1
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Obi AD, Freeman LA, Coates SJ, Alexis AJH, Frey NC, Dickie DA, Webster CE, Gilliard RJ. Carbene–Calcium Silylamides and Amidoboranes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Akachukwu D. Obi
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Lucas A. Freeman
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Samuel J. Coates
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Andrew J. H. Alexis
- Department of Chemistry, University of Virginia, 409 McCormick Road, P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Nathan C. Frey
- 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
| | - Charles Edwin Webster
- Department of Chemistry, Mississippi State University, Box 9573, Mississippi State, Mississippi 39762, United States
| | - 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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2
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Wirtz L, Ghulam KY, Morgenstern B, Schäfer A. Constrained Geometry
ansa
‐Half‐Sandwich Complexes of Magnesium – Versatile
s
‐Block Catalysts. ChemCatChem 2022. [DOI: 10.1002/cctc.202201007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lisa Wirtz
- Faculty of Natural Science and Technology Department of Chemistry Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
| | - Kinza Yasmin Ghulam
- Faculty of Natural Science and Technology Department of Chemistry Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
| | - Bernd Morgenstern
- Faculty of Natural Science and Technology Department of Chemistry Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
| | - André Schäfer
- Faculty of Natural Science and Technology Department of Chemistry Saarland University Campus Saarbrücken 66123 Saarbrücken Germany
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3
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Lorber C, Panda TK, Banerjee I, Sagar S. Catalytic addition reactions of amines, thiols, and diphenyl‐phosphine oxides to heterocumulenes using a bridging Sulfonylimido titanium(IV) complex. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200188] [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)
- Christian Lorber
- CNRS Labo de Chimie de Coordination 205 route de Narbonne 31077 Toulouse FRANCE
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4
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Zhao Y, Ma X, Yan B, Ni C, He X, Peng Y, Yang Z. A novel case of atom-efficient C-C bond formation of small molecules catalyzed by the facile organoaluminum compound. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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5
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Goswami B, Feuerstein TJ, Yadav R, Köppe R, Lebedkin S, Kappes MM, Roesky PW. Enantiopure Calcium Iminophosphonamide Complexes: Synthesis, Photoluminescence, and Catalysis. Chemistry 2021; 27:4401-4411. [PMID: 33355402 PMCID: PMC7986735 DOI: 10.1002/chem.202004833] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/21/2020] [Indexed: 11/09/2022]
Abstract
The synthesis of calcium complexes ligated by three different chiral iminophosphonamide ligands, L-H (L=[Ph2 P{N(R)CH(CH3 )Ph}2 ]), L'-H (L'=[Ph2 P{NDipp}{N(R)CH(CH3 )Ph}]), (Dipp=2,6-i Pr2 C6 H3 ), and L''-H (L''=[Ph2 P{N(R)CH(CH3 )naph}2 ]), (naph=naphthyl) is presented. The resulting structures [L2 Ca], [L'2 Ca], and [L''2 Ca] represent the first examples of enantiopure homoleptic calcium complexes based on this type of ligands. The calcium complexes show blue-green photoluminescence (PL) in the solid state, which is especially bright at low temperatures. Whereas the emission of [L''2 Ca] is assigned to the fluorescence of naphthyl groups, the PL of [L2 Ca] and [L'2 Ca] is contributed by long-lived phosphorescence and thermally activated delayed fluorescence (TADF), with a strong variation of the PL lifetimes over the temperature range of 5-295 K. Furthermore, an excellent catalytic activity was found for these complexes in hydroboration of ketones at room temperature, although no enantioselectivity was achieved.
