151
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Zhang Z, Yang D, Wang J, Deng C, Gai H, Xiao M, Huang T, Zhu Q, Song H. How to active ethanolamine for selective hydrogenation by imidazolium-based cation and conjugated π bond. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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152
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Li J, Lu Z, Liu LL. A Free Phosphaborene Stable at Room Temperature. J Am Chem Soc 2022; 144:23691-23697. [PMID: 36520955 DOI: 10.1021/jacs.2c11878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Free phosphaborenes (R-P═B-R) are PB analogues of alkynes, and their isolation is a long-sought-after goal. Herein, we demonstrate that the combination of a π-donating and a π-accepting substituent with bulky flanking arene rings enables the isolation of a crystalline free phosphaborene 5 at room temperature. This electron push-pull cooperation, combined with the kinetic protection, hinders its inherent tendency to oligomerize. This species features a PB double bond consisting of a conventional σ bond and a delocalized π bond. The lone pair of electrons at P slightly contributes to the PB bonding. Preliminary reactivity studies show that 5 undergoes facile (cyclo)addition reactions with p-methyl benzaldehyde, p-fluoroacetophenone, and carbon disulfide, the last of which results in facile PB double bond cleavage. Our strategy has a significant impact on the future synthesis of ambiphilic heterodiatomic multiply bonded main group species.
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Affiliation(s)
- Jiancheng Li
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhihao Lu
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
| | - Liu Leo Liu
- Department of Chemistry and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, China
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153
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154
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Jörges M, Krischer F, Gessner VH. Transition metal-free ketene formation from carbon monoxide through isolable ketenyl anions. Science 2022; 378:1331-1336. [PMID: 36548404 DOI: 10.1126/science.ade4563] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The capacity of transition metals to bind and transform carbon monoxide (CO) is critical to its use in many chemical processes as a sustainable, inexpensive C1 building block. By contrast, only few s- and p-block element compounds bind and activate CO, and conversion of CO into useful carbonyl-containing organic compounds in such cases remains elusive. We report that metalated phosphorus ylides provide facile access to ketenyl anions ([RC=C=O]-) by phosphine displacement with CO. These anions are very stable and storable reagents with a distinctive electronic structure between that of the prototypical ketene (H2C=C=O) and that of ethynol (HC≡C-OH). Nonetheless, the ketenyl anions selectively react with a range of electrophiles at the carbon atom, thus offering high-yielding and versatile access to ketenes and related compounds.
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Affiliation(s)
- Mike Jörges
- Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Felix Krischer
- Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Viktoria H Gessner
- Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, 44801 Bochum, Germany
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155
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Helling C, Farmer JC, Wölper C, Kretschmer R, Schulz S. Bond Activation by a Bimetallic Ga I Complex: Avenue to Intermetallic Compounds. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Christoph Helling
- Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
| | - James C. Farmer
- Institute of Inorganic and Analytical Chemistry (IAAC), Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Christoph Wölper
- Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
| | - Robert Kretschmer
- Institute of Inorganic and Analytical Chemistry (IAAC), Friedrich Schiller University Jena, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, 07743 Jena, Germany
- Institute of Chemistry, Chemnitz University of Technology, 09112 Chemnitz, Germany
| | - Stephan Schulz
- Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
- Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, 45117 Essen, Germany
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156
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Nougué R, Takahashi S, Dajnak A, Maerten E, Baceiredo A, Saffon‐Merceron N, Branchadell V, Kato T. Labile Base-Stabilized Silyliumylidene Ions. Non-Metallic Species Capable of Activating Multiple Small Molecules. Chemistry 2022; 28:e202202037. [PMID: 36074891 PMCID: PMC10092131 DOI: 10.1002/chem.202202037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Indexed: 11/05/2022]
Abstract
Several base-stabilized silyliumylidene ions (2 and 3) with different ligands were synthesized. Their behaviour appeared strongly dependent on the nature of ligand. Indeed, in contrast to the poorly reactive silyliumylidene ions 3 c,d stabilized by strongly donating ligands (DMAP, NHC), the silylene- and sulfide-supported one (2-H and 3 a) exhibits higher reactivity toward various small molecules. Furthermore, their capability to successively activate multiple small molecules was clearly demonstrated by processes involving successive reactions with silane/formamide, CO2 and H2 . Moreover, HBPin adduct of 3 a (8-C) catalyzes the hydroboration of pyridine. Of particular interest, silylene-supported silyliumylidene complex 2-H is one of the rare species able to activate two H2 molecules.
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Affiliation(s)
- Raphaël Nougué
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069)Université de Toulouse,CNRS118 route de NarbonneF-31062ToulouseFrance
| | - Shintaro Takahashi
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069)Université de Toulouse,CNRS118 route de NarbonneF-31062ToulouseFrance
| | - Aymeric Dajnak
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069)Université de Toulouse,CNRS118 route de NarbonneF-31062ToulouseFrance
| | - Eddy Maerten
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069)Université de Toulouse,CNRS118 route de NarbonneF-31062ToulouseFrance
| | - Antoine Baceiredo
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069)Université de Toulouse,CNRS118 route de NarbonneF-31062ToulouseFrance
| | - Nathalie Saffon‐Merceron
- Institut de Chimie de Toulouse (FR 2599) UPS, and CNRS, ICT UAR2599118 route de NarbonneF-31062ToulouseFrance
| | - Vicenç Branchadell
- Departament de QuímicaUniversitat Autònoma de Barcelona08193BellaterraSpain
| | - Tsuyoshi Kato
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069)Université de Toulouse,CNRS118 route de NarbonneF-31062ToulouseFrance
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157
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Zhang L, Tu X, Han W, Chen L, Chen Y, Zheng H. The Efficient CO2 Fixation Catalyzed by Fe-Based Catalyst for Synthesizing Benzimidazoles. Catal Letters 2022. [DOI: 10.1007/s10562-022-04220-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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158
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Krüger J, Wölper C, Schulz S. Role of Group 13 Metals in the Electronic Properties of L(X)M-Substituted Pnictinidenes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Affiliation(s)
- Julia Krüger
- Institute of Inorganic Chemistry, University of Duisburg-Essen, Universitätsstraße 5-7, Essen 45141, Germany
| | - Christoph Wölper
- Institute of Inorganic Chemistry, University of Duisburg-Essen, Universitätsstraße 5-7, Essen 45141, Germany
| | - Stephan Schulz
- Institute of Inorganic Chemistry, University of Duisburg-Essen, Universitätsstraße 5-7, Essen 45141, Germany
- Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Carl-Benz-Straße 199, Duisburg 47057, Germany
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159
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Obi AD, Dickie DA, Tiznado W, Frenking G, Pan S, Gilliard RJ. A Multidimensional Approach to Carbodiphosphorane–Bismuth Coordination Chemistry: Cationization, Redox-Flexibility, and Stabilization of a Crystalline Bismuth Hydridoborate. Inorg Chem 2022; 61:19452-19462. [DOI: 10.1021/acs.inorgchem.2c03337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Akachukwu D. Obi
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Diane A. Dickie
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - William Tiznado
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 498, Santiago 8320000, Chile
| | - Gernot Frenking
- Philipps-Universität Marburg Hans-Meerwein-Straße, 35032 Marburg, Germany
| | - Sudip Pan
- Philipps-Universität Marburg Hans-Meerwein-Straße, 35032 Marburg, Germany
| | - Robert J. Gilliard
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
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160
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Kustiana BA, Melen RL, Morrill LC. One-Pot Synthesis of Styrene Derivatives from Allyl Silanes via B(C 6F 5) 3-Catalyzed Isomerization–Hiyama Coupling. Org Lett 2022; 24:8694-8697. [DOI: 10.1021/acs.orglett.2c03584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Betty A. Kustiana
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Rebecca L. Melen
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Louis C. Morrill
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
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161
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Kustiana BA, Elsherbeni SA, Linford‐Wood TG, Melen RL, Grayson MN, Morrill LC. B(C 6 F 5 ) 3 -Catalyzed E-Selective Isomerization of Alkenes. Chemistry 2022; 28:e202202454. [PMID: 35943082 PMCID: PMC9804281 DOI: 10.1002/chem.202202454] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Indexed: 01/05/2023]
Abstract
Herein, we report the B(C6 F5 )3 -catalyzed E-selective isomerization of alkenes. The transition-metal-free method is applicable across a diverse array of readily accessible substrates, giving access to a broad range of synthetically useful products containing versatile stereodefined internal alkenes. The reaction mechanism was investigated by using synthetic and computational methods.
