1
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Shibutani Y, Kusumoto S, Nozaki K. Synthesis, Characterization, and Trapping of a Cyclic Diborylcarbene, an Electrophilic Carbene. J Am Chem Soc 2023. [PMID: 37354094 DOI: 10.1021/jacs.3c04933] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2023]
Abstract
A carbene bearing two geminal boryl substituents, called diborylcarbene (DBC), has been predicted to be highly Lewis acidic in sharp contrast to the well-studied persistent carbenes stabilized by π-donating substituents. Studies on DBC have been limited to either the base-trapping or theoretical calculations. Herein, we developed chemical equivalents for DBC, namely, K/X-diborylcarbenoids 2X (X = F or Cl). Treatment of 2F with Al(C6F5)3 yielded [AlF(C6F5)3]--stabilized DBC 1-FAl, which showed a significant low-field shift of the carbenoid carbon from 169 ppm (doublet, coupling with 19F) to 242 ppm (singlet). The loss of halogen was also detected through electrospray ionization time-of-flight mass spectrometry analysis of 2X only in the presence of Al(C6F5)3. Generated DBC 1 from 1-FAl or 2Cl was successfully trapped with excess amounts of trialkylphosphines (PR3, R = Me or Et), which afforded the corresponding DBC-PR3 adducts. In addition, the Lewis acidity of DBC 1 was evaluated both experimentally and theoretically to reveal that 1 is one of the most Lewis acidic species among neutral molecules.
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Affiliation(s)
- Yuki Shibutani
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Shuhei Kusumoto
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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2
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Seidel FW, Nozaki K. A Ni
0
σ‐Borane Complex Bearing a Rigid Bidentate Borane/Phosphine Ligand: Boryl Complex Formation by Oxidative Dehydrochloroborylation and Catalytic Activity for Ethylene Polymerization. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202111691] [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)
- Falk William Seidel
- Department of Chemistry and Biotechnology Graduate School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo Japan
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology Graduate School of Engineering The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo Japan
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3
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Sadek O, Le Gac A, Hidalgo N, Mallet-Ladeira S, Miqueu K, Bouhadir G, Bourissou D. Metal-Free Phosphorus-Directed Borylation of C(sp 2 )-H Bonds. Angew Chem Int Ed Engl 2022; 61:e202110102. [PMID: 34719849 DOI: 10.1002/anie.202110102] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 10/15/2021] [Indexed: 01/06/2023]
Abstract
Spectacular progress has recently been achieved in transition metal-catalyzed C-H borylation of phosphines as well as directed electrophilic C-H borylation. As shown here, P-directed electrophilic borylation provides a new, straightforward, and efficient access to phosphine-boranes. It operates under metal-free conditions and leverages simple, readily available substrates. It is applicable to a broad range of backbones (naphthyl, biphenyl, N-phenylpyrrole, binaphthyl, benzyl, naphthylmethyl) and gives facile access to various substitution patterns at boron (by varying the boron electrophile or post-derivatizing the borane moiety). NMR monitoring supports the involvement of P-stabilized borenium cations as key intermediates. DFT calculations reveal the existence and stabilizing effect of π-arene/boron interactions in the (biphenyl)(i-Pr)2 P→BBr2 + species.