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Affiliation(s)
- Bhupendra Goswami
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131, Karlsruhe, Germany
| | - Thomas J Feuerstein
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131, Karlsruhe, Germany
| | - Ravi Yadav
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131, Karlsruhe, Germany
| | - Ralf Köppe
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131, Karlsruhe, Germany
| | - Sergei Lebedkin
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Manfred M Kappes
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany.,Institute of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber Weg 2, 76131, Karlsruhe, Germany
| | - Peter W Roesky
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131, Karlsruhe, Germany
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6
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Li Y, Chen H, Qu L, Bai R, Lan Y. Geometry, stability and aromaticity of β-diketiminate-coordinated alkaline-earth compounds. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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7
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Robertson SD, Uzelac M, Mulvey RE. Alkali-Metal-Mediated Synergistic Effects in Polar Main Group Organometallic Chemistry. Chem Rev 2019; 119:8332-8405. [DOI: 10.1021/acs.chemrev.9b00047] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Stuart D. Robertson
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | - Marina Uzelac
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | - Robert E. Mulvey
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
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8
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Cui CX, Xu D, Ding BW, Qu LB, Zhang YP, Lan Y. Benchmark study of popular density functionals for calculating binding energies of three-center two-electron bonds. J Comput Chem 2019; 40:657-670. [PMID: 30565268 DOI: 10.1002/jcc.25752] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/19/2018] [Accepted: 10/20/2018] [Indexed: 12/13/2022]
Abstract
Density functional theory (DFT) can be used to study the three-center two-electron (3c2e) bonding mode, which is universal in catalysts containing alkaline-earth (Ae) and boron-group (Bg) elements. However, because of the delocalization pattern of the 3c2e bond, the wavefunction cannot be accurately described by DFT methods. The calculated energies of Ae and Bg catalysts therefore fluctuate greatly when different functionals are used, largely because of inconsistent DFT-calculated binding energies of 3c2e bonds. Nevertheless, with the development of supercomputers and theoretical calculation software, the DFT method is becoming increasingly popular for studying Ae and Bg catalysts. In this study, we compared the performances of 21 functionals with the high-level composite G3B3 method in calculations for the binding energies of 3c2e bonds. Several frequently used post-Hartree-Fock methods were also tested. The calculation results indicate that the M06-2X, MN12-L, and MN15 functionals give consistent and reliable binding energies for common 3c2e bonds. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Cheng-Xing Cui
- Postdoctoral Station of Food Science and Engineering, College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China.,Postdoctoral Research Base, School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, People's Republic of China
| | - Dongdong Xu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, People's Republic of China
| | - Bo-Wen Ding
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, People's Republic of China
| | - Ling-Bo Qu
- Postdoctoral Station of Food Science and Engineering, College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, People's Republic of China.,College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Yu-Ping Zhang
- Postdoctoral Research Base, School of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453003, People's Republic of China
| | - Yu Lan
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, People's Republic of China.,College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
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9
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Feng Z, Huang Z, Wang S, Wei Y, Zhou S, Zhu X. Synthesis and characterization of 2-t-butylimino-functionalized indolyl rare-earth metal amido complexes for the catalytic addition of terminal alkynes to carbodiimides: the dimeric complexes with the alkynide species in the μ–η1:η2 bonding modes. Dalton Trans 2019; 48:11094-11102. [DOI: 10.1039/c9dt01582e] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dimeric complexes [(μ–η1:η2-RCC)REL2]2 (L = 2-(tBuNCH)C8H5N), with alkynyl in the μ–η1:η2 modes, were isolated in the study of the catalytic reaction.
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Affiliation(s)
- Zhijun Feng
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Zeming Huang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Shaowu Wang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Yun Wei
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Shuangliu Zhou
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Xiancui Zhu
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- College of Chemistry and Materials Science
- Anhui Normal University
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10
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Krieck S, Kalden D, Oberheide A, Seyfarth L, Arndt HD, Görls H, Westerhausen M. Synthesis and catalytic activity of tridentate N-(2-pyridylethyl)-substituted bulky amidinates of calcium and strontium. Dalton Trans 2019; 48:2479-2490. [DOI: 10.1039/c8dt04905j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sterically protected tridentate amidinates of calcium have been prepared to study the intramolecular hydroamination of an aminoalkene.
