1
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Kong D, Li J, Dai W, Jiang L, Zhao Y, Zhu H, Fu G, Roesky HW. Geometrically Compelled Silicon(II)/Silicon(IV) Donor-Acceptor Interaction Enables the Enamination of Nitriles. Angew Chem Int Ed Engl 2023; 62:e202315249. [PMID: 37877345 DOI: 10.1002/anie.202315249] [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: 10/10/2023] [Revised: 10/24/2023] [Accepted: 10/24/2023] [Indexed: 10/26/2023]
Abstract
Discovering new bonding scenarios and subsequently exploring the reactivity contribute substantially to advance the main group element chemistry. Herein, we report on the isolation and characterization of an intriguing class of the hydrido-benzosiloles 2-4. These compounds exhibit a side arm of the amidinatosilylenyl group, featuring unidirectional silicon(II)/silicon(IV) donor-acceptor interaction on account of the geometric constraint. Furthermore, the reactions involving 2-4 with nitriles yield the tricyclic compounds that edge-fused of the Si-heteroimidazolidine-CN2 Si2 , silole-C4 Si, and phenyl-C6 -rings (5-13). These compounds are manifesting a unique reaction that the silicon(II)/silicon(IV) interaction enables the enamination of the α-H-bearing nitriles. The reaction mechanism involved in H-shift under oxidative addition at silylene followed by hydrosilylation of a ketenimine intermediate was revealed by density function theory (DFT) calculations.
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Affiliation(s)
- Deliang Kong
- State Key Laboratory of Physical Chemistry of Solid Surface, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Jiancheng Li
- State Key Laboratory of Physical Chemistry of Solid Surface, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Wen Dai
- State Key Laboratory of Physical Chemistry of Solid Surface, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Liuying Jiang
- State Key Laboratory of Physical Chemistry of Solid Surface, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Yiling Zhao
- State Key Laboratory of Physical Chemistry of Solid Surface, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Hongping Zhu
- State Key Laboratory of Physical Chemistry of Solid Surface, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Gang Fu
- State Key Laboratory of Physical Chemistry of Solid Surface, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005, China
| | - Herbert W Roesky
- Institüt für Anorganische Chemie, Universität Göttingen, Tammannstraße 4, 37077, Göttingen, Germany
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2
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Helmer J, Hepp A, Berger RJF, Lips F. Synthesis and functionalization of the six-vertex anionic amido-substituted silicon cluster [Si 6{N(SiMe 3)Ph} 5] . Dalton Trans 2023; 52:14949-14955. [PMID: 37800884 DOI: 10.1039/d2dt03952d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
The reaction of the six-vertex amido-substituted silicon cluster Si6{N(SiMe3)Ph}6 1 with two equiv. of KC8 results in the abstraction of K{N(SiMe3)Ph} and leads to the contact ion pair 2 including an anionic silicon cluster with two unsubstituted pyramidal vertices. Facile functionalization of 2 was achieved with MeI, SiCl4 and SiBr4 and results in neutral two-fold functionalized silicon clusters.
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Affiliation(s)
- Joschua Helmer
- Westfälische Wilhelms-Universität Münster, Institut für Anorganische und Analytische Chemie, Corrensstraße 28-30, 48149 Münster, Germany.
| | - Alexander Hepp
- Westfälische Wilhelms-Universität Münster, Institut für Anorganische und Analytische Chemie, Corrensstraße 28-30, 48149 Münster, Germany.
| | - Raphael J F Berger
- Paris Lodron Universität Salzburg, Materialchemie, Jakob-Harringerstr. 2a, 5020 Salzburg, Austria
| | - Felicitas Lips
- Westfälische Wilhelms-Universität Münster, Institut für Anorganische und Analytische Chemie, Corrensstraße 28-30, 48149 Münster, Germany.