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Affiliation(s)
- Betty A. Kustiana
- Cardiff Catalysis InstituteSchool of ChemistryCardiff University Main BuildingPark PlaceCardiffCF10 3ATUK
| | - Salma A. Elsherbeni
- Cardiff Catalysis InstituteSchool of ChemistryCardiff University Main BuildingPark PlaceCardiffCF10 3ATUK
| | | | - Rebecca L. Melen
- Cardiff Catalysis InstituteSchool of ChemistryCardiff University Main BuildingPark PlaceCardiffCF10 3ATUK
| | | | - Louis C. Morrill
- Cardiff Catalysis InstituteSchool of ChemistryCardiff University Main BuildingPark PlaceCardiffCF10 3ATUK
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162
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Sharma MK, Chabbra S, Wölper C, Weinert HM, Reijerse EJ, Schnegg A, Schulz S. Modulating the frontier orbitals of L(X)Ga-substituted diphosphenes [L(X)GaP] 2 (X = Cl, Br) and their facile oxidation to radical cations. Chem Sci 2022; 13:12643-12650. [PMID: 36519043 PMCID: PMC9645402 DOI: 10.1039/d2sc04207j] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 10/11/2022] [Indexed: 09/19/2023] Open
Abstract
Modulating the electronic structures of main group element compounds is crucial to control their chemical reactivity. Herein we report on the synthesis, frontier orbital modulation, and one-electron oxidation of two L(X)Ga-substituted diphosphenes [L(X)GaP]2 (X = Cl 2a, Br 2b; L = HC[C(Me)N(Ar)]2, Ar = 2,6-i-Pr2C6H3). Photolysis of L(Cl)GaPCO 1 gave [L(Cl)GaP]22a, which reacted with Me3SiBr with halide exchange to [L(Br)GaP]22b. Reactions with MeNHC (MeNHC = 1,3,4,5-tetramethylimidazol-2-ylidene) gave the corresponding carbene-coordinated complexes L(X)GaPP(MeNHC)Ga(X)L (X = Cl 3a, Br 3b). DFT calculations revealed that the carbene coordination modulates the frontier orbitals (i.e. HOMO/LUMO) of diphosphenes 2a and 2b, thereby affecting the reactivity of 3a and 3b. In marked contrast to diphosphenes 2a and 2b, the cyclic voltammograms (CVs) of the carbene-coordinated complexes each show one reversible redox event at E 1/2 = -0.65 V (3a) and -0.36 V (3b), indicating their one-electron oxidation to the corresponding radical cations as was confirmed by reactions of 3a and 3b with the [FeCp2][B(C6F5)4], yielding the radical cations [L(X)GaPP(MeNHC)Ga(X)L]B(C6F5)4 (X = Cl 4a, Br 4b). The unpaired spin in 4a (79%) and 4b (80%) is mainly located at the carbene-uncoordinated phosphorus atoms as was revealed by DFT calculations and furthermore experimentally proven in reactions with n Bu3SnH, yielding the diphosphane cations [L(X)GaPHP(MeNHC)Ga(X)L]B(C6F5)4 (X = Cl 5a, Br 5b). Compounds 2-5 were fully characterized by NMR and IR spectroscopy as well as by single crystal X-ray diffraction (sc-XRD), and compounds 4a and 4b were further studied by EPR spectroscopy, while their bonding nature was investigated by DFT calculations.
