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Wang D, Zhou S, Liu Y, Kang X, Liu S, Li Z, Braunstein P. Controlling Polyethylene Molecular Weights and Distributions Using Chromium Complexes Supported by SNN-Tridentate Ligands. Macromolecules 2022. [DOI: 10.1021/acs.macromol.1c02351] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dongqi Wang
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Shengmei Zhou
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yongxin Liu
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Xiaohui Kang
- College of Pharmacy, Dalian Medical University, Dalian 116044, China
| | - Shaofeng Liu
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Zhibo Li
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Pierre Braunstein
- Laboratoire de Chimie de Coordination, CNRS, CHIMIE UMR 7177, Université de Strasbourg, 4 rue Blaise Pascal, 67081 Cedex Strasbourg, France
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2
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Tian J, Zhang X, Liu S, Li Z. Chromium Complexes Supported by NNO-Tridentate Ligands: An Unprecedent Activity with the Low Requirement of MAO. Polym Chem 2022. [DOI: 10.1039/d2py00125j] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of metal catalysts with high activity and thermal stability but low requirement of MAO as cocatalyst is highly desired for polyolefin industrial application. In this contribution, a series...
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3
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He F, Gourlaouen C, Pang H, Braunstein P. Imidazolium salts and [Pt(cod) 2]: from NHC hydrido complexes to the unprecedented olefinic tetrahedral cluster [Pt 4(μ-H)(cod) 4]BF 4. Chem Commun (Camb) 2021; 57:10039-10042. [PMID: 34505595 DOI: 10.1039/d1cc03673d] [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
Whereas the bis(imine)imidazolium salt 1·Cl is a potential precursor to a NimineCNHCNimine pincer-type ligand, it reacted with [Pt(cod)2] to give the PtII NHC hydrido complex 3, in which chloride coordination and CNHCNimine chelation is preferred over pincer formation. Unexpectedly, reaction of 1·BF4 with [Pt(cod)2] afforded the unprecedented, 56 CVE tetrahedral cluster [Pt4(μ-H)(cod)4]BF4 (7), which was fully characterized. Imidazolium salts are ubiquitous sources of the much studied NHC ligands and not expected to lead to the formation of metal clusters.
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Affiliation(s)
- Fengkai He
- School of Chemistry and Chemical Engineering, Yangzhou University Yangzhou, Jiangsu, 225009, P. R. China.,Université de Strasbourg, CNRS, Institut de Chimie UMR 7177, Strasbourg 67081, Cedex, France
| | - Christophe Gourlaouen
- Université de Strasbourg, CNRS, Institut de Chimie UMR 7177, Laboratoire de Chimie Quantique, 1 rue Blaise Pascal, Strasbourg 67081, Cedex, France
| | - Huan Pang
- School of Chemistry and Chemical Engineering, Yangzhou University Yangzhou, Jiangsu, 225009, P. R. China
| | - Pierre Braunstein
- Université de Strasbourg, CNRS, Institut de Chimie UMR 7177, Strasbourg 67081, Cedex, France
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4
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Keske EC, Sattler MO, Lough AJ, Morris RH. Tridentate NPN Ligands with a Central Secondary Phosphine Oxide Donor and their Corresponding Metal Complexes. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Eric C. Keske
- Department of Chemistry University of Toronto 80 Saint George St. Toronto, Ontario M4K 3Y1 Canada
- Chemistry Department Trent University 1600 West Bank Drive Peterborough, Ontario K9L 0G2 Canada
| | - Madeleine O. Sattler
- Department of Chemistry University of Toronto 80 Saint George St. Toronto, Ontario M4K 3Y1 Canada
| | - Alan J. Lough
- Department of Chemistry University of Toronto 80 Saint George St. Toronto, Ontario M4K 3Y1 Canada
| | - Robert H. Morris
- Department of Chemistry University of Toronto 80 Saint George St. Toronto, Ontario M4K 3Y1 Canada
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5
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Zheng Q, Zheng D, Han B, Liu S, Li Z. Chromium complexes supported by the bidentate PN ligands: synthesis, characterization and application for ethylene polymerization. Dalton Trans 2018; 47:13459-13465. [PMID: 30183787 DOI: 10.1039/c8dt02834f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Chromium-based complexes are among the most important catalysts in the field of ethylene polymerization and oligomerization. Heterogeneous Cr Phillips catalysts account for more than one-third of the commercialized high density polyethylene (HDPE). In this contribution, chromium complexes, LCrCl3 (Cr1-Cr4: L = 2,6-R1-4-R2-C6H2-N[double bond, length as m-dash]CH-C6H4-2-PPh2; Cr1: R1 = H, R2 = H; Cr2: R1 = Me, R2 = H; Cr3: R1 = iPr, R2 = H; Cr4: R1 = Ph2CH, R2 = iPr), have been synthesized and characterized by elemental analysis, ESI and IR spectroscopy. The molecular structures of Cr3 and Cr4 are defined by X-ray diffraction, revealing a distorted octahedral geometry around the chromium center in both structures. In the presence of an aluminum cocatalyst, complexes Cr1-Cr4 show moderate to high activities toward ethylene polymerization. The nature of the catalysts and various reaction conditions, such as the nature and the amount of cocatalyst, reaction time and temperature, are investigated in detail. The results show that the title complexes have good thermal stability and the substituents on the ligands significantly affect the catalytic properties. Particularly, complex Cr4 can produce HDPE with a high molecular weight up to 68.3 × 104 g mol-1 due to the suppression of the chain transfer/termination by the introduction of bulky Ph2CH groups.