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3
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Li Y, Dong S, Guo J, Ding Y, Zhang J, Zhu J, Cui C. π-Aromaticity Dominating in a Saturated Ring: Neutral Aromatic Silicon Analogues of Cyclobutane-1,3-diyls. J Am Chem Soc 2023; 145:21159-21164. [PMID: 37724997 DOI: 10.1021/jacs.3c06555] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
The synthesis, structures, and reactivity of the first neutral 2π-aromatic Si4 rings [LSiSiAr(X)]2 (3: X = Br; 4: X = Cl; L = PhC(NtBu)2, Ar = 2,4,6-Me3C6H2) were described. Compounds 3 and 4 were obtained by 1,3-halogenation of tetrasilacyclobutadiene (LSiSiAr)2 (2), which was prepared by the reductive cross-coupling of trisilane (ArSiCl2)2SiHAr with two equiv of chlorosilylene LSiCl. The reaction of 3 with two equiv of PhLi yielded the corresponding substitution Si4 ring [LSiSiAr(Ph)]2 (5). Single-crystal X-ray diffraction analysis of 3 disclosed that it adopts both puckered (3a) and planar (3b) structures in the solid state, whereas 4 and 5 exhibit only a puckered structure. DFT calculations suggested that the puckered 3a features almost the same electronic structure with fully delocalized 2π planar 3b. The dominant 2π-aromaticity of 3 in a σ-frame has been demonstrated by DFT calculations, providing the first example of aromatics featuring both planar and puckered structures.
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Affiliation(s)
- Yang Li
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Shicheng Dong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Junjie Guo
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Yazhou Ding
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Jianying Zhang
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Jun Zhu
- Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, China
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Chunming Cui
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
- Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, People's Republic of China
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4
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Coburger P, Schweinzer C, Li Z, Grützmacher H. Reversible Single Electron Redox Steps Convert Polycycles with a C 3 P 3 Core to a Planar Triphosphinine. Angew Chem Int Ed Engl 2023; 62:e202214548. [PMID: 36688727 DOI: 10.1002/anie.202214548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/18/2022] [Accepted: 01/23/2023] [Indexed: 01/24/2023]
Abstract
Reaction of the imidazolium-stabilized diphosphete-diide IDP with trityl phosphaalkyne affords a mixture which contains the molecules 1 a and 1 b with a central C3 P3 core, which formally carries a two-fold negative charge. In order to avoid the formation of an antiaromatic 8π electron system within a conjugated dianionic six-membered [C3 P3 ]2- ring, 1 a adopts a bicyclic [3.1.0] and 1 b a tricyclic [2.2.0.0] structure which are in a dynamic equilibrium. 1 a, b can be reversibly oxidized to a triphosphinine dication [5]2+ with a central flat aromatic six-membered C3 P3 ring. This two-electron redox reaction occurs in two single-electron transfer steps via the 7π-radical cation [4]⋅+ , which could also be isolated and fully characterized. The profound reversible structural change observed for the two-electron redox couple [5]2+ /1 a, b is in sharp contrast to the C6 H6 /[C6 H6 ]2- couple, which undergoes only a modest structural deformation.
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Affiliation(s)
- Peter Coburger
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093, Zürich, Switzerland
| | - Clara Schweinzer
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093, Zürich, Switzerland
| | - Zhongshu Li
- Lehn Institute of Functional Materials (LIFM), School of Chemistry, Sun Yat-Sen University, 510275, Guangzhou, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 30071, Tianjin, China
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, 8093, Zürich, Switzerland
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5
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Wakchaure PD, Ganguly B. Metal ion-decorated hexasilaprismane and its derivative as a molecular container for the separation of CO 2 from flue gas molecules: a computational study. Dalton Trans 2023; 52:4336-4348. [PMID: 36912042 DOI: 10.1039/d3dt00208j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The electronic structure of hexasilaprismane (HSP) was examined with different computational techniques to elucidate the bonding features and the electrostatic surface potential of HSP. The carbon dioxide adsorption and separation capacities of metal-ion-decorated hexasilaprismane (HSP) were examined with DFT and CBS-QB3. Furthermore, the 1,2,3,4,5,6-hexaphenylprismasilane (HPPS) molecule was examined for its binding with metal ions and gas adsorption capacity. The Mg2+ ion complexed HPPS molecule adsorbs 15CO2 molecules with an average binding free energy of -0.98 eV per molecule. The calculated gravimetric densities of 45.1 and 48.4 wt% show that these systems can be employed for CO2 capture. The substantial difference in the affinity of the designed systems for CO2 gas molecules compared to N2 and CH4 molecules show the potential of the systems for CO2 separation from N2 and CH4 gas molecules.
