1
|
Kovach J, Golisz SR, Brennessel WW, Jones WD. Iridium(I)– and Rhodium(I)–Olefin Complexes Containing an α-Diimine Supporting Ligand. Organometallics 2022; 41:3167-3174. [DOI: 10.1021/acs.organomet.2c00036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- James Kovach
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Suzanne R. Golisz
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William W. Brennessel
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William D. Jones
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| |
Collapse
|
2
|
Trummer D, Nobile AG, Payard PA, Ashuiev A, Kakiuchi Y, Klose D, Jeschke G, Copéret C. Union carbide polymerization catalysts: from uncovering active site structures to designing molecularly-defined analogs. Chem Sci 2022; 13:11091-11098. [PMID: 36320461 PMCID: PMC9517275 DOI: 10.1039/d2sc04235e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Accepted: 09/01/2022] [Indexed: 11/21/2022] Open
Abstract
The Union Carbide (UC) ethylene polymerization catalysts, based on chromocene dispersed on silica, show distinct features from the Phillips catalysts, but share the same heated debate regarding the structure of their active sites. Based on a combination of IR, EPR spectroscopies, labeling experiments, and DFT modeling, we identified monomeric surface-supported Cr(iii) hydrides, (
Created by potrace 1.16, written by Peter Selinger 2001-2019
]]>
SiO)Cr(Cp)–H, as the active sites of the UC catalyst. These sites are formed in the presence of grafted and adsorbed chromocene as well as residual surface OH groups, only possible at high Cr loading, and involve a C–H activation of the Cp ring. These Cr-hydrides initiate polymerization, yielding Cr(iii) alkyl species that insert ethylene through a Cossee–Arlman-type mechanism, as evidenced by spectroscopic studies. These insights inspired the design of a well-defined analog, CpCr(CH(SiMe3)2)2 grafted on partially dehydroxylated silica, that shows similar spectroscopic and polymer structure to the UC catalyst, further supporting the proposed active site structure. A combined SOMC and DFT studies on the Union Carbide catalyst enable to propose that Cr(iii)-H, formed at high-loading, are active in ethylene polymerization. We therefore design a well-defined supported CpCr(iii)-R ethylene polymerization catalyst.![]()
Collapse
Affiliation(s)
- David Trummer
- ETH Zürich Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 2, Zürich CH-8093, Switzerland
| | - Anna Giorgia Nobile
- ETH Zürich Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 2, Zürich CH-8093, Switzerland
| | - Pierre-Adrien Payard
- ETH Zürich Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 2, Zürich CH-8093, Switzerland
| | - Anton Ashuiev
- ETH Zürich Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 2, Zürich CH-8093, Switzerland
| | - Yuya Kakiuchi
- ETH Zürich Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 2, Zürich CH-8093, Switzerland
| | - Daniel Klose
- ETH Zürich Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 2, Zürich CH-8093, Switzerland
| | - Gunnar Jeschke
- ETH Zürich Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 2, Zürich CH-8093, Switzerland
| | - Christophe Copéret
- ETH Zürich Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 2, Zürich CH-8093, Switzerland
| |
Collapse
|
3
|
Munir N, Masood S, Liaqat F, Tahir MN, Yousuf S, Kalsoom S, Mughal EU, Sumrra SH, Maalik A, Zafar MN. Synthesis of new Pro-PYE ligands as co-catalysts toward Pd-catalyzed Heck-Mizoroki cross coupling reactions. RSC Adv 2019; 9:37986-38000. [PMID: 35541803 PMCID: PMC9075740 DOI: 10.1039/c9ra07912b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 11/07/2019] [Indexed: 11/25/2022] Open
Abstract
The present research work describes the synthesis of five new ligands containing pyridinium amine, [H2L1][OTf]2-[H2L5][I]2 from two new precursors, [P3 Et][I] and [P2 Me][CF3SO3]. The structure elucidations of the compounds were confirmed by multinuclear NMR (1H, 13C), FT-IR and by single crystal XRD techniques. Theoretical DFT studies were carried out to get better insight into the electronic levels and structural features of all the molecules. These synthesized new Pro-PYE ligands [H2L1][OTf]2-[H2L5][I]2 were found to be significantly active as co-catalysts for Pd(CH3CO2)2 toward Heck-Mizoroki coupling reactions with wide substrate scope in the order of [H2L1][OTf]2 ≫ [H2L2][OTf]2 > [H2L3][OTf]2 > [H2L4][OTf]2 > [H2L5][I]2.
