1
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D'Anania O, Romano E, Barone V, Talarico G. Predicting the propene stereoselectivity on transition metal catalysts: A daunting task for density functional theory. J Comput Chem 2024; 45:1483-1492. [PMID: 38470153 DOI: 10.1002/jcc.27343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 02/13/2024] [Accepted: 02/22/2024] [Indexed: 03/13/2024]
Abstract
Thanks to recent developments in hardware and software, quantum chemical methods are increasingly used for interpreting the complex mechanisms underlying polymerization reaction by homogeneous catalysis. Unfortunately, the dimensions of even the smallest realistic models are too large to permit the use of state-of-the-art composite wave function methods. Under these circumstances, density functional theory still offers the best compromise between cost and accuracy. However, comprehensive benchmarks of different functionals are not yet available for this important research field. The main aim of the present paper is to fill this gap by performing an unbiased comparison of several density functionals and continuum solvent models for the stereo-control in the propylene polymerization on prototypical catalysts inducing different reaction mechanisms. While it was not possible to define a unique computational protocol providing the best results in all the situations, the B3PW91 functional in conjunction with D3 empirical dispersions and the solvent model density solvent model performs remarkably well for three out of the four investigated catalysts. Under such circumstances, it is recommended to compare the results delivered by different models when approaching additional classes of catalysts.
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Affiliation(s)
- Olga D'Anania
- Scuola Superiore Meridionale, Napoli, Italy
- Scuola Normale Superiore, Pisa, Italy
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, Napoli, Italy
| | - Eugenio Romano
- Scuola Superiore Meridionale, Napoli, Italy
- Scuola Normale Superiore, Pisa, Italy
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, Napoli, Italy
| | | | - Giovanni Talarico
- Scuola Superiore Meridionale, Napoli, Italy
- Dipartimento di Scienze Chimiche, Università degli Studi di Napoli Federico II, Napoli, Italy
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2
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Kulyabin PS, Sharikov MI, Izmer VV, Kononovich DS, Goryunov GP, Alexeev NV, Uborsky DV, Vittoria A, Antinucci G, Ehm C, Budzelaar PHM, Cipullo R, Busico V, Voskoboynikov AZ. Triptycene as a scaffold in metallocene catalyzed olefin polymerization. Dalton Trans 2024; 53:9516-9525. [PMID: 38767874 DOI: 10.1039/d4dt01170h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
A set of metallocene olefin polymerization catalysts bearing triptycene moieties in either position 4-5 (complexes Ty1-Ty5) or in position 5-6 (complexes Ty6-Ty8) of the basic dimethylsilyl-bridged bis(indenyl) system has been tested in propene polymerization and in ethene/1-hexene copolymerization. Comparison of the results with QSPR (quantitative structure-property relationship) predictions not parametrized for these exotic ligand variations demonstrates that trends can still be identified by extrapolation. Interestingly, Ty7, upon suitable activation, provides a highly isotactic polypropylene with an exceptional amount of 2,1 regio-errors (8%). The previously developed QSPR type models successfully predicted the low regioselectivity of this catalyst, despite the fact that the catalyst structure differs significantly from the benchmark set.
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Affiliation(s)
- Pavel S Kulyabin
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Mikhail I Sharikov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Vyatcheslav V Izmer
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Dmitry S Kononovich
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Georgy P Goryunov
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Nikita V Alexeev
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Dmitry V Uborsky
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia.
| | - Antonio Vittoria
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, 80126 Napoli, Italy.
| | - Giuseppe Antinucci
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, 80126 Napoli, Italy.
| | - Christian Ehm
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, 80126 Napoli, Italy.
| | - Peter H M Budzelaar
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, 80126 Napoli, Italy.
| | - Roberta Cipullo
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, 80126 Napoli, Italy.
| | - Vincenzo Busico
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, 80126 Napoli, Italy.
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3
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Antinucci G, Dereli B, Vittoria A, Budzelaar PHM, Cipullo R, Goryunov GP, Kulyabin PS, Uborsky DV, Cavallo L, Ehm C, Voskoboynikov AZ, Busico V. Selection of Low-Dimensional 3-D Geometric Descriptors for Accurate Enantioselectivity Prediction. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00976] [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)
- Giuseppe Antinucci
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- DPI, P.O.
Box 902, 5600 AX Eindhoven, the Netherlands
| | - Busra Dereli
- Catalysis Research Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia
| | - Antonio Vittoria
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- DPI, P.O.
Box 902, 5600 AX Eindhoven, the Netherlands
| | - Peter H. M. Budzelaar
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- DPI, P.O.
Box 902, 5600 AX Eindhoven, the Netherlands
| | - Roberta Cipullo
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- DPI, P.O.
