1
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Kundu G, Amrutha PR, Raj KV, Tothadi S, Vanka K, Sen SS. Taming the parent oxoborane. Chem Sci 2023; 14:5894-5898. [PMID: 37293651 PMCID: PMC10246693 DOI: 10.1039/d3sc01544k] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 04/25/2023] [Indexed: 06/10/2023] Open
Abstract
Despite recent advancements in the chemistry of multiply bound boron compounds, the laboratory isolation of the parent oxoborane moiety, HBO has long remained an unsolved and well-recognized challenge. The reaction of 6-SIDipp·BH3 [6-SIDipp = 1,3-di(2,6-diisopropylphenyl)tetrahydropyrimidine-2-ylidene] with GaCl3 afforded an unusual boron-gallium 3c-2e compound (1). The addition of water to 1 resulted in the release of H2 and the formation of a rare acid stabilized neutral parent oxoborane, LB(H)[double bond, length as m-dash]O (2). Crystallographic and density functional theory (DFT) analyses support the presence of a terminal B[double bond, length as m-dash]O double bond. Subsequent addition of another equivalent of water molecule led to hydrolysis of the B-H bond to the B-OH bond, but the 'B[double bond, length as m-dash]O' moiety remained intact, resulting in the formation of the hydroxy oxoborane compound (3), which can be classified as a monomeric form of metaboric acid.
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Affiliation(s)
- Gargi Kundu
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory Dr Homi Bhabha Road, Pashan Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - P R Amrutha
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory Dr Homi Bhabha Road, Pashan Pune 411008 India
| | - K Vipin Raj
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Physical and Material Chemistry Division, CSIR-National Chemical Laboratory Dr Homi Bhabha Road, Pashan Pune 411008 India
| | - Srinu Tothadi
- Analytical and Environmental Sciences Division and Centralized Instrumentation Facility, CSIR-Central Salt and Marine Chemicals Research Institute Gijubhai Badheka Marg Bhavnagar-364002 India
| | - Kumar Vanka
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Physical and Material Chemistry Division, CSIR-National Chemical Laboratory Dr Homi Bhabha Road, Pashan Pune 411008 India
| | - Sakya S Sen
- Inorganic Chemistry and Catalysis Division, CSIR-National Chemical Laboratory Dr Homi Bhabha Road, Pashan Pune 411008 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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2
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Bonath M, Schädle D, Maichle-Mössmer C, Anwander R. The Alkylaluminate/Gallate Trap: Metalation of Benzene by Heterobimetallic Yttrocene Complexes [Cp* 2Y(MMe 3R)] (M = Al, Ga). Inorg Chem 2021; 60:14952-14968. [PMID: 34514777 DOI: 10.1021/acs.inorgchem.1c02349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Yttrocene derivatives [Cp*2Y(MMe4)] (Cp* = C5Me5; M = Al, Ga) and Cp*2Y[Me3Al{B(NDippCH)2}] (Dipp = C6H3iPr2-2,6) deprotonate benzene at elevated temperatures via the release of methane. The formation of [Cp*2Y(Me2MPh2)] (M = Al, Ga), Cp*2Y(MPh4) (M = Al, Ga), Cp*2Y[Me2AlPh{B(NDippCH)2}], and Cp*2Y[AlPh3{B(NDippCH)2}] can be controlled via the temperature applied. The activation temperature and formation of the coordinatively unsaturated "reactive" [Cp*2YMe] strongly depend on the coordination strength of the displaceable Lewis acids [AlMe3]2, GaMe3, and [Me2Al{B(NDippCH)2}]2. Hence, [Cp*2Y(AlMe4)] requires temperatures above 100 °C to metalate benzene, while Cp*2Y[AlMe3{B(NDippCH)2}] undergoes C-H-bond activation even at ambient temperatures. A kinetic deuterium isotope effect was observed for the reactions in C6D6 solutions. Distinct differences in the stabilities of the bulky Group 13 anions ([Me2MPh2]-, [MPh4]-, [Me3Al{B(NDippCH)2}]-, [Me2AlPh{B(NDippCH)2}]-, and [AlPh3{B(NDippCH)2}]-) are assessed by detailed studies of the coordination chemistry with tetrahydrofuran (THF) and by variable-temperature 1H NMR spectroscopy. Thus, increased steric bulk or a reduced Lewis acidity of the Group 13 metal center promote temperature-sensitive dissociation of trivalent Group 13 alkyl entities. Consequently, compound Cp*2Y[AlPh3{B(NDippCH)2}] was found to engage in a dissociation equilibrium with [Cp*2YPh] and AlPh2{B(NDippCH)2} in a C6D6 solution at ambient temperature. The reaction of Cp*2Y[AlPh3{B(NDippCH)2}] with THF results in the concomitant formation of monometallic Cp*2YPh(THF) and the solvent-separated ion pair [Cp*2Y(THF)2][AlPh3{B(NDippCH)2}].
