1
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Modder DK, Scopelliti R, Mazzanti M. Accessing a Highly Reducing Uranium(III) Complex through Cyclometalation. Inorg Chem 2024; 63:9527-9538. [PMID: 38217471 DOI: 10.1021/acs.inorgchem.3c03668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2024]
Abstract
U(IV) cyclometalated complexes have shown rich reactivity, but their low oxidation state analogues still remain rare. Herein, we report the isolation of [K(2.2.2-cryptand)][UIII{N(SiMe3)2}2(κ2-C,N-CH2SiMe2NSiMe3)], 1, from the reduction of [UIII{N(SiMe)2}3] with KC8 and 2.2.2-cryptand at room temperature. Cyclic voltammetry studies demonstrate that 1 has a reduction potential similar to that of the previously reported [K(2.2.2-cryptand)][UII{N(SiMe)2}3] (Epc = -2.6 V versus Fc+/0 and Epc = -2.8 V versus Fc+/0, respectively). Complex 1, indeed, shows similar reducing abilities upon reactions with 4,4'-bipyridine, 2,2'-bipyridine, and 1-azidoadamantane. Interestingly, 1 was also found to be the first example of a mononuclear U(III) complex that is capable of reducing pyridine. In addition, it is shown that a wide variety of substrates can be inserted into the U-C bond, forming new U(III) metallacycles. These results highlight that cyclometalated U(III) complexes can serve as versatile precursors for a broad range of reactivity and for assembling a variety of novel chemical architectures.
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Affiliation(s)
- Dieuwertje K Modder
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Rosario Scopelliti
- Group of Coordination Chemistry, Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, 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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2
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Schiltz P, Casaretto N, Bourcier S, Auffrant A, Gosmini C. Phosphinoquinoline supported Co II, Ni II, and Fe II complexes: divergent behaviour upon reduction. Dalton Trans 2023; 52:14859-14866. [PMID: 37792445 DOI: 10.1039/d3dt02441e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
The reduction of [CoLBr2], a CoII complex supported by a diisopropylphosphinoquinoline (L) ligand, induced a ligand coupling giving access to a (PNNP) supported CoII complex which was isolated in 70% yield. This complex was formed using a minimum of 2 equivalents of a reductant (either Mn or KC8). The fate of [CoLBr2] in the presence of 1 equivalent of a reductant was more difficult to study; nevertheless, a CoI complex was characterised in the solid state. In order to determine whether this ligand coupling could occur with other 3d metals, L supported FeII and NiII complexes were synthesised. While no compound could be identified upon reduction of [FeLBr2], both [NiLBr2] and [NiL2Br](Br) led to the reduction at the metal center allowing the isolation of an original Ni0 trimer in a satisfactory yield. This study shows the different behaviours of these 3d metal complexes in the presence of a reductant.
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Affiliation(s)
- Pauline Schiltz
- Laboratoire de Chimie Moléculaire (LCM), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91120 Palaiseau, France.
| | - Nicolas Casaretto
- Laboratoire de Chimie Moléculaire (LCM), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91120 Palaiseau, France.
| | - Sophie Bourcier
- Laboratoire de Chimie Moléculaire (LCM), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91120 Palaiseau, France.
| | - Audrey Auffrant
- Laboratoire de Chimie Moléculaire (LCM), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91120 Palaiseau, France.
| | - Corinne Gosmini
- Laboratoire de Chimie Moléculaire (LCM), CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91120 Palaiseau, France.
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3
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Chung AB, Ryan AJ, Fang M, Ziller JW, Evans WJ. Reductive Reactivity of the 4f 75d 1 Gd(II) Ion in {Gd II[N(SiMe 3) 2] 3} -: Structural Characterization of Products of Coupling, Bond Cleavage, Insertion, and Radical Reactions. Inorg Chem 2021; 60:15635-15645. [PMID: 34606242 DOI: 10.1021/acs.inorgchem.1c02241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The reductive reactivity of a Ln(II) ion with a nontraditional 4fn5d1 electron configuration has been investigated by studying reactions of the {GdII(N(SiMe3)2)3]}- anion with a variety of reagents that survey the many reaction pathways available to this ion. The chemistry of both [K(18-c-6)2]+ and [K(crypt)]+ salts (18-c-6 = 18-crown-6; crypt = 2.2.2-cryptand) was examined to study the effect of the countercation. CS2 reacts with the crown salt [K(18-c-6)2][Gd(NR2)3] (1) to generate the bimetallic (CS3)2- complex {[K(18-c-6)](μ3-CS3-κS,κ2S',S'')Gd(NR2)2]}2, which contains two trithiocarbonate dianions that bridge Gd(III) centers and a potassium ion coordinated by 18-c-6. In contrast, the only crystalline product isolated from the reaction of CS2 with the crypt salt [K(crypt)][Gd(NR2)3] (2) is [K(crypt)]{(R2N)2Gd[SCS(CH2)Si(Me2)N(SiMe3)-κN,κS]}, which has a CS2 unit inserted into a cyclometalated amide ligand. Complexes 1 and 2 reductively couple pyridine to form bridging dipyridyl moieties, (NC5H4-C5H4N)2-, that generate bimetallic complexes differing only in the countercation, {[K(18-c-6)(C5H5N)2]}2{[(R2N)3Gd]2[μ-(NC5H4-C5H4N)2]} and [K(crypt)]2{[(R2N)3Gd]2[μ-(NC5H4-C5H4N)2]}. Complexes 1 and 2 also show similar reactivity with (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) to form the (TEMPO)- complexes [K(18-c-6)][(R2N)3Gd(η1-ONC5H6Me4)] and [K(crypt)][(R2N)3Gd(η1-ONC5H6Me4)], respectively. The first example of a bimetallic coordination complex containing a Bi-Gd bond, [K(crypt)][(R2N)3Gd(BiPh2)], was obtained by treating 2 with BiPh3.
