1
|
Zakis JM, Smejkal T, Wencel-Delord J. Cyclometallated complexes as catalysts for C-H activation and functionalization. Chem Commun (Camb) 2021; 58:483-490. [PMID: 34735563 DOI: 10.1039/d1cc05195d] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The development of novel catalysts for C-H activation reactions with increased reactivity and improved selectivities has been attracting significant interest over the last two decades. More recently, promising results have been developed using tridentate pincer ligands, which form a stable C-M bond. Furthermore, based on mechanistic studies, the unique catalytic role of some metallacyclic intermediate species has been revealed. These experimental observations have subsequently translated into the rational design of advanced C-H activation catalysts in both Ru- and Ir-based systems. Recent breakthroughs in the field of C-H activation catalysed by metallacyclic intermediates are thus discussed.
Collapse
Affiliation(s)
- Janis Mikelis Zakis
- Process Chemistry Research, Syngenta Crop Protection AG, Schaffhauserstrasse 101, Stein AG 4332, Switzerland. .,Laboratoire d'Innovation Moléculaire et Applications (UMR CNRS 7042), Université de Strasbourg/Université de Haute-Alsace, ECPM, Strasbourg 67087, France.
| | - Tomas Smejkal
- Process Chemistry Research, Syngenta Crop Protection AG, Schaffhauserstrasse 101, Stein AG 4332, Switzerland.
| | - Joanna Wencel-Delord
- Laboratoire d'Innovation Moléculaire et Applications (UMR CNRS 7042), Université de Strasbourg/Université de Haute-Alsace, ECPM, Strasbourg 67087, France.
| |
Collapse
|
2
|
Johnson SI, Blakemore JD, Brunschwig BS, Lewis NS, Gray HB, Goddard WA, Persson P. Design of robust 2,2'-bipyridine ligand linkers for the stable immobilization of molecular catalysts on silicon(111) surfaces. Phys Chem Chem Phys 2021; 23:9921-9929. [PMID: 33908502 DOI: 10.1039/d1cp00545f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The attachment of the 2,2'-bipyridine (bpy) moieties to the surface of planar silicon(111) (photo)electrodes was investigated using ab initio simulations performed on a new cluster model for methyl-terminated silicon. Density functional theory (B3LYP) with implicit solvation techniques indicated that adventitious chlorine atoms, when present in the organic linker backbone, led to instability at very negative potentials of the surface-modified electrode. In prior experimental work, chlorine atoms were present as a trace surface impurity due to required surface processing chemistry, and thus could plausibly result in the observed surface instability of the linker. Free energy calculations for the Cl-atom release process with model silyl-linker constructs revealed a modest barrier (14.9 kcal mol-1) that decreased as the electrode potential became more negative. A small library of new bpy-derived structures has additionally been explored computationally to identify strategies that could minimize chlorine-induced linker instability. Structures with fluorine substituents are predicted to be more stable than their chlorine analogues, whereas fully non-halogenated structures are predicted to exhibit the highest stability. The behavior of a hydrogen-evolving molecular catalyst Cp*Rh(bpy) (Cp* = pentamethylcyclopentadienyl) immobilized on a silicon(111) cluster was explored theoretically to evaluate differences between the homogeneous and surface-attached behavior of this species in a tautomerization reaction observed under reductive conditions for catalytic H2 evolution. The calculated free energy difference between the tautomers is small, hence the results suggest that use of reductively stable linkers can enable robust attachment of catalysts while maintaining chemical behavior on the electrode similar to that exhibited in homogeneous solution.