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Affiliation(s)
- Martin Bonath
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Tübingen 72076, Germany
| | - Dorothea Schädle
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Tübingen 72076, Germany
| | - Cäcilia Maichle-Mössmer
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Tübingen 72076, Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie, Eberhard Karls Universität Tübingen, Auf der Morgenstelle 18, Tübingen 72076, Germany
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3
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Arrowsmith M, Endres S, Heinz M, Nestler V, Holthausen MC, Braunschweig H. Probing the Boundaries between Lewis-Basic and Redox Behavior of a Parent Borylene. Chemistry 2021; 27:17660-17668. [PMID: 34596278 PMCID: PMC9299150 DOI: 10.1002/chem.202103256] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Indexed: 11/09/2022]
Abstract
The parent borylene (CAAC)(Me3P)BH, 1 (CAAC=cyclic alkyl(amino)carbene), acts both as a Lewis base and one‐electron reducing agent towards group 13 trichlorides (ECl3, E=B, Al, Ga, In), yielding the adducts 1‐ECl3 and increasing proportions of the radical cation [1]•+ for the heavier group 13 analogues. With boron trihalides (BX3, X=F, Cl, Br, I) 1 undergoes sequential adduct formation and halide abstraction reactions to yield borylboronium cations and shows an increasing tendency towards redox processes for the heavier halides. Calculations confirm that 1 acts as a strong Lewis base towards EX3 and show a marked increase in the B−E bond dissociation energies down both group 13 and the halide group.
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Affiliation(s)
- Merle Arrowsmith
- 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
| | - Sara Endres
- 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
| | - Myron Heinz
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Str. 7, 60438, Frankfurt am Main, Germany
| | - Vincent Nestler
- 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
| | - Max C Holthausen
- Institut für Anorganische und Analytische Chemie, Goethe-Universität Frankfurt am Main, Max-von-Laue-Str. 7, 60438, Frankfurt am Main, 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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4
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Bonding in M(NHBMe)2 and M[Mn(CO)5]2 complexes (M=Zn, Cd, Hg; NHBMe=(HCNMe)2B): divalent group 12 metals with zero oxidation state. Theor Chem Acc 2021. [DOI: 10.1007/s00214-021-02751-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AbstractQuantum chemical studies using density functional theory were carried out on M(NHBMe)2 and M[Mn(CO)5]2 (M=Zn, Cd, Hg) complexes. The calculations suggest that M(NHBMe)2 and M[Mn(CO)5]2 have D2d and D4d symmetry, respectively, with a 1A1 electronic ground state. The bond dissociation energies of the ligands have the order of Zn > Cd > Hg. A thorough bonding analysis using charge and energy decomposition methods suggests that the title complexes are best represented as NHBMe⇆M0⇄NHBMe and Mn(CO)5⇆M0⇄Mn(CO)5 where the metal atom M in the electronic ground state with an ns2 electron configuration is bonded to the (NHBMe)2 and [Mn(CO)5]2 ligands through donor–acceptor interaction. These experimentally known complexes are the first examples of mononuclear complexes with divalent group 12 metals with zero oxidation state that are stable at ambient condition. These complexes represent the rare situation where the ligands act as a strong acceptor and the metal center acts as strong donor. The relativistic effect of Hg leads to a weaker electron donating strength of the 6s orbital, which explains the trend of the bond dissociation energy.
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5
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Saha R, Pan S, Chattaraj PK, Merino G. Filling the void: controlled donor-acceptor interaction facilitates the formation of an M-M single bond in the zero oxidation state of M (M = Zn, Cd, Hg). Dalton Trans 2020; 49:1056-1064. [PMID: 31848549 DOI: 10.1039/c9dt04213j] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The intriguing question of whether it is possible to form a genuine M0-M0 single bond for the M2 species (M = Zn, Cd, Hg) is addressed here. So far, all the bonds reported in the literature are exclusively MI-MI. Herein, we present viable M2(NHBMe)2 (M = Zn, Cd, Hg; NHBMe = (HCNMe)2B) complexes in which the controlled donor-acceptor interaction leads to an M0-M0 single bond. In these complexes, M2 in the 1∑g ground state with the (nσg+)2(nσu+)2 (n = 7, 10 and 14 for M = Zn, Cd and Hg, respectively) valence electron configuration forms donor-acceptor bonding with singlet 2NHBMe ligands where a combined effect of dominant (+,-) σ-backdonation from the antibonding (nσu+)2 orbital of M2 to the 2NHBMe ligands and a somewhat weaker (+,+) σ-donation from the 2NHBMe ligands to the bonding (n + 1)σg+ orbital leads to the unorthodox bonding situation of forming an M-M single bond in the zero oxidation state by eventually nullifying one effect by another. This is an unprecedented situation in the sense that the NHBMe ligand acts as a strong σ-acceptor and a weaker σ-donor. A comparison with the experimentally reported M2(PhDipp)2 complexes reveals the uniqueness of the NHBMe ligand in exhibiting such a bonding scenario. The M2(NHBMe)2 complex is thermochemically viable with respect to possible dissociation channels at room temperature, except for metal extrusion processes, M2(NHBMe)2 → M + M(NHBMe)2 and M2(NHBMe)2 → M2 + (NHBMe)2. Although the latter two processes are exergonic, they are kinetically protected by a high free energy barrier of 26.5-39.5 kcal mol-1. The experimental characterization of M2(PhDipp)2 despite similar exergonic channels reveals such kinetic stability to be enough for the viability of the M2(NHBMe)2 complexes. Furthermore, the ligand exchange reaction considering M2(PhMe)2 as the starting material also turned out to be feasible. Therefore, the M2(NHBMe)2 complexes are the first cases that feature a neutral M2 moiety with a single M0-M0 covalent bond, where M is a Group 12 metal.