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Affiliation(s)
- Padmaja D Wakchaure
- Computation and Simulation Unit (Analytical and Environmental Science Division and Centralized Instrument Facility), CSIR - Central Salt and Marine Chemicals Research Institute, Bhavnagar-364002, Gujarat, India. .,Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh-201002, India
| | - Bishwajit Ganguly
- Computation and Simulation Unit (Analytical and Environmental Science Division and Centralized Instrument Facility), CSIR - Central Salt and Marine Chemicals Research Institute, Bhavnagar-364002, Gujarat, India. .,Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh-201002, India
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6
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Li Y, Cui C. Synthesis of Phosphine-Functionalized Silicon Cubane and Its Oxidative Addition, Giving a Bis(silyl)copper Complex. Inorg Chem 2023; 62:2503-2507. [PMID: 36709431 DOI: 10.1021/acs.inorgchem.2c03937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A new strategy for the introduction of a second type of Si atom to silicon cubanes has been developed starting from the tricyclic hexasilane dianion [Ar6Si6]2- (Ar = 2,4,6-Me3C6H2). Treatment of the dianion with Ar'SiCl3, followed by KC8, gave new types of octasilacubanes Ar6Ar'2Si8 [Ar' = 2,4,6-iPr2C6H2 (3a), 2-Ph2PC6H4 (3b)] in high yields. Remarkably, treatment of cubane 3b bearing with two phosphine groups with 2 equiv of CuCl in CH2Cl2 yielded the bis(silyl)copper complex via the selective oxidative addition of the newly formed Si-Si bond to Cu ion. Single-crystal X-ray analysis indicated the unique square-planar, four-coordinate Cu cation paired with the [CuCl2]- counteranion.
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Affiliation(s)
- Yang Li
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Chunming Cui
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
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7
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Dabringhaus P, Zedlitz S, Giarrana L, Scheschkewitz D, Krossing I. Low-Valent M x Al 3 Cluster Salts with Tetrahedral [SiAl 3 ] + and Trigonal-Bipyramidal [M 2 Al 3 ] 2+ Cores (M=Si/Ge). Angew Chem Int Ed Engl 2023; 62:e202215170. [PMID: 36479813 PMCID: PMC10108233 DOI: 10.1002/anie.202215170] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 12/06/2022] [Accepted: 12/06/2022] [Indexed: 12/12/2022]
Abstract
Schnöckel's [(AlCp*)4 ] and Jutzi's [SiCp*][B(C6 F5 )4 ] (Cp*=C5 Me5 ) are landmarks in modern main-group chemistry with diverse applications in synthesis and catalysis. Despite the isoelectronic relationship between the AlCp* and the [SiCp*]+ fragments, their mutual reactivity is hitherto unknown. Here, we report on their reaction giving the complex salts [Cp*Si(AlCp*)3 ][WCA] ([WCA]- =[Al(ORF )4 ]- and [F{Al(ORF )3 }2 ]- ; RF =C(CF3 )3 ). The tetrahedral [SiAl3 ]+ core not only represents a rare example of a low-valent silicon-doped aluminium-cluster, but also-due to its facile accessibility and high stability-provides a convenient preparative entry towards low-valent Si-Al clusters in general. For example, an elusive binuclear [Si2 (AlCp*)5 ]2+ with extremely short Al-Si bonds and a high negative partial charge at the Si atoms was structurally characterised and its bonding situation analysed by DFT. Crystals of the isostructural [Ge2 (AlCp*)5 ]2+ dication were also obtained and represent the first mixed Al-Ge cluster.