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Affiliation(s)
- Mahendra K Sharma
- Institute of Inorganic Chemistry, University of Duisburg-Essen Universitätsstraße 5-7, D-45141 Essen Germany https://www.uni-due.de/ak_schulz/index_en.php
| | - Sonia Chabbra
- EPR Research Group, Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34-36 Mülheim an der Ruhr D-45470 Germany
| | - Christoph Wölper
- Institute of Inorganic Chemistry, University of Duisburg-Essen Universitätsstraße 5-7, D-45141 Essen Germany https://www.uni-due.de/ak_schulz/index_en.php
| | - Hanns M Weinert
- Institute of Inorganic Chemistry, University of Duisburg-Essen Universitätsstraße 5-7, D-45141 Essen Germany https://www.uni-due.de/ak_schulz/index_en.php
| | - Edward J Reijerse
- EPR Research Group, Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34-36 Mülheim an der Ruhr D-45470 Germany
| | - Alexander Schnegg
- EPR Research Group, Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34-36 Mülheim an der Ruhr D-45470 Germany
| | - Stephan Schulz
- Institute of Inorganic Chemistry, University of Duisburg-Essen Universitätsstraße 5-7, D-45141 Essen Germany https://www.uni-due.de/ak_schulz/index_en.php
- Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen Carl-Benz-Straße 199 47057 Duisburg Germany
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163
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Saurwein A, Eisner T, Inoue S, Rieger B. Steric and Electronic Properties of Phosphinimide-Based Silylenes─The Influence of the Phosphine Moiety. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00466] [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)
- Andreas Saurwein
- WACKER-Chair of Macromolecular Chemistry, Technical University of Munich, 85748 Garching, Germany
- WACKER-Institute of Silicon Chemistry, Department of Chemistry, Technical University of Munich, 85748 Garching, Germany
| | - Teresa Eisner
- WACKER-Institute of Silicon Chemistry, Department of Chemistry, Technical University of Munich, 85748 Garching, Germany
| | - Shigeyoshi Inoue
- WACKER-Institute of Silicon Chemistry, Department of Chemistry, Technical University of Munich, 85748 Garching, Germany
| | - Bernhard Rieger
- WACKER-Chair of Macromolecular Chemistry, Technical University of Munich, 85748 Garching, Germany
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164
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Morris LJ, Rajeshkumar T, Maron L, Okuda J. Reversible Oxidative Addition of Zinc Hydride at a Gallium(I)-Centre: Labile Mono- and Bis(hydridogallyl)zinc Complexes. Chemistry 2022; 28:e202201480. [PMID: 35819049 PMCID: PMC9804236 DOI: 10.1002/chem.202201480] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Indexed: 01/05/2023]
Abstract
In the presence of TMEDA (N,N,N',N'-tetramethylethylenediamine), partially deaggregated zinc dihydride as hydrocarbon suspensions react with the gallium(I) compound [(BDI)Ga] (I, BDI={HC(C(CH3 )N(2,6-iPr2 -C6 H3 ))2 }- ) by formal oxidative addition of a Zn-H bond to the gallium(I) centre. Dissociation of the labile TMEDA ligand in the resulting complex [(BDI)Ga(H)-(H)Zn(tmeda)] (1) facilitates insertion of a second equiv. of I into the remaining Zn-H to form a thermally sensitive trinuclear species [{(BDI)Ga(H)}2 Zn] (2). Compound 1 exchanges with polymeric zinc dideuteride [ZnD2 ]n in the presence of TMEDA, and with compounds I and 2 via sequential and reversible ligand dissociation and gallium(I) insertion. Spectroscopic and computational studies demonstrate the reversibility of oxidative addition of each Zn-H bond to the gallium(I) centres.
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Affiliation(s)
- Louis J. Morris
- Institute for Inorganic ChemistryRWTH Aachen University52062AachenGermany
- Chemistry Research LaboratoryUniversity of OxfordOxfordOX1 3TAUnited Kingdom
| | | | - Laurent Maron
- CNRSINSAUPSUMR 5215LPCNOUniversité de Toulouse31077ToulouseFrance
| | - Jun Okuda
- Institute for Inorganic ChemistryRWTH Aachen University52062AachenGermany
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165
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Navarro M, Moreno JJ, Pérez-Jiménez M, Campos J. Small molecule activation with bimetallic systems: a landscape of cooperative reactivity. Chem Commun (Camb) 2022; 58:11220-11235. [PMID: 36128973 PMCID: PMC9536487 DOI: 10.1039/d2cc04296g] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 09/06/2022] [Indexed: 11/22/2022]
Abstract
There is growing interest in the design of bimetallic cooperative complexes, which have emerged due to their potential for bond activation and catalysis, a feature widely exploited by nature in metalloenzymes, and also in the field of heterogeneous catalysis. Herein, we discuss the widespread opportunities derived from combining two metals in close proximity, ranging from systems containing multiple M-M bonds to others in which bimetallic cooperation occurs even in the absence of M⋯M interactions. The choice of metal pairs is crucial for the reactivity of the resulting complexes. In this context, we describe the prospects of combining not only transition metals but also those of the main group series, which offer additional avenues for cooperative pathways and reaction discovery. Emphasis is given to mechanisms by which bond activation occurs across bimetallic structures, which is ascribed to the precise synergy between the two metal atoms. The results discussed herein indicate a future landscape full of possibilities within our reach, where we anticipate that bimetallic synergism will have an important impact in the design of more efficient catalytic processes and the discovery of new catalytic transformations.
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Affiliation(s)
- Miquel Navarro
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain.
| | - Juan José Moreno
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain.
| | - Marina Pérez-Jiménez
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain.
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Avenida Américo Vespucio 49, 41092 Sevilla, Spain.
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166
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Sun X, Hinz A, Kucher H, Gamer MT, Roesky PW. Stereoselective Activation of Small Molecules by a Stable Chiral Silene. Chemistry 2022; 28:e202201963. [PMID: 35762907 DOI: 10.1002/chem.202201963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Indexed: 01/07/2023]
Abstract
The reaction of the dilithium salt of the enantiopure (S)-BINOL (1,1'-bi-2-naphthol) with two equivalents of the amidinate-stabilized chlorosilylene [LPh SiCl] (LPh =PhC(NtBu)2 ) led to the formation of the first example of a chiral cyclic silene species comprising an (S)-BINOL ligand. The reactivity of the Si=C bond was investigated by reaction with elemental sulfur, CO2 and HCl. The reaction with S8 led to a Si=C bond cleavage and concomitantly to a ring-opened product with imine and silanethione functional groups. The reaction with CO2 resulted in the cleavage of the CO2 molecule into a carbonyl group and an isolated O atom, while a new stereocenter is formed in a highly selective manner. According to DFT calculations, the [2+2] cycloaddition product is the key intermediate. Further reactivity studies of the chiral cyclic silene with HCl resulted in a stereoselective addition to the Si=C bond, while the fully selective formation of two stereocenters was achieved. The quantitative stereoselective addition of CO2 and HCl to a Si=C bond is unprecedented.
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Affiliation(s)
- Xiaofei Sun
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, 76131, Karlsruhe, Germany
| | - Alexander Hinz
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, 76131, Karlsruhe, Germany
| | - Hannes Kucher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, 76131, Karlsruhe, Germany
| | - Michael T Gamer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, 76131, Karlsruhe, Germany
| | - Peter W Roesky
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, 76131, Karlsruhe, Germany
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167
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Nag E, Francis M, Battuluri S, Sinu BB, Roy S. Isolation of Elusive Phosphinidene‐Chlorotetrylenes: The Heavier Cyanogen Chloride Analogues. Chemistry 2022; 28:e202201242. [DOI: 10.1002/chem.202201242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Indexed: 11/09/2022]
Affiliation(s)
- Ekta Nag
- Department of Chemistry Indian Institute of Science Education and Research (IISER) Tirupati Tirupati 517507 India
| | - Maria Francis
- Department of Chemistry Indian Institute of Science Education and Research (IISER) Tirupati Tirupati 517507 India
| | - Sridhar Battuluri
- Department of Chemistry Indian Institute of Science Education and Research (IISER) Tirupati Tirupati 517507 India
| | - Bhavya Bini Sinu
- Department of Chemistry Indian Institute of Science Education and Research (IISER) Tirupati Tirupati 517507 India
| | - Sudipta Roy
- Department of Chemistry Indian Institute of Science Education and Research (IISER) Tirupati Tirupati 517507 India
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168
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Zhao X, Szilvási T, Hanusch F, Kelly JA, Fujimori S, Inoue S. Isolation and Reactivity of Tetrylene-Tetrylone-Iron Complexes Supported by Bis(N-Heterocyclic Imine) Ligands. Angew Chem Int Ed Engl 2022; 61:e202208930. [PMID: 35925668 PMCID: PMC9804675 DOI: 10.1002/anie.202208930] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Indexed: 01/09/2023]
Abstract
The germanium iron carbonyl complex 3 was prepared by the reaction of dimeric chloro(imino)germylene [IPrNGeCl]2 (IPrN=bis(2,6-diisopropylphenyl)imidazolin-2-iminato) with one equivalent of Collman's reagent (Na2 Fe(CO)4 ) at room temperature. Similarly, the reaction of chloro(imino)stannylene [IPrNSnCl]2 with Na2 Fe(CO)4 (1 equiv) resulted in the Fe(CO)4 -bridged bis(stannylene) complex 4. We observed reversible formation of bis(tetrylene) and tetrylene-tetrylone character in complexes 3 vs. 5 and 4 vs. 6, which was supported by DFT calculations. Moreover, the Li/Sn/Fe trimetallic complex 12 has been isolated from the reaction of [IPrNSnCl]2 with cyclopentadienyl iron dicarbonyl anion. The computational analysis further rationalizes the reduction pathway from these chlorotetrylenes to the corresponding complexes.