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Affiliation(s)
- Amanda B Chung
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Austin J Ryan
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Ming Fang
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Joseph W Ziller
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - William J Evans
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
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4
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Tricoire M, Mahieu N, Simler T, Nocton G. Intermediate Valence States in Lanthanide Compounds. Chemistry 2021; 27:6860-6879. [PMID: 33340383 PMCID: PMC7610675 DOI: 10.1002/chem.202004735] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Indexed: 12/31/2022]
Abstract
Over more than 50 years, intermediate valence states in lanthanide compounds have often resulted in unexpected or puzzling spectroscopic and magnetic properties. Such experimental singularities could not be rationalised until new theoretical models involving multiconfigurational electronic ground states were established. In this minireview, the different singularities that have been observed among lanthanide complexes are highlighted, the models used to rationalise them are detailed and how such electronic effects may be adjusted depending on energy and symmetry considerations is considered. Understanding and tuning the ground-state multiconfigurational behaviour in lanthanide complexes may open new doors to modular and unusual reactivities.
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Affiliation(s)
- Maxime Tricoire
- LCM, CNRS, Ecole polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128, Palaiseau, cedex, France
| | - Nolwenn Mahieu
- LCM, CNRS, Ecole polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128, Palaiseau, cedex, France
| | - Thomas Simler
- LCM, CNRS, Ecole polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128, Palaiseau, cedex, France
| | - Grégory Nocton
- LCM, CNRS, Ecole polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128, Palaiseau, cedex, France
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5
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Abstract
The f-block chemistry of phospholyl and arsolyl ligands, heavier p-block analogues of substituted cyclopentadienyls (CpR , C5 R5 ) where one or more CR groups are replaced by P or As atoms, is less developed than for lighter isoelectronic C5 R5 rings. Heterocyclopentadienyl complexes can exhibit properties that complement and contrast with CpR chemistry. Given that there has been renewed interest in phospholyl and arsolyl f-block chemistry in the last two decades, coinciding with a renaissance in f-block solution chemistry, a review of this field is timely. Here, the syntheses of all structurally characterised examples of lanthanide and actinide phospholyl and arsolyl complexes to date are covered, including benzannulated derivatives, and together with group 3 complexes for completeness. The physicochemical properties of these complexes are reviewed, with the intention of motivating further research in this field.
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Affiliation(s)
- David P Mills
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M139PL, UK
| | - Peter Evans
- Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M139PL, UK
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6
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Müller I, Werncke CG. Reductive Coupling of (Fluoro)pyridines by Linear 3d-Metal(I) Silylamides of Cr-Co: A Tale of C-C Bond Formation, C-F Bond Cleavage and a Pyridyl Radical Anion. Chemistry 2021; 27:4932-4938. [PMID: 33453071 PMCID: PMC7986091 DOI: 10.1002/chem.202004852] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/21/2020] [Indexed: 01/10/2023]
Abstract
Herein, we disclose the facile reduction of pyridine (and its derivatives) by linear 3d-metal(I) silylamides (M=Cr-Co). This reaction resulted in intermolecular C-C coupling to give dinuclear metal(II) complexes bearing a bridging 4,4'-dihydrobipyridyl ligand. For iron, we demonstrated that the C-C coupling is reversible in solution, either directly or by reaction with substrates, via a presumed monomeric metal(II) complex bearing a pyridyl radical anion. In the course of this investigation, we also observed that the dinuclear metal(II) complex incorporating iron facilitated the isomerisation of 1,4-cyclohexadiene to 1,3-cyclohexadiene as well as equimolar amounts of benzene and cyclohexene. Furthermore, we synthesised and structurally characterised a non-3d-metal-bound pyridyl radical anion. The reactions of the silylamides with perfluoropyridine led to C-F bond cleavage with the formation of metal(II) fluoride complexes of manganese, iron and cobalt along with the homocoupling or reductive degradation of the substrate. In the case of cobalt, the use of lesser fluorinated pyridines led to C-F bond cleavage but no homocoupling. Overall, in this paper we provide insights into the multifaceted behaviour of simple (fluoro)pyridines in the presence of moderately to highly reducing metal complexes.
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Affiliation(s)
- Igor Müller
- Fachbereich Chemie/Department of ChemistryPhilipps-Universität MarburgHans-Meerwein-Strasse 435037MarburgGermany
| | - Christian Gunnar Werncke
- Fachbereich Chemie/Department of ChemistryPhilipps-Universität MarburgHans-Meerwein-Strasse 435037MarburgGermany
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7
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Modder DK, Palumbo CT, Douair I, Fadaei-Tirani F, Maron L, Mazzanti M. Delivery of a Masked Uranium(II) by an Oxide-Bridged Diuranium(III) Complex. Angew Chem Int Ed Engl 2021; 60:3737-3744. [PMID: 33085160 DOI: 10.1002/anie.202013473] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Indexed: 11/08/2022]
Abstract
Oxide is an attractive linker for building polymetallic complexes that provide molecular models for metal oxide activity, but studies of these systems are limited to metals in high oxidation states. Herein, we synthesized and characterized the molecular and electronic structure of diuranium bridged UIII /UIV and UIII /UIII complexes. Reactivity studies of these complexes revealed that the U-O bond is easily broken upon addition of N-heterocycles resulting in the delivery of a formal equivalent of UIII and UII , respectively, along with the uranium(IV) terminal-oxo coproduct. In particular, the UIII /UIII oxide complex effects the reductive coupling of pyridine and two-electron reduction of 4,4'-bipyridine affording unique examples of diuranium(III) complexes bridged by N-heterocyclic redox-active ligands. These results provide insight into the chemistry of low oxidation state metal oxides and demonstrate the use of oxo-bridged UIII /UIII complexes as a strategy to explore UII reactivity.