Collapse
Affiliation(s)
- Samantha I Johnson
- Materials Research Center, California Institute of Technology, Pasadena, CA 91125, USA.
| | | | | | | | | | | | | |
Collapse
|
3
|
Jalali M, Hyland CJT, Bissember AC, Yates BF, Ariafard A. Hydroalkylation of Alkenes with 1,3-Diketones via Gold(III) or Silver(I) Catalysis: Divergent Mechanistic Pathways Revealed by a DFT-Based Investigation. ACS Catal 2021. [DOI: 10.1021/acscatal.0c05260] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Mona Jalali
- School of Natural Sciences—Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Christopher J. T. Hyland
- School of Chemistry and Molecular Bioscience, University of Wollongong, Wollongong, New South Wales 2522, Australia
| | - Alex C. Bissember
- School of Natural Sciences—Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Brian F. Yates
- School of Natural Sciences—Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Alireza Ariafard
- School of Natural Sciences—Chemistry, University of Tasmania, Hobart, Tasmania 7001, Australia
| |
Collapse
|
4
|
Hanson DS, Wang Y, Zhou X, Washburn E, Ekmekci MB, Dennis D, Paripati A, Xiao D, Zhou M. Catalytic Urea Synthesis from Ammonium Carbamate Using a Copper(II) Complex: A Combined Experimental and Theoretical Study. Inorg Chem 2021; 60:5573-5589. [PMID: 33826330 DOI: 10.1021/acs.inorgchem.0c03467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The synthesis of urea fertilizer is currently the largest CO2 conversion process by volume in the industry. In this process, ammonium carbamate is an intermediate en route to urea formation. We determined that the tetraammineaquacopper(II) sulfate complex, [Cu(NH3)4(OH2)]SO4, catalyzed the formation of urea from ammonium carbamate in an aqueous solution. A urea yield of up to 18 ± 6% was obtained at 120 °C after 15 h and in a high-pressure metal reactor. No significant urea formed without the catalyst. The urea product was characterized by Fourier transform infrared (FT-IR), powder X-ray diffraction (PXRD), and quantitative 1H{13C} NMR analyses. The [Cu(NH3)4(OH2)]SO4 catalyst was then recovered at the end of the reaction in a 29% recovery yield, as verified by FT-IR, PXRD, and quantitative UV-vis spectroscopy. A precipitation method using CO2 was developed to recover and reuse 66 ± 3% of Cu(II). The catalysis mechanism was investigated by the density functional theory at the B3LYP/6-31G** level with an SMD continuum solvent model. We determined that the [Cu(NH3)4]2+ complex is likely an effective catalyst structure. The study of the catalysis mechanism suggests that the coordinated carbamate with [Cu(NH3)4]2+ is likely the starting point of the catalyzed reaction, and carbamic acid can be involved as a transient intermediate that facilitates the removal of an OH group. Our work has paved the way for the rational design of catalysts for urea synthesis from the greenhouse gas CO2.
Collapse
Affiliation(s)
- Danielle S Hanson
- Department of Natural Sciences, Lawrence Technological University, 21000 West Ten Mile Road, Southfield, Michigan 48075, United States
| | - Yigui Wang
- Center for Integrative Materials Discovery, Department of Chemistry and Chemical Engineering, University of New Haven, 300 Boston Post Road, West Haven, Connecticut 06516, United States
| | - Xinrui Zhou
- Department of Natural Sciences, Lawrence Technological University, 21000 West Ten Mile Road, Southfield, Michigan 48075, United States
| | - Erik Washburn
- Department of Natural Sciences, Lawrence Technological University, 21000 West Ten Mile Road, Southfield, Michigan 48075, United States
| | - Merve B Ekmekci
- Department of Natural Sciences, Lawrence Technological University, 21000 West Ten Mile Road, Southfield, Michigan 48075, United States
| | - Donovan Dennis
- Department of Natural Sciences, Lawrence Technological University, 21000 West Ten Mile Road, Southfield, Michigan 48075, United States
| | - Amay Paripati
- Department of Natural Sciences, Lawrence Technological University, 21000 West Ten Mile Road, Southfield, Michigan 48075, United States
| | - Dequan Xiao
