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Nees S, Beer H, Just P, Teichmeier LM, Christoffer LE, Guljam A, Kushik, Braunschweig H, Hering-Junghans C. On the Reactivity of Mes*P(PMe 3 ) towards Aluminum(I) Compounds - Evidence for the Intermediate Formation of Phosphaalumenes. Chempluschem 2023; 88:e202300078. [PMID: 36824017 DOI: 10.1002/cplu.202300078] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/22/2023] [Accepted: 02/23/2023] [Indexed: 02/25/2023]
Abstract
Phosphaalumenes are the heavier isoelectronic analogs of alkynes and have eluded facile synthesis until recently. We have reported that the combination of a phosphinidene transfer agent, Ar TerP(PMe3 ) (Ar Ter=2,6-Ar2 -C6 H3 ), with (Cp*Al)4 (Cp*=C5 (CH3 )5 ) afforded the phosphaalumenes Ar TerPAlCp* as isolable, violet, thermally stable compounds. In here we describe attempts to utilize Mes*P(PMe3 ) (Mes*=2,4,6-tBu3 -C6 H2 ) as a phosphinidene source in combination with different Al(I) precursors, namely Dip NacnacAl (Dip Nacnac=HC[C(Me)NDip]2 , Dip=2,6-iPr2 -C6 H3 ), (Cp*Al)4 and Cp3t Al (Cp3t =1,2,4-tBu3 -C5 H2 ). In all cases the formation of phosphaalumenes was not observed, however, their intermediate formation is indicated by formation of the dimer [Cp*Al(μ-PMes*)]2 (2) and C-H-bond activation products along the putative P=Al bond, giving unusual 1,2-P,Al-tetrahydronaphtalene derivatives 1 and 4, clearly underlining the role the sterically demanding group on phosphorus plays in these transformations. The reactivity studies are supported by theoretical studies, demonstrating a thermodynamic preference for the C-H activation products. Additionally, we show that there are potential pitfalls in the synthesis of Cp*2 AlH, the precursor to make (Cp*Al)4 and give recommendations how to circumvent these.
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Affiliation(s)
- Samuel Nees
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Henrik Beer
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Philip Just
- Institute of Chemistry, University of Rostock, Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Leon M Teichmeier
- Institute of Chemistry, University of Rostock, Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Leif E Christoffer
- Institute of Chemistry, University of Rostock, Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Ailina Guljam
- Institute of Chemistry, University of Rostock, Albert-Einstein-Straße 3a, 18059, Rostock, Germany
| | - Kushik
- Leibniz-Institut für Katalyse e.V. (LIKAT), Albert-Einstein-Straße 29a, 18059, Rostock, Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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2
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Bakewell C, Hobson K, Carmalt CJ. Exploring Equilibria between Aluminium(I) and Aluminium(III): The Formation of Dihydroalanes, Masked Dialumenes and Aluminium(I) Species. Angew Chem Int Ed Engl 2022; 61:e202205901. [PMID: 35474268 PMCID: PMC9401008 DOI: 10.1002/anie.202205901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Indexed: 11/08/2022]
Abstract
The design of new reductive routes to low oxidation state aluminium (Al) compounds offers the opportunity to better understand redox processes at the metal centre and develop reactivity accordingly. Here, a monomeric AlI compound acts as a stoichiometric reducing agent towards a series of AlIII dihydrides, leading to the formation of new low oxidation state species including symmetric and asymmetric dihydrodialanes, and a masked dialumene. These compounds are formed by a series of equilibrium processes involving AlI, AlII and AlIII species and product formation can be manipulated by fine‐tuning the reaction conditions. The transient formation of monomeric AlI compounds is proposed: this is shown to be energetically viable by computational (DFT) investigations and reactivity studies show support for the formation of AlI species. Importantly, despite the potential for the equilibrium mixtures to lead to ill‐defined reactivity, controlled reactivity of these low oxidation state species is observed.