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Affiliation(s)
- Quande Zheng
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department; College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
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6
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Malysheva SF, Belogorlova NA, Kuimov VA, Litvintsev YI, Sterkhova IV, Albanov AI, Gusarova NK, Trofimov BA. PCl 3 - and organometallic-free synthesis of tris(2-picolyl)phosphine oxide from elemental phosphorus and 2-(chloromethyl)pyridine hydrochloride. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.01.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Hettstedt C, Unglert M, Mayer RJ, Frank A, Karaghiosoff K. Methoxyphenyl Substituted Bis(picolyl)phosphines and Phosphine Oxides. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600032] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Christina Hettstedt
- Department of Chemistry, Ludwig‐Maximilians University (LMU), Butenandtstrasse 5–13 (Haus D), 81377 Munich, Germany, http://www.cup.uni‐muenchen.de
| | - Martin Unglert
- Department of Chemistry, Ludwig‐Maximilians University (LMU), Butenandtstrasse 5–13 (Haus D), 81377 Munich, Germany, http://www.cup.uni‐muenchen.de
| | - Robert J. Mayer
- Department of Chemistry, Ludwig‐Maximilians University (LMU), Butenandtstrasse 5–13 (Haus D), 81377 Munich, Germany, http://www.cup.uni‐muenchen.de
| | - Anna Frank
- Max‐Planck‐Institut für Eisenforschung, Max‐Planck‐Str. 1, 40237 Düsseldorf, Germany, http://www.mpie.de/
| | - Konstantin Karaghiosoff
- Department of Chemistry, Ludwig‐Maximilians University (LMU), Butenandtstrasse 5–13 (Haus D), 81377 Munich, Germany, http://www.cup.uni‐muenchen.de
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Ali F, Saha S, Maity A, Taye N, Si MK, Suresh E, Ganguly B, Chattopadhyay S, Das A. Specific Reagent for Cr(III): Imaging Cellular Uptake of Cr(III) in Hct116 Cells and Theoretical Rationalization. J Phys Chem B 2015; 119:13018-26. [DOI: 10.1021/acs.jpcb.5b07565] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Firoj Ali
- Organic
Chemistry Division, CSIR-National Chemical Laboratory, Pune, Maharashtra 411008, India
| | - Sukdeb Saha
- Analytical Science and Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat 364002, India
| | - Arunava Maity
- Organic
Chemistry Division, CSIR-National Chemical Laboratory, Pune, Maharashtra 411008, India
| | - Nandaraj Taye
- Chromatin
and Disease Biology Lab, National Centre for Cell Science, Pune 411007, India
| | - Mrinal Kanti Si
- Analytical Science and Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat 364002, India
| | - E. Suresh
- Analytical Science and Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat 364002, India
| | - Bishwajit Ganguly
- Analytical Science and Centralized Instrument Facility, CSIR-Central Salt & Marine Chemicals Research Institute, Bhavnagar, Gujarat 364002, India
| | - Samit Chattopadhyay
- Chromatin
and Disease Biology Lab, National Centre for Cell Science, Pune 411007, India
| | - Amitava Das
- Organic
Chemistry Division, CSIR-National Chemical Laboratory, Pune, Maharashtra 411008, India
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Bender R, Welter R, Braunstein P. Phosphanido-bridged triangular platinum clusters as versatile platforms: A personal account. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2014.07.079] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Jin G, Vendier L, Coppel Y, Sabo-Etienne S, Bontemps S. Three bonding modes of bis(2-picolyl)phenylphosphine at iron: isolation of a dinuclear iron complex featuring dearomatized pyridine moieties. Dalton Trans 2015; 44:7500-5. [DOI: 10.1039/c5dt00537j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three iron complexes displaying different coordination modes of the NPN ligand were isolated, including one dinuclear compound featuring dearomatized pyridine moieties.