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Affiliation(s)
- Xuan‐Xuan Zhao
- School of Natural SciencesDepartment of ChemistryWACKER-Institute of Silicon Chemistry and Catalysis Research CenterTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
| | - Tibor Szilvási
- Department of Chemical and Biological EngineeringUniversity of AlabamaTuscaloosaAL 35487USA
| | - Franziska Hanusch
- School of Natural SciencesDepartment of ChemistryWACKER-Institute of Silicon Chemistry and Catalysis Research CenterTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
| | - John A. Kelly
- School of Natural SciencesDepartment of ChemistryWACKER-Institute of Silicon Chemistry and Catalysis Research CenterTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
| | - Shiori Fujimori
- School of Natural SciencesDepartment of ChemistryWACKER-Institute of Silicon Chemistry and Catalysis Research CenterTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
| | - Shigeyoshi Inoue
- School of Natural SciencesDepartment of ChemistryWACKER-Institute of Silicon Chemistry and Catalysis Research CenterTechnische Universität MünchenLichtenbergstraße 485748Garching bei MünchenGermany
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169
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Hollingsworth WM, Hill EA. Exploring the potential role of heavy pnictogen elements in ligand design for new metal-ligand cooperative chemistry. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2124863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- W. M. Hollingsworth
- Department of Chemistry and Biochemistry, Auburn University, Auburn, AL, USA
| | - E. A. Hill
- Department of Chemistry and Biochemistry, Auburn University, Auburn, AL, USA
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170
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Schwamm RJ, Kilpatrick AFR, Coles MP. Catenated (Bi)
n
(
n
=2, 3, 4) Complexes with Formally Monovalent Bismuth Centres. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200260] [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)
- Ryan J. Schwamm
- School of Chemical and Physical Sciences Victoria University of Wellington Wellington PO Box 6012 New Zealand
| | | | - Martyn P. Coles
- School of Chemical and Physical Sciences Victoria University of Wellington Wellington PO Box 6012 New Zealand
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171
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Zhang X, Mei Y, Liu LL. Free Aluminylenes: An Emerging Class of Compounds. Chemistry 2022; 28:e202202102. [DOI: 10.1002/chem.202202102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Xin Zhang
- Department of Chemistry Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Yanbo Mei
- Department of Chemistry Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
| | - Liu Leo Liu
- Department of Chemistry Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis Southern University of Science and Technology Shenzhen 518055 China
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172
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Deoxygenating Reduction of CO 2 by [Cp*Al] 4 to Form a (Al 3O 2C) 2 Cluster Featuring Two Ketene Moieties. Inorg Chem 2022; 61:14500-14505. [PMID: 36053858 DOI: 10.1021/acs.inorgchem.2c01587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein we report that the reaction of the low-valent aluminum(I) species [Cp*Al]4 (Cp* = pentamethylcyclopentadienyl) with CO2 exhibits complete cleavages of the C═O bonds. The deoxygenating reduction reaction of [Cp*Al]4 with CO2 at 120 °C afforded [(Cp*)3Al3O2C(CO)]2 (1), which featured two stacked (Al3O2C)2 units and two C═C═O ketene moieties. Moreover, the isoelectronic analogues of diimine and isothiocyanate with CO2 were also investigated, and the reactions of [Cp*Al]4 with Dipp*-N═C═N-Dipp* and Dipp-C═N═S [Dipp* = 2,6-bis(diphenylmethyl)-4-tert-butylphenyl; Dipp = 2,6-diisopropylphenyl] afforded dialuminylimine (2) and tetrameric [Cp*AlS]4 (3), respectively.
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173
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Hynes T, Masuda JD, Chitnis SS. Mesomeric Tuning at Planar Bi centres: Unexpected Dimerization and Benzyl C‐H Activation in [CN2]Bi Complexes. Chempluschem 2022; 87:e202200244. [DOI: 10.1002/cplu.202200244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/01/2022] [Indexed: 11/11/2022]
Affiliation(s)
| | | | - Saurabh S. Chitnis
- Dalhousie University Department of Chemistry Chemistry Building, 6274 Coburg Road B3H 4R2 Halifax CANADA
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174
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Torquato NA, Lara JK, Bertrand QC, Mrse AA, Gembicky M, Kubiak CP. Electronic structural studies of µ3-Sn(OR)3 capped trinuclear nickel clusters. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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175
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Parambath S, Parameswaran P. Two σ- and two π-dative quadruple bonds between the s-block element and transition metal in [BeM(CO) 4; M = Fe - Os]. Phys Chem Chem Phys 2022; 24:20183-20188. [PMID: 35997149 DOI: 10.1039/d2cp02331h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the chemical bonding and reactivity of the first example of neutral 18 valence electron transition metal complexes of beryllium, [BeM(CO)4; M = Fe - Os], in trigonal bipyramidal coordination geometry, where the bonding between the transition metal and the s-block element beryllium (M-Be) can be best described by dative quadruple bonds. In contrast to the conventional multiple bonding pattern, the quadruple bonds comprise two σ-bonds and two π-bonds, viz., one Be → M σ-bond, one M → Be σ-bond, and two M → Be π-bonds. Since the M-Be quadruple bonds are described by dative interactions, the Be centre shows ambiphilic character as indicated by the high proton and hydride affinity values.
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Affiliation(s)
- Sneha Parambath
- Department of Chemistry, National Institute of Technology Calicut, Kerala, India.