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Affiliation(s)
- Clare Bakewell
- Department of Chemistry King's College London 7 Trinity Street London SE1 1DB UK
- Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ UK
| | - Katie Hobson
- Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ UK
| | - Claire J. Carmalt
- Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ UK
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3
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4
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Bakewell C, Hobson K, Carmalt CJ. Exploring Equilibria between Aluminium(I) and Aluminium(III): The Formation of Dihydroalanes, Masked Dialumenes and Aluminium(I) Species. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202205901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Clare Bakewell
- Department of Chemistry King's College London 7 Trinity Street London SE1 1DB UK
- Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ UK
| | - Katie Hobson
- Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ UK
| | - Claire J. Carmalt
- Department of Chemistry University College London 20 Gordon Street London WC1H 0AJ UK
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5
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Zhang X, Liu LL. A Free Aluminylene with Diverse σ‐Donating and Doubly σ/π‐Accepting Ligand Features for Transition Metals**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111975] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Xin Zhang
- Department of Chemistry and Shenzhen Grubbs Institute Southern University of Science and Technology Shenzhen 518055 China
| | - Liu Leo Liu
- Department of Chemistry and Shenzhen Grubbs Institute Southern University of Science and Technology Shenzhen 518055 China
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6
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Zhang X, Liu LL. A Free Aluminylene with Diverse σ-Donating and Doubly σ/π-Accepting Ligand Features for Transition Metals*. Angew Chem Int Ed Engl 2021; 60:27062-27069. [PMID: 34614275 DOI: 10.1002/anie.202111975] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/26/2021] [Indexed: 12/15/2022]
Abstract
We report herein the synthesis, characterization, and coordination chemistry of a free N-aluminylene, namely a carbazolylaluminylene 2 b. This species is prepared via a reduction reaction of the corresponding carbazolyl aluminium diiodide. The coordination behavior of 2 b towards transition metal centers (W, Cr) is shown to afford a series of novel aluminylene complexes 3-6 with diverse coordination modes. We demonstrate that the tri-active ambiphilic Al center in 2 b can behave as: 1. a σ-donating and doubly π-accepting ligand; 2. a σ-donating, σ-accepting and π-accepting ligand; and 3. a σ-donating and doubly σ-accepting ligand. Additionally, we show ligand exchange at the aluminylene center providing access to the modulation of electronic properties of transition metals without changing the coordinated atoms. Investigations of 2 b with IDippCuCl (IDipp=1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene) show an unprecedented aluminylene-alumanyl transformation leading to a rare terminal Cu-alumanyl complex 8. The electronic structures of such complexes and the mechanism of the aluminylene-alumanyl transformation are investigated through density functional theory (DFT) calculations.
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Affiliation(s)
- Xin Zhang
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Liu Leo Liu
- Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China
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7
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Falconer RL, Byrne KM, Nichol GS, Krämer T, Cowley MJ. Reversible Dissociation of a Dialumene*. Angew Chem Int Ed Engl 2021; 60:24702-24708. [PMID: 34520616 PMCID: PMC8596890 DOI: 10.1002/anie.202111385] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Indexed: 11/17/2022]
Abstract
Dialumenes are neutral AlI compounds with Al=Al multiple bonds. We report the isolation of an amidophosphine-supported dialumene. Our X-ray crystallographic, spectroscopic, and computational DFT analyses reveal a long and extreme trans-bent Al=Al bond with a low dissociation energy and bond order. In solution, the dialumene can dissociate into monomeric AlI species. Reactivity studies reveal two modes of reaction: as dialumene or as aluminyl monomers.