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Affiliation(s)
- G. Jin
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - L. Vendier
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - Y. Coppel
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - S. Sabo-Etienne
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
| | - S. Bontemps
- CNRS
- LCC (Laboratoire de Chimie de Coordination)
- F-31077 Toulouse Cedex 4
- France
- Université de Toulouse
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11
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Sousa-Pedrares A, Durán-Carril ML, Romero J, García-Vázquez JA, Sousa A. Synthesis and characterization of homoleptic chromium(III) complexes containing pyridine-2-thionato ligands and of the co-crystal (1:1) bis(pyridine-2-thionato)(pyridine-2-dithionato) chromium(III) tris(pyridine-2-thionato) chromium(III). Polyhedron 2013. [DOI: 10.1016/j.poly.2013.06.048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Whiteoak CJ, Nobbs JD, Kiryushchenkov E, Pagano S, White AJP, Britovsek GJP. Tri(pyridylmethyl)phosphine: the elusive congener of TPA shows surprisingly different coordination behavior. Inorg Chem 2013; 52:7000-9. [PMID: 23701515 DOI: 10.1021/ic4005196] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Tri(pyridylmethyl)phosphine (TPPh), the remarkably elusive congener of tri(pyridylmethyl)amine (TPA), has been prepared, as well as the relative tri(N-methyl-pyridylamino)phosphine (TPAMP). The coordination properties of these new ligands have been evaluated for chromium(III), iron(II), and ruthenium(II) complexes and compared with the related TPA complexes. In all cases, a different coordination behavior has been observed whereby TPPh and TPAMP always act as tridentate ligands. A chromium(III) complex [Cr(TPPh)Cl3] has been prepared, which has shown low ethylene oligomerization activity. Octahedral low spin iron(II) complexes [Fe(TPPh)2](2+) and [Fe(TPAMP)2](2+) were obtained with two ligands bound to the metal center. Ruthenium(II) chloro complexes of TPA and TPPh undergo ligand exchange reactions in acetonitrile, and the ruthenium(II) complex [Ru(MeCN)2(TPA)](2+) can be oxidized by m-CPBA in acetonitrile to give a transient ruthenium(IV) oxo complex [Ru(O)(MeCN)(TPA)](2+). Attempts to generate high valent ruthenium(IV) oxo TPPh or TPAMP complexes could not be achieved, probably due to insufficient stabilization by these strong field ligands.
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Affiliation(s)
- Christopher J Whiteoak
- Department of Chemistry, Imperial College London, Exhibition Road, London SW7 2AY, United Kingdom
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Mednikov EG, Dahl LF. How innocent is thallium(i)? Corrected formulations of [Tl2Pd14(CO)9(PMe3)11][PF6]2 and [TlPd9(CO)9(PPh3)6][PF6] clusters previously reported as corresponding Au2Pd14 and AuPd9 clusters. Chem Commun (Camb) 2013; 49:1085-7. [DOI: 10.1039/c2cc37959g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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14
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Wang D, Liu S, Zeng Y, Sun WH, Redshaw C. 2-Benzimidazolyl-N-phenylquinoline-8-carboxamide Chromium(III) Trichlorides: Synthesis and Application for Ethylene Oligomerization and Polymerization. Organometallics 2011. [DOI: 10.1021/om2001124] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Liu S, Pattacini R, Braunstein P. Reactions between an Ethylene Oligomerization Chromium(III) Precatalyst and Aluminum-Based Activators: Alkyl and Cationic Complexes with a Tridentate NPN Ligand. Organometallics 2011. [DOI: 10.1021/om200243a] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Shaofeng Liu
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, CS 90032, F-67081 Strasbourg Cedex, France
- Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Roberto Pattacini
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, CS 90032, F-67081 Strasbourg Cedex, France
| | - Pierre Braunstein
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, CS 90032, F-67081 Strasbourg Cedex, France
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