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176
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Pradhan S, Sankar RV, Gunanathan C. A Boron-Nitrogen Double Transborylation Strategy for Borane-Catalyzed Hydroboration of Nitriles. J Org Chem 2022; 87:12386-12396. [PMID: 36045008 DOI: 10.1021/acs.joc.2c01655] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Organoborane-catalyzed hydroboration of nitriles provides N,N-diborylamines, which act as efficient synthons for the synthesis of primary amines and secondary amides. Known nitrile hydroboration methods are dominated by metal catalysis. Simple and metal-free hydroboration of nitriles using diborane [H-B-9-BBN]2 as a catalyst and pinacolborane as a turnover reagent is reported. The reaction of monomeric H-B-9-BBN with nitriles leads to the hydrido-bridged diborylimine intermediate; a subsequent sequential double hydroboration-transborylation pathway involving B-N/B-H σ bond metathesis is proposed.
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Affiliation(s)
- Subham Pradhan
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar 752050, India
| | - Raman Vijaya Sankar
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar 752050, India
| | - Chidambaram Gunanathan
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar 752050, India
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177
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Pan X, Wu C, Fang H, Yan C. Early Lanthanide(III) Ate Complexes Featuring Ln-Si Bonds (Ln = La, Ce): Synthesis, Structural Characterization, and Bonding Analysis. Inorg Chem 2022; 61:14288-14296. [PMID: 36040364 DOI: 10.1021/acs.inorgchem.2c01830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
While research on lanthanide (Ln) complexes with silyl ligands is receiving growing attention, significantly unbalanced efforts have been devoted to different Ln elements. In comparison with the intense investigations on Ln elements such as Sm and Yb, the chemistry of silyl lanthanum and cerium complexes is much slower to develop, and no solid-state structure of a silyl lanthanum complex has been reported so far. In this research, four types of ate complexes, including [(DME)3Li][Cp3LnSi(H)Mes2], [(18-crown-6)K][Cp3LnSi(CH3)Ph2], [(DME)3Li][Cp3LnSiPh3], and [(12-crown-4)2Na] [Cp3LnSi(Ph)2Si(H)Ph2] (Ln = La, Ce), were synthesized by reacting [(DME)3Na][Cp3La(μ-Cl)LaCp3] or Cp3Ce(THF) with alkali metal silanides. All of the synthesized silyl Ln ate complexes were structurally characterized. La-Si bond lengths are in a range of 3.1733(4)-3.1897(10) Å, and the calculated formal shortness ratios of the La-Si bonds (1.071.08) are comparable to those in the reported silyl complexes having other Ln metal centers. The Ce-Si bond lengths (3.1415(6)-3.1705(9) Å) are within the typical range of reported silyl cerium ate complexes. 29Si solid-state NMR measurements on the diamagnetic silyl lanthanum complexes were conducted, and large one-bond hyperfine splitting constants arising from = 7/2) were resolved. Computational studies on these silyl lanthanum and cerium complexes suggested the polarized covalent feature of the Ln-Si bonds, which is in line with the measured large 1J139La-Si splitting constants.
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Affiliation(s)
- Xiaowei Pan
- School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China
| | - Changjiang Wu
- School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China
| | - Huayi Fang
- School of Materials Science and Engineering, Tianjin Key Lab for Rare Earth Materials and Applications, Nankai University, Tianjin 300350, China
| | - Chunhua Yan
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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178
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Bücker A, Wölper C, Haberhauer G, Schulz S. Structurally characterised intermediate of the oxidative addition of a heteroleptic germylene to gallanediyle. Chem Commun (Camb) 2022; 58:9758-9761. [PMID: 35959720 DOI: 10.1039/d2cc03561h] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Bond activation reactions using main group metal complexes are gaining increasing interest. We report on reactions of LGa (L = HC[C(Me)N(Ar)]2, Ar = Dipp = 2,6-i-Pr2C6H3,) with heteroleptic tetrylenes L'ECl (E = Ge, Sn; L' = N(SiMe3)Ar), yielding the donor-acceptor complex LGa-Sn(Cl)L' (1) or the oxidative addition product L(Cl)GaGeL' (3). The reaction with DMPGeCl (DMP = 2,6-Mes2C6H3, Mes = 2,4,6-Me3C6H2) yielded LGa(μ-Cl)GeDMP (2), which represents an intermediate of the oxidative addition reaction. 1-3 were characterized by NMR and IR spectroscopy as well as by single crystal X-ray diffraction (sc-XRD), while their electronic nature was analyzed by quantum chemical calculations.
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Affiliation(s)
- Anna Bücker
- Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany.
| | - Christoph Wölper
- Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany.
| | - Gebhard Haberhauer
- Institute of Organic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany
| | - Stephan Schulz
- Institute of Inorganic Chemistry, University of Duisburg-Essen, 45117 Essen, Germany. .,Center for Nanointegration Duisburg-Essen (Cenide), University of Duisburg-Essen, 47057 Duisburg, Germany
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179
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Wang Y, Tran PM, Lahm ME, Xie Y, Wei P, Adams ER, Glushka JN, Ren Z, Popik VV, Schaefer HF, Robinson GH. Activation of Ammonia by a Carbene-Stabilized Dithiolene Zwitterion. J Am Chem Soc 2022; 144:16325-16331. [PMID: 36037279 DOI: 10.1021/jacs.2c07920] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A carbene-stabilized dithiolene zwitterion (3) activates ammonia, affording 4• and 5, through both single-electron transfer (SET) and hydrogen atom transfer (HAT). Reaction products were characterized spectroscopically and by single-crystal X-ray diffraction. The mechanism of the formation of 4• and 5 was probed by experimental and computational methods. This discovery is the first example of metal-free ammonia activation via HAT.
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Affiliation(s)
- Yuzhong Wang
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Phuong M Tran
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Mitchell E Lahm
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Yaoming Xie
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Pingrong Wei
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Earle R Adams
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - John N Glushka
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Zichun Ren
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Vladimir V Popik
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Henry F Schaefer
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Gregory H Robinson
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
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180
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Wang C, Han Y, Tian M, Li L, Lin J, Wang X, Zhang T. Main-Group Catalysts with Atomically Dispersed In Sites for Highly Efficient Oxidative Dehydrogenation. J Am Chem Soc 2022; 144:16855-16865. [PMID: 36006855 DOI: 10.1021/jacs.2c04926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Transition metal oxides are well-known catalysts for oxidative dehydrogenation thanks to their excellent ability to activate alkanes. However, they suffer from an inferior alkene yield due to the trade-off between the conversion and selectivity induced by more reactive alkenes than alkanes, which obscures the optimization of catalysts. Herein, we attempt to overcome this challenge by activating a selective main-group indium oxide considered to be inactive for oxidative dehydrogenation in conventional wisdom. Atomically dispersed In sites with the local structure of [InOH]2+ anchored by substituting the protons of supercages in HY are enclosed to be active centers that enable the activation of ethane with a metal-normalized turnover number of almost one magnitude higher than those of their supported In2O3 counterparts. Furthermore, the structure of isolated [InOH]2+ sites could be stabilized by in situ formed H2O from the selective oxidation of hydrogen by In2O3 nanoparticles. As a result, the as-designed main-group In catalysts exhibit 80% ethene selectivity at 80% ethane conversion, thus achieving 60% ethene yield due to active isolated [InOH]2+ sites and selective In2O3 nanoparticles, outperforming state-of-the-art transition metal oxide catalysts. This study unlocks new opportunities for the utilization of main-group elements and could pave the way toward a more rational design of catalysts for highly efficient selective oxidation catalysis.