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Affiliation(s)
- Ranajit Saha
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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6
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Saha R, Pan S, Merino G, Chattaraj PK. Unprecedented Bonding Situation in Viable E
2
(NHB
Me
)
2
(E=Be, Mg; NHB
Me
=(HCN
Me
)
2
B) Complexes: Neutral E
2
Forms a Single E−E Covalent Bond. Angew Chem Int Ed Engl 2019; 58:8372-8377. [DOI: 10.1002/anie.201900992] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Ranajit Saha
- Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur 721302 India
| | - Sudip Pan
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Gabriel Merino
- Departamento de Física AplicadaCentro de Investigación y de Estudios Avanzados Unidad Mérida. Km 6 Antigua Carretera a Progreso.Apdo. Postal 73, Cordemex 97310 Mérida Yuc. México
| | - Pratim K. Chattaraj
- Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur 721302 India
- Department of Chemistry and Center for Theoretical StudiesIndian Institute of Technology Bombay Mumbai 400076 India
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7
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Hofmann A, Légaré MA, Wüst L, Braunschweig H. Heterodiatomic Multiple Bonding in Group 13: A Complex with a Boron-Aluminum π Bond Reduces CO 2. Angew Chem Int Ed Engl 2019; 58:9776-9781. [PMID: 30985966 DOI: 10.1002/anie.201902655] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Indexed: 11/08/2022]
Abstract
Heterodiatomic multiple bonds have never been observed within Group 13. Herein, we disclose a method that generates [(CAAC)PhB=AlCp3t ] (1), a complex featuring π bonding between boron and aluminum through the association of singlet fragments. We present the properties of this multiple bond as well as the reactivity of the complex with carbon dioxide, which yields a boron CO complex via an unusual metathesis reaction.
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Affiliation(s)
- Alexander Hofmann
- 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
| | - Marc-André Légaré
- 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
| | - Leonie Wüst
- 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
| | - 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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8
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Hofmann A, Légaré M, Wüst L, Braunschweig H. Heterodiatomare Mehrfachbindung zwischen Elementen der Gruppe 13: Ein Komplex mit B‐Al‐π‐Bindung reduziert CO
2. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902655] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Alexander Hofmann
- Institut für Anorganische ChemieJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Marc‐André Légaré
- Institut für Anorganische ChemieJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Leonie Wüst
- Institut für Anorganische ChemieJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
| | - Holger Braunschweig
- Institut für Anorganische ChemieJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
- Institute for Sustainable Chemistry & Catalysis with BoronJulius-Maximilians-Universität Würzburg Am Hubland 97074 Würzburg Deutschland
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9
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Saha R, Pan S, Merino G, Chattaraj PK. Unprecedented Bonding Situation in Viable E 2(NHB Me) 2(E=Be, Mg; NHB Me=(HCN Me) 2B) Complexes: Neutral E 2Forms a Single E−E Covalent Bond. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ranajit Saha
- Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur 721302 India
| | - Sudip Pan
- Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 China
| | - Gabriel Merino
- Departamento de Física AplicadaCentro de Investigación y de Estudios Avanzados Unidad Mérida. Km 6 Antigua Carretera a Progreso.Apdo. Postal 73, Cordemex 97310 Mérida Yuc. México
| | - Pratim K. Chattaraj
- Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur 721302 India
- Department of Chemistry and Center for Theoretical StudiesIndian Institute of Technology Bombay Mumbai 400076 India
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10
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Roy DK, Krummenacher I, Stennett TE, Lenczyk C, Thiess T, Welz E, Engels B, Braunschweig H. Selective one- and two-electron reductions of a haloborane enabled by a π-withdrawing carbene ligand. Chem Commun (Camb) 2018; 54:9015-9018. [PMID: 30046799 DOI: 10.1039/c8cc03433h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A carbene-stabilised neutral boryl radical and a boryl anion are isolated via selective one- and two-electron reduction of a diamidocarbene (DAC) adduct of dibromo(pentafluorophenyl)borane. Both the radical and the anion have been characterised by various spectroscopic techniques in solution, while the structures have been ascertained by single-crystal X-ray diffraction. In contrast, the reduction of the analogous cyclic (alkyl)(amino) carbene (CAAC) adduct yields a C-H activation product.