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Affiliation(s)
- Sven Krieck
- Institute of Inorganic and Analytical Chemistry
- Friedrich Schiller University
- 07743 Jena
- Germany
| | - Diana Kalden
- Institute of Inorganic and Analytical Chemistry
- Friedrich Schiller University
- 07743 Jena
- Germany
| | - Ansgar Oberheide
- Institute of Organic Chemistry and Macromolecular Chemistry
- Friedrich Schiller University
- 07743 Jena
- Germany
| | - Lydia Seyfarth
- Institute of Organic Chemistry and Macromolecular Chemistry
- Friedrich Schiller University
- 07743 Jena
- Germany
| | - Hans-Dieter Arndt
- Institute of Organic Chemistry and Macromolecular Chemistry
- Friedrich Schiller University
- 07743 Jena
- Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry
- Friedrich Schiller University
- 07743 Jena
- Germany
| | - Matthias Westerhausen
- Institute of Inorganic and Analytical Chemistry
- Friedrich Schiller University
- 07743 Jena
- Germany
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11
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Dyall J, Hill MS, Mahon MF, Teh L, Wilson ASS. Calcium formamidinate derivatives by hydride insertion of carbodiimides. Dalton Trans 2019; 48:4248-4254. [DOI: 10.1039/c8dt05107k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Insertion reactions of N,N′-dialkyl and N,N′-diaryl carbodiimides with a dimeric calcium hydride provide formamidinate derivatives whose structures on the steric demands of the carbodiimide reagent.
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Affiliation(s)
| | | | | | - Luke Teh
- Department of Chemistry
- University of Bath
- Bath
- UK
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12
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Bhattacharjee J, Harinath A, Banerjee I, Nayek HP, Panda TK. Highly Active Dinuclear Titanium(IV) Complexes for the Catalytic Formation of a Carbon-Heteroatom Bond. Inorg Chem 2018; 57:12610-12623. [PMID: 30259733 DOI: 10.1021/acs.inorgchem.8b01766] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of mononuclear titanium(IV) complexes with the general composition κ3-[R{NHPh2P(X)}2Ti(NMe2)2] [R = C6H4, X = Se (3b); R = trans-C6H10, X = S (4a), Se (4b)] and [{κ2-N(PPh2Se)2}2Ti(NMe2)2] (6b) and two dinuclear titanium(IV) complexes, [C6H4{(NPh2PS)(N)}Ti(NMe2)]2 (3c) and [{κ2-N(PPh2Se)}Ti(NMe2)2]2 (6c), are reported. Dinuclear titanium(IV) complex 6c acts as an efficient catalyst for the chemoselective addition of an E-H bond (E = N, O, S, P, C) to heterocumulenes under mild conditions. The catalytic addition of aliphatic and aromatic amines, alcohol, thiol, phosphine oxide, and acetylene to the carbodiimides afforded the corresponding hydroelemented products in high yield at mild conditions with a broader substrate scope. The catalytic efficiency of the dinuclear complex depends on the cooperative effect of the TiIV ions, the systematic variation of the intermetallic distance, and the ligand's steric properties of the complex, which enhances the reaction rate. Most interestingly, this is the first example of catalytic insertion of various E-H bonds into the carbodiimides using a single-site catalyst because only the titanium-mediated insertion of E-H into a C═N unsaturated bond is reported to date. The amine and alcohol insertion reaction with the carbodiimides showed first-order kinetics with respect to the titanium(IV) catalyst as well as substrates. A most plausible mechanism for hydroelementation reaction is also proposed, based on the spectroscopic data of the controlled reaction, a time-course study, and the Hammett plot.