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Affiliation(s)
- Chaojie Wang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People's Republic of China.,University of Chinese Academy of Sciences, 19(A) Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
| | - Yujia Han
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People's Republic of China.,University of Chinese Academy of Sciences, 19(A) Yuquan Road, Shijingshan District, Beijing 100049, People's Republic of China
| | - Ming Tian
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People's Republic of China
| | - Lin Li
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People's Republic of China
| | - Jian Lin
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People's Republic of China
| | - Xiaodong Wang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People's Republic of China
| | - Tao Zhang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People's Republic of China
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181
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Sarkar D, Groll L, Munz D, Hanusch F, Inoue S. Ligand Assisted CO2 Sequestration and Catalytic Valorization by an NHI‐Stabilized Stannylene. ChemCatChem 2022. [DOI: 10.1002/cctc.202201048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Debotra Sarkar
- Technical University of Munich: Technische Universitat Munchen Department of Chemistry GERMANY
| | - Lisa Groll
- Technical University Munich: Technische Universitat Munchen Department of Chemistry GERMANY
| | - Dominik Munz
- Saarland University - Campus Saarbrucken: Universitat des Saarlandes Inorganic Chemistry GERMANY
| | - Franziska Hanusch
- Technical University of Munich: Technische Universitat Munchen Department of Chemistry GERMANY
| | - Shigeyoshi Inoue
- Technische Universität München Fakultät für Chemie Lichtenbergstraße 485748 Garching 85748 Garching bei München GERMANY
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182
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Vasko P, Lau CW. Oxidative addition or Werner coordination complex? Reactivity of β-diketiminate supported main group and first-row transition metal complexes towards ammonia. Dalton Trans 2022; 51:13444-13450. [PMID: 35993809 DOI: 10.1039/d2dt02427f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of neutral LM (L = [HC{(H3C)C(Dipp)N}2], Dipp = 2,6-iPr2C6H3, M = group 13: B-In, TM: Fe, Co, Ni, Cu) and L'M (L' = [HC{(CCH2)(CCH3)(DippN)2}], M = group 14: C-Pb) compounds including a main group 13/14 and first-row transition metal complexes were studied computationally by density functional theory (DFT). The optimised complexes were assessed in terms of structural parameters and electronic structures to find trends and characteristics that could be used to predict their reactivity towards ammonia. In addition, the differences in oxidative addition and Werner coordination complex formation depending on the identity of the central element were investigated and the Werner complexes were evaluated by QTAIM and EDA-NOCV approaches. The computational results complement the earlier experimental studies and shed light on the feasibility of isolating novel main group Werner complexes or transition metal oxidative addition products.
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Affiliation(s)
- Petra Vasko
- Department of Chemistry, University of Helsinki, A. I. Virtasen aukio 1, P.O. Box 55, 00014 Helsinki, Finland.
| | - Cheuk W Lau
- Department of Chemistry, University of Helsinki, A. I. Virtasen aukio 1, P.O. Box 55, 00014 Helsinki, Finland.
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183
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Chaturvedi A, McCarver GA, Sinha S, Hix EG, Vogiatzis KD, Jiang J. A PEGylated Tin Porphyrin Complex for Electrocatalytic Proton Reduction: Mechanistic Insights into Main‐Group‐Element Catalysis. Angew Chem Int Ed Engl 2022; 61:e202206325. [DOI: 10.1002/anie.202206325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Ashwin Chaturvedi
- Department of Chemistry University of Cincinnati Cincinnati OH 45221 USA
| | - Gavin A. McCarver
- Department of Chemistry University of Tennessee Knoxville TN 37996-1600 USA
| | - Soumalya Sinha
- Department of Chemistry University of Cincinnati Cincinnati OH 45221 USA
| | - Elijah G. Hix
- Department of Chemistry University of Tennessee Knoxville TN 37996-1600 USA
| | | | - Jianbing Jiang
- Department of Chemistry University of Cincinnati Cincinnati OH 45221 USA
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184
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Planas O, Peciukenas V, Leutzsch M, Nöthling N, Pantazis DA, Cornella J. Mechanism of the Aryl-F Bond-Forming Step from Bi(V) Fluorides. J Am Chem Soc 2022; 144:14489-14504. [PMID: 35921250 PMCID: PMC9394462 DOI: 10.1021/jacs.2c01072] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Indexed: 01/10/2023]
Abstract
In this article, we describe a combined experimental and theoretical mechanistic investigation of the C(sp2)-F bond formation from neutral and cationic high-valent organobismuth(V) fluorides, featuring a dianionic bis-aryl sulfoximine ligand. An exhaustive assessment of the substitution pattern in the ligand, the sulfoximine, and the reactive aryl on neutral triarylbismuth(V) difluorides revealed that formation of dimeric structures in solution promotes facile Ar-F bond formation. Noteworthy, theoretical modeling of reductive elimination from neutral bismuth(V) difluorides agrees with the experimentally determined kinetic and thermodynamic parameters. Moreover, the addition of external fluoride sources leads to inactive octahedral anionic Bi(V) trifluoride salts, which decelerate reductive elimination. On the other hand, a parallel analysis for cationic bismuthonium fluorides revealed the crucial role of tetrafluoroborate anion as fluoride source. Both experimental and theoretical analyses conclude that C-F bond formation occurs through a low-energy five-membered transition-state pathway, where the F anion is delivered to a C(sp2) center, from a BF4 anion, reminiscent of the Balz-Schiemann reaction. The knowledge gathered throughout the investigation permitted a rational assessment of the key parameters of several ligands, identifying the simple sulfone-based ligand family as an improved system for the stoichiometric and catalytic fluorination of arylboronic acid derivatives.