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Affiliation(s)
- Dieuwertje K Modder
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Chad T Palumbo
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Iskander Douair
- Laboratoire de Physique et Chimie des Nano-objets, Institut National des Sciences Appliquées, 31077, Toulouse, Cedex 4, France
| | - Farzaneh Fadaei-Tirani
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
| | - Laurent Maron
- Laboratoire de Physique et Chimie des Nano-objets, Institut National des Sciences Appliquées, 31077, Toulouse, Cedex 4, France
| | - Marinella Mazzanti
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland
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8
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Modder DK, Palumbo CT, Douair I, Fadaei‐Tirani F, Maron L, Mazzanti M. Delivery of a Masked Uranium(II) by an Oxide‐Bridged Diuranium(III) Complex. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202013473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dieuwertje K. Modder
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Chad T. Palumbo
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Iskander Douair
- Laboratoire de Physique et Chimie des Nano-objets Institut National des Sciences Appliquées 31077 Toulouse, Cedex 4 France
| | - Farzaneh Fadaei‐Tirani
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
| | - Laurent Maron
- Laboratoire de Physique et Chimie des Nano-objets Institut National des Sciences Appliquées 31077 Toulouse, Cedex 4 France
| | - Marinella Mazzanti
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland
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9
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Wang D, Tricoire M, Cemortan V, Moutet J, Nocton G. Redox activity of a dissymmetric ligand bridging divalent ytter-bium and reactive nickel fragments. Inorg Chem Front 2021; 8:647-657. [PMID: 33575034 PMCID: PMC7116723 DOI: 10.1039/d0qi00952k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of a reactive nickel dimethyl 1 bearing a redox-active, dissymmetric ligand, which is obtained by deprotonation of 2-pyrimidin-2-yl-1H-benzimidazole (Hbimpm) with a divalent lanthanide complex, Cp*2Yb(OEt2), affords an unprecedented, trimeric 2 with C(sp3)-C(sp3) bond formation between two ligands in an exo position. Meanwhile, the transient, dimeric species 3 can be isolated with the same ligand coupling fashion, however, with a drastic distorsion angle of the bimpm ligand and reactive NiMe2 fragment, revealing the possible mechanism of this rearrangement. A much more stable dimeric congener, 5, with an exo ligand coupling, is synthesized in the presence of 18-crown-6, which captures the potassium counter ion. The C-C coupling formation between two bimpm ligands results from the effective electron transfer from divalent lanthanide fragments. Without the divalent lanthanide, the reductive coupling occurs on a different carbon of the ligand, nicely showing the modulation of the spin density induced by the presence of the lanthanide ion. The electronic structures of these complexes are investigated by magnetic study (SQUID), indicating a 2F7/2 ground state for each ytterbium in all the heterometallics. This work firstly reports ligand coupling reactivity in a redox-active, yet dissymmetric system with divalent organolanthanides, and the reactive nickel moiety can impact the intriguing transition towards a stable homoleptic, trinulear lanthanide species.
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Affiliation(s)
- Ding Wang
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
| | - Maxime Tricoire
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
| | - Valeriu Cemortan
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
| | - Jules Moutet
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
| | - Grégory Nocton
- LCM, CNRS, École Polytechnique, Institut Polytechnique de Paris, Route de Saclay, 91128 Palaiseau, France
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10
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Paprocki V, Hrobárik P, Harriman KLM, Luff MS, Kupfer T, Kaupp M, Murugesu M, Braunschweig H. Ein neutrales 1,4‐Diborabenzol als π‐Ligand in Actinoidkomplexen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Valerie Paprocki
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Peter Hrobárik
- Institut für Chemie Theoretische Chemie/Quantenchemie, Sekr. C7 Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Deutschland
- Department of Inorganic Chemistry Faculty of Natural Sciences Comenius University 84215 Bratislava Slowakei
| | - Katie L. M. Harriman
- Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa Ontario K1N 6N5 Kanada
| | - Martin S. Luff
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Thomas Kupfer
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Martin Kaupp
- Institut für Chemie Theoretische Chemie/Quantenchemie, Sekr. C7 Technische Universität Berlin Straße des 17. Juni 135 10623 Berlin Deutschland
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular Sciences University of Ottawa 10 Marie Curie Ottawa Ontario K1N 6N5 Kanada
| | - Holger Braunschweig
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with Boron Julius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
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11
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Paprocki V, Hrobárik P, Harriman KLM, Luff MS, Kupfer T, Kaupp M, Murugesu M, Braunschweig H. Stable Actinide π Complexes of a Neutral 1,4-Diborabenzene. Angew Chem Int Ed Engl 2020; 59:13109-13115. [PMID: 32329111 PMCID: PMC7496575 DOI: 10.1002/anie.202004501] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Indexed: 11/25/2022]
Abstract
The π coordination of arene and anionic heteroarene ligands is a ubiquitous bonding motif in the organometallic chemistry of d-block and f-block elements. By contrast, related π interactions of neutral heteroarenes including neutral bora-π-aromatics are less prevalent particularly for the f-block, due to less effective metal-to-ligand backbonding. In fact, π complexes with neutral heteroarene ligands are essentially unknown for the actinides. We have now overcome these limitations by exploiting the exceptionally strong π donor capabilities of a neutral 1,4-diborabenzene. A series of remarkably robust, π-coordinated thorium(IV) and uranium(IV) half-sandwich complexes were synthesized by simply combining the bora-π-aromatic with ThCl4 (dme)2 or UCl4 , representing the first examples of actinide complexes with a neutral boracycle as sandwich-type ligand. Experimental and computational studies showed that the strong actinide-heteroarene interactions are predominately electrostatic in nature with distinct ligand-to-metal π donation and without significant π/δ backbonding contributions.