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Affiliation(s)
- Dipak Kumar Roy
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Ivo Krummenacher
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Tom E Stennett
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Carsten Lenczyk
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Torsten Thiess
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Eileen Welz
- Institute for Physical and Theoretical Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Bernd Engels
- Institute for Physical and Theoretical Chemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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11
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Protchenko AV, Urbano J, Abdalla JAB, Campos J, Vidovic D, Schwarz AD, Blake MP, Mountford P, Jones C, Aldridge S. Electronic Delocalization in Two and Three Dimensions: Differential Aggregation in Indium “Metalloid” Clusters. Angew Chem Int Ed Engl 2017; 56:15098-15102. [DOI: 10.1002/anie.201708496] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 09/21/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Andrey V. Protchenko
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
| | - Juan Urbano
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
- Departamento de Química; Universidad de Huelva; Campus de El Carmen 21007 Huelva Spain
| | - Joseph A. B. Abdalla
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
| | - Jesús Campos
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
- Instituto de Investigaciones Químicas (IIQ); Consejo Superior de Investigaciones Científicas (CSIC); Universidad de Sevilla; Avda. Américo Vespucio, 49 41092 Sevilla Spain
| | - Dragoslav Vidovic
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
- SPMS-CBC; Nanyang Technological University; 21 Nanyang Link Singapore 637371 Singapore
| | - Andrew D. Schwarz
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
| | - Matthew P. Blake
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
| | - Philip Mountford
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
| | - Cameron Jones
- School of Chemistry; Monash University; PO Box 23 Melbourne VIC 3800 Australia
| | - Simon Aldridge
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
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12
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Protchenko AV, Urbano J, Abdalla JAB, Campos J, Vidovic D, Schwarz AD, Blake MP, Mountford P, Jones C, Aldridge S. Electronic Delocalization in Two and Three Dimensions: Differential Aggregation in Indium “Metalloid” Clusters. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708496] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Andrey V. Protchenko
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
| | - Juan Urbano
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
- Departamento de Química; Universidad de Huelva; Campus de El Carmen 21007 Huelva Spain
| | - Joseph A. B. Abdalla
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
| | - Jesús Campos
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
- Instituto de Investigaciones Químicas (IIQ); Consejo Superior de Investigaciones Científicas (CSIC); Universidad de Sevilla; Avda. Américo Vespucio, 49 41092 Sevilla Spain
| | - Dragoslav Vidovic
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
- SPMS-CBC; Nanyang Technological University; 21 Nanyang Link Singapore 637371 Singapore
| | - Andrew D. Schwarz
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
| | - Matthew P. Blake
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
| | - Philip Mountford
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
| | - Cameron Jones
- School of Chemistry; Monash University; PO Box 23 Melbourne VIC 3800 Australia
| | - Simon Aldridge
- Inorganic Chemistry Laboratory; Department of Chemistry; University of Oxford; South Parks Road Oxford OX1 3QR UK
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13
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Bonath M, Hollfelder CO, Schädle D, Maichle‐Mössmer C, Sirsch P, Anwander R. C–H Bond Activation and Isoprene Polymerization by Lutetium Alkylaluminate/gallate Complexes Bearing a Peripheral Boryl and a Bulky Hydrotris(pyrazolyl)borate Ligand. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700730] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Martin Bonath
- Institut für Anorganische Chemie Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Christoph O. Hollfelder
- Institut für Anorganische Chemie Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Dorothea Schädle
- Institut für Anorganische Chemie Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Cäcilia Maichle‐Mössmer
- Institut für Anorganische Chemie Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Peter Sirsch
- Institut für Anorganische Chemie Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
| | - Reiner Anwander
- Institut für Anorganische Chemie Universität Tübingen Auf der Morgenstelle 18 72076 Tübingen Germany
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14
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Ghorai S, Jemmis ED. A DFT Study on the Stabilization of the B≡B Triple Bond in a Metallaborocycle: Contrasting Electronic Structures of Boron and Carbon Analogues. Chemistry 2017; 23:9746-9751. [DOI: 10.1002/chem.201702422] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Sagar Ghorai
- Inorganic and Physical Chemistry Department; Indian Institute of Science; Bangalore 560012 Karnataka India
| | - Eluvathingal D. Jemmis
- Inorganic and Physical Chemistry Department; Indian Institute of Science; Bangalore 560012 Karnataka India
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15
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Bernhardt E, Bernhardt-Pitchougina V, Jenne C. Reaction of the Tricyanoborate Dianion [B(CN)3]2–with HgCl2. Inorg Chem 2017; 56:5465-5470. [DOI: 10.1021/acs.inorgchem.7b00541] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eduard Bernhardt
- Fakultät für Mathematik und Naturwissenschaften, Anorganische Chemie, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Vera Bernhardt-Pitchougina
- Fakultät für Mathematik und Naturwissenschaften, Anorganische Chemie, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Carsten Jenne
- Fakultät für Mathematik und Naturwissenschaften, Anorganische Chemie, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
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16
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Stephan DW. Eine Geschichte über zwei Elemente: die Umpolung der Lewis-Acidität/Basizität von Bor und Phosphor. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700721] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Douglas W. Stephan
- Department of Chemistry; University of Toronto; 80 St. George St Toronto Ontario M5S3H6 Kanada
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17
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Stephan DW. A Tale of Two Elements: The Lewis Acidity/Basicity Umpolung of Boron and Phosphorus. Angew Chem Int Ed Engl 2017; 56:5984-5992. [DOI: 10.1002/anie.201700721] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Douglas W. Stephan
- Department of Chemistry; University of Toronto; 80 St. George St Toronto Ontario M5S3H6 Canada
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18
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Kong L, Lu W, Yongxin L, Ganguly R, Kinjo R. Formation of Boron–Main-Group Element Bonds by Reactions with a Tricoordinate Organoboron L2PhB: (L = Oxazol-2-ylidene). Inorg Chem 2017; 56:5586-5593. [DOI: 10.1021/acs.inorgchem.6b02993] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lingbing Kong
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, Singapore 637371, Singapore
| | - Wei Lu
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, Singapore 637371, Singapore
| | - Li Yongxin
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, Singapore 637371, Singapore
| | - Rakesh Ganguly
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, Singapore 637371, Singapore
| | - Rei Kinjo
- Division
of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, Singapore 637371, Singapore
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19
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Dange D, Sindlinger CP, Aldridge S, Jones C. Boryl substituted group 13 metallylenes: complexes with an iron carbonyl fragment. Chem Commun (Camb) 2016; 53:149-152. [PMID: 27824166 DOI: 10.1039/c6cc08449d] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first examples of boryl substituted aluminylene and gallylene complexes, [(DAB)B(THF)Al{Fe(CO)3(μ-CO)}]2 and [(DAB)BGa{μ-Fe(CO)4}]2 (DAB = {(C6H3Pri2-2,6)NCH}2) have been prepared by reduction of MX2(THF){B(DAB)} (M = Al or Ga, X = Cl or Br) with K2[Fe(CO)4]. Spectroscopic and crystallographic analyses of the compounds show them to be structurally distinct dimers, the latter of which possesses a close GaGa separation that computational analyses reveal has negligible bonding character.