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Affiliation(s)
- Omar Sadek
- CNRS/Université Paul Sabatier, Laboratoire Hetérochimie Fondamentale et Appliquée (LHFA, UMR 5069), 118 Route de Narbonne, 31062 Cedex 09, Toulouse, France
| | - Arnaud Le Gac
- CNRS/Université Paul Sabatier, Laboratoire Hetérochimie Fondamentale et Appliquée (LHFA, UMR 5069), 118 Route de Narbonne, 31062 Cedex 09, Toulouse, France
| | - Nereida Hidalgo
- CNRS/Université Paul Sabatier, Laboratoire Hetérochimie Fondamentale et Appliquée (LHFA, UMR 5069), 118 Route de Narbonne, 31062 Cedex 09, Toulouse, France
| | - Sonia Mallet-Ladeira
- Institut de Chimie de Toulouse (FR 2599), 118 Route de Narbonne, 31062 Cedex 09, Toulouse, France
| | - Karinne Miqueu
- CNRS/Université de Pau et des Pays de l'Adour, E2S-UPPA, Institut des Sciences Analytiques et Physico-Chimie pour l'Environnement et les Matériaux (IPREM, UMR 5254), Hélioparc, 2 Avenue du Président Angot, 64053, Pau Cedex 09, France
| | - Ghenwa Bouhadir
- CNRS/Université Paul Sabatier, Laboratoire Hetérochimie Fondamentale et Appliquée (LHFA, UMR 5069), 118 Route de Narbonne, 31062 Cedex 09, Toulouse, France
| | - Didier Bourissou
- CNRS/Université Paul Sabatier, Laboratoire Hetérochimie Fondamentale et Appliquée (LHFA, UMR 5069), 118 Route de Narbonne, 31062 Cedex 09, Toulouse, France
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4
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Sadek O, Le Gac A, Hidalgo N, Mallet‐Ladeira S, Miqueu K, Bouhadir G, Bourissou D. Metal‐Free Phosphorus‐Directed Borylation of C(sp
2
)−H Bonds. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202110102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Omar Sadek
- CNRS/Université Paul Sabatier Laboratoire Hetérochimie Fondamentale et Appliquée (LHFA, UMR 5069) 118 Route de Narbonne 31062 Cedex 09 Toulouse France
| | - Arnaud Le Gac
- CNRS/Université Paul Sabatier Laboratoire Hetérochimie Fondamentale et Appliquée (LHFA, UMR 5069) 118 Route de Narbonne 31062 Cedex 09 Toulouse France
| | - Nereida Hidalgo
- CNRS/Université Paul Sabatier Laboratoire Hetérochimie Fondamentale et Appliquée (LHFA, UMR 5069) 118 Route de Narbonne 31062 Cedex 09 Toulouse France
| | - Sonia Mallet‐Ladeira
- Institut de Chimie de Toulouse (FR 2599) 118 Route de Narbonne 31062 Cedex 09 Toulouse France
| | - Karinne Miqueu
- CNRS/Université de Pau et des Pays de l'Adour, E2S-UPPA Institut des Sciences Analytiques et Physico-Chimie pour l'Environnement et les Matériaux (IPREM, UMR 5254) Hélioparc 2 Avenue du Président Angot 64053 Pau Cedex 09 France
| | - Ghenwa Bouhadir
- CNRS/Université Paul Sabatier Laboratoire Hetérochimie Fondamentale et Appliquée (LHFA, UMR 5069) 118 Route de Narbonne 31062 Cedex 09 Toulouse France
| | - Didier Bourissou
- CNRS/Université Paul Sabatier Laboratoire Hetérochimie Fondamentale et Appliquée (LHFA, UMR 5069) 118 Route de Narbonne 31062 Cedex 09 Toulouse France
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5
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Seidel FW, Nozaki K. A Ni 0 σ-Borane Complex Bearing a Rigid Bidentate Borane/Phosphine Ligand: Boryl Complex Formation by Oxidative Dehydrochloroborylation and Catalytic Activity for Ethylene Polymerization. Angew Chem Int Ed Engl 2021; 61:e202111691. [PMID: 34854528 DOI: 10.1002/anie.202111691] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Indexed: 11/08/2022]
Abstract
While of interest, synthetically feasible access to boryl ligands and complexes remains limited, meaning such complexes remain underexploited in catalysis. For bidentate boryl ligands, oxidative addition of boranes to low-valent IrI or Pt0 are the only examples yet reported. As part of our interest in developing improved group 10 ethylene polymerization catalysts, we present here an optimized synthesis of a novel, rigid borane/phosphine ligand and its Ni0 σ-borane complex. From the latter, an unprecedented oxidative dehydrochloroborylation, to give a NiII boryl complex, was achieved. Furthermore, this new B/P ligand allowed the nickel-catalyzed polymerization of ethylene, which suggests that Ni0 σ-hydroborane complexes act as masked NiII boryl hydride reagents.