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Affiliation(s)
- Valerie Paprocki
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Peter Hrobárik
- Institut für ChemieTheoretische Chemie/Quantenchemie, Sekr. C7Technische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
- Department of Inorganic ChemistryFaculty of Natural SciencesComenius University84215BratislavaSlovakia
| | - Katie L. M. Harriman
- Department of Chemistry and Biomolecular SciencesUniversity of Ottawa10 Marie CurieOttawaOntarioK1N 6N5Canada
| | - Martin S. Luff
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Thomas Kupfer
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
| | - Martin Kaupp
- Institut für ChemieTheoretische Chemie/Quantenchemie, Sekr. C7Technische Universität BerlinStraße des 17. Juni 13510623BerlinGermany
| | - Muralee Murugesu
- Department of Chemistry and Biomolecular SciencesUniversity of Ottawa10 Marie CurieOttawaOntarioK1N 6N5Canada
| | - Holger Braunschweig
- Institut für Anorganische ChemieJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität WürzburgAm Hubland97074WürzburgGermany
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12
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Cui Y, Xiang L, Wang J, Li C, Hao W, Ye Q. Storage and release of two electrons from an electron-rich carbon-carbon bond: boron mediated reversible coupling of DMAP and 9-azajulolidine. Chem Commun (Camb) 2020; 56:6794-6797. [PMID: 32432259 DOI: 10.1039/d0cc01575j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This manuscript describes the preparation of [{(dpp-bian)BBr}Li(DME)3] (2, dpp-bian = 1,2-bis[(2,6-diisopropylphenyl) imino]acenaphthene) and [{(dpp-bian)BL}+Br-] (5, L = DMAP; 6, L = 9-azajulolidine). The 4,4-coupling of DMAP and 2,2-coupling of 9-azajulolidine can be achieved either by the reaction of 2 with L, or by one-electron reduction of borenium cations 5 and 6. Oxidation of 3 and 4 leads to C-C cleavage and regeneration of 5 and 6. All new compounds have been structurally characterized.
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Affiliation(s)
- Yunshu Cui
- Department of Chemistry, Southern University of Science and Technology, 518055 Shenzhen, P. R. China.
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13
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Liu J, Nodaraki LE, Cobb PJ, Giansiracusa MJ, Ortu F, Tuna F, Mills DP. Synthesis and characterisation of light lanthanide bis-phospholyl borohydride complexes. Dalton Trans 2020; 49:6504-6511. [PMID: 32367094 DOI: 10.1039/d0dt01241f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Organometallic lanthanide (Ln) chemistry is dominated by complexes that contain substituted cyclopentadienyl (CpR) ligands. Closely related phospholyls have received less attention, and although they have proven utility in stabilising low oxidation state Ln complexes the trivalent Ln chemistry of these ligands is limited in comparison. Herein, we synthesise two families of heteroleptic Ln3+ complexes, [Ln(Htp)2(μ-BH4)]2 (Htp = 2,5-di-tert-butylphospholyl; 1-Ln; Ln = La, Ce, Nd, Sm), and [[Ln(Htp)2(μ-BH4)2K(S)]n (2-Ln, Ln = La, Ce, S = 2 DME, n = 2; 3-Ce, Ln = Ce, S = Et2O and THF, n = ∞) via the reactions of parent [Ln(BH4)3(THF)3.5] with K(Htp), to investigate differences between Ln complexes with substituted phospholyl ligands and analogous CpR complexes. Complexes 1-3-Ln were characterised as appropriate by single crystal XRD, SQUID magnetometry, elemental analysis, multinuclear NMR, ATR-IR and UV-Vis-NIR spectroscopy. Ab initio calculations reveal that small changes in the Ln3+ coordination spheres of these complexes can have relatively large influences on crystal field splitting.
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Affiliation(s)
- Jingjing Liu
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Manchester, M13 9PL, UK.
| | - Lydia E Nodaraki
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Manchester, M13 9PL, UK.
| | - Philip J Cobb
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Manchester, M13 9PL, UK.
| | - Marcus J Giansiracusa
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Manchester, M13 9PL, UK.
| | - Fabrizio Ortu
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Manchester, M13 9PL, UK.
| | - Floriana Tuna
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Manchester, M13 9PL, UK.
| | - David P Mills
- Department of Chemistry, School of Natural Sciences, The University of Manchester, Manchester, M13 9PL, UK.
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14
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Haiduc I. Review. Inverse coordination. Organic nitrogen heterocycles as coordination centers. A survey of molecular topologies and systematization. Part 2. Six-membered rings. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1670349] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Ionel Haiduc
- Facultatea de Chimie, Universitatea Babeş-Bolyai, Cluj-Napoca, Romania
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15
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Cheisson T, Ricard L, Heinemann FW, Meyer K, Auffrant A, Nocton G. Synthesis and Reactivity of Low-Valent f-Element Iodide Complexes with Neutral Iminophosphorane Ligands. Inorg Chem 2018; 57:9230-9240. [DOI: 10.1021/acs.inorgchem.8b01259] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Thibault Cheisson
- LCM, Ecole Polytechnique, CNRS, Université Paris-Saclay, F-91128 Palaiseau Cedex, France
| | - Louis Ricard
- LCM, Ecole Polytechnique, CNRS, Université Paris-Saclay, F-91128 Palaiseau Cedex, France
| | - Frank W. Heinemann
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany
| | - Karsten Meyer
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander University Erlangen-Nürnberg (FAU), Egerlandstraße 1, 91058 Erlangen, Germany
| | - Audrey Auffrant
- LCM, Ecole Polytechnique, CNRS, Université Paris-Saclay, F-91128 Palaiseau Cedex, France
| | - Grégory Nocton
- LCM, Ecole Polytechnique, CNRS, Université Paris-Saclay, F-91128 Palaiseau Cedex, France
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16
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Affiliation(s)
- Niels J. C. van Velzen
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Sjoerd Harder
- Inorganic and Organometallic Chemistry, Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany
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17
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18
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Jaoul A, Nocton G, Clavaguéra C. Assessment of Density Functionals for Computing Thermodynamic Properties of Lanthanide Complexes. Chemphyschem 2017; 18:2688-2696. [DOI: 10.1002/cphc.201700629] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 07/07/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Arnaud Jaoul
