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Collins Rice C, Hayden JA, Hawkins AD, Morris LJ, Turner ZR, Buffet JC, O’Hare D. Trends in Structure and Ethylene Polymerization Reactivity of Transition-Metal Permethylindenyl-phenoxy (PHENI*) Complexes. Organometallics 2024; 43:540-556. [PMID: 38425384 PMCID: PMC10900520 DOI: 10.1021/acs.organomet.3c00503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 01/24/2024] [Accepted: 01/24/2024] [Indexed: 03/02/2024]
Abstract
A family of ansa-permethylindenyl-phenoxy (PHENI*) transition-metal chloride complexes has been synthesized and characterized (1-7; {(η5-C9Me6)Me(R″)Si(2-R-4-R'-C6H2O)}MCl2; R,R' = Me, tBu, Cumyl (CMe2Ph); R″ = Me, nPr, Ph; M = Ti, Zr, Hf). The ancillary chloride ligands could readily be exchanged with halides, alkyls, alkoxides, aryloxides, or amides to form PHENI* complexes [L]TiX2 (8-17; X = Br, I, Me, CH2SiMe3, CH2Ph, NMe2, OEt, ODipp). The solid-state crystal structures of these PHENI* complexes indicate that one of two conformations may be preferred, parametrized by a characteristic torsion angle (TA'), in which the η5 system is either disposed away from the metal center or toward it. Compared to indenyl PHENICS complexes, the permethylindenyl (I*) ligand appears to favor a conformation in which the metal center is more accessible. When heterogenized on solid polymethylaluminoxane (sMAO), titanium PHENI* complexes exhibit exceptional catalytic activity toward the polymerization of ethylene. Substantially greater activities are reported than for comparable PHENICS catalysts, along with the formation of ultrahigh-molecular-weight polyethylenes (UHMWPE). Catalyst-cocatalyst ion pairing effects are observed in cationization experiments and found to be significant in homogeneous catalytic regimes; these effects are also related to the influence of the ancillary ligand leaving groups in slurry-phase polymerizations. Catalytic efficiency and polyethylene molecular weight are found to increase with pressure, and PHENI* catalysts can be categorized as being among the most active for the controlled synthesis of UHMWPE.
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Affiliation(s)
- Clement
G. Collins Rice
- Chemistry Research Laboratory, Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
| | - Justin A. Hayden
- Chemistry Research Laboratory, Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
| | - Adam D. Hawkins
- Chemistry Research Laboratory, Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
| | - Louis J. Morris
- Chemistry Research Laboratory, Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
| | - Zoë R. Turner
- Chemistry Research Laboratory, Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
| | - Jean-Charles Buffet
- Chemistry Research Laboratory, Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
| | - Dermot O’Hare
- Chemistry Research Laboratory, Department
of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K.
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2
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Giffin KA, Cirriez V, Santoro O, Welle A, Kirillov E, Carpentier JF. Meso- and Rac-[bis(3-phenyl-6- tert-butylinden-1-yl)dimethylsilyl]zirconium Dichloride: Precatalysts for the Production of Differentiated Polyethylene Products with Enhanced Properties. Polymers (Basel) 2022; 14:polym14112217. [PMID: 35683890 PMCID: PMC9183169 DOI: 10.3390/polym14112217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 05/26/2022] [Accepted: 05/27/2022] [Indexed: 02/05/2023] Open
Abstract
Ansa-zirconocene complexes are widely employed as precatalysts for olefin polymerization. Their synthesis generally leads to mixtures of their rac and meso isomers, whose separation is often problematic. In this contribution, we report on the synthesis of a novel silyl-bridged bis(indenyl)-based metallocene, and on the separation of its rac and meso isomers by simple recrystallization from toluene. The two complexes, activated by methylaluminoxane (MAO), have been used as precatalysts in ethylene/1-hexene copolymerization. Regardless of the reaction conditions, the meso complex outperformed its rac congener. A similar trend was observed by performing the process in the presence of the silica-supported versions of the complexes. This is remarkable, since meso metallocenes generally display lower activities than their rac analogues. Furthermore, the meso isomer generates polymer products that are more in line with the targets for the preparation of a bimodal PE grade made of a lower-MW high-density (HDPE) fraction and a higher-MW linear low-density (LLDPE) fraction.
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Affiliation(s)
- Kaitie A. Giffin
- Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), University of Rennes, UMR 6226, F-35042 Rennes, France; (K.A.G.); (O.S.)