Collapse
Affiliation(s)
- Naima Munir
- Department of Chemistry, Quaid-i-Azam University Islamabad-45320 Pakistan +923314503061
| | - Sara Masood
- Department of Chemistry, Quaid-i-Azam University Islamabad-45320 Pakistan +923314503061
| | - Faroha Liaqat
- Department of Chemistry, Quaid-i-Azam University Islamabad-45320 Pakistan +923314503061
| | | | - Sammer Yousuf
- H. E. J. Research Institute of Chemistry, International Centre for Chemical and Biological Sciences, University of Karachi 75270 Pakistan
| | - Saima Kalsoom
- Centre for Interdisciplinary Research in Basic Sciences (CIRBS), International Islamic University Islamabad Pakistan
| | | | | | - Aneela Maalik
- Department of Chemistry, COMSATS University Islamabad, Islamabad Campus Park Road Islamabad-45550 Pakistan +923335490834
| | - Muhammad Naveed Zafar
- Department of Chemistry, Quaid-i-Azam University Islamabad-45320 Pakistan +923314503061
| |
Collapse
|
4
|
Campos J, López-Serrano J, Peloso R, Carmona E. Methyl Complexes of the Transition Metals. Chemistry 2016; 22:6432-57. [PMID: 26991740 DOI: 10.1002/chem.201504483] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Indexed: 01/11/2023]
Abstract
Organometallic chemistry can be considered as a wide area of knowledge that combines concepts of classic organic chemistry, that is, based essentially on carbon, with molecular inorganic chemistry, especially with coordination compounds. Transition-metal methyl complexes probably represent the simplest and most fundamental way to view how these two major areas of chemistry combine and merge into novel species with intriguing features in terms of reactivity, structure, and bonding. Citing more than 500 bibliographic references, this review aims to offer a concise view of recent advances in the field of transition-metal complexes containing M-CH3 fragments. Taking into account the impressive amount of data that are continuously provided by organometallic chemists in this area, this review is mainly focused on results of the last five years. After a panoramic overview on M-CH3 compounds of Groups 3 to 11, which includes the most recent landmark findings in this area, two further sections are dedicated to methyl-bridged complexes and reactivity.
Collapse
Affiliation(s)
- Jesús Campos
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Joaquín López-Serrano
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Riccardo Peloso
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Ernesto Carmona
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain.
| |
Collapse
|
5
|
Li H, Hall MB. Role of the Chemically Non-Innocent Ligand in the Catalytic Formation of Hydrogen and Carbon Dioxide from Methanol and Water with the Metal as the Spectator. J Am Chem Soc 2015; 137:12330-42. [DOI: 10.1021/jacs.5b07444] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Haixia Li
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| | - Michael B. Hall
- Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, United States
| |
Collapse
|
6
|
Kissel AA, Mahrova TV, Lyubov DM, Cherkasov AV, Fukin GK, Trifonov AA, Del Rosal I, Maron L. Metallacyclic yttrium alkyl and hydrido complexes: synthesis, structures and catalytic activity in intermolecular olefin hydrophosphination and hydroamination. Dalton Trans 2015; 44:12137-48. [PMID: 25710900 DOI: 10.1039/c5dt00129c] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Metallacyclic neutral and ionic yttrium alkyl complexes coordinated by a dianionic ene-diamido ligand ([2,6-iPr2C6H3NC(Me)=C(Me)NC6H3iPr2-2,6] = L(1)) [L(1)]Y(CH2SiMe3)(THF)2 (2), {[L(1)]Y(CH2SiMe3)2}(-){Li(THF)4}(+) (3), [L(1)]Y(OEt2)(μ-Me)2Li(TMEDA) (4) were synthesized using a salt-metathesis approach starting from the related chloro complex [L(1)]Y(THF)2(μ-Cl)2Li(THF)2 (1) in 70, 85 and 72% yields respectively. The reactions of 2 with H2 or PhSiH3 afford the dimeric hydride {[L(1)]Y(THF)(μ-H)}2(μ-THF) (5) containing two μ-bridging hydrido and one μ-bridging THF ligands (91 and 85% yields). The X-ray studies of complexes 2, 3 and 5 revealed η(2)-coordination of the C=C fragment of an ene-diamido ligand to a Y cation. DFT calculations were carried out to give an insight into the metal-ligand bonding and especially the interaction between the metal and the ene-diamido ligand. The observed bonding of the ene-diamido fragment is found to reflect the acidity of the metal center in the complex that is partially overcome by a better donation from the double bond (better overlap with an empty d orbital at the yttrium center). The treatment of complex 4 with DME resulted in the C-O bond cleavage of DME and afforded a three nuclear methoxide oxide complex [{[L(1)]Y}3(μ(2)-OMe)3(μ(3)-O)](2-)[Li(DME)3](+)2 (6). Complexes 2, 3, 5 and 7 proved to be efficient precatalysts for the intermolecular hydrophosphination of styrene, 4-vinylpyridine, and 1-nonene with PhPH2 and Ph2PH as well as hydroamination of styrene and pyrrolidine.