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Affiliation(s)
- Jayeeta Bhattacharjee
- Department of Chemistry , Indian Institute of Technology Hyderabad Kandi , Sangareddy , Telangana 502 285 , India
| | - Adimulam Harinath
- Department of Chemistry , Indian Institute of Technology Hyderabad Kandi , Sangareddy , Telangana 502 285 , India
| | - Indrani Banerjee
- Department of Chemistry , Indian Institute of Technology Hyderabad Kandi , Sangareddy , Telangana 502 285 , India
| | - Hari Pada Nayek
- Department of Applied Chemistry , Indian Institute of Technology Dhanbad , Dhanbad , Jharkhand 826004 , India
| | - Tarun K Panda
- Department of Chemistry , Indian Institute of Technology Hyderabad Kandi , Sangareddy , Telangana 502 285 , India
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13
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Wang H, Guo Z, Tong H, Zhou M. Synthesis, structures of mononuclear and dinuclear iron(II) complexes supported by non-symmetric guanidinate(amidinate) ligands. Polyhedron 2018. [DOI: 10.1016/j.poly.2017.11.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Freitag B, Pahl J, Färber C, Harder S. Syntheses of Heteroleptic Amidinate Strontium Complexes Using a Superbulky Ligand. Organometallics 2018. [DOI: 10.1021/acs.organomet.7b00871] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Benjamin Freitag
- Inorganic and Organometallic
Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraβe 1, 91058 Erlangen, Germany
| | - Jürgen Pahl
- Inorganic and Organometallic
Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraβe 1, 91058 Erlangen, Germany
| | - Christian Färber
- Inorganic and Organometallic
Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraβe 1, 91058 Erlangen, Germany
| | - Sjoerd Harder
- Inorganic and Organometallic
Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraβe 1, 91058 Erlangen, Germany
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15
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Yang Y, Anker MD, Fang J, Mahon MF, Maron L, Weetman C, Hill MS. Hydrodeoxygenation of isocyanates: snapshots of a magnesium-mediated C[double bond, length as m-dash]O bond cleavage. Chem Sci 2017; 8:3529-3537. [PMID: 30155199 PMCID: PMC6092714 DOI: 10.1039/c7sc00117g] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 02/28/2017] [Indexed: 11/24/2022] Open
Abstract
Organic isocyanates are readily converted to methyl amine products through their hydroboration with HBpin in the presence of a β-diketiminato magnesium catalyst. Although borylated amide and N-,O-bis(boryl)hemiaminal species have been identified as intermediates during the reductive catalysis, the overall reduction and C-O activation is metal-mediated and proposed to occur through the further intermediacy of well-defined magnesium formamidato, formamidatoborate and magnesium boryloxide derivatives. Examples of all these species have been identified and fully characterised through stoichiometric reactivity studies and the stability of the borate species leads us to suggest that, under catalytic conditions, the onward progress of the deoxygenation reaction is crucially dependent on the further activation provided by the Lewis acidic HBpin substrate. These deductions have been explored and ratified through a DFT study.
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Affiliation(s)
- Yan Yang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province , School of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , PR China .
| | - Mathew D Anker
- Department of Chemistry , University of Bath , Bath BA2 7AY , UK .
| | - Jian Fang
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province , School of Chemistry and Chemical Engineering , Lanzhou University , Lanzhou 730000 , PR China .
| | - Mary F Mahon
- Department of Chemistry , University of Bath , Bath BA2 7AY , UK .
| | - Laurent Maron
- LPCNO , Université de Toulouse , INSA Toulouse 135 , Avenue de Rangueil , 31077 Toulouse cedex , France
| | | | - Michael S Hill
- Department of Chemistry , University of Bath , Bath BA2 7AY , UK .
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16
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Martínez A, Moreno-Blázquez S, Rodríguez-Diéguez A, Ramos A, Fernández-Galán R, Antiñolo A, Carrillo-Hermosilla F. Simple ZnEt2as a catalyst in carbodiimide hydroalkynylation: structural and mechanistic studies. Dalton Trans 2017; 46:12923-12934. [DOI: 10.1039/c7dt02700a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Simple ZnEt2is an efficient catalyst for the addition of terminal alkynes to carbodiimides, through amidinate complexes, and consecutive isocyanate addition and intramolecular cyclohydroamination.