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Affiliation(s)
- Deepak Dange
- Monash Centre for Catalysis, School of Chemistry, PO Box 23, Monash University, VIC 3800, Australia.
| | - Christian P Sindlinger
- Department of Chemistry, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK
| | - Simon Aldridge
- Department of Chemistry, Inorganic Chemistry Laboratory, South Parks Road, Oxford, OX1 3QR, UK
| | - Cameron Jones
- Monash Centre for Catalysis, School of Chemistry, PO Box 23, Monash University, VIC 3800, Australia.
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20
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Vondung L, Frank N, Fritz M, Alig L, Langer R. Phosphine-Stabilized Borylenes and Boryl Anions as Ligands? Redox Reactivity in Boron-Based Pincer Complexes. Angew Chem Int Ed Engl 2016; 55:14450-14454. [DOI: 10.1002/anie.201605838] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 08/12/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Lisa Vondung
- Department of Chemistry; Philipps-Universität Marburg; Hans-Meerwein-Strasse 35032 Marburg Germany
| | - Nicolas Frank
- Department of Chemistry; Philipps-Universität Marburg; Hans-Meerwein-Strasse 35032 Marburg Germany
| | - Maximilian Fritz
- Department of Chemistry; Philipps-Universität Marburg; Hans-Meerwein-Strasse 35032 Marburg Germany
| | - Lukas Alig
- Department of Chemistry; Philipps-Universität Marburg; Hans-Meerwein-Strasse 35032 Marburg Germany
| | - Robert Langer
- Department of Chemistry; Philipps-Universität Marburg; Hans-Meerwein-Strasse 35032 Marburg Germany
- Lehn Institute of Functional Material (LIFM); Sun Yat-Sen University Guangzhou (SYSU); Xingang Road West Guangzhou 510275 PR China
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21
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Vondung L, Frank N, Fritz M, Alig L, Langer R. Phosphan-stabilisierte Borylene und Boryl-Anionen als Liganden? Redoxaktivität in Bor-basierten Pinzetten-Komplexen. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605838] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lisa Vondung
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 35032 Marburg Deutschland
| | - Nicolas Frank
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 35032 Marburg Deutschland
| | - Maximilian Fritz
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 35032 Marburg Deutschland
| | - Lukas Alig
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 35032 Marburg Deutschland
| | - Robert Langer
- Fachbereich Chemie; Philipps-Universität Marburg; Hans-Meerwein-Straße 35032 Marburg Deutschland
- Lehn Institute of Functional Material (LIFM); Sun Yat-Sen University Guangzhou (SYSU); Xingang Road West Guangzhou 510275 PR China
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22
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Asami SS, Okamoto M, Suzuki K, Yamashita M. A Boryl-Substituted Diphosphene: Synthesis, Structure, and Reaction with n-Butyllithium To Form a Stabilized Adduct by pπ-pπ Interaction. Angew Chem Int Ed Engl 2016; 55:12827-31. [PMID: 27629120 DOI: 10.1002/anie.201607995] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Indexed: 11/12/2022]
Abstract
A boryl-substituted diphosphene was synthesized through the nucleophilic borylation of PCl3 with a borylzinc reagent, followed by a reduction with Mg. A combined analysis of the resulting diboryldiphosphene by single-crystal X-ray diffraction, DFT calculations, and UV/Vis spectroscopy revealed a σ-electron-donating effect for the boryl substituent that was slightly weaker than that of the 2,4,6-tri-tert-butylphenyl (Mes*) ligand. The reaction of this diboryldiphosphene with (n) BuLi afforded a boryl-substituted phosphinophosphide that was, in comparison with the thermally unstable Mes*-substituted diaryldiphosphene, stabilized by a π-electron-accepting effect of the boryl substituent.
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Affiliation(s)
- Shun-Suke Asami
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Masafumi Okamoto
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Katsunori Suzuki
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan
| | - Makoto Yamashita
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan.