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Affiliation(s)
- Philipp Dabringhaus
- Albert-Ludwigs-Universität Freiburg, Institute for Inorganic and Analytical Chemistry, Freiburg Materials Research Center FMF, Albertstraße 21, 79104, Freiburg i. Br., Germany
| | - Silja Zedlitz
- Albert-Ludwigs-Universität Freiburg, Institute for Inorganic and Analytical Chemistry, Freiburg Materials Research Center FMF, Albertstraße 21, 79104, Freiburg i. Br., Germany
| | - Luisa Giarrana
- Chair in General and Inorganic Chemistry, Saarland University, 66123, Saarbrücken, Germany
| | - David Scheschkewitz
- Chair in General and Inorganic Chemistry, Saarland University, 66123, Saarbrücken, Germany
| | - Ingo Krossing
- Albert-Ludwigs-Universität Freiburg, Institute for Inorganic and Analytical Chemistry, Freiburg Materials Research Center FMF, Albertstraße 21, 79104, Freiburg i. Br., Germany
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8
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Keuter J, Dimitrova M, Janka O, Hepp A, Berger RJF, Lips F. An Anionic Amido-Substituted Seven-Vertex Siliconoid Cluster. Chemistry 2022; 28:e202201473. [PMID: 35652723 PMCID: PMC9543723 DOI: 10.1002/chem.202201473] [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: 05/12/2022] [Indexed: 11/09/2022]
Abstract
The silanide [Si4 {N(SiMe3 )Dipp}3 ]- (1) transforms into the anionic siliconoid cluster [Si7 {N(SiMe3 )Dipp}3 ]- (2) with four unsubstituted silicon atoms as a contact ion pair with [K([18]crown-6)] in C6 D6 at room temperature within five weeks. Anion 2 was investigated by natural population analysis and visualization of intrinsic atomic orbitals. Magnetically induced current-density calculations of 2 revealed two distinct strong diatropic vortices that sum up in one direction and create a strongly shielded apical silicon atom in 2.
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Affiliation(s)
- Jan Keuter
- Westfälische Wilhelms-Universität MünsterInstitut für Anorganische und Analytische ChemieCorrensstraße 28–3048149MünsterGermany
| | - Maria Dimitrova
- Paris-Lodron Universität SalzburgMaterialchemieJakob-Harringerstr. 2a5020SalzburgAustria
| | - Oliver Janka
- Westfälische Wilhelms-Universität MünsterInstitut für Anorganische und Analytische ChemieCorrensstraße 28–3048149MünsterGermany
| | - Alexander Hepp
- Westfälische Wilhelms-Universität MünsterInstitut für Anorganische und Analytische ChemieCorrensstraße 28–3048149MünsterGermany
| | - Raphael J. F. Berger
- Paris-Lodron Universität SalzburgMaterialchemieJakob-Harringerstr. 2a5020SalzburgAustria
| | - Felicitas Lips
- Westfälische Wilhelms-Universität MünsterInstitut für Anorganische und Analytische ChemieCorrensstraße 28–3048149MünsterGermany
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9
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Preißing L, Behling E, Schnepf A. GeCl x[Co(CO) 3PR 3] 4-x (x = 0-3; R = nPr, nBu): from cobalt substituted germanes to novel binary cluster compounds. Dalton Trans 2021; 50:10789-10797. [PMID: 34286780 DOI: 10.1039/d1dt02016a] [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
The synthesis of a variety of cobalt substituted germanes of the composition GeClx[Co(CO)3PR3]4-x (x = 0-3; R = nPr, nBu) is presented, which can be obtained in average to good yields from a reaction of GeCl2·dioxane and Co2(CO)8 or KCo(CO)4 in the presence of the respective phosphine. Reductive coupling reactions with potassium/benzophenone lead to ligand scrambling while the reductive coupling with Mg/MgBr2 leads to the pseudo-cubic cluster compound Ge7Co(CO)3[Co(CO)3PnBu3]72, showing that the mixed substituted germanes are powerful precursors to this new class of cluster compounds. All compounds are structurally characterized and well observable via NMR and IR spectroscopy.
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Affiliation(s)
- Lars Preißing
- Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany.
| | - Elias Behling
- Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany.
| | - Andreas Schnepf
- Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany.
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10
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Abstract
The continuously decreasing size of device features in microelectronics draws growing attention to the structuring of silicon at the molecular level with powerful tools provided by synthetic chemistry. Silicon clusters are of particular importance in this regard not only as potential precursors for silicon deposition but also as well-defined model systems for bulk and surfaces of silicon at the nanoscale as well as possible starting points for future construction of molecularly precise device structures. This review aims to give a comprehensive overview about the state of the art in the synthesis of molecular silicon clusters, which are grouped into (1) electron-precise saturated clusters, (2) soluble polyhedral Zintl anions, and (3) unsaturated silicon clusters, the so-called siliconoids. Particular attention is paid to functionalization as it is generally considered a necessary prerequisite for the design and construction of more extended systems. The interrelations between the three different classes of molecular silicon clusters, e.g., arising from the introduction of negatively charged functional groups, are highlighted on grounds of NMR properties and computed electronic structures.