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Affiliation(s)
- Falk William Seidel
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, Japan
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, Japan
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6
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Lehnfeld F, Seidl M, Timoshkin AY, Scheer M. Synthesis and Reactivity of a Lewis‐Base‐Stabilized
tert
‐Butyl Arsanylborane: A Versatile Building Block for Arsenic‐Boron Oligomers. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100930] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Felix Lehnfeld
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Germany
| | - Michael Seidl
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Germany
| | - Alexey Y. Timoshkin
- Institute of Chemistry St. Petersburg State University 199034 Universitetskaya emb. 7/9 St. Petersburg Russia
| | - Manfred Scheer
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Germany
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7
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Cui J, Dietz M, Härterich M, Fantuzzi F, Lu W, Dewhurst RD, Braunschweig H. Diphosphino-Functionalized 1,8-Naphthyridines: a Multifaceted Ligand Platform for Boranes and Diboranes. Chemistry 2021; 27:15751-15756. [PMID: 34545966 PMCID: PMC9292315 DOI: 10.1002/chem.202102721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Indexed: 12/25/2022]
Abstract
A 1,8‐naphthyridine diphosphine (NDP) reacts with boron‐containing Lewis acids to generate complexes featuring a number of different naphthyridine bonding modes. When exposed to diborane B2Br4, NDP underwent self‐deprotonation to afford [NDP‐B2Br3]Br, an unsymmetrical diborane comprised of four fused rings. The reaction of two equivalents of monoborane BBr3 and NDP in a non‐polar solvent provided the simple phosphine‐borane adduct [NDP(BBr3)2], which then underwent intramolecular halide abstraction to furnish the salt [NDP‐BBr2][BBr4], featuring a different coordination mode from that of [NDP‐B2Br3]Br. Direct deprotonation of NDP by KHMDS or PhCH2K generates mono‐ and dipotassium reagents, respectively. The monopotassium reagent reacts with one or half an equivalent of B2(NMe2)2Cl2 to afford NDP‐based diboranes with three or four amino substituents.
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Affiliation(s)
- Jingjing Cui
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, P. R. China.,Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Maximilian Dietz
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Marcel Härterich
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Felipe Fantuzzi
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Physical and Theoretical Chemistry, Julius-Maximilians-Universität Würzburg, Emil-Fischer-Str. 42, 97074, Würzburg, Germany
| | - Wei Lu
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Rian D Dewhurst
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Holger Braunschweig
- Institute for Inorganic Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany.,Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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8
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Parvin N, Sen N, Muhasina PV, Tothadi S, Parameswaran P, Khan S. The diverse reactivity of NOBF 4 towards silylene, disilene, germylene and stannylene. Chem Commun (Camb) 2021; 57:5008-5011. [PMID: 33949489 DOI: 10.1039/d1cc01034d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The reactivity of NOBF4 towards silylene, disilene, germylene, stannylenes has been described. Smooth syntheses of compounds of composition [PhC(NtBu)2E(= O → BF3)N(SiMe3)2, E = Si (3) and Ge (4)] were accomplished from the corresponding tetrylenes. An unusual heterocycle (10) featuring B, Sn, N, P, and O atoms was obtained from the reaction with a stannylene, while a 1,2-vicinal anti addition of fluoride was observed with a disilene (12).
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Affiliation(s)
- Nasrina Parvin
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr Homi Bhabha Road, Pashan, Pune-411008, India.
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9
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10
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Rej S, Chatani N. Transient Imine as a Directing Group for the Metal-Free o-C-H Borylation of Benzaldehydes. J Am Chem Soc 2021; 143:2920-2929. [PMID: 33586953 DOI: 10.1021/jacs.0c13013] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Organoboron reagents are important synthetic intermediates and have wide applications in synthetic organic chemistry. The selective borylation strategies that are currently in use largely rely on the use of transition-metal catalysts. Hence, identifying much milder conditions for transition-metal-free borylation would be highly desirable. We herein present a unified strategy for the selective C-H borylation of electron-deficient benzaldehyde derivatives using a simple metal-free approach, utilizing an imine transient directing group. The strategy covers a wide spectrum of reactions and (i) even highly sterically hindered C-H bonds can be borylated smoothly, (ii) despite the presence of other potential directing groups, the reaction selectively occurs at the o-C-H bond of the benzaldehyde moiety, and (iii) natural products appended to benzaldehyde derivatives can also give the appropriate borylated products. Moreover, the efficacy of the protocol was confirmed by the fact that the reaction proceeds even in the presence of a series of external impurities.