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Affiliation(s)
- Antonio Martínez
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Dpto. de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Ciencias y Tecnologías Químicas
- Universidad de Castilla-La Mancha
| | - Sonia Moreno-Blázquez
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Dpto. de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Ciencias y Tecnologías Químicas
- Universidad de Castilla-La Mancha
| | | | - Alberto Ramos
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Dpto. de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Ciencias y Tecnologías Químicas
- Universidad de Castilla-La Mancha
| | - Rafael Fernández-Galán
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Dpto. de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Ciencias y Tecnologías Químicas
- Universidad de Castilla-La Mancha
| | - Antonio Antiñolo
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Dpto. de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Ciencias y Tecnologías Químicas
- Universidad de Castilla-La Mancha
| | - Fernando Carrillo-Hermosilla
- Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- Dpto. de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Ciencias y Tecnologías Químicas
- Universidad de Castilla-La Mancha
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17
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He M, Gamer MT, Roesky PW. Homoleptic Chiral Benzamidinate Complexes of the Heavier Alkaline Earth Metals and the Divalent Lanthanides. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00373] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Meng He
- Institut für Anorganische
Chemie, Karlsruher Institut für Technologie (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Michael T. Gamer
- Institut für Anorganische
Chemie, Karlsruher Institut für Technologie (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Peter W. Roesky
- Institut für Anorganische
Chemie, Karlsruher Institut für Technologie (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
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18
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Kim SB, Yang C, Powers T, Davis LM, Lou X, Gordon RG. Synthesis of Calcium(II) Amidinate Precursors for Atomic Layer Deposition through a Redox Reaction between Calcium and Amidines. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602406] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sang Bok Kim
- Department of Chemistry and Chemical Biology Harvard University 12 Oxford Street Cambridge MA 02138 USA
| | - Chuanxi Yang
- Department of Chemistry and Chemical Biology Harvard University 12 Oxford Street Cambridge MA 02138 USA
| | - Tamara Powers
- Department of Chemistry Texas A&M University College Station TX 77843-3255 USA
| | - Luke M. Davis
- Department of Chemistry and Chemical Biology Harvard University 12 Oxford Street Cambridge MA 02138 USA
| | - Xiabing Lou
- Department of Chemistry and Chemical Biology Harvard University 12 Oxford Street Cambridge MA 02138 USA
| | - Roy G. Gordon
- Department of Chemistry and Chemical Biology Harvard University 12 Oxford Street Cambridge MA 02138 USA
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19
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Kim SB, Yang C, Powers T, Davis LM, Lou X, Gordon RG. Synthesis of Calcium(II) Amidinate Precursors for Atomic Layer Deposition through a Redox Reaction between Calcium and Amidines. Angew Chem Int Ed Engl 2016; 55:10228-33. [PMID: 27351794 PMCID: PMC5094530 DOI: 10.1002/anie.201602406] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 05/22/2016] [Indexed: 11/07/2022]
Abstract
We have prepared two new CaII amidinates, which comprise a new class of ALD precursors. The syntheses proceed by a direct reaction between Ca metal and the amidine ligands in the presence of ammonia. Bis(N,N′‐diisopropylformamidinato)calcium(II) (1) and bis(N,N′‐diisopropylacetamidinato)calcium(II) (2) adopt dimeric structures in solution and in the solid state. X‐ray crystallography revealed asymmetry in one of the bridging ligands to afford the structure [(η2‐L)Ca(μ‐η2:η2‐L)(μ‐η2:η1‐L)Ca(η2‐L)]. These amidinate complexes showed unprecedentedly high volatility as compared to the widely employed and commercially available CaII precursor, [Ca3(tmhd)6]. In CaS ALD with 1 and H2S, the ALD window was approximately two times wider and lower in temperature by about 150 °C than previously reported with [Ca3(tmhd)6] and H2S. Complexes 1 and 2, with their excellent volatility and thermal stability (up to at least 350 °C), are the first homoleptic CaII amidinates suitable for use as ALD precursors.
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Affiliation(s)
- Sang Bok Kim
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA
| | - Chuanxi Yang
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA
| | - Tamara Powers
- Department of Chemistry, Texas A&M University, College Station, TX, 77843-3255, USA
| | - Luke M Davis
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA
| | - Xiabing Lou
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA
| | - Roy G Gordon
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA.