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Affiliation(s)
- Yannic Heider
- Chair of General and Inorganic Chemistry, Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
| | - David Scheschkewitz
- Chair of General and Inorganic Chemistry, Department of Chemistry, Saarland University, 66123 Saarbrücken, Germany
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11
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Lin Q, Lin Z, Pan M, Zheng Q, Li H, Chen X, Darcel C, Dixneuf PH, Li B. Alkenes as hydrogen trappers to control the regio-selective ruthenium(ii) catalyzed ortho C–H silylation of amides and anilides. Org Chem Front 2021. [DOI: 10.1039/d0qo01031f] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A convenient and practical pathway to versatile silylated amides and anilides is described via efficient and selective ruthenium(ii) catalyzed ortho C–H silylation with different alkenes as the hydrogen acceptors.
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Affiliation(s)
- Qiao Lin
- School of Biotechnology and Health Sciences
- Wuyi University
- Jiangmen 529020
- P.R. China
| | - Zirui Lin
- School of Biotechnology and Health Sciences
- Wuyi University
- Jiangmen 529020
- P.R. China
| | - Mingxing Pan
- School of Biotechnology and Health Sciences
- Wuyi University
- Jiangmen 529020
- P.R. China
| | - Qiaojin Zheng
- School of Biotechnology and Health Sciences
- Wuyi University
- Jiangmen 529020
- P.R. China
| | - Hui Li
- School of Biotechnology and Health Sciences
- Wuyi University
- Jiangmen 529020
- P.R. China
| | - Xiuwen Chen
- School of Biotechnology and Health Sciences
- Wuyi University
- Jiangmen 529020
- P.R. China
| | - Christophe Darcel
- Univ. Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes)
- F-35000 Rennes
- France
| | - Pierre H. Dixneuf
- Univ. Rennes
- CNRS
- ISCR (Institut des Sciences Chimiques de Rennes)
- F-35000 Rennes
- France
| | - Bin Li
- School of Biotechnology and Health Sciences
- Wuyi University
- Jiangmen 529020
- P.R. China
- Univ. Rennes
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12
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Ota K, Kinjo R. Inorganic Benzene Valence Isomers. Chem Asian J 2020; 15:2558-2574. [DOI: 10.1002/asia.202000535] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/03/2020] [Indexed: 01/07/2023]
Affiliation(s)
- Kei Ota
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Nanyang Link 21 Singapore 637371 Singapore
| | - Rei Kinjo
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Nanyang Link 21 Singapore 637371 Singapore
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13
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Ma M, Shen L, Wang H, Zhao Y, Wu B, Yang XJ. N,N′-Dipp-o-phenylene-diamido Dianion: A Versatile Ligand for Main Group Metal–Metal-Bonded Compounds. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00136] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Meimei Ma
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, China
| | - Lingyi Shen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, China
| | - Huanhuan Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, China
| | - Yanxia Zhao
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, China
| | - Biao Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, China
| | - Xiao-Juan Yang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi’an 710127, China
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14
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Liu Z, Zhang J, Yang H, Cui C. Synthesis of Boryl-Substituted Disilane, Disilene, and Silyl Cation. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00148] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhaocai Liu
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Jianying Zhang
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Hao Yang
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
| | - Chunming Cui
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People’s Republic of China
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15
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Tian M, Zhang J, Yang H, Cui C. Isolation of a 1-Magnesium-2,3-disilacyclopropene and a Related Bis(disilenide). J Am Chem Soc 2020; 142:4131-4135. [PMID: 32066239 DOI: 10.1021/jacs.0c00519] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein we report the first synthesis of a 1-magnesium-2,3-disilacyclopropene and a related bis(disilenide). Reduction of (boryl)tribromosilane (1, boryl = (HCArN)2B, Ar = 2,6-iPr2C6H3) with magnesium in THF afforded boryl-substituted magnesium complex [(boryl)Si]2Mg(THF)3 (2) in good yield, whereas reduction of (boryl)trichlorosilane (3) with KC8 in THF led to the isolation of bridged alkoxy alkyl bis(disilenide) (THF)K(boryl)Si═Si(boryl)O(CH2)4(boryl)Si═Si(boryl)K(THF) (4) via ring opening of a THF molecule. X-ray diffraction analysis of 2 confirmed the presence of the novel Si2Mg three-membered ring as well as the Si═Si double bond, which existed in a noticeably twisted B-Si-Si-B array. Complex 2 also represents the first reported example of a stable disilyne dianion.