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23
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Asami SS, Okamoto M, Suzuki K, Yamashita M. A Boryl-Substituted Diphosphene: Synthesis, Structure, and Reaction withn-Butyllithium To Form a Stabilized Adduct by pπ-pπ Interaction. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607995] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shun-suke Asami
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Masafumi Okamoto
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Katsunori Suzuki
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
| | - Makoto Yamashita
- Department of Applied Chemistry; Faculty of Science and Engineering; Chuo University; 1-13-27 Kasuga, Bunkyo-ku Tokyo 112-8551 Japan
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24
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Lu W, Hu H, Li Y, Ganguly R, Kinjo R. Isolation of 1,2,4,3-Triazaborol-3-yl-metal (Li, Mg, Al, Au, Zn, Sb, Bi) Derivatives and Reactivity toward CO and Isonitriles. J Am Chem Soc 2016; 138:6650-61. [DOI: 10.1021/jacs.6b03432] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Wei Lu
- Division of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, 637371, Singapore
| | - Haitao Hu
- Division of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, 637371, Singapore
| | - Yongxin Li
- Division of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, 637371, Singapore
| | - Rakesh Ganguly
- Division of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, 637371, Singapore
| | - Rei Kinjo
- Division of Chemistry and Biological Chemistry, School of Physical
and Mathematical Sciences and ‡NTU-CBC Crystallography Facility, Nanyang Technological University, 637371, Singapore
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25
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Braunschweig H, Dewhurst RD, Pentecost L, Radacki K, Vargas A, Ye Q. Dative Bonding between Group 13 Elements Using a Boron-Centered Lewis Base. Angew Chem Int Ed Engl 2015; 55:436-40. [PMID: 26768824 DOI: 10.1002/anie.201509289] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Indexed: 11/09/2022]
Abstract
An electron-rich monovalent boron compound is used as a Lewis base to prepare adducts with Group 13 Lewis acids using both its boron and nitrogen sites. The hard Lewis acid AlCl3 binds through a nitrogen atom of the Lewis base, while softer Lewis acids GaX3 (Cl, Br, I) bind at the boron atom. The latter are the first noncluster Lewis adducts between a boron-centered Lewis base and a main-group Lewis acid.
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Affiliation(s)
- Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www-anorganik.chemie.uni-wuerzburg.de/Braunschweig/.
| | - Rian D Dewhurst
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www-anorganik.chemie.uni-wuerzburg.de/Braunschweig/
| | - Leanne Pentecost
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, Sussex (UK)
| | - Krzysztof Radacki
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www-anorganik.chemie.uni-wuerzburg.de/Braunschweig/
| | - Alfredo Vargas
- Department of Chemistry, School of Life Sciences, University of Sussex, Brighton BN1 9QJ, Sussex (UK)
| | - Qing Ye
- Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074 Würzburg (Germany) http://www-anorganik.chemie.uni-wuerzburg.de/Braunschweig/
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26
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Braunschweig H, Dewhurst RD, Pentecost L, Radacki K, Vargas A, Ye Q. Dative Wechselwirkungen einer Bor-zentrierten Lewis-Base mit Gruppe-13-Elementen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201509289] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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27
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Wang B, Kang X, Nishiura M, Luo Y, Hou Z. Isolation, structure and reactivity of a scandium boryl oxycarbene complex. Chem Sci 2015; 7:803-809. [PMID: 28966773 PMCID: PMC5580044 DOI: 10.1039/c5sc03138a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 09/16/2015] [Indexed: 11/21/2022] Open
Abstract
A well-defined scandium boryl oxycarbene complex undergoes coupling with CO, C–H activation of lutidine, and cyclopropanation with ethylene.
The reaction of a half-sandwich scandium boryl complex 1 with CO (1 atm) afforded a novel boryl oxycarbene complex 2. The structure of 2 was characterized by 1H, 13C and 11B NMR, X-ray diffraction, and DFT analysis. Further reaction of 2 with CO (1 atm) yielded a phenylamido- and boryl-substituted enediolate complex 3 through C–C bond formation between CO and the carbene unit in 2 and cleavage and rearrangement of the Si–N bond in the silylene-linked Cp–amido ligand. Upon heating, insertion of the carbene atom into a methine C–H bond in the boryl ligand of 2 took place to give an alkoxide complex 4. The reactions of 2 with pyridine and 2-methylpyridine led to insertion of the carbene atom into an ortho-C–H bond of pyridine and into a methyl C–H bond of 2-methylpyridine, respectively. The reaction of 2 with ethylene yielded a borylcyclopropyloxy complex 7 through cycloaddition of the carbene atom to ethylene.
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Affiliation(s)
- Baoli Wang
- Organometallic Chemistry Laboratory and RIKEN Center for Sustainable Resource Science , RIKEN , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan .
| | - Xiaohui Kang
- Organometallic Chemistry Laboratory and RIKEN Center for Sustainable Resource Science , RIKEN , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan . .,State Key Laboratory of Fine Chemicals , School of Pharmaceutical Science and Technology , Dalian University of Technology , Dalian 116024 , China .
| | - Masayoshi Nishiura
- Organometallic Chemistry Laboratory and RIKEN Center for Sustainable Resource Science , RIKEN , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan .
| | - Yi Luo
- State Key Laboratory of Fine Chemicals , School of Pharmaceutical Science and Technology , Dalian University of Technology , Dalian 116024 , China .
| | - Zhaomin Hou
- Organometallic Chemistry Laboratory and RIKEN Center for Sustainable Resource Science , RIKEN , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan . .,State Key Laboratory of Fine Chemicals , School of Pharmaceutical Science and Technology , Dalian University of Technology , Dalian 116024 , China .