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Affiliation(s)
| | - Keelan M. Byrne
- Department of ChemistryMaynooth UniversityMaynoothCo. KildareIreland
| | | | - Tobias Krämer
- Department of ChemistryMaynooth UniversityMaynoothCo. KildareIreland
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8
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9
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Yonesato K, Yamazoe S, Yokogawa D, Yamaguchi K, Suzuki K. A Molecular Hybrid of an Atomically Precise Silver Nanocluster and Polyoxometalates for H
2
Cleavage into Protons and Electrons. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202106786] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kentaro Yonesato
- Department of Applied Chemistry School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Seiji Yamazoe
- Department of Chemistry Graduate School of Science Tokyo Metropolitan University 1-1 Minami Osawa, Hachioji Tokyo 192-0397 Japan
- Precursory Research for Embryonic Science and Technology (PRESTO) Japan Science and Technology Agency (JST) 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
| | - Daisuke Yokogawa
- Graduate School of Arts and Science The University of Tokyo 3-8-1 Komaba, Meguro-ku Tokyo 153-8902 Japan
| | - Kazuya Yamaguchi
- Department of Applied Chemistry School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Kosuke Suzuki
- Department of Applied Chemistry School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656 Japan
- Precursory Research for Embryonic Science and Technology (PRESTO) Japan Science and Technology Agency (JST) 4-1-8 Honcho Kawaguchi Saitama 332-0012 Japan
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10
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Yonesato K, Yamazoe S, Yokogawa D, Yamaguchi K, Suzuki K. A Molecular Hybrid of an Atomically Precise Silver Nanocluster and Polyoxometalates for H 2 Cleavage into Protons and Electrons. Angew Chem Int Ed Engl 2021; 60:16994-16998. [PMID: 34051034 DOI: 10.1002/anie.202106786] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Indexed: 12/13/2022]
Abstract
Atomically precise silver (Ag) nanoclusters are promising materials as catalysts, photocatalysts, and sensors because of their unique structures and mixed-valence states (Ag+ /Ag0 ). However, their low stability hinders the in-depth study of their intrinsic reactivity and catalytic property accompanying their redox processes. Herein, we demonstrate that a molecular hybrid of an atomically precise {Ag27 }17+ nanocluster and polyoxometalates (POMs) can efficiently cleave H2 into protons and electrons. The Ag nanocluster accommodates electrons through the redox reaction from {Ag27 }17+ to {Ag27 }13+ , and the POM ligands play the following important roles: (i) a significant stabilization of the typically unstable Ag nanocluster to preserve its structure during the redox reaction with H2 , (ii) formation of a unique interface between the Ag nanocluster and metal oxides for efficient H2 cleavage, and (iii) storage of the generated protons on the negatively charged basic surface.
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Affiliation(s)
- Kentaro Yonesato
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Seiji Yamazoe
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo, 192-0397, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
| | - Daisuke Yokogawa
- Graduate School of Arts and Science, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902, Japan
| | - Kazuya Yamaguchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kosuke Suzuki
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama, 332-0012, Japan
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11
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Sugita K, Nakano R, Yamashita M. Cycloaddition of Dialkylalumanyl Anion toward Unsaturated Hydrocarbons in (1+2) and (1+4) Modes. Chemistry 2020; 26:2174-2177. [DOI: 10.1002/chem.201905830] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Indexed: 11/05/2022]
Affiliation(s)
- Kengo Sugita
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Aichi Japan
| | - Ryo Nakano
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Aichi Japan
| | - Makoto Yamashita
- Department of Molecular and Macromolecular Chemistry Graduate School of Engineering Nagoya University Furo-cho Chikusa-ku Nagoya 464-8603 Aichi Japan
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12
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Hooper TN, Lau S, Chen W, Brown RK, Garçon M, Luong K, Barrow NS, Tatton AS, Sackman GA, Richardson C, White AJP, Cooper RI, Edwards AJ, Casely IJ, Crimmin MR. The partial dehydrogenation of aluminium dihydrides. Chem Sci 2019; 10:8083-8093. [PMID: 31762968 PMCID: PMC6855256 DOI: 10.1039/c9sc02750e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 08/12/2019] [Indexed: 11/21/2022] Open
Abstract
The reactions of a series of β-diketiminate stabilised aluminium dihydrides with ruthenium bis(phosphine), palladium bis(phosphine) and palladium cyclopentadienyl complexes is reported.
The reactions of a series of β-diketiminate stabilised aluminium dihydrides with ruthenium bis(phosphine), palladium bis(phosphine) and palladium cyclopentadienyl complexes is reported. In the case of ruthenium, alane coordination occurs with no evidence for hydrogen loss resulting in the formation of ruthenium complexes with a pseudo–octahedral geometry and cis-relation of phosphine ligands. These new ruthenium complexes have been characterised by multinuclear and variable temperature NMR spectroscopy, IR spectroscopy and single crystal X-ray diffraction. In the case of palladium, a series of structural snapshots of alane dehydrogenation have been isolated and crystallographically characterised. Variation of the palladium precursor and ligand on aluminium allows kinetic control over reactivity and isolation of intermetallic complexes that contain new Pd–Al and Pd–Pd interactions. These complexes differ by the ratio of H : Al (2 : 1, 1.5 : 1 and 1 : 1) with lower hydride content species forming with dihydrogen loss. A combination of X-ray and neutron diffraction studies have been used to interrogate the structures and provide confidence in the assignment of the number and position of hydride ligands. 27Al MAS NMR spectroscopy and calculations (DFT, QTAIM) have been used to gain an understanding of the dehydrogenation processes. The latter provide evidence for dehydrogenation being accompanied by metal–metal bond formation and an increased negative charge on Al due to the covalency of the new metal–metal bonds. To the best of our knowledge, we present the first structural information for intermediate species in alane dehydrogenation including a rare neutron diffraction study of a palladium–aluminium hydride complex. Furthermore, as part of these studies we have obtained the first SS 27Al NMR data on an aluminium(i) complex. Our findings are relevant to hydrogen storage, materials chemistry and catalysis.