- LCM, CNRS, Ecole polytechniqueUniversité Paris-Saclay Route de Saclay 91128 Palaiseau Cedex France
| | - Grégory Nocton
- LCM, CNRS, Ecole polytechniqueUniversité Paris-Saclay Route de Saclay 91128 Palaiseau Cedex France
| | - Carine Clavaguéra
- Laboratoire de Chimie PhysiqueCNRS Université Paris Sud, Université Paris-Saclay 15 avenue Jean Perrin 91405 Orsay Cedex France
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19
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Formanuik A, Ortu F, Liu J, Nodaraki LE, Tuna F, Kerridge A, Mills DP. Double Reduction of 4,4′-Bipyridine and Reductive Coupling of Pyridine by Two Thorium(III) Single-Electron Transfers. Chemistry 2017; 23:2290-2293. [DOI: 10.1002/chem.201605974] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Alasdair Formanuik
- School of Chemistry; The University of Manchester; Manchester M13 9PL UK
| | - Fabrizio Ortu
- School of Chemistry; The University of Manchester; Manchester M13 9PL UK
| | - Jingjing Liu
- School of Chemistry; The University of Manchester; Manchester M13 9PL UK
| | - Lydia E. Nodaraki
- School of Chemistry; The University of Manchester; Manchester M13 9PL UK
| | - Floriana Tuna
- School of Chemistry; The University of Manchester; Manchester M13 9PL UK
| | - Andrew Kerridge
- Department of Chemistry; Lancaster University; Lancaster LA1 4YB UK
| | - David P. Mills
- School of Chemistry; The University of Manchester; Manchester M13 9PL UK
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20
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Jaroschik F, Momin A, Martinez A, Harakat D, Ricard L, Le Goff XF, Nocton G. Synthesis and Characterization of 1,1′-Diphosphaplumbocenes: Oxidative Ligand Transfer Reactions with Divalent Thulium Complexes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00313] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Florian Jaroschik
- Institut
de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, B. P. 1039, 51687 Reims Cedex
2, France
- LCM,
CNRS, Ecole Polytechnique, Université Paris-Saclay, 91128 Palaiseau, France
| | - Aurélien Momin
- LCM,
CNRS, Ecole Polytechnique, Université Paris-Saclay, 91128 Palaiseau, France
| | - Agathe Martinez
- Institut
de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, B. P. 1039, 51687 Reims Cedex
2, France
| | - Dominique Harakat
- Institut
de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, B. P. 1039, 51687 Reims Cedex
2, France
| | - Louis Ricard
- LCM,
CNRS, Ecole Polytechnique, Université Paris-Saclay, 91128 Palaiseau, France
| | | | - Grégory Nocton
- LCM,
CNRS, Ecole Polytechnique, Université Paris-Saclay, 91128 Palaiseau, France
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21
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Goodwin CAP, Chilton NF, Vettese GF, Moreno Pineda E, Crowe IF, Ziller JW, Winpenny REP, Evans WJ, Mills DP. Physicochemical Properties of Near-Linear Lanthanide(II) Bis(silylamide) Complexes (Ln = Sm, Eu, Tm, Yb). Inorg Chem 2016; 55:10057-10067. [DOI: 10.1021/acs.inorgchem.6b00808] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Conrad A. P. Goodwin
- School of Chemistry, The University of Manchester, Oxford
Road, Manchester M13 9PL, U.K
| | - Nicholas F. Chilton
- School of Chemistry, The University of Manchester, Oxford
Road, Manchester M13 9PL, U.K
| | - Gianni F. Vettese
- School of Chemistry, The University of Manchester, Oxford
Road, Manchester M13 9PL, U.K
| | - Eufemio Moreno Pineda
- School of Chemistry, The University of Manchester, Oxford
Road, Manchester M13 9PL, U.K
| | - Iain F. Crowe
- Photon Science Institute and School of
Electrical and Electronic Engineering, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Joseph W. Ziller
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | | | - William J. Evans
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - David P. Mills
- School of Chemistry, The University of Manchester, Oxford
Road, Manchester M13 9PL, U.K
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22
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Maria L, Soares M, Santos IC, Sousa VR, Mora E, Marçalo J, Luzyanin KV. A novel samarium(ii) complex bearing a dianionic bis(phenolate) cyclam ligand: synthesis, structure and electron-transfer reactions. Dalton Trans 2016; 45:3778-90. [PMID: 26818107 DOI: 10.1039/c5dt04647e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The reaction of the hexadentate dianionic 1,4,8,11-tetraazacyclotetradecane-based bis(phenolate) ligand, (tBu2ArO)2Me2-cyclam(2-), with [SmI2(thf )2] in thf resulted in the formation of the divalent samarium complex [Sm(κ(6)-{(tBu2ArO)2Me2-cyclam})] (1). X-ray diffraction studies revealed that after recrystallization from n-hexane/thf complex 1 has a monomeric structure and does not contain thf molecules coordinated to the Sm(II) center. However, UV-vis and (1)H NMR spectroscopy of 1 evidenced the formation of thf-solvated complexes in neat thf. Reductive studies show that complex 1 can act as a single electrontransfer reagent and form well-defined Sm(III) species. The reaction of 1 with several substrates, namely, TlBPh4, pyridine N-oxide, OPPh3, SPPh3 and bipyridines, are reported. Spectroscopy studies, including NMR, and single crystal X-ray diffraction data are in agreement with the formation of cationic Sm(III) species, monochalcogenide bridged Sm(III) complexes and Sm(III) complexes with bipyridine radical ligand, respectively.
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Affiliation(s)
- Leonor Maria
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal.
| | - Marina Soares
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal. and Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - Isabel C Santos
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal.
| | - Vânia R Sousa
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal.
| | - Elsa Mora
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal.
| | - Joaquim Marçalo
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066 Bobadela LRS, Portugal.
| | - Konstantin V Luzyanin
- Institute of Chemistry, Saint Petersburg State University, Universitetsky pr. 26, 198504 Saint Petersburg, Russian Federation and Department of Chemistry, University of Liverpool, Crown Street, L69 7ZD, Liverpool, UK
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23
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Jaoul A, Clavaguéra C, Nocton G. Electron transfer in tetramethylbiphosphinine complexes of Cp*2Yb and Cp*2Sm. NEW J CHEM 2016. [DOI: 10.1039/c6nj00527f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
How to make sure an electron is really transferred to a tmbp ligand?