- Center for Integrative Materials Discovery, Department of Chemistry and Chemical Engineering, University of New Haven, 300 Boston Post Road, West Haven, Connecticut 06516, United States
| | - Meng Zhou
- Department of Natural Sciences, Lawrence Technological University, 21000 West Ten Mile Road, Southfield, Michigan 48075, United States
| |
Collapse
|
5
|
Guzmán J, Bernal AM, García-Orduña P, Lahoz FJ, Polo V, Fernández-Alvarez FJ. 2-Pyridone-stabilized iridium silylene/silyl complexes: structure and QTAIM analysis. Dalton Trans 2020; 49:17665-17673. [PMID: 33232415 DOI: 10.1039/d0dt03326j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Iridium(iii) complexes of the general formula [Ir(X)(κ2-NSiiPr2)2] (NSiiPr2 = (4-methyl-pyridine-2-yloxy)diisopropylsilyl; X = Cl, 3; CF3SO3, 5; CF3CO2, 6) have been prepared and fully characterized, including X-ray diffraction studies and theoretical calculations. The presence of isopropyl substituents at the silicon atom favours the monomeric structure found in complexes 3 and 5. The short Ir-Si bond distances (2.25-2.28 Å) indicate some degree of base-stabilized silylene character of the Ir-Si bond in 3, 5 and 6 assisted by the 2-pyridone moiety. However, the shortening of these Ir-Si bonds might be a consequence of the constrained 2-pyridone geometry, and consequently the silyl character of these bonds can not be excluded. A DFT theoretical study on the nature of the Ir-Si bonds has been performed for complex 3 as well as for four other iridium complexes finding representative examples of different bonding situations between Ir and Si atoms: silylene, base-assisted silylene (both with an anionic base and with a neutral base), and silyl bonds, using the topological properties of the electron charge density. The results of these studies show that the Ir-Si bonds in Ir-NSiiPr2 complexes can be considered as an intermediate between the base-stabilized silylene and silyl cases, and therefore they have been proposed as 2-pyridone-stabilized iridium silylene/silyl bonds.
Collapse
Affiliation(s)
- Jefferson Guzmán
- Departamento de Química Inorgánica-Instituto de Síntesis Química y Catálisis Homogénea (ISQCH), Universidad de Zaragoza-CSIC, Facultad de Ciencias, 50009 Zaragoza, Spain.
| | | | | | | | | | | |
Collapse
|
6
|
Li N, Zhu WJ, Huang JJ, Hao XQ, Gong JF, Song MP. Chiral NCN Pincer Iridium(III) Complexes with Bis(imidazolinyl)phenyl Ligands: Synthesis and Application in Enantioselective C–H Functionalization of Indoles with α-Aryl-α-diazoacetates. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00174] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nan Li
- College of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Wen-Jing Zhu
- College of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Juan-Juan Huang
- College of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Xin-Qi Hao
- College of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jun-Fang Gong
- College of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Mao-Ping Song
- College of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| |
Collapse
|
7
|
Ibarra-Vázquez MF, Alvarado-Rodríguez JG, Esqueda AC, Rangel-Salas II, Serrano O. Synthesis, structural characterization, and activity on the transfer hydrogenation reaction of dimesitylacetonate piano stool organometallic complexes of Ru(II), Rh(III), and Ir(III). J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.04.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
8
|
Revisiting the mechanism of acetylenic amine N-Oxide rearrangement catalysed by Gold(I) complexes from a DFT perspective. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.03.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
9
|
Guzmán J, García-Orduña P, Polo V, Lahoz FJ, Oro LA, Fernández-Alvarez FJ. Ir-catalyzed selective reduction of CO2 to the methoxy or formate level with HSiMe(OSiMe3)2. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02353k] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Ir-NSi-based catalysts allow controlling the selective reduction of CO2 with HSiMe(OSiMe3)2 to afford methoxysilane or silyl formate.