- Total Energies One Tech Belgium, Zone Industrielle Feluy C, B-7181 Seneffe, Belgium; (V.C.); (A.W.)
| | - Virginie Cirriez
- Total Energies One Tech Belgium, Zone Industrielle Feluy C, B-7181 Seneffe, Belgium; (V.C.); (A.W.)
| | - Orlando Santoro
- Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), University of Rennes, UMR 6226, F-35042 Rennes, France; (K.A.G.); (O.S.)
| | - Alexandre Welle
- Total Energies One Tech Belgium, Zone Industrielle Feluy C, B-7181 Seneffe, Belgium; (V.C.); (A.W.)
| | - Evgueni Kirillov
- Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), University of Rennes, UMR 6226, F-35042 Rennes, France; (K.A.G.); (O.S.)
- Correspondence: (E.K.); (J.-F.C.)
| | - Jean-François Carpentier
- Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), University of Rennes, UMR 6226, F-35042 Rennes, France; (K.A.G.); (O.S.)
- Correspondence: (E.K.); (J.-F.C.)
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3
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Asim W, Waheeb AS, Awad MA, Kadhum AM, Ali A, Mallah SH, Iqbal MA, Kadhim MM. Recent advances in the synthesis of zirconium complexes and their catalytic applications. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131925] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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4
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Collins Rice CG, Buffet JC, Turner ZR, O'Hare D. Efficient synthesis of thermoplastic elastomeric amorphous ultra-high molecular weight atactic polypropylene (UHMWaPP). Polym Chem 2022. [DOI: 10.1039/d2py00708h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of amorphous ultra-high molecular weight atactic polypropylene (UHMWaPP), with molecular weights (Mw) up to 2.0 MDa and narrow polydispersities is reported using remarkably efficient permethylindenyl-phenoxy (PHENI*) titanium complexes.
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Affiliation(s)
- Clement G. Collins Rice
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Jean-Charles Buffet
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Zoë R. Turner
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Dermot O'Hare
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
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5
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Mena M, Pérez-Redondo A, Varela-Izquierdo V, Yélamos C. X-Ray Crystal Structures of Two Monopentamethylcyclopentadienylhafnium(IV) Complexes. CRYSTALLOGR REP+ 2021. [DOI: 10.1134/s1063774521030184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Shahid M, Abbasi M, Yaqoob M, Haque RA, Iqbal MA. Techniques in the synthesis of organometallic compounds of Hafnium. REV INORG CHEM 2021. [DOI: 10.1515/revic-2020-0027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Abstract
Hafnium is a transition metal and it is the 45th most abundant transition element present on the earth. Hafnium has been successfully alloyed with several metals including titanium, iron, and niobium. Hafnium complexes are less active olefin polymerization catalysts. In the current review synthesis of hafnium complexes involving bonding through different linkages like “carbon, nitrogen, oxygen, carbon and oxygen, nitrogen and cobalt nitrogen and oxygen, nitrogen and phosphorus, nitrogen and sulfur, phosphorus and carbon, phosphorus and oxygen, sulfur carbon and oxygen, carbon–nitrogen and oxygen, carbon–nitrogen and phosphorus, carbon–nitrogen oxygen, sulfur and phosphorus, carbon–oxygen phosphorus and nitrogen”. The commonly used solvents for the synthesis of Hafnium complexes are tetrahydrofuran, n-hexane, and toluene, etc. These complexes were mostly reported at different temperatures ranges from −35 to 110 °C with continuous stirring, according to the nature of ligands. An overview of techniques in the synthesis of Hafnium complexes through various routes has been compiled.
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Affiliation(s)
- Meeshar Shahid
- Department of Chemistry , University of Agriculture Faisalabad , 38040 Faisalabad , Pakistan
| | - Mahvish Abbasi
- Department of Chemistry , University of Agriculture Faisalabad , 38040 Faisalabad , Pakistan
- Organometallic & Coordination Chemistry Laboratory, University of Agriculture Faisalabad , 38040 Faisalabad , Pakistan
| | - Munazzah Yaqoob
- Department of Chemistry , University of Agriculture Faisalabad , 38040 Faisalabad , Pakistan
- Organometallic & Coordination Chemistry Laboratory, University of Agriculture Faisalabad , 38040 Faisalabad , Pakistan
| | - Rosenani A. Haque
- School of Chemical Sciences, Universiti Sains Malaysia , 11800 USM , Penang , Malaysia
| | - Muhammad Adnan Iqbal
- Department of Chemistry , University of Agriculture Faisalabad , 38040 Faisalabad , Pakistan
- Organometallic & Coordination Chemistry Laboratory, University of Agriculture Faisalabad , 38040 Faisalabad , Pakistan
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7
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Group 4 constrained geometry complexes for olefin (co)polymerisation. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110872] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Lamb JV, Abell JC, McLaren JE, Buffet JC, Turner ZR, O'Hare D. Slurry-phase ethylene polymerisation using group 4 ansa-bridged permethylindenyl complexes supported on polymethylaluminoxane. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2019.110735] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Bau MA, Wiesler S, Younas SL, Streuff J. Strategies for the Synthesis of Chiral Carbon-Bridged Group IV ansa-Metallocenes. Chemistry 2019; 25:10531-10545. [PMID: 31059590 DOI: 10.1002/chem.201901505] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Indexed: 12/13/2022]
Abstract
This minireview provides a survey of the various synthetic approaches to chiral ansa-metallocenes of Ti, Zr, and Hf containing a carbon-based bridge. The individual strategies to install substitution patterns at either the cyclopentadienyl framework or the bridging unit are highlighted with focus on the progress made towards a direct preparation of single complex stereoisomers. The review further includes the discussion of potential problems such as the formation of undesired diastereomers, the threat of racemization of enantiopure material, and synthetic challenges originating from the synthesis, purification, and isolation of the target complexes. The review has been written with the goal in mind to facilitate the design and synthesis of new chiral ansa-metallocene derivatives for emerging research areas in asymmetric catalysis and organometallic chemistry.