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Affiliation(s)
- Arnaud Jaoul
- LCM
- CNRS
- Ecole Polytechnique
- Université Paris-Saclay
- 91128 Palaiseau
| | | | - Grégory Nocton
- LCM
- CNRS
- Ecole Polytechnique
- Université Paris-Saclay
- 91128 Palaiseau
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24
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Cheisson T, Auffrant A, Nocton G. η5–η1 Switch in Divalent Phosphaytterbocene Complexes with Neutral Iminophosphoranyl Pincer Ligands: Solid-State Structures and Solution NMR 1JYb–P Coupling Constants. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00814] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thibault Cheisson
- Laboratoire de Chimie Moléculaire, CNRS, Ecole Polytechnique, 91128 Palaiseau, France
| | - Audrey Auffrant
- Laboratoire de Chimie Moléculaire, CNRS, Ecole Polytechnique, 91128 Palaiseau, France
| | - Grégory Nocton
- Laboratoire de Chimie Moléculaire, CNRS, Ecole Polytechnique, 91128 Palaiseau, France
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25
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Kefalidis CE, Perrin L, Burns CJ, Berg DJ, Maron L, Andersen RA. Can a pentamethylcyclopentadienyl ligand act as a proton-relay in f-element chemistry? Insights from a joint experimental/theoretical study. Dalton Trans 2015; 44:2575-87. [PMID: 25340677 DOI: 10.1039/c4dt02387k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Isomerisation of buta-1,2-diene to but-2-yne by (Me(5)C(5))(2)Yb is a thermodynamically favourable reaction, with the Δ(r)G° estimated from experimental data at 298 K to be -3.0 kcal mol(-1). It proceeds in hydrocarbon solvents with a pseudo first-order rate constant of 6.4 × 10(-6) s(-1) and 7.4 × 10(-5) s(-1) in C(6)D(12) and C(6)D(6), respectively, at 20 °C. This 1,3-hydrogen shift is formally forbidden by symmetry and has to occur by an alternative pathway. The proposed mechanism for buta-1,2-diene to but-2-yne isomerisation by (Me(5)C(5))(2)Yb involves coordination of methylallene (buta-1,2-diene) to (Me(5)C(5))(2)Yb, and deprotonation of methylallene by one of the Me(5)C(5) ligands followed by protonation of the terminal methylallenyl carbon to yield the known coordination compound (Me(5)C(5))(2)Yb(η(2)-MeC[triple bond, length as m-dash]CMe). Computationally, this mechanism is not initiated by a single electron transfer step, and the ytterbium retains its oxidation state (II) throughout the reactivity. Experimentally, the influence of the metal centre is discussed by comparison with the reaction of (Me(5)C(5))(2)Ca towards buta-1,2-diene, and (Me(5)C(5))(2)Yb with ethylene. The mechanism by which the Me(5)C(5) acts as a proton-relay within the coordination sphere of a metal also rationalises the reactivity of (i) (Me(5)C(5))(2)Eu(OEt(2)) with phenylacetylene, (ii) (Me(5)C(5))(2)Yb(OEt(2)) with phenylphosphine and (iii) (Me(5)C(5))(2)U(NPh)(2) with H(2) to yield (Me(5)C(5))(2)U(HNPh)(2). In the latter case, the computed mechanism is the heterolytic activation of H(2) by (Me(5)C(5))(2)U(NPh)(2) to yield (Me(5)C(5))(2)U(H)(HNPh)(NPh), followed by a hydrogen transfer from uranium back to the imido nitrogen atom using one Me(5)C(5) ligand as a proton-relay. The overall mechanism by which hydrogen shifts using a pentamethylcyclopentadienyl ligand as a proton-relay is named Carambole in reference to carom billiards.
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Affiliation(s)
- Christos E Kefalidis
- LPCNO, CNRS & INSA, Université Paul Sabatier, 135 Avenue de Rangueil, Toulouse 31077, France.