Collapse
Affiliation(s)
- Jefferson Guzmán
- Departamento de Química Inorgánica – Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza
- Zaragoza
- Spain
| | - Pilar García-Orduña
- Departamento de Química Inorgánica – Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza
- Zaragoza
- Spain
| | - Víctor Polo
- Departamento de Química Física – Instituto de Biocomputación y Física de Sistemas Complejos (BIFI) – Universidad de Zaragoza
- Zaragoza
- Spain
| | - Fernando J. Lahoz
- Departamento de Química Inorgánica – Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza
- Zaragoza
- Spain
| | - Luis A. Oro
- Departamento de Química Inorgánica – Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza
- Zaragoza
- Spain
| | - Francisco J. Fernández-Alvarez
- Departamento de Química Inorgánica – Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza
- Zaragoza
- Spain
| |
Collapse
|
10
|
Nien KC, Chang FT, Chang MB. Adsorption of mesitylene via mesoporous adsorbents. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION (1995) 2017; 67:1319-1327. [PMID: 28742986 DOI: 10.1080/10962247.2017.1359701] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 07/06/2017] [Accepted: 07/18/2017] [Indexed: 06/07/2023]
Abstract
UNLABELLED Mesitylene (or 1,3,5-trimethylbenzene) is a volatile organic compound emitted from various industrial processes, e.g., spray coating. Its emissions have become a critical issue because mesitylene is toxic and cannot be removed using traditional adsorbents, e.g., zeolite (H-ZSM-5; the diameter of mesitylene molecules is greater than the pore size of H-ZSM-5). Hence, an adsorbent with a large pore size, MCM-41, is used in this study to investigate its adsorption capacity for mesitylene and compare with that of H-ZSM-5. Experimental results reveal that MCM-41 without Al2O3 exhibits a good adsorption capacity (184 mg/g) for the gas stream containing 100 ppm of mesitylene at a relative humidity of 10%. The adsorption kinetics is well described by the Freundlich isotherm. Furthermore, experimental results reveal that MCM-41 is effective for the adsorption of low concentrations (10 ppm) of mesitylene. In addition, adsorption-desorption tests revealed that the sample MCM-41-AS is stable to sustain the adsorption capacity after 10 adsorption-desorption cycles. After 10 adsorption-desorption cycles, MCM-41-AS retains 92.4% of its initial adsorption capacity (170 vs. 184 mg/g). Finally, MCM-41 and H-ZSM-5 in series are effective for the simultaneous removal of mesitylene and toluene in the gas stream. IMPLICATIONS This study aims to improve the performance of adsorbent for mesitylene, which is typically applied in the spray-coating industry. The zeolite MCM-41-AS is selected as a candidate for the investigation. Experimental results reveal that MCM-41-AS exhibits a good adsorption capacity for mesitylene and that it can be integrated with H-ZSM-5-25 for the simultaneous adsorption of mesitylene and toluene.
Collapse
Affiliation(s)
- Kai Chun Nien
- a Graduate Institute of Environmental Engineering , National Central University , Taoyuan City , Taiwan , Republic of China
- b JG Environmental Technology Co., Ltd ., Taoyuan City , Taiwan , Republic of China
| | - Feng Tang Chang
- b JG Environmental Technology Co., Ltd ., Taoyuan City , Taiwan , Republic of China
| | - Moo Been Chang
- a Graduate Institute of Environmental Engineering , National Central University , Taoyuan City , Taiwan , Republic of China
| |
Collapse
|
11
|
Davies DL, Macgregor SA, McMullin CL. Computational Studies of Carboxylate-Assisted C-H Activation and Functionalization at Group 8-10 Transition Metal Centers. Chem Rev 2017; 117:8649-8709. [PMID: 28530807 DOI: 10.1021/acs.chemrev.6b00839] [Citation(s) in RCA: 398] [Impact Index Per Article: 56.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Computational studies on carboxylate-assisted C-H activation and functionalization at group 8-10 transition metal centers are reviewed. This Review is organized by metal and will cover work published from late 2009 until mid-2016. A brief overview of computational work prior to 2010 is also provided, and this outlines the understanding of carboxylate-assisted C-H activation in terms of the "ambiphilic metal-ligand assistance" (AMLA) and "concerted metalation deprotonation" (CMD) concepts. Computational studies are then surveyed in terms of the nature of the C-H bond being activated (C(sp2)-H or C(sp3)-H), the nature of the process involved (intramolecular with a directing group or intermolecular), and the context (stoichiometric C-H activation or within a variety of catalytic processes). This Review aims to emphasize the connection between computation and experiment and to highlight the contribution of computational chemistry to our understanding of catalytic C-H functionalization based on carboxylate-assisted C-H activation. Some opportunities where the interplay between computation and experiment may contribute further to the areas of catalytic C-H functionalization and applied computational chemistry are identified.