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Affiliation(s)
- Michael A Bau
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, 79104, Freiburg im Breisgau, Germany
| | - Stefan Wiesler
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, 79104, Freiburg im Breisgau, Germany
| | - Sara L Younas
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, 79104, Freiburg im Breisgau, Germany
| | - Jan Streuff
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstraße 21, 79104, Freiburg im Breisgau, Germany
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10
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Lamb JV, Buffet JC, Turner ZR, O'Hare D. Group 4 permethylindenyl complexes for slurry-phase polymerisation of ethylene. Polym Chem 2019. [DOI: 10.1039/c8py01796d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Supported group 4 permethylindenyl based catalysts displayed extremely high ethylene polymerisation activity affording popcorn shaped low molecular weights polyethylenes.
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Affiliation(s)
- Jessica V. Lamb
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Jean-Charles Buffet
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Zoë R. Turner
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Dermot O'Hare
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
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11
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Buffet JC, Turner ZR, O'Hare D. Popcorn-shaped polyethylene synthesised using highly active supported permethylindenyl metallocene catalyst systems. Chem Commun (Camb) 2018; 54:10970-10973. [PMID: 30206626 DOI: 10.1039/c8cc05350b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unsymmetrical permethylindenyl bent metallocene complexes have been synthesised and reacted with inorganic solid supports to afford catalysts for the slurry phase polymerisation of ethylene. Those supported on solid polymethylaluminoxane were both highly active catalysts and afforded polymers with a desirable, low aggregation, "popcorn" morphology.
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Affiliation(s)
- Jean-Charles Buffet
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.
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12
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Zhang J, Motta A, Gao Y, Stalzer MM, Delferro M, Liu B, Lohr TL, Marks TJ. Cationic Pyridylamido Adsorbate on Brønsted Acidic Sulfated Zirconia: A Molecular Supported Organohafnium Catalyst for Olefin Homo- and Co-Polymerization. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00611] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Jialong Zhang
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Alessandro Motta
- Dipartimento di Scienze Chimiche, Università di Roma “La Sapienza” and INSTM, UdR Roma, I-00185 Roma, Italy
| | - Yanshan Gao
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Madelyn Marie Stalzer
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Massimiliano Delferro
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Boping Liu
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Tracy L. Lohr
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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13
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Williams TJ, Buffet JC, Turner ZR, O'Hare D. Group 4 permethylindenyl constrained geometry complexes for ethylene polymerisation catalysis. Catal Sci Technol 2018. [DOI: 10.1039/c8cy01374h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The synthesis and characterisation of six permethylindenyl constrained geometry complexes is reported. Slurry phase ethylene polymerisation studies demonstrate that activities increase with increasing electron donating character of the amido fragment.