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Affiliation(s)
- Supriya Rej
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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11
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Fritz M, Maser L, Ringler B, von Hänisch C, Langer R. Small Chains of Main Group Elements by BH
3
Adduct Formation of
t
Bu
2
E‐N(H)‐E
t
Bu
2
(E = P, As). Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Maximilian Fritz
- Department Chemistry Philipps‐Universität Marburg Hans‐Meerwein‐Str. 35032 Marburg Germany
| | - Leon Maser
- Institute of Chemistry, Natural Science Faculty II Martin‐Luther‐Universität Halle‐Wittenberg Kurt‐Mothes‐Str. 2 06120 Halle/S. Germany
| | - Benjamin Ringler
- Department Chemistry Philipps‐Universität Marburg Hans‐Meerwein‐Str. 35032 Marburg Germany
| | - Carsten von Hänisch
- Department Chemistry Philipps‐Universität Marburg Hans‐Meerwein‐Str. 35032 Marburg Germany
| | - Robert Langer
- Department Chemistry Philipps‐Universität Marburg Hans‐Meerwein‐Str. 35032 Marburg Germany
- Institute of Chemistry, Natural Science Faculty II Martin‐Luther‐Universität Halle‐Wittenberg Kurt‐Mothes‐Str. 2 06120 Halle/S. Germany
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12
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Dyke JM, Emsley JW, Greenacre VK, Levason W, Monzittu FM, Reid G, De Luca G. Tertiary Phosphine and Arsine Complexes of Phosphorus Pentafluoride: Synthesis, Properties, and Electronic Structures. Inorg Chem 2020; 59:4517-4526. [PMID: 32186860 DOI: 10.1021/acs.inorgchem.9b03630] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of PMe3 or PPh3 with PF5 in anhydrous CH2Cl2 or hexane forms the white, moisture-sensitive complexes [PF5(PR3)] (R = Me, Ph). Similar reactions involving the diphosphines o-C6H4(PR2)2 afford the complexes [PF4{o-C6H4(PR2)2}][PF6]. The X-ray structures of [PF5(PR3)] and [PF4{o-C6H4(PMe2)2}][PF6] show pseudo-octahedral fluorophosphorus centers. Multinuclear NMR spectra (1H, 19F{1H}, 31P{1H}) show that in solution in CH2Cl2/CD2Cl2 the structures determined crystallographically are the only species present for [PF5(PMe3)] and [PF4{o-C6H4(PMe2)2}][PF6] but that [PF5(PPh3)] and [PF4{o-C6H4(PPh2)2}][PF6] exhibit reversible dissociation of the phosphine at ambient temperatures, although exchange slows at low temperatures. The complex 19F{1H} and 31P{1H} NMR spectra have been analyzed, including those of the cation [PF4{o-C6H4(PMe2)2}]+, which is a second-order AA'XX'B2M spin system. The unstable [PF5(AsMe3)], which decomposes in a few hours at ambient temperatures, has also been isolated and spectroscopically characterized; neither AsPh3 nor SbEt3 forms similar complexes. The electronic structures of the PF5 complexes have been explored by DFT calculations. The DFT optimized geometries for [PF5(PMe3)], [PF5(PPh3)], and [PF4{o-C6H4(PMe2)2}]+ are in good agreement with their respective crystal structure geometries. DFT calculations on the PF5-L complexes reveal the P-L bond strength falls with L in the order PMe3 > PPh3 > AsMe3, consistent with the experimentally observed stabilities, and in the PF5-L complexes, electron transfer from L to PF5 on forming these complexes also follows the order PMe3 > PPh3 ≈ AsMe3.
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Affiliation(s)
- John M Dyke
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - James W Emsley
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | | | - William Levason
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | | | - Gillian Reid
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - Giuseppina De Luca
- Department of Chemistry and Chemical Technologies, University of Calabria, Arcavacata di Rende 87036, Italy
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13
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Raiser D, Sindlinger CP, Schubert H, Wesemann L. Ge=B π-Bonding: Synthesis and Reversible [2+2] Cycloaddition of Germaborenes. Angew Chem Int Ed Engl 2020; 59:3151-3155. [PMID: 31804742 PMCID: PMC7028040 DOI: 10.1002/anie.201914608] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Indexed: 11/07/2022]
Abstract
Phosphine-stabilized germaborenes featuring an unprecedented Ge=B double bond with short B⋅⋅⋅Ge contacts of 1.886(2) (4) and 1.895(3) Å (5) were synthesized starting from an intramolecular germylene-phosphine Lewis pair (1). After oxidative addition of boron trihalides BX3 (X=Cl, Br), the addition products were reduced with magnesium and catalytic amounts of anthracene to give the borylene derivatives in yields of 78 % (4) and 57 % (5). These halide-substituted germaborenes were characterized by single-crystal structure analysis, and the electronic structures were studied by quantum-chemical calculations. According to an NBO NRT analysis, the dominating Lewis structure contains a Ge=B double bond. The germaborenes undergo a reversible, photochemically initiated [2+2] cycloaddition with the phenyl moiety of a terphenyl substituent at room temperature, forming a complex heterocyclic structure with GeIV in a strongly distorted coordination environment.