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26
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Selikhov AN, Mahrova TV, Cherkasov AV, Fukin GK, Larionova J, Long J, Trifonov AA. Base-Free Lanthanoidocenes(II) Coordinated by Bulky Pentabenzylcyclopentadienyl Ligands. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00243] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander N. Selikhov
- Institute of Organometallic Chemistry of Russian Academy of Scienes, Tropinina 49, GSP-445, 630950, Nizhny Novgorod, Russia
| | - Tatyana V. Mahrova
- Institute of Organometallic Chemistry of Russian Academy of Scienes, Tropinina 49, GSP-445, 630950, Nizhny Novgorod, Russia
| | - Anton V. Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Scienes, Tropinina 49, GSP-445, 630950, Nizhny Novgorod, Russia
| | - Georgy K. Fukin
- Institute of Organometallic Chemistry of Russian Academy of Scienes, Tropinina 49, GSP-445, 630950, Nizhny Novgorod, Russia
- Nizhny Novgorod State University, Gagarina 23, 603950, Nizhny Novgorod, Russia
| | - Joulia Larionova
- Institut
Charles Gerhardt Montpellier, UMR 5253 CNRS-UM2-ENSCM-UM1, Chimie
Moléculaire et Organisation du Solide, Université Montpellier II, Place E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Jêrome Long
- Institut
Charles Gerhardt Montpellier, UMR 5253 CNRS-UM2-ENSCM-UM1, Chimie
Moléculaire et Organisation du Solide, Université Montpellier II, Place E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Scienes, Tropinina 49, GSP-445, 630950, Nizhny Novgorod, Russia
- Nizhny Novgorod State University, Gagarina 23, 603950, Nizhny Novgorod, Russia
- Institute of Organoelement Compounds of Russian Academy of Scienes, Vavilova Street 28, 119334, Moscow, Russia
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27
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Wang JM, Yu SB, Li ZM, Wang QR, Li ZT. Mechanism of samarium-catalyzed 1,5-regioselective azide-alkyne [3 + 2]-cycloaddition: a quantum mechanical investigation. J Phys Chem A 2015; 119:1359-68. [PMID: 25642804 DOI: 10.1021/jp5104615] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mechanism of the samarium-catalyzed 1,5-regioselective azide-alkyne [3 + 2]-cycloaddition (SmAAC) reaction has been examined with quantum mechanical calculations at the B3LYP/6-31+G(d,p) level of theory with ECP51MWB on Sm. Four stepwise pathways were located, with two leading to the 5-endocyclic 1,5-disubstituted 1,2,3-triazole product PSmL2 (paths 1 and 2) and the other two to the exocyclic product ExoPSmCl2 (path 3) as well as 1,4-disubstituted 1,2,3-triazole RegPSmL2 (path 4), respectively. Among them, path 2 (R-COM1-TS12-COM2-TS23-COM3-TS3P-PSmL2) is the most favored one both in the gas phase and in toluene solution, which is in good agreement with the experimental data. Moreover, 1,1-insertion forming COM2 in path 2 is the rate-determining step. The computational results also infer that the participation of samarium catalyst changes the distribution of the electrostatic potential on the reactants' surface, which determines the polarization direction of the reactants and formation of different intermediates (COM1 and RegCOM1), and finally affects the regioselectivity. When solvent corrections for toluene are considered, the 1,1-insertion process is discouraged, while the intramolecular [1,3]-shift reaction is facilitated.
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Affiliation(s)
- Jing-Mei Wang
- Research Centre for Analysis & Measurement and ‡Department of Chemistry, Fudan University , Shanghai 200433, China
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28
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Hernán-Gómez A, Herd E, Uzelac M, Cadenbach T, Kennedy AR, Borilovic I, Aromı́ G, Hevia E. Zincate-Mediated Arylation Reactions of Acridine: Pre- and Postarylation Structural Insights. Organometallics 2015. [DOI: 10.1021/om501251q] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Alberto Hernán-Gómez
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, U.K. G1 1XL
| | - Emma Herd
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, U.K. G1 1XL
| | - Marina Uzelac
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, U.K. G1 1XL
| | - Thomas Cadenbach
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, U.K. G1 1XL
| | - Alan R. Kennedy
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, U.K. G1 1XL
| | - Ivana Borilovic
- Departament
de Quı́mica Inorgànica and Institut de Nanociència
i Nanotecnologia, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Guillem Aromı́
- Departament
de Quı́mica Inorgànica and Institut de Nanociència
i Nanotecnologia, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Eva Hevia
- WestCHEM,
Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, U.K. G1 1XL
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29
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Selikhov AN, Cherkasov AV, Fukin GK, Trifonov AA, del Rosal I, Maron L. Amido Analogues of Nonbent Lanthanide (II) and Calcium Metallocenes. Heterolytic Cleavage of π-Bond Ln–Carbazolyl Ligand Promoted by Lewis Base Coordination. Organometallics 2015. [DOI: 10.1021/om500572y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Alexander N. Selikhov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
- Nizhny Novgorod State University, Gagarina 23, 603950, Nizhny Novgorod, Russia
| | - Anton V. Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
- Nizhny Novgorod State University, Gagarina 23, 603950, Nizhny Novgorod, Russia
| | - Georgy K. Fukin
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
- Nizhny Novgorod State University, Gagarina 23, 603950, Nizhny Novgorod, Russia
| | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, 49 Tropinina str., GSP-445, 630950, Nizhny Novgorod, Russia
- Nizhny Novgorod State University, Gagarina 23, 603950, Nizhny Novgorod, Russia
- Institute of Organoelement Compounds of Russian Academy of Scienes, Vavilova str. 28, 119334, Moscow, Russia
| | - Iker del Rosal
- Université de Toulouse, INSA, UPS, CNRS-UMR5215, LPCNO, Avenue de Rangueil 135, 31077 Toulouse, France
| | - Laurent Maron
- Université de Toulouse, INSA, UPS, CNRS-UMR5215, LPCNO, Avenue de Rangueil 135, 31077 Toulouse, France
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30
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Nocton G, Ricard L. Reversible C–C coupling in phenanthroline complexes of divalent samarium and thulium. Chem Commun (Camb) 2015; 51:3578-81. [DOI: 10.1039/c5cc00289c] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The phenanthroline adducts of organosamarium and organothulium fragments feature a reversible C–C bond on the phenanthroline ligand.