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Affiliation(s)
- Thomas J. Williams
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford OX1 3TA
- UK
| | - Jean-Charles Buffet
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford OX1 3TA
- UK
| | - Zoë R. Turner
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford OX1 3TA
- UK
| | - Dermot O'Hare
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford OX1 3TA
- UK
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14
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15
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Fraser DAX, Turner ZR, Buffet JC, O’Hare D. Titanium and Zirconium Permethylpentalene Complexes, Pn*MCpRX, as Ethylene Polymerization Catalysts. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00417] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Duncan A. X. Fraser
- Chemistry Research Laboratory,
Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Zoë R. Turner
- Chemistry Research Laboratory,
Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Jean-Charles Buffet
- Chemistry Research Laboratory,
Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Dermot O’Hare
- Chemistry Research Laboratory,
Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, U.K
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16
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Synthesis, characterisation, and polymerisation studies of hexamethylindenyl zirconocenes and hafnocenes. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.01.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Bravo I, Alonso-Moreno C, Carrillo-Hermosilla F, López-Solera I, Antiñolo A, Albaladejo J. Toward the Prediction of Activity in the Ethylene Polymerisation of ansa-Bis(indenyl) Zirconocenes: Effect of the Stereochemistry and Hydrogenation of the Indenyl Moiety. Chempluschem 2015; 80:963-972. [PMID: 31973254 DOI: 10.1002/cplu.201500008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Indexed: 11/06/2022]
Abstract
A combined experimental and quantum chemical study has been performed on rac- and meso-[Zr{1-Me2 Si(3-η5 -C9 H5 Et)2 }Cl2 ] (rac- and meso-1) and their hydrogenated forms (rac- and meso-2) to understand ligand effects and guide ligand design for more active ansa-bis(indenyl) zirconocenes for the polymerisation of ethylene. The rac-ansa-zirconocene rac-[Zr(1-Me2 Si{3-Et-(η5 -C9 H9 )}2 )Cl2 ] (rac-2) has been prepared and fully characterised by NMR spectroscopy and elemental analysis. The molecular structure of rac-2 has also been determined by single-crystal XRD. The behaviour of the catalysts was analysed in the polymerisation of ethylene and higher activities were obtained for rac-1 and its hydrogenated form rac-2. The influence of the stereochemistry and hydrogenation of the indenyl ligand on the experimental activities has been evaluated by computational studies. The differences along the reaction pathway are dominated by changes in the relative stabilities of the catalytic intermediates. A hybrid density functional B3LYP study, in the presence of toluene as the solvent, indicates that the rac forms give rise to more active species than their meso counterparts. The hydrogenation of the rac forms is a very promising approach to increase activities in polymerisation, in contrast to the meso forms. Finally, the global mechanism rate constants for the polymerisation reaction for each metallocene were calculated by using the thermodynamic formulation of transition-state theory to complement the computational study.
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Affiliation(s)
- Iván Bravo
- Facultad de Farmacia, Departamento de Química-Física, Universidad de Castilla-La Mancha, Campus de Albacete, Edificio Polivalente, s/n, 02071 Albacete (Spain)
| | - Carlos Alonso-Moreno
- Facultad de Farmacia, Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus de Albacete, Edificio Polivalente, s/n, 02071 Albacete (Spain)
| | - Fernando Carrillo-Hermosilla
- Facultad de Ciencias y Tecnologías Químicas, Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus de Ciudad Real, 13071 Ciudad Real (Spain)
| | - Isabel López-Solera
- Facultad de Ciencias y Tecnologías Químicas, Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus de Ciudad Real, 13071 Ciudad Real (Spain)
| | - Antonio Antiñolo
- Facultad de Ciencias y Tecnologías Químicas, Departamento de Química Inorgánica, Orgánica y Bioquímica, Universidad de Castilla-La Mancha, Campus de Ciudad Real, 13071 Ciudad Real (Spain)
| | - José Albaladejo
- Facultad de Ciencias y Tecnologías Químicas, Departamento de Química-Física, Universidad de Castilla-La Mancha, Campus de Ciudad Real, 13071 Ciudad Real (Spain)
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18
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Buffet JC, Arnold TAQ, Turner ZR, Angpanitcharoen P, O'Hare D. Synthesis and characterisation of permethylindenyl zirconium complexes and their use in ethylene polymerisation. RSC Adv 2015. [DOI: 10.1039/c5ra20465h] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report here the synthesis, characterisation and use in solution and slurry phase ethylene polymerisation of new group 4 permethylindenyl complexes.
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Affiliation(s)
- Jean-Charles Buffet
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Thomas A. Q. Arnold
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | - Zoë R. Turner
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
| | | | - Dermot O'Hare
- Chemistry Research Laboratory
- Department of Chemistry
- University of Oxford
- Oxford
- UK
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Sigaeva NN, Friesen AK, Nasibullin II, Ermolaev NL, Kolesov SV. Metallocene catalysis in the complex-radical polymerization of methyl methacrylate. KINETICS AND CATALYSIS 2012. [DOI: 10.1134/s0023158412040118] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sigaeva NN, Friesen AK, Nasibullin II, Ermolaev NL, Kolesov SV. Initiation of complex-radical polymerization of methyl methacrylate in the presence of metallocenes. POLYMER SCIENCE SERIES B 2012. [DOI: 10.1134/s1560090412040057] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Ransom P, Arnold TAQ, Thompson AL, Buffet JC, O'Hare D. Synthesis and characterisation of the ethylene bridged permethylindenyl cerium complex [(EBI*)CeI(THF)]. Dalton Trans 2012; 41:11267-9. [DOI: 10.1039/c2dt31439h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Setty VN, Zhou W, Foxman BM, Thomas CM. Subtle Differences Between Zr and Hf in Early/Late Heterobimetallic Complexes with Cobalt. Inorg Chem 2011; 50:4647-55. [DOI: 10.1021/ic200445x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Vinay N. Setty
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Wen Zhou
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Bruce M. Foxman
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
| | - Christine M. Thomas
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454, United States
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