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Affiliation(s)
- Dominik Raiser
- Institut für Anorganische ChemieEberhard Karls Universität TübingenAuf der Morgenstelle 1872076TübingenGermany
| | - Christian P. Sindlinger
- Institut für Anorganische ChemieGeorg August Universität GöttingenTammannstr. 437077GöttingenGermany
| | - Hartmut Schubert
- Institut für Anorganische ChemieEberhard Karls Universität TübingenAuf der Morgenstelle 1872076TübingenGermany
| | - Lars Wesemann
- Institut für Anorganische ChemieEberhard Karls Universität TübingenAuf der Morgenstelle 1872076TübingenGermany
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14
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Raiser D, Sindlinger CP, Schubert H, Wesemann L. Ge=B‐π‐Bindung: Synthese und reversible [2+2]‐Cycloaddition von Germaborenen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914608] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Dominik Raiser
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Deutschland
| | - Christian P. Sindlinger
- Institut für Anorganische Chemie Georg August Universität Göttingen Tammannstr. 4 37077 Göttingen Deutschland
| | - Hartmut Schubert
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Deutschland
| | - Lars Wesemann
- Institut für Anorganische Chemie Eberhard Karls Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Deutschland
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15
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Levason W, Monzittu FM, Reid G. Coordination chemistry and applications of medium/high oxidation state metal and non-metal fluoride and oxide-fluoride complexes with neutral donor ligands. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.04.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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16
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Hegen O, Virovets AV, Timoshkin AY, Scheer M. The Lewis-Base-Stabilized Diphenyl-Substituted Arsanylborane: A Versatile Building Block for Arsanylborane Oligomers. Chemistry 2018; 24:16521-16525. [DOI: 10.1002/chem.201804341] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Indexed: 11/07/2022]
Affiliation(s)
- Oliver Hegen
- Institut für Anorganische Chemie; Universität Regensburg; 93040 Regensburg Germany
| | - Alexander V. Virovets
- Institut für Anorganische Chemie; Universität Regensburg; 93040 Regensburg Germany
- Nikolaev Institute of Inorganic Chemistry; Siberian Division of Russian Academy of Sciences, Acad. Lavrentyev Prosp, 3; 630090 Novosibirsk Russia
- Novosibirsk State University; ul. Pirogova, 3 630090 Novosibirsk Russia
| | - Alexey Y. Timoshkin
- Institute of Chemistry; St. Petersburg State University; 199034 Universitetskaya emb. 7/9 St. Petersburg Russia
| | - Manfred Scheer
- Institut für Anorganische Chemie; Universität Regensburg; 93040 Regensburg Germany
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17
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Greenacre VK, Levason W, Reid G. Trialkylstibine Complexes of Boron, Aluminum, Gallium, and Indium Trihalides: Synthesis, Properties, and Bonding. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00265] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - William Levason
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - Gillian Reid
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
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18
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Cowie BE, Emslie DJH. Reactivity of a Borane-Appended 1,1′-Bisphosphinoferrocene Ligand: Transition Metal and Lewis Acid Coordination, Cyclopentadienyl Ring Borylation, and Boronium Cation Generation. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bradley E. Cowie
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
| | - David J. H. Emslie
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4M1, Canada
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19
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Systematics of boron halide complexes with dichalcogenoether ligands – Synthesis, structures and reaction chemistry. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2017.11.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Gün H, Mettlach née Casel C, Frank W. PCl bond length depression upon coordination of a diazaphosphasiletidine to a group 13 element Lewis acid or a transition metal carbonyl fragment – Synthesis and structural characterization of diazaphosphasiletidine adducts with P-coordination. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2017. [DOI: 10.1515/znb-2017-0126] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Three P-chloro-substituted diazaphosphasiletidines, Me2Si(NtBu)2PCl (1) and Me2Si(NtBu)2P(E)Cl (E=BCl3 (2); W(CO)5 (3)), are presented for comparison. 1 was first prepared more than 30 years ago and studied by means of spectroscopic methods, however, no crystal structure has been reported until now. In the presence of the comparatively weak Lewis acid BCl3 and the labile metal carbonyl complex [W(CO)5(THF)], 1 can be easily converted into its corresponding adducts 2 and 3. All products were characterized by single-crystal X-ray diffraction studies. The structures of the new compounds 2 and 3 reveal a remarkable P–Cl bond contraction caused by the coordination of 1 to the Lewis acid or the Lewis acidic W(CO)5 fragment. Although the coordination number of the P atom is increased in 2 and 3, the P–Cl bond length is reduced dramatically, some kind of bond length paradoxon. A computational study suggests that these P–Cl bond shortenings result from a less effective donation of electron density from the lone pairs at the nitrogen atoms to the antibonding σ
*(P–Cl) orbital in 2 and 3 as compared to 1.