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28
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Frank R, Howell J, Campos J, Tirfoin R, Phillips N, Zahn S, Mingos DMP, Aldridge S. Cobalt Boryl Complexes: Enabling and Exploiting Migratory Insertion in Base-Metal-Mediated Borylation. Angew Chem Int Ed Engl 2015; 54:9586-90. [DOI: 10.1002/anie.201504929] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Indexed: 11/10/2022]
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29
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Cobalt Boryl Complexes: Enabling and Exploiting Migratory Insertion in Base-Metal-Mediated Borylation. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504929] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Arnold T, Braunschweig H, Ewing WC, Kramer T, Mies J, Schuster JK. Beryllium bis(diazaborolyl): old neighbors finally shake hands. Chem Commun (Camb) 2015; 51:737-40. [PMID: 25417558 DOI: 10.1039/c4cc08519a] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a linear beryllium bis(diazaborolyl) compound featuring the first non-cluster bond between boron and beryllium has been achieved through the reaction of Yamashita's lithium diazaborolide and BeCl2. In accord with the established chemistry of beryllium, the bonding is polar covalent in character, as determined by structural and spectroscopic analysis, as well as reactivity studies.
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Affiliation(s)
- T Arnold
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
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31
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Kong L, Ganguly R, Li Y, Kinjo R. Diverse reactivity of a tricoordinate organoboron L 2PhB: (L = oxazol-2-ylidene) towards alkali metal, group 9 metal, and coinage metal precursors. Chem Sci 2015; 6:2893-2902. [PMID: 29308167 PMCID: PMC5655907 DOI: 10.1039/c5sc00404g] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Accepted: 02/22/2015] [Indexed: 12/31/2022] Open
Abstract
The reactivity of a tricoordinate organoboron L2PhB: (L = oxazol-2-ylidene) 1 towards metal precursors and its coordination chemistry were comprehensively studied.
The reactivity of a tricoordinate organoboron L2PhB: (L = oxazol-2-ylidene) 1 towards metal precursors and its coordination chemistry were comprehensively studied. While the boron center in 1 is reluctant to coordinate to the alkali metals in their trifluoromethanesulfonate salts (MOTf) (M = Li, Na, K), the unprecedented compound 2 containing two L2PhB: units linked by a cyclic Li(OTf)2Li spacer was obtained from the reaction of 1 with LiOTf. Treatment of 1 with group 9 metal complexes [MCl(COD)]2 (M = Rh, Ir) afforded the first zwitterionic rhodium(i)–boronium complex 3 and the iridium(iii)–borane complex 4, respectively. The reaction pathway may involve C–H activation followed by proton migration from the metals to the boron center, demonstrating the first example of the deprotonation of metal hydrides by a basic boron. In the reactions with coinage metals, 1 could act as a two-electron reducing agent towards the metal chlorides MCl (M = Cu, Ag, Au). Meanwhile, the reaction of 1 with gold chloride supported by a N-heterocyclic carbene (NHC) produced a heteroleptic cationic gold complex [(L2PhB)Au(NHC)]Cl (6) featuring both carbene and L2PhB: ligands on the gold atom. In contrast, an isolable gold chloride complex (L2PhB)AuCl (8) was obtained by direct complexation between 1 and triphenylphosphine-gold chloride via ligand exchange. X-ray diffraction analysis and computational studies revealed the nature of the B:→Au bonding interaction in complexes 6 and 8. Natural Population Analysis (NPA) and Natural Bond Orbital (NBO) analysis support the strong σ-donating property of the L2PhB: ligand. Moreover, preliminary studies showed that complex 8 can serve as an efficient precatalyst for the addition of X–H (X = N, O, C) to alkynes under ambient conditions, demonstrating the first application of a metal complex featuring a neutral boron-based ligand in catalysis.
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Affiliation(s)
- Lingbing Kong
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore .
| | - Rakesh Ganguly
- NTU-CBC Crystallography Facility , Nanyang Technological University , Singapore 637371 , Singapore
| | - Yongxin Li
- NTU-CBC Crystallography Facility , Nanyang Technological University , Singapore 637371 , Singapore
| | - Rei Kinjo
- Division of Chemistry and Biological Chemistry , School of Physical and Mathematical Sciences , Nanyang Technological University , Singapore 637371 , Singapore .
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32
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Asakawa H, Lee KH, Furukawa K, Lin Z, Yamashita M. Lowering the reduction potential of a boron compound by means of the substituent effect of the boryl group: one-electron reduction of an unsymmetrical diborane(4). Chemistry 2015; 21:4267-71. [PMID: 25639658 DOI: 10.1002/chem.201406609] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Indexed: 11/11/2022]
Abstract
We have clarified and observed the high electron affinity of pinB-BMes2 (1; Mes = mesityl, pin = pinacolato). By using electrochemistry, it was shown that 1 has a higher electron affinity than those of B2pin2 and Mes3B. One-electron reduction of 1 gave the corresponding radical anion. The ESR spectroscopy and DFT calculation revealed the unsymmetrical distribution of electron density over the B-B bond. UV/Vis spectroscopy showed that the SOMO-related absorption supports the deep purple color of the radical anion. DFT studies on the torsion angle dependency of the LUMO levels and relative energies revealed the reason why 1 has high electron affinity as a result of the substituent effect of the Bpin group.