Collapse
Affiliation(s)
- David L Davies
- Department of Chemistry, University of Leicester , Leicester LE1 7RH, United Kingdom
| | - Stuart A Macgregor
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh EH14 4AS, United Kingdom
| | - Claire L McMullin
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh EH14 4AS, United Kingdom
| |
Collapse
|
12
|
Gao Y, Guan C, Zhou M, Kumar A, Emge TJ, Wright AM, Goldberg KI, Krogh-Jespersen K, Goldman AS. β-Hydride Elimination and C–H Activation by an Iridium Acetate Complex, Catalyzed by Lewis Acids. Alkane Dehydrogenation Cocatalyzed by Lewis Acids and [2,6-Bis(4,4-dimethyloxazolinyl)-3,5-dimethylphenyl]iridium. J Am Chem Soc 2017; 139:6338-6350. [DOI: 10.1021/jacs.6b12995] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yang Gao
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, United States
| | - Changjian Guan
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, United States
| | - Meng Zhou
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, United States
- Department
of Natural Sciences, Lawrence Technological University, Southfield, Michigan 48075, United States
| | - Akshai Kumar
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, United States
- Department
of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Thomas J. Emge
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, United States
| | - Ashley M. Wright
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Karen I. Goldberg
- Department
of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Karsten Krogh-Jespersen
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, United States
| | - Alan S. Goldman
- Department
of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08903, United States
| |
Collapse
|
13
|
Kathiravan S, Nicholls IA. Monoprotected l
-Amino Acid (l
-MPAA), Accelerated Bromination, Chlorination, and Iodination of C(sp2
)−H Bonds by Iridium(III) Catalysis. Chemistry 2017; 23:7031-7036. [DOI: 10.1002/chem.201700280] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Indexed: 01/19/2023]
Affiliation(s)
- Subban Kathiravan
- Department of Chemistry and Biomedical Sciences; Linnaeus University Centre for Biomaterials Chemistry; Linnaeus University; 391 82 Kalmar Sweden
| | - Ian A. Nicholls
- Department of Chemistry and Biomedical Sciences; Linnaeus University Centre for Biomaterials Chemistry; Linnaeus University; 391 82 Kalmar Sweden
- Department of Chemistry-BMC; Uppsala University; 751 23 Uppsala Sweden
| |
Collapse
|
14
|
Zhou M, Goldman AS. Chlorination of (Phebox)Ir(mesityl)(OAc) by Thionyl Chloride. Molecules 2015; 20:10122-30. [PMID: 26039335 PMCID: PMC6272745 DOI: 10.3390/molecules200610122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 05/29/2015] [Indexed: 12/03/2022] Open
Abstract
Pincer (Phebox)Ir(mesityl)(OAc) (2) (Phebox = 3,5-dimethylphenyl-2,6-bis(oxazolinyl)) complex, formed by benzylic C-H activation of mesitylene (1,3,5-trimethylbenzene) using (Phebox)Ir(OAc)2OH2 (1), was treated with thionyl chloride to rapidly form 1-(chloromethyl)-3,5-dimethylbenzene in 50% yield at 23 °C. A green species was obtained at the end of reaction, which decomposed during flash column chromatography to form (Phebox)IrCl2OH2 in 87% yield.
Collapse
Affiliation(s)
- Meng Zhou
- Department of Chemistry and Chemical Biology, Rutgers New Brunswick-Busch Campus, 610 Taylor Road, Piscataway, NJ 08854, USA.
| | - Alan S Goldman
- Department of Chemistry and Chemical Biology, Rutgers New Brunswick-Busch Campus, 610 Taylor Road, Piscataway, NJ 08854, USA.
| |
Collapse
|