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Affiliation(s)
- Oriol Planas
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Vytautas Peciukenas
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Markus Leutzsch
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Nils Nöthling
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Dimitrios A. Pantazis
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Josep Cornella
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
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185
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Khan S, Hossain J, Parvin N, Shah BK. Four‐Coordinate Germylene and Stannylene and their Reactivity towards Se & Te. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200164] [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)
- Shabana Khan
- INDIAN INSTITUTE OF SCIENCE EDUCATION AND RESEARCH PUNE CHEMISTRY HOMI BHABA ROADPASHANPUNE 411008 PUNE INDIA
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186
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Inoue S, Melen RL, Harder S. Main Group Catalysis. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Shigeyoshi Inoue
- Department of Chemistry, Institute of Silicon Chemistry and Catalysis Research Center Technische Universität München Lichtenbergstraße 4 85748 Garching bei München Germany
| | - Rebecca L. Melen
- Cardiff Catalysis Institute, School of Chemistry Cardiff University Main Building, Park Place CF10 3AT Wales UK
| | - Sjoerd Harder
- Inorganic and Organometallic Chemistry Alexander-Friedrich-University Erlangen-Nürnberg Egerlandstrasse 1 91058 Erlangen Germany
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187
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Dasgupta A, van Ingen Y, Guerzoni MG, Farshadfar K, Rawson JM, Richards E, Ariafard A, Melen RL. Lewis Acid Assisted Brønsted Acid Catalysed Decarbonylation of Isocyanates: A Combined DFT and Experimental Study. Chemistry 2022; 28:e202201422. [PMID: 35560742 PMCID: PMC9541586 DOI: 10.1002/chem.202201422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Indexed: 12/16/2022]
Abstract
An efficient and mild reaction protocol for the decarbonylation of isocyanates has been developed using catalytic amounts of Lewis acidic boranes. The electronic nature (electron withdrawing, electron neutral, and electron donating) and the position of the substituents (ortho/meta/para) bound to isocyanate controls the chain length and composition of the products formed in the reaction. Detailed DFT studies were undertaken to account for the formation of the mono/di-carboxamidation products and benzoxazolone compounds.
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Affiliation(s)
- Ayan Dasgupta
- Cardiff Catalysis InstituteSchool of ChemistryCardiff University main BuildingPark PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Yara van Ingen
- Cardiff Catalysis InstituteSchool of ChemistryCardiff University main BuildingPark PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Michael G. Guerzoni
- Cardiff Catalysis InstituteSchool of ChemistryCardiff University main BuildingPark PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Kaveh Farshadfar
- Department of ChemistryIslamic Azad UniversityCentral TehranBranch, PoonakTehran1469669191Iran
| | - Jeremy M. Rawson
- Department of Chemistry and BiochemistryUniversity of Windsor401 Sunset Ave.WindsorON N9B 3P4Canada
| | - Emma Richards
- Cardiff Catalysis InstituteSchool of ChemistryCardiff University main BuildingPark PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
| | - Alireza Ariafard
- School of Natural Sciences-ChemistryUniversity of TasmaniaPrivate Bag 75HobartTasmania7001Australia
| | - Rebecca L. Melen
- Cardiff Catalysis InstituteSchool of ChemistryCardiff University main BuildingPark PlaceCardiffCF10 3ATCymru/WalesUnited Kingdom
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188
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Bajo S, Theulier CA, Campos J. Mechanistic Investigations on Hydrogenation, Isomerization and Hydrosilylation Reactions Mediated by a Germyl-Rhodium System. ChemCatChem 2022; 14:e202200157. [PMID: 36032040 PMCID: PMC9401076 DOI: 10.1002/cctc.202200157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 05/09/2022] [Indexed: 11/07/2022]
Abstract
We recently disclosed a dehydrogenative double C-H bond activation reaction in the unusual pincer-type rhodium-germyl complex [(ArMes)2ClGeRh] (ArMes=C6H3-2,6-(C6H2-2,4,6-Me3)2). Herein we investigate the catalytic applications of this Rh/Ge system in several transformations, namely trans-semihydrogenation of internal alkynes, trans-isomerization of olefins and hydrosilylation of alkynes. We have compared the activity and selectivity of this catalyst against other common rhodium precursors, as well as related sterically hindered rhodium complexes, being the one with the germyl fragment superior in terms of selectivity towards E-isomers. To increase this selectivity, a tandem catalytic protocol that incorporates the use of a heterogeneous catalyst for the trans-semihydrogenation of internal alkynes has been devised. Kinetic mechanistic investigations provide important information regarding the individual catalytic cycles that comprise the overall trans-semihydrogenation of internal alkynes.
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Affiliation(s)
- Sonia Bajo
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla.Avenida Américo Vespucio 4941092SevillaSpain
| | - Cyril A. Theulier
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla.Avenida Américo Vespucio 4941092SevillaSpain
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ)Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla.Avenida Américo Vespucio 4941092SevillaSpain
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189
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Zhao XX, Szilvási T, Hanusch F, Kelly J, Fujimori S, Inoue S. Isolation and Reactivity of Tetrylene‐Tetrylone‐Iron Complexes Supported by Bis(N‐Heterocyclic Imine) Ligands. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xuan-Xuan Zhao
- Technische Universität München: Technische Universitat Munchen Department of Chemistry GERMANY
| | - Tibor Szilvási
- The University of Alabama Department of Chemical and Biological Engineering UNITED STATES
| | - Franziska Hanusch
- Technische Universität München: Technische Universitat Munchen Department of Chemistry GERMANY
| | - John Kelly
- Technische Universität München: Technische Universitat Munchen Department of Chemistry GERMANY
| | - Shiori Fujimori
- Technische Universität München: Technische Universitat Munchen Department of Chemistry GERMANY
| | - Shigeyoshi Inoue
- Technische Universität München Fakultät für Chemie Lichtenbergstraße 485748 Garching 85748 Garching bei München GERMANY
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190
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Synthesis of a low-valent Al 4+ cluster cation salt. Nat Chem 2022; 14:1151-1157. [PMID: 35927330 DOI: 10.1038/s41557-022-01000-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 06/15/2022] [Indexed: 11/08/2022]
Abstract
Low-valent aluminium compounds are very reactive main-group species and have therefore been widely investigated. Since the isolation of a stable molecular Al(I) compound in 1991, [(AlCp*)4] (Cp* = [C5Me5]-), a variety of highly reactive neutral or anionic low-valent aluminium complexes have been developed. By contrast, their cationic counterparts have remained difficult to access. Here, we report the synthesis of [Al(AlCp*)3]+[Al(ORF)4]- (RF = C(CF3)3) through a simple metathesis reaction between [(AlCp*)4] and Li[Al(ORF)4]. Unexpectedly, the [Al(AlCp*)3]+ salt forms a dimer in the solid state and concentrated solutions. Addition of Lewis bases results in monomerization and coordination to the unique formal Al+ atom, giving [(L)xAl(AlCp*)3]+ salts where L is hexaphenylcarbodiphosphorane (x = 1), tetramethylethylenediamine (x = 1) or 4-dimethylaminopyridine (x = 3). The Al+-AlCp* bonds in the resulting [(L)xAl(AlCp*)3]+ cluster cations can be finely tuned between very strong (with no ligand L) to very weak and approaching isolated [Al(L)3]+ ions (when L is dimethylaminopyridine).
