
2
and Co
4
Li
2
Siloxides: Precursors for the Plasma Synthesis of Adsorbent Materials. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201060] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sophie Ehle
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany, Fax: +49‐391‐67‐12933, http://www.uni‐magdeburg.de/ich/d/ach/index.php
| | - Volker Brüser
- Leibniz Institute for Plasma Science and Technology, Felix‐Hausdorff‐Straße 2, 17489 Greifswald, Germany, Fax: +49‐3834‐554‐301, http://www.inp‐greifswald.de
| | - Volker Lorenz
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany, Fax: +49‐391‐67‐12933, http://www.uni‐magdeburg.de/ich/d/ach/index.php
| | - Cristian G. Hrib
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany, Fax: +49‐391‐67‐12933, http://www.uni‐magdeburg.de/ich/d/ach/index.php
| | - Katja Saulich
- Leibniz Institute for Plasma Science and Technology, Felix‐Hausdorff‐Straße 2, 17489 Greifswald, Germany, Fax: +49‐3834‐554‐301, http://www.inp‐greifswald.de
| | - Siegfried Müller
- Leibniz Institute for Plasma Science and Technology, Felix‐Hausdorff‐Straße 2, 17489 Greifswald, Germany, Fax: +49‐3834‐554‐301, http://www.inp‐greifswald.de
| | - Antje Quade
- Leibniz Institute for Plasma Science and Technology, Felix‐Hausdorff‐Straße 2, 17489 Greifswald, Germany, Fax: +49‐3834‐554‐301, http://www.inp‐greifswald.de
| | - Frank T. Edelmann
- Chemisches Institut der Otto‐von‐Guericke‐Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany, Fax: +49‐391‐67‐12933, http://www.uni‐magdeburg.de/ich/d/ach/index.php
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Mougel V, Camp C, Pécaut J, Copéret C, Maron L, Kefalidis CE, Mazzanti M. Siloxides as Supporting Ligands in Uranium(III)-Mediated Small-Molecule Activation. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206955] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Mougel V, Camp C, Pécaut J, Copéret C, Maron L, Kefalidis CE, Mazzanti M. Siloxides as Supporting Ligands in Uranium(III)-Mediated Small-Molecule Activation. Angew Chem Int Ed Engl 2012; 51:12280-4. [DOI: 10.1002/anie.201206955] [Citation(s) in RCA: 127] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Indexed: 11/09/2022]
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