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Affiliation(s)
- Miao Tian
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Jianying Zhang
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Hao Yang
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
| | - Chunming Cui
- State Key Laboratory of Elemento-Organic Chemistry and College of Chemistry, Nankai University, Tianjin 300071, People's Republic of China
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16
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Preißing L, Schrenk C, Schnepf A. On the reaction of GeCl 2·dioxane with KFeCp(CO) 2: isolation and characterization of novel bimetallic clusters. Dalton Trans 2019; 48:3831-3834. [PMID: 30806441 DOI: 10.1039/c9dt00097f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The reaction of GeCl2·dioxane with KFeCp(CO)2 gives the polyhedral cluster compounds Ge6[FeCp(CO)2]61, Ge6[FeCp(CO)2]6Cl23 and Ge6[FeCp(CO)2]4[Fe2Cp2(CO)3]25. Quantum chemical calculations indicate that the substitution of a halide substituent in GeCl2 by FeCp(CO)2 favours the formation of oligomers with Ge-Ge bonds, giving access to polyhedral cluster compounds from easily accessible starting materials.
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Affiliation(s)
- Lars Preißing
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany.
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17
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Yañez O, Garcia V, Garza J, Orellana W, Vásquez‐Espinal A, Tiznado W. (Li
6
Si
5
)
2–5
: The Smallest Cluster‐Assembled Materials Based on Aromatic Si
5
6−
Rings. Chemistry 2019; 25:2467-2471. [DOI: 10.1002/chem.201805677] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Osvaldo Yañez
- Departamento de Ciencias QuímicasFacultad de Ciencias ExactasComputational and Theoretical Chemistry GroupUniversidad Andres Bello Av. República 275 8370146 Santiago Chile
| | - Victor Garcia
- Doctorado en Fisicoquímica MolecularFacultad de Ciencias ExactasUniversidad Andres Bello Av. República 275 8370146 Santiago Chile
| | - Jorge Garza
- Departamento de QuímicaDivisión de Ciencias Básicas e IngenieríasUniversidad Autónoma Metropolitana-Iztapalapa San Rafael Atlixco 186, Col Vicentina, Iztapalapa 09340 Mexico City Mexico
| | - Walter Orellana
- Departamento de Ciencias FísicasFacultad de Ciencias ExactasUniversidad Andres Bello Av. Sazié 2212 8370146 Santiago Chile
| | - Alejandro Vásquez‐Espinal
- Departamento de Ciencias QuímicasFacultad de Ciencias ExactasComputational and Theoretical Chemistry GroupUniversidad Andres Bello Av. República 275 8370146 Santiago Chile
| | - William Tiznado
- Departamento de Ciencias QuímicasFacultad de Ciencias ExactasComputational and Theoretical Chemistry GroupUniversidad Andres Bello Av. República 275 8370146 Santiago Chile
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18
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Li H, Garner MH, Shangguan Z, Chen Y, Zheng Q, Su TA, Neupane M, Liu T, Steigerwald ML, Ng F, Nuckolls C, Xiao S, Solomon GC, Venkataraman L. Large Variations in the Single-Molecule Conductance of Cyclic and Bicyclic Silanes. J Am Chem Soc 2018; 140:15080-15088. [DOI: 10.1021/jacs.8b10296] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
| | - Marc H. Garner
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - Zhichun Shangguan
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Optoelectronic Nano Materials and Devices Institute, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | - Yan Chen
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Optoelectronic Nano Materials and Devices Institute, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | - Qianwen Zheng
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Optoelectronic Nano Materials and Devices Institute, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | | | | | - Taifeng Liu
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Optoelectronic Nano Materials and Devices Institute, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | | | | | | | - Shengxiong Xiao
- The Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, Optoelectronic Nano Materials and Devices Institute, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China
| | - Gemma C. Solomon
- Nano-Science Center and Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
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19
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Abstract
Molecular silicon clusters with unsubstituted silicon vertices (siliconoids) have received attention as unsaturated silicon clusters and potential intermediates in the gas-phase deposition of elemental silicon. Investigation of behaviors of the siliconoids could contribute to the greater understanding of the transformation of silicon clusters as found in the chemical vapor deposition of elemental silicon. Herein we reported drastic transformation of a Si8R8 siliconoid to three novel silicon clusters under mild thermal conditions. Molecular structures of the obtained new clusters were determined by XRD analyses. Two clusters are siliconoids that have unsaturated silicon vertices adopting unusual geometries, and another one is a bis(disilene) which has two silicon–silicon double bonds interacted to each other through the central polyhedral silicon skeleton. The observed drastic transformation of silicon frameworks suggests that unsaturated molecular silicon clusters have a great potential to provide various molecular silicon clusters bearing unprecedented structures and properties.