Collapse
Affiliation(s)
- Alexander A Kissel
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, 603950 Nizhny Novgorod, GSP-445, Russia.
| | | | | | | | | | | | | | | |
Collapse
|
7
|
Tanahashi H, Tsurugi H, Mashima K. Synthesis of Alkyl and Alkylidene Complexes of Tungsten Bearing Imido and Redox-Active α-Diimine or o-Iminoquinone Ligands and Their Application as Catalysts for Ring-Opening Metathesis Polymerization of Norbornene. Organometallics 2015. [DOI: 10.1021/om501010n] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Hiromasa Tanahashi
- 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
| |
Collapse
|
8
|
Shen J, Yap GPA, Barker IV WE, Geiger WE, Theopold KH. An electron transfer series of octahedral chromium complexes containing a redox non-innocent α-diimine ligand. Chem Commun (Camb) 2014; 50:10626-9. [DOI: 10.1039/c4cc03332a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
9
|
Cole BE, Wolbach JP, Dougherty WG, Piro NA, Kassel WS, Graves CR. Synthesis and Characterization of Aluminum-α-diimine Complexes over Multiple Redox States. Inorg Chem 2014; 53:3899-906. [DOI: 10.1021/ic5003989] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bren E. Cole
- Department of Chemistry & Biochemistry, Albright College, 13th & Bern Street, Reading, Pennsylvania 19612, United States
| | - Jeffrey P. Wolbach
- Department of Chemistry & Biochemistry, Albright College, 13th & Bern Street, Reading, Pennsylvania 19612, United States
| | - William G. Dougherty
- Department of Chemistry, Villanova University, 800 Lancaster Avenue, Villanova, Pennsylvania 19085, United States
| | - Nicholas A. Piro
- Department of Chemistry, Villanova University, 800 Lancaster Avenue, Villanova, Pennsylvania 19085, United States
| | - W. Scott Kassel
- Department of Chemistry, Villanova University, 800 Lancaster Avenue, Villanova, Pennsylvania 19085, United States
| | - Christopher R. Graves
- Department of Chemistry & Biochemistry, Albright College, 13th & Bern Street, Reading, Pennsylvania 19612, United States
| |
Collapse
|
10
|
Eiβler A, Kläring P, Emmerling F, Braun T. α‐Dialdimine Complexes of Rhodium(I) and Iridium(I): Their Reactivity with Dioxygen and Dihydrogen. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300625] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anna Eiβler
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
| | - Paul Kläring
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
| | - Franziska Emmerling
- BAM Federal Institute for Materials Research and Testing, Richard‐Willstätter‐Str. 11, 12489 Berlin, Germany
| | - Thomas Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
| |
Collapse
|
11
|
Scarborough CC, Sproules S, Doonan CJ, Hagen KS, Weyhermüller T, Wieghardt K. Scrutinizing Low-Spin Cr(II) Complexes. Inorg Chem 2012; 51:6969-82. [DOI: 10.1021/ic300882r] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christopher C. Scarborough
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstraße
34-36, D-45470 Mülheim an der Ruhr, Germany
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta Georgia
30322, United States
| | - Stephen Sproules
- EPSRC
National UK EPR Facility
and Service, Photon Science Institute, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Christian J. Doonan
- School of Chemistry and Physics, The University of Adelaide, SA 5005, Australia
| | - Karl S. Hagen
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta Georgia
30322, United States
| | - Thomas Weyhermüller
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstraße
34-36, D-45470 Mülheim an der Ruhr, Germany
| | - Karl Wieghardt
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstraße
34-36, D-45470 Mülheim an der Ruhr, Germany
| |
Collapse
|
12
|
Kaim W. The Shrinking World of Innocent Ligands: Conventionaland Non-Conventional Redox-Active Ligands. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101359] [Citation(s) in RCA: 233] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
13
|
Zhou W, Chiang L, Patrick BO, Storr T, Smith KM. Cyclopentadienyl chromium diimine and pyridine-imine complexes: ligand-based radicals and metal-based redox chemistry. Dalton Trans 2012; 41:7920-30. [DOI: 10.1039/c2dt30160a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|