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20
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Yadav S, Swamy VSVSN, Gonnade R, Sen SS. Benz-amidinato Stabilized a Monomeric Calcium Iodide and a Lithium Calciate(II) Cluster featuring Group 1 and Group 2 Elements. ChemistrySelect 2016. [DOI: 10.1002/slct.201600285] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sandeep Yadav
- Inorganic Chemistry and Catalysis Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - V. S. V. S. N. Swamy
- Inorganic Chemistry and Catalysis Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Rajesh Gonnade
- Physical and Material Chemistry Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pashan Pune 411008 India
| | - Sakya S. Sen
- Inorganic Chemistry and Catalysis Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pashan Pune 411008 India
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21
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Weetman C, Hill MS, Mahon MF. Magnesium Catalysis for the Hydroboration of Carbodiimides. Chemistry 2016; 22:7158-62. [DOI: 10.1002/chem.201600681] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Catherine Weetman
- Department of Chemistry; University of Bath; Claverton Down Bath BA2 7AY UK
| | - Michael S. Hill
- Department of Chemistry; University of Bath; Claverton Down Bath BA2 7AY UK
| | - Mary F. Mahon
- Department of Chemistry; University of Bath; Claverton Down Bath BA2 7AY UK
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22
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Hill MS, Liptrot DJ, Weetman C. Alkaline earths as main group reagents in molecular catalysis. Chem Soc Rev 2016; 45:972-88. [PMID: 26797470 DOI: 10.1039/c5cs00880h] [Citation(s) in RCA: 369] [Impact Index Per Article: 46.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The past decade has witnessed some remarkable advances in our appreciation of the structural and reaction chemistry of the heavier alkaline earth (Ae = Mg, Ca, Sr, Ba) elements. Derived from complexes of these metals in their immutable +2 oxidation state, a broad and widely applicable catalytic chemistry has also emerged, driven by considerations of cost and inherent low toxicity. The considerable adjustments incurred to ionic radius and resultant cation charge density also provide reactivity with significant mechanistic and kinetic variability as group 2 is descended. In an attempt to place these advances in the broader context of contemporary main group element chemistry, this review focusses on the developing state of the art in both multiple bond heterofunctionalisation and cross coupling catalysis. We review specific advances in alkene and alkyne hydroamination and hydrophosphination catalysis and related extensions of this reactivity that allow the synthesis of a wide variety of acyclic and heterocyclic small molecules. The use of heavier alkaline earth hydride derivatives as pre-catalysts and intermediates in multiple bond hydrogenation, hydrosilylation and hydroboration is also described along with the emergence of these and related reagents in a variety of dehydrocoupling processes that allow that facile catalytic construction of Si-C, Si-N and B-N bonds.
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Affiliation(s)
- Michael S Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
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23
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Rochat R, Lopez MJ, Tsurugi H, Mashima K. Recent Developments in Homogeneous Organomagnesium Catalysis. ChemCatChem 2015. [DOI: 10.1002/cctc.201500853] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Raphaël Rochat
- Department of Chemistry, Graduate School of Engineering Science Osaka University and CREST, JST Toyonaka Osaka 560-8531 Japan
| | - Michael J. Lopez
- Department of Chemistry, Graduate School of Engineering Science Osaka University and CREST, JST Toyonaka Osaka 560-8531 Japan
| | - Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science Osaka University and CREST, JST Toyonaka Osaka 560-8531 Japan
| | - Kazushi Mashima
- Department of Chemistry, Graduate School of Engineering Science Osaka University and CREST, JST Toyonaka Osaka 560-8531 Japan
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24
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Arrowsmith M, Hill MS, Kociok-Köhn G. Group 2 Catalysis for the Atom-Efficient Synthesis of Imidazolidine and Thiazolidine Derivatives. Chemistry 2015; 21:10548-57. [DOI: 10.1002/chem.201501328] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Indexed: 11/07/2022]
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25