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20
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Sumiya Y, Maeda S. Designing the Backbone of Hexasilabenzene Derivatives with a High Unimolecular Kinetic Stability. Chemistry 2018; 24:12264-12268. [PMID: 29663547 DOI: 10.1002/chem.201801699] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Indexed: 11/10/2022]
Abstract
It is an important subject to theoretically predict the kinetic stability of transient species. In this study, we have studied the kinetic stability of hexasilabenzene Si6 H6 and its derivatives, that is, decasilanaphthalene Si10 H8 and Li-substituted hexasilabenzene Si6 Li6 , theoretically by the artificial force induced reaction (AFIR) method combined with the rate constant matrix contraction (RCMC) method. Molecular design was further conducted to extend the unimolecular lifetime of hexasilabenzene derivatives. Although both Si10 H8 and Si6 Li6 were shown to possess shorter lifetimes than Si6 H6 , we found that the lifetimes of Si6 Li6 changed depending on arrangements of Li atoms around the monocyclic Si6 backbone. Based on this knowledge, we found that a compound of an atomic composition Si6 H4 Li2 with a planar, monocyclic Si6 backbone has a relatively long unimolecular lifetime. Moreover, substitution of the two Li atoms by Na atoms further increased the lifetime.
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Affiliation(s)
- Yosuke Sumiya
- Graduate School of Chemical, Sciences and Engineering, Hokkaido University, Sapporo, 060-8628, Japan
| | - Satoshi Maeda
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan.,Research and Services Division of Materials Data and Integrated System (MaDIS), National Institute for Materials Science (NIMS), Tsukuba, 305-0044, Japan
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21
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Xie W, Park SW, Jung H, Kim D, Baik MH, Chang S. Conjugate Addition of Perfluoroarenes to α,β-Unsaturated Carbonyls Enabled by an Alkoxide-Hydrosilane System: Implication of a Radical Pathway. J Am Chem Soc 2018; 140:9659-9668. [PMID: 29990423 DOI: 10.1021/jacs.8b05744] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Conjugate addition of organometallic reagents to α,β-unsaturated carbonyls is a key strategy for the construction of carbon-carbon bond in organic synthesis. Although direct C-H addition to unsaturated bonds via transition metal catalysis is explored in recent years, electron-deficient arenes that do not bear directing groups continue to be challenging. Herein we disclose the first example of a conjugate addition of perfluoroarenes to α,β-unsaturated carbonyls enabled by an alkoxide-hydrosilane system. The reaction is convenient to carry out at room temperature over a broad range of substrates and reactants to furnish synthetically versatile products in high to excellent yields. Mechanistic experiments in combination with computational studies suggest that a radical pathway is most likely operative in this transformation. The hypervalent silicate and silanide species, which are relevant to the proposed mechanism, were observed experimentally by NMR and single crystal X-ray diffraction analyses.
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Affiliation(s)
- Weilong Xie
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
| | - Sung-Woo Park
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
| | - Hoimin Jung
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
| | - Dongwook Kim
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
| | - Mu-Hyun Baik
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Republic of Korea.,Department of Chemistry , Korea Advanced Institute of Science & Technology (KAIST) , Daejeon 34141 , Republic of Korea
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