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Affiliation(s)
- Grégory Nocton
- Laboratoire de Chimie Moléculaire
- CNRS
- Ecole polytechnique
- Palaiseau
- France
| | - Louis Ricard
- Laboratoire de Chimie Moléculaire
- CNRS
- Ecole polytechnique
- Palaiseau
- France
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31
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Kahlfuss C, Métay E, Duclos MC, Lemaire M, Milet A, Saint-Aman E, Bucher C. Chemically and Electrochemically Triggered Assembly of Viologen Radicals: Towards Multiaddressable Molecular Switches. Chemistry 2014; 21:2090-106. [DOI: 10.1002/chem.201405157] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Indexed: 12/23/2022]
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32
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Deacon GB, Junk PC, Wang J, Werner D. Reactivity of Bulky Formamidinatosamarium(II or III) Complexes with C═O and C═S Bonds. Inorg Chem 2014; 53:12553-63. [DOI: 10.1021/ic502181g] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Glen B. Deacon
- School of Chemistry, Monash University, Victoria, 3800, Australia
| | - Peter C. Junk
- College of Science, Technology & Engineering, James Cook University, Townsville, Queensland 4811, Australia
| | - Jun Wang
- School of Chemistry, Monash University, Victoria, 3800, Australia
- College of Science, Technology & Engineering, James Cook University, Townsville, Queensland 4811, Australia
| | - Daniel Werner
- School of Chemistry, Monash University, Victoria, 3800, Australia
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33
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Kefalidis CE, Essafi S, Perrin L, Maron L. Qualitative Estimation of the Single-Electron Transfer Step Energetics Mediated by Samarium(II) Complexes: A “SOMO–LUMO Gap” Approach. Inorg Chem 2014; 53:3427-33. [DOI: 10.1021/ic402837n] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Christos E. Kefalidis
- Université de Toulouse et CNRS, INSA, UPS, CNRS,
UMR 5215, LPCNO, 135 Avenue
de Rangueil, F-31077 Toulouse, France
| | - Stéphanie Essafi
- School of Chemistry and
Centre for Computational Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, United Kingdom
| | - Lionel Perrin
- Université de Toulouse et CNRS, INSA, UPS, CNRS,
UMR 5215, LPCNO, 135 Avenue
de Rangueil, F-31077 Toulouse, France
| | - Laurent Maron
- Université de Toulouse et CNRS, INSA, UPS, CNRS,
UMR 5215, LPCNO, 135 Avenue
de Rangueil, F-31077 Toulouse, France
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34
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Edelmann FT. Lanthanides and actinides: Annual survey of their organometallic chemistry covering the year 2012. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2013.11.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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35
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Rare Earth Arene-Bridged Complexes Obtained by Reduction of Organometallic Precursors. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/b978-0-444-63256-2.00266-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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36
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Nocton G, Ricard L. N-aromatic heterocycle adducts of bulky [1,2,4-(Me3C)3C5H2]2Sm: synthesis, structure and solution analysis. Dalton Trans 2014; 43:4380-7. [DOI: 10.1039/c3dt52641k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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37
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Yang S, Zhu X, Zhou S, Wang S, Feng Z, Wei Y, Miao H, Guo L, Wang F, Zhang G, Gu X, Mu X. Synthesis, structure, and catalytic activity of novel trinuclear rare-earth metal amido complexes incorporating μ–η5:η1bonding indolyl and μ3-oxo groups. Dalton Trans 2014; 43:2521-33. [DOI: 10.1039/c3dt51107c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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38
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Bogart JA, Lewis AJ, Medling SA, Piro NA, Carroll PJ, Booth CH, Schelter EJ. Homoleptic Cerium(III) and Cerium(IV) Nitroxide Complexes: Significant Stabilization of the 4+ Oxidation State. Inorg Chem 2013; 52:11600-7. [DOI: 10.1021/ic401974t] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Justin A. Bogart
- P. Roy and Diana T. Vagelos
Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Andrew J. Lewis
- P. Roy and Diana T. Vagelos
Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Scott A. Medling
- Chemical Sciences
Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Nicholas A. Piro
- P. Roy and Diana T. Vagelos
Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- P. Roy and Diana T. Vagelos
Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Corwin H. Booth
- Chemical Sciences
Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Eric J. Schelter
- P. Roy and Diana T. Vagelos
Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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39
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Bousrez G, Jaroschik F, Martinez A, Harakat D, Nicolas E, Le Goff XF, Szymoniak J. Reactivity differences between 2,4- and 2,5-disubstituted zirconacyclopentadienes: a highly selective and general approach to 2,4-disubstituted phospholes. Dalton Trans 2013; 42:10997-1004. [PMID: 23797680 DOI: 10.1039/c3dt51158h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Mixtures of 2,4- and 2,5-disubstituted zirconacyclopentadienes were obtained by the reductive dimerisation of terminal alkynes using the Cp2ZrCl2/lanthanum system. Reactions of dihalophosphines with these mixtures afforded selectively the corresponding 2,4-disubstituted phospholes and 1,4-disubstituted butadienes. A new series of phospholes was characterized by multi-nuclear NMR spectroscopy and X-ray analysis. A possible explanation for the observed selectivity was obtained from X-ray studies and DFT analysis of the intermediate zirconacyclopentadienes.
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Affiliation(s)
- Guillaume Bousrez
- Institut de Chimie Moléculaire de Reims, UMR CNRS 7312, Université de Reims, BP 1039, 51687 Reims, France
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40
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Labouille S, Clavaguéra C, Nief F. Theoretical Insights into the Nature of Divalent Lanthanide–Ligand Interactions. Organometallics 2012. [DOI: 10.1021/om301018u] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stéphanie Labouille
- Laboratoire
Hétéroéléments et Coordination and ‡Laboratoire des
Mécanismes Réactionnels, Department of
Chemistry, Ecole Polytechnique, CNRS, 91128
Palaiseau, France
| | - Carine Clavaguéra
- Laboratoire
Hétéroéléments et Coordination and ‡Laboratoire des
Mécanismes Réactionnels, Department of
Chemistry, Ecole Polytechnique, CNRS, 91128
Palaiseau, France
| | - François Nief
- Laboratoire
Hétéroéléments et Coordination and ‡Laboratoire des
Mécanismes Réactionnels, Department of
Chemistry, Ecole Polytechnique, CNRS, 91128
Palaiseau, France
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41
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Dugan TR, Bill E, MacLeod KC, Christian GJ, Cowley RE, Brennessel WW, Ye S, Neese F, Holland PL. Reversible C–C Bond Formation between Redox-Active Pyridine Ligands in Iron Complexes. J Am Chem Soc 2012. [DOI: 10.1021/ja305679m] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Thomas R. Dugan
- Department of Chemistry, University of Rochester, Rochester, New York
| | - Eckhard Bill
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
| | - K. Cory MacLeod
- Department of Chemistry, University of Rochester, Rochester, New York
| | - Gemma J. Christian
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
| | - Ryan E. Cowley
- Department of Chemistry, University of Rochester, Rochester, New York
| | | | - Shengfa Ye
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
| | - Frank Neese
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
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