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Affiliation(s)
- Thomas N Hooper
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Samantha Lau
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Wenyi Chen
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Ryan K Brown
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Martí Garçon
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Karen Luong
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Nathan S Barrow
- Johnson Matthey Technology Centre , Blounts Court, Sonning Common , Reading , RG4 9NH , UK
| | - Andrew S Tatton
- Department of Materials , University of Oxford , OX1 3PH , UK
| | - George A Sackman
- Australian Centre for Neutron Scattering , Australian Nuclear Science and Technology Organisation , Australia.,Chemical Crystallography , Department of Chemistry , University of Oxford , 12 Mansfield Road , Oxford , OX1 3TA , UK
| | | | - Andrew J P White
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Richard I Cooper
- Chemical Crystallography , Department of Chemistry , University of Oxford , 12 Mansfield Road , Oxford , OX1 3TA , UK
| | - Alison J Edwards
- Australian Centre for Neutron Scattering , Australian Nuclear Science and Technology Organisation , Australia
| | - Ian J Casely
- Johnson Matthey Technology Centre , Blounts Court, Sonning Common , Reading , RG4 9NH , UK
| | - Mark R Crimmin
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
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13
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Schwamm RJ, Anker MD, Lein M, Coles MP. Reduction vs. Addition: The Reaction of an Aluminyl Anion with 1,3,5,7-Cyclooctatetraene. Angew Chem Int Ed Engl 2018; 58:1489-1493. [PMID: 30548141 DOI: 10.1002/anie.201811675] [Citation(s) in RCA: 145] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 11/13/2018] [Indexed: 11/10/2022]
Abstract
The potassium aluminyl complex K[Al(NONAr )] (NON=NONAr =[O(SiMe2 NAr)2 ]2- , Ar=2,6-iPr2 C6 H3 ) reacts with 1,3,5,7-cyclooctatetraene (COT) to give K[Al(NONAr )(COT)]. The COT-ligand is present in the asymmetric unit as a planar μ2 -η2 :η8 -bridge between Al and K, with additional K⋅⋅⋅π-aryl interactions to neighboring molecules that generate a helical chain. DFT calculations indicate significant aromatic character, consistent with reduction to [COT]2- . Addition of 18-crown-6 causes a rearrangement of the C8 -carbocycle to form the isomeric 9-aluminabicyclo[4.2.1]nona-2,4,7-triene anion.
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Affiliation(s)
- Ryan J Schwamm
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, 6012, New Zealand
| | - Mathew D Anker
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, 6012, New Zealand
| | - Matthias Lein
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, 6012, New Zealand
| | - Martyn P Coles
- School of Chemical and Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington, 6012, New Zealand
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14
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Stennett TE, Mattock JD, Pentecost L, Vargas A, Braunschweig H. Chelated Diborenes and Their Inverse-Electron-Demand Diels-Alder Reactions with Dienes. Angew Chem Int Ed Engl 2018; 57:15276-15281. [PMID: 30204298 DOI: 10.1002/anie.201809217] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Indexed: 01/06/2023]
Abstract
A doubly base-stabilised diborane based on a benzylphosphine linker was prepared by a salt elimination reaction between 2-LiC6 H4 CH2 PCy2 ⋅Et2 O and B2 Br4 . This compound was reduced with KC8 to its corresponding diborene, with the benzylphosphine forming a five-membered chelate. The diborene reacts with butadiene, 2-trimethylsiloxy-1,3-butadiene, and isoprene to form 4,5-diboracyclohexenes, which interconvert between their 1,1- (geminal) and 1,2- (vicinal) chelated isomers. The 1,1-chelated diborene undergoes a halide-catalysed isomerisation into its thermodynamically favoured 1,2-isomer, which undergoes Diels-Alder reactions more slowly than the kinetic product.