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191
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Manke DR, Golen JA, Stennett CR, Naeem M, Javier-Jimenez DR, Power PP. Reusing meta-terphenyl ligands: Synthesis, metalation and recycling of 5-pyrrolidino-m-terphenyl. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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192
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Synthesis and reactivity of the complexes [(dpp-bian)SiCl2] and [(dpp-bian)Si{FeCp(CO)}2(μ-CO)] (dpp-bian is 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene). Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3587-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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193
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Banerjee S, Vanka K. Computational insights into hydroboration with acyclic α-Borylamido-germylene and stannylene catalysts: Cooperative dual catalysis the key to system efficiency. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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194
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Wu M, He Y, Zhang L, Wei R, Wang D, Liu J, Liu LL, Tan G. An Acyclic Silylone Stabilized by Mesoionic Carbene. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Yuhao He
- Soochow University Chemistry CHINA
| | - Li Zhang
- Guangxi University of Science and Technology Chemistry CHINA
| | - Rui Wei
- Southern University of Science and Technology Chemistry CHINA
| | | | | | - Liu Leo Liu
- SUSTC: Southern University of Science and Technology Chemistry CHINA
| | - Gengwen Tan
- Soochow University College of Chemistry, Chemical Engineering and Materials Science Ren'ai Road #199 215123 Suzhou CHINA
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195
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Schoening J, Gehlhaar A, Wölper C, Schulz S. Selective [2+1+1] Fragmentation of P 4 by heteroleptic Metallasilylenes. Chemistry 2022; 28:e202201031. [PMID: 35638137 PMCID: PMC9400957 DOI: 10.1002/chem.202201031] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Indexed: 11/30/2022]
Abstract
Small-molecule activation by low-valent main-group element compounds is of general interest. We here report the synthesis and characterization (1 H, 13 C, 29 Si NMR, IR, sc-XRD) of heteroleptic metallasilylenes L1 (Cl)MSiL2 (M=Al 1, Ga 2, L1 =HC[C(Me)NDipp]2 , Dipp=2,6-i Pr2 C6 H3 ; L2 =PhC(Nt Bu)2 ). Their electronic nature was analyzed by quantum chemical computations, while their promising potential in small-molecule activation was demonstrated in reactions with P4 , which occurred with unprecedented [2+1+1] fragmentation of the P4 tetrahedron and formation of L1 (Cl)MPSi(L2 )PPSi(L2 )PM(Cl)L1 (M=Al 3, Ga 4).
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Affiliation(s)
- Juliane Schoening
- Institute for Inorganic Chemistry and Center forNanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstrasse 5–745117EssenGermany
| | - Alexander Gehlhaar
- Institute for Inorganic Chemistry and Center forNanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstrasse 5–745117EssenGermany
| | - Christoph Wölper
- Institute for Inorganic Chemistry and Center forNanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstrasse 5–745117EssenGermany
| | - Stephan Schulz
- Institute for Inorganic Chemistry and Center forNanointegration Duisburg-Essen (Cenide)University of Duisburg-EssenUniversitätsstrasse 5–745117EssenGermany
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196
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Ragan AN, Kraemer Y, Kong WY, Prasad S, Tantillo DJ, Pitts CR. Evidence for C–F Bond Formation through Formal Reductive Elimination from Tellurium(VI). Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208046] [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)
- Abbey N. Ragan
- University of California Davis Chemistry 1 Shields Avenue 95616 Davis UNITED STATES
| | - Yannick Kraemer
- University of California Davis Chemistry 1 Shields Avenue 95616 Davis UNITED STATES
| | - Wang-Yeuk Kong
- University of California Davis Chemistry 1 Shields Avenue 95616 Davis UNITED STATES
| | - Supreeth Prasad
- University of California Davis Chemistry 1 Shields Avenue 95616 Davis UNITED STATES
| | - Dean J. Tantillo
- University of California Davis Chemistry 1 Shields Avenue 95616 Davis UNITED STATES
| | - Cody Ross Pitts
- University of California Davis Department of Chemistry One Shields Avenue 95616 Davis UNITED STATES
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197
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Ragan AN, Kraemer Y, Kong WY, Prasad S, Tantillo DJ, Pitts CR. Evidence for C-F Bond Formation through Formal Reductive Elimination from Tellurium(VI). Angew Chem Int Ed Engl 2022; 61:e202208046. [PMID: 35859267 DOI: 10.1002/anie.202208046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Indexed: 11/10/2022]
Abstract
The fundamental challenge of C-F bond formation by reductive elimination has been met by compounds of select transition metals and fewer main group elements. The work detailed herein expands the list of main group elements known to be capable of reductively eliminating a C-F bond to include tellurium. Surprising and novel modes of both sp2 and sp3 C-F bond formation were observed alongside formation of TeIV cations during two separate attempts to synthesize/characterize fluorinated organotellurium(VI) cations in superacidic media (SbF5 /SO2 ClF). Following detailed low-temperature NMR experiments, the mechanisms of the two unique reductive elimination reactions were probed and investigated using density functional theory (DFT) calculations. Ultimately, we found that an "indirect" reductive elimination pathway is likely operative whereby Sb plays a key role in fluoride abstraction and C-F bond formation, as opposed to unimolecular reductive elimination from a discrete TeVI cation.
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Affiliation(s)
- Abbey N Ragan
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Yannick Kraemer
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Wang-Yeuk Kong
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Supreeth Prasad
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Dean J Tantillo
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Cody Ross Pitts
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
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198
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De S, Dutta S, Koley D. Theoretical Insights into Aluminum-Catalyzed Cyanosilylation of Aldehydes and Ketones. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sriman De
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741 246, India
| | - Sayan Dutta
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741 246, India
| | - Debasis Koley
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741 246, India
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199
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Sultana M, Bhattacharjee I, Bhunya S, Paul A. Uncovering the Synchronous Role of Bis‐borane with Nucleophilic Solvent as Frustrated Lewis pair in Metal‐free Catalytic Dehydrogenation of Ammonia‐borane. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Munia Sultana
- Indian Association for the Cultivation of Science School of Chemical Sciences INDIA
| | - Ishita Bhattacharjee
- Indian Association for the Cultivation of Science School of Chemical Sciences INDIA
| | - Sourav Bhunya
- Indian Association for the Cultivation of Science School of Chemical Sciences INDIA
| | - Ankan Paul
- Indian Association for the Cultivation of Science Raman Centre for Atomic, Molecular and Optical Sciences 2A and 2B, Raja S. C. Mullick RoadJadavpur 700032 Kolkata INDIA
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200
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Lai TY, Fettinger JC, Power PP. N–N Double-Bond Cleavage and Azobenzene Rearrangement with C–C Bond Formation Induced by a Germylene. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ting Yi Lai
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - James C. Fettinger
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
| | - Philip P. Power
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, United States
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