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Affiliation(s)
- Hiroki Asakawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27, Kasuga, Bunkyo-ku, 112-8551 Tokyo (Japan) http://www.chem.chuo-u.ac.jp/∼element/index-e.html
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33
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34
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Frank R, Howell J, Tirfoin R, Dange D, Jones C, Mingos DMP, Aldridge S. Circumventing Redox Chemistry: Synthesis of Transition Metal Boryl Complexes from a Boryl Nucleophile by Decarbonylation. J Am Chem Soc 2014; 136:15730-41. [DOI: 10.1021/ja508979x] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- René Frank
- Inorganic
Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - James Howell
- Inorganic
Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Rémi Tirfoin
- Inorganic
Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Deepak Dange
- School
of Chemistry, Monash University, PO Box 23, Melbourne, Victoria 3800, Australia
| | - Cameron Jones
- School
of Chemistry, Monash University, PO Box 23, Melbourne, Victoria 3800, Australia
| | - D. Michael P. Mingos
- Inorganic
Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Simon Aldridge
- Inorganic
Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
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35
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Dettenrieder N, Schädle C, Maichle-Mössmer C, Anwander R. Reactivity of boryllithium with AlMe3, AlEt3, and GaMe3, including the synthesis of a lanthanum heterogallate complex. Dalton Trans 2014; 43:15760-70. [DOI: 10.1039/c4dt02155j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Braunschweig H, Ye Q, Vargas A, Dewhurst RD, Hupp F. Complete and partial 1,2-additions across transition metal-boron double bonds. J Am Chem Soc 2014; 136:9560-3. [PMID: 24959972 DOI: 10.1021/ja504761f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The first 1,2-additions across a metal-boron double bond are reported, one a definitive chlorogallation of a Fe═B bond, the other a partial chlorogallation of a Mo═B bond that leads to a highly unusual, planar Mo-B-Ga-Cl rhombus. The two reactions occur with opposite regiochemistry, with the Ga atom bound to the Fe atom in the former and to both the Mo and B atoms in the latter. The bonding in the Mo adduct and the reasons for the differing regiochemistry of the reaction are explored computationally.
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Affiliation(s)
- Holger Braunschweig
- Institut für Anorganische Chemie, Julius-Maximilians-Universität Würzburg , Am Hubland, 97074 Würzburg, Germany
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37
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Kong L, Li Y, Ganguly R, Vidovic D, Kinjo R. Isolation of a Bis(oxazol-2-ylidene)-Phenylborylene Adduct and its Reactivity as a Boron-Centered Nucleophile. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405201] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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38
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Kong L, Li Y, Ganguly R, Vidovic D, Kinjo R. Isolation of a Bis(oxazol-2-ylidene)-Phenylborylene Adduct and its Reactivity as a Boron-Centered Nucleophile. Angew Chem Int Ed Engl 2014; 53:9280-3. [DOI: 10.1002/anie.201405201] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Indexed: 11/08/2022]
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39
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Dettenrieder N, Aramaki Y, Wolf BM, Maichle-Mössmer C, Zhao X, Yamashita M, Nozaki K, Anwander R. Assessing the Brønsted Basicity of Diaminoboryl Anions: Reactivity toward Methylated Benzenes and Dihydrogen. Angew Chem Int Ed Engl 2014; 53:6259-62. [DOI: 10.1002/anie.201402175] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Indexed: 11/11/2022]
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40
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Dettenrieder N, Aramaki Y, Wolf BM, Maichle-Mössmer C, Zhao X, Yamashita M, Nozaki K, Anwander R. Zur Brønsted-Basizität von Diaminoboryl-Anionen: Reaktivität gegenüber methylierten Benzolverbindungen und Wasserstoff. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402175] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Borner C, Kleeberg C. Selective Synthesis of Unsymmetrical Diboryl PtIIand Diaminoboryl CuIComplexes by B-B Activation of Unsymmetrical Diboranes(4) {pinB-B[(NR)2C6H4]}. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402234] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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42
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Protchenko AV, Dange D, Schwarz AD, Tang CY, Phillips N, Mountford P, Jones C, Aldridge S. Heavy metal boryl chemistry: complexes of cadmium, mercury and lead. Chem Commun (Camb) 2014; 50:3841-4. [PMID: 24589585 DOI: 10.1039/c4cc00697f] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthetic routes to the first boryl complexes of cadmium and mercury are reported via transmetallation from boryllithium; the syntheses of related group 14 systems highlight the additional factors associated with extension to more redox-active post-transition elements.
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Affiliation(s)
- Andrey V Protchenko
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Rd, Oxford, UKOX1 3QR.
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43
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Wang B, Nishiura M, Cheng J, Hou Z. Half-sandwich scandium boryl complexes bearing a silylene-linked cyclopentadienyl-amido ligand. Dalton Trans 2014; 43:14215-8. [DOI: 10.1039/c4dt01725k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A boryl scandium complex supported by the silylene-linked cyclopentadienyl-amido ligand was synthesized for the first time.
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Affiliation(s)
- Baoli Wang
- Organometallic Chemistry Laboratory
- RIKEN
- Saitama 351-0198, Japan
| | - Masayoshi Nishiura
- Organometallic Chemistry Laboratory
- RIKEN
- Saitama 351-0198, Japan
- Advanced Catalysis Research Group
- RIKEN Center for Sustainable Resource Science
| | - Jianhua Cheng
- Organometallic Chemistry Laboratory
- RIKEN
- Saitama 351-0198, Japan
| | - Zhaomin Hou
- Organometallic Chemistry Laboratory
- RIKEN
- Saitama 351-0198, Japan
- Advanced Catalysis Research Group
- RIKEN Center for Sustainable Resource Science
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