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Affiliation(s)
- Tom E Stennett
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany
| | - James D Mattock
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, Sussex, UK
| | - Leanne Pentecost
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, Sussex, UK
| | - Alfredo Vargas
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton, BN1 9QJ, Sussex, UK
| | - Holger Braunschweig
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97070, Würzburg, Germany
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15
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Stennett TE, Mattock JD, Pentecost L, Vargas A, Braunschweig H. Chelatisierte Diborene und ihre Diels‐Alder‐Reaktionen mit Dienen unter inversem Elektronenbedarf. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809217] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Tom E. Stennett
- Institute für Anorganische ChemieJulius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
| | - James D. Mattock
- Department of ChemistrySchool of Life SciencesUniversity of Sussex Brighton BN1 9QJ Sussex Großbritannien
| | - Leanne Pentecost
- Department of ChemistrySchool of Life SciencesUniversity of Sussex Brighton BN1 9QJ Sussex Großbritannien
| | - Alfredo Vargas
- Department of ChemistrySchool of Life SciencesUniversity of Sussex Brighton BN1 9QJ Sussex Großbritannien
| | - Holger Braunschweig
- Institute für Anorganische ChemieJulius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97070 Würzburg Deutschland
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16
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Bag P, Weetman C, Inoue S. Isolierung schwer fassbarer Komplexe mit einer Aluminium-Element-Mehrfachbindung: Am Horizont zeichnet sich eine neue Aluminiumchemie ab. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803900] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Prasenjit Bag
- Department Chemie; WACKER-Institute of Silicon Chemistry and Catalysis Research Center; Technische Universität München (TUM); Lichtenbergstraße 4 85748 Garching bei München Deutschland
| | - Catherine Weetman
- Department Chemie; WACKER-Institute of Silicon Chemistry and Catalysis Research Center; Technische Universität München (TUM); Lichtenbergstraße 4 85748 Garching bei München Deutschland
| | - Shigeyoshi Inoue
- Department Chemie; WACKER-Institute of Silicon Chemistry and Catalysis Research Center; Technische Universität München (TUM); Lichtenbergstraße 4 85748 Garching bei München Deutschland
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17
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Bag P, Weetman C, Inoue S. Experimental Realisation of Elusive Multiple-Bonded Aluminium Compounds: A New Horizon in Aluminium Chemistry. Angew Chem Int Ed Engl 2018; 57:14394-14413. [DOI: 10.1002/anie.201803900] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Prasenjit Bag
- Department of Chemistry; WACKER-Institute of Silicon Chemistry and Catalysis Research Center; Technische Universität München (TUM); Lichtenbergstraße 4 85748 Garching bei München Germany
| | - Catherine Weetman
- Department of Chemistry; WACKER-Institute of Silicon Chemistry and Catalysis Research Center; Technische Universität München (TUM); Lichtenbergstraße 4 85748 Garching bei München Germany
| | - Shigeyoshi Inoue
- Department of Chemistry; WACKER-Institute of Silicon Chemistry and Catalysis Research Center; Technische Universität München (TUM); Lichtenbergstraße 4 85748 Garching bei München Germany
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Kosai T, Iwamoto T. Cleavage of Two Hydrogen Molecules by Boryldisilenes. Chemistry 2018; 24:7774-7780. [PMID: 29604135 DOI: 10.1002/chem.201801286] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Indexed: 12/17/2022]
Abstract
Activation of H2 by compounds of main-group elements has received considerable attention. Herein, we report synthesis of novel monoboryl- and monoamino-substituted disilenes and their characterization by a combination of NMR spectroscopy and single-crystal X-ray diffraction analysis. The monoboryldisilene reacts with two molecules of H2 to provide the corresponding trihydridodisilane and hydroborane, whereas the aminodisilene does not react with H2 under the same conditions. The present results together with our previous results indicate that the presence of the boryl-substituent on the Si=Si double bond is essential to activate the H2 molecule. The low lying empty 2p orbital on the boron atom that interacts effectively with the π*(Si=Si) orbital could be responsible for the activation of H2 .
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Affiliation(s)
- Tomoyuki Kosai
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan
| | - Takeaki Iwamoto
- Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan
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