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Affiliation(s)
- Hülya Gün
- Institut für Anorganische Chemie und Strukturchemie, Lehrstuhl II: Material-und Strukturforschung , Heinrich-Heine-Universität Düsseldorf , Universitätsstrasse 1 , D-40225 Düsseldorf , Germany
| | - Claudia Mettlach née Casel
- Institut für Anorganische Chemie und Strukturchemie, Lehrstuhl II: Material-und Strukturforschung , Heinrich-Heine-Universität Düsseldorf , Universitätsstrasse 1 , D-40225 Düsseldorf , Germany
| | - Walter Frank
- Institut für Anorganische Chemie und Strukturchemie, Lehrstuhl II: Material-und Strukturforschung , Heinrich-Heine-Universität Düsseldorf , Universitätsstrasse 1 , D-40225 Düsseldorf , Germany
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21
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Okio CK, Levason W, Monzittu FM, Reid G. Complexes of BX3 with EMe2 (X = F, Cl, Br, I; E = Se or Te): Synthesis, multinuclear NMR spectroscopic and structural studies. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.08.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Hill AF, Ward JS. Synthetic and structural studies of phosphine coordinated boronium salts. Dalton Trans 2017; 46:7291-7308. [PMID: 28540968 DOI: 10.1039/c7dt01023k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of BrH2B·SMe2 with primary and secondary phosphines affords a range of boronium salts of the form [H2B(PR3)2]Br (PR3 = PHCy21; PHPh2, 2; PH2Cy, 3), which have been fully characterised including solid-state determinations. Reactions of bulky tertiary phosphines, e.g., PCy3 and PPh3, with BrH2B·SMe2 do not proceed beyond the phosphine-stabilised bromoborane adducts, however, the smaller tertiary phosphine PMe2Ph readily proceeds to form [H2B(PMe2Ph)2]Br (4). The formation of the unsymmetrical boronium salts [H2B(PH2Cy)(PHCy2)]Br (5) and [H2B(PHCy2)(PHPh2)]Br (6) was observed by in situ NMR spectroscopy, however, the compounds were found to spontaneously disproportionate to their respective homophosphine boronium cations, even on prolonged storage in solution at -78 °C. Di- and triphosphines were found to form ring-closed boronium salts to afford [H2B(κ2-P,P'-diphosphine)]Br (diphosphine = dppe, 7; dcpe, 8; dmpe, 9; dppf, 10; dppf with [AsF6]- counterion, 11; amphos, 12). The analogous methodology with Br2HB·SMe2 proved less generally applicable due to an accessible decomposition pathway being available to boronium salts bearing primary and secondary phosphines, leading to the formation of phosphonium salts, although [BrHB(dcpe)]Br (13), [BrHB(PMe2Ph)2]Br (14) and [BrHB(amphos)]Br (15) were synthesised with varying degrees of success. Reaction of BrH2B·SMe2 with diphars afforded the boronium salt [H2B(κ2-P,P'-diphars)]Br (16), which featured two pendant arsine arms. Similarly, triphos was found to react with BrH2B·SMe2 to give [H2B(κ2-P,P'-triphos)]Br (17), which featured a pendant phosphine arm. Substitution of the bromide counter anion with either hexafluoroarsenate or hexfluoroantimonate anions revealed weak hydrogen bonds between the P-H bonds of the boronium cations and the anions, that appeared through NMR studies to be retained in solution (where hydrogen bonding order was determined to be Br- > [SbF6]-/[AsF6]-). This was further demonstrated by comparison of solid-state structures and solution NMR data of 1 with [H2B(PHCy2)2][SbF6] (18), 4 with [H2B(PMe2Ph)2][AsF6] (19) and 17 with [H2B(triphos)][AsF6] (20).
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Affiliation(s)
- Anthony F Hill
- Research School of Chemistry, The Australian National University, Canberra, ACT 2601, Australia.
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