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Hosseini A, Seidel D, Miska A, Schreiner PR. Fluoride-Assisted Activation of Calcium Carbide: A Simple Method for the Ethynylation of Aldehydes and Ketones. Org Lett 2015; 17:2808-11. [DOI: 10.1021/acs.orglett.5b01219] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Abolfazl Hosseini
- Institute
of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Daniel Seidel
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Andreas Miska
- Institute
of Inorganic and Analytical Chemistry, Justus-Liebig University, Heinrich-Buff-Ring
58, 35392 Giessen, Germany
| | - Peter R. Schreiner
- Institute
of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
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26
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Schwamm RJ, Day BM, Mansfield NE, Knowelden W, Hitchcock PB, Coles MP. Catalytic bond forming reactions promoted by amidinate, guanidinate and phosphaguanidinate compounds of magnesium. Dalton Trans 2015; 43:14302-14. [PMID: 24852040 DOI: 10.1039/c4dt01097c] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The synthesis and catalytic properties of a series of magnesium compounds consisting of monoanionic, N,N'-chelating ligands (N∩N = amidinates, guanidinates, phosphaguanidinates) is reported. The compounds were synthesized by (i) insertion of a carbodiimide into an existing Mg-C or Mg-N bond, or (ii) protonolysis of an organomagnesium compound by a neutral pre-ligand. Structural analyses of mono- or bis-(chelate) compounds with general formula Mg(N∩N)X(L)n and Mg(N∩N)2(L)n (X = halide, aryloxide, amide; L = Et2O, THF; n = 0, 1 or 2) have been performed and the influence that the ligand substituent patterns have on the solid-state structures has been probed. Selected examples of the compounds were tested as (pre)catalysts for the polymerization of lactide, the dimerization of aldehydes and the hydroacetylenation of carbodiimides.
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Affiliation(s)
- Ryan J Schwamm
- School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, 6012, New Zealand.
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27
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Sroor FM, Hrib CG, Hilfert L, Busse S, Edelmann FT. Synthesis and catalytic activity of homoleptic lanthanide-tris(cyclopropylethinyl)amidinates. NEW J CHEM 2015. [DOI: 10.1039/c5nj00555h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New unsolvated, homoleptic lanthanide(iii) tris(cyclopropylethinylamidinate) complexes of the type [c-C3H5–CC–C(NR)2]3Ln (R = iPr, cyclohexyl; Ln = Nd, Sm, Ho) have been prepared and the crystal structure of the holmium derivative [c-C3H5–CC–C(NiPr)2]3Ho has been confirmed by X-ray diffraction.
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Affiliation(s)
- Farid M. Sroor
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Cristian G. Hrib
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Liane Hilfert
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Sabine Busse
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
| | - Frank T. Edelmann
- Chemisches Institut der Otto-von-Guericke-Universität Magdeburg
- 39106 Magdeburg
- Germany
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28
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Zhang F, Zhang J, Zhang Y, Hong J, Zhou X. Rare-Earth-Metal-Catalyzed Addition of Terminal Monoalkynes and Dialkynes with Aryl-Substituted Symmetrical or Unsymmetrical Carbodiimides. Organometallics 2014. [DOI: 10.1021/om5008665] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Fangjun Zhang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, People’s Republic of China
| | - Jie Zhang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, People’s Republic of China
| | - Yin Zhang
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, People’s Republic of China
| | - Jianquan Hong
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, People’s Republic of China
| | - Xigeng Zhou
- Department of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, People’s Republic of China
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29
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Arrowsmith M, Shepherd WMS, Hill MS, Kociok-Köhn G. Alkaline earth catalysis for the 100% atom-efficient three component assembly of imidazolidin-2-ones. Chem Commun (Camb) 2014; 50:12676-9. [PMID: 25209547 DOI: 10.1039/c4cc05223d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A variety of functionalised imidazolidin-2-ones may be synthesised under very mild reaction conditions using non-toxic and cost-effective alkaline earth bis(amide) pre-catalysts in a 100% atom-efficient, intermolecular one-pot assembly from inexpensive alkyne and cumulene reagents.
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