Box 902, 5600 AX Eindhoven, the Netherlands
| | - Georgy P. Goryunov
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
- DPI, P.O.
Box 902, 5600 AX Eindhoven, the Netherlands
| | - Pavel S. Kulyabin
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
- DPI, P.O.
Box 902, 5600 AX Eindhoven, the Netherlands
| | - Dmitry V. Uborsky
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
- DPI, P.O.
Box 902, 5600 AX Eindhoven, the Netherlands
| | - Luigi Cavallo
- Catalysis Research Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955, Saudi Arabia
| | - Christian Ehm
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- DPI, P.O.
Box 902, 5600 AX Eindhoven, the Netherlands
| | - Alexander Z. Voskoboynikov
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
- DPI, P.O.
Box 902, 5600 AX Eindhoven, the Netherlands
| | - Vincenzo Busico
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- DPI, P.O.
Box 902, 5600 AX Eindhoven, the Netherlands
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4
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Kirillov E, Carpentier JF. {Cyclopentadienyl/Fluorenyl}-Group 4 ansa-Metallocene Catalysts for Production of Tailor-Made Polyolefins. CHEM REC 2020; 21:357-375. [PMID: 33332719 DOI: 10.1002/tcr.202000142] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/28/2020] [Accepted: 11/30/2020] [Indexed: 11/10/2022]
Abstract
The development of new metallocene-based polymerization catalysts and innovative processes derived thereof still constitutes a challenge for the manufacturing of polyolefinic materials with tailored properties (e. g. particular microstructure or topology, ultra-high molecular weight, high melting transition, and their combinations) for contemporary commercial applications. This personal account summarizes our continuing endeavors to advance the family of industry-relevant stereoselective propylene polymerization catalysts based on C1 -symmetric group 4 ansa-metallocenes incorporating multi-substituted fluorenyl-cyclopentadienyl {Cp/Flu} ligands. Within the framework of this project, valuable structural and catalytic data, harvested both for neutral metallocenes and for metallocenium ion-pairs, have been used for rational design of more efficient catalytic systems, reluctant towards side reactions, and for providing new stereoregular value-added polymer materials.
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Affiliation(s)
- Evgueni Kirillov
- UMR 6226 CNRS - Univ Rennnes, Organometallics: Materials & Catalysis Institut des Sciences Chimiques de Rennes (ISCR), Campus de Beaulieu, F-35042, Rennes, France
| | - Jean-François Carpentier
- UMR 6226 CNRS - Univ Rennnes, Organometallics: Materials & Catalysis Institut des Sciences Chimiques de Rennes (ISCR), Campus de Beaulieu, F-35042, Rennes, France
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5
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Ehm C, Mingione A, Vittoria A, Zaccaria F, Cipullo R, Busico V. High-Throughput Experimentation in Olefin Polymerization Catalysis: Facing the Challenges of Miniaturization. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02549] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Christian Ehm
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | | | - Antonio Vittoria
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Francesco Zaccaria
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Roberta Cipullo
- HTExplore s.r.l., Via R. Morandi 12, 80124 Napoli, Italy
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Vincenzo Busico
- HTExplore s.r.l., Via R. Morandi 12, 80124 Napoli, Italy
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
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6
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Izmer VV, Lebedev AY, Kononovich DS, Borisov IS, Kulyabin PS, Goryunov GP, Uborsky DV, Canich JAM, Voskoboynikov AZ. ansa-Metallocenes Bearing 4-(N-Azolyl)-2-methylindenyl and Related Ligands: Development of Highly Isoselective Catalysts for Propene Polymerization at Higher Temperatures. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00648] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Vyatcheslav V. Izmer
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia
| | - Artem Y. Lebedev
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia
| | - Dmitry S. Kononovich
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia
| | - Ilya S. Borisov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia
| | - Pavel S. Kulyabin
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia
| | - Georgy P. Goryunov
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia
| | - Dmitry V. Uborsky
- Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119991, Russia
| | - Jo Ann M. Canich
- Baytown Technology and Engineering Complex, ExxonMobil Chemical Company, 5200 Bayway Drive, Baytown, Texas 77520, United States
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7
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Orimoto Y, Shirane S, Aoki Y. Extent of structural change during the reaction and its relationship to isoselectivity in polypropylene polymerization with ansa-zirconocene/borate catalyst: A computational study. J Comput Chem 2019; 40:2622-2635. [PMID: 31396976 DOI: 10.1002/jcc.26040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 07/17/2019] [Accepted: 07/20/2019] [Indexed: 11/07/2022]
Abstract
The mechanism of isotactic polypropylene (iPP) polymerization with an (R,R)-ansa-zirconocene/borate catalyst system was analyzed using quantum chemistry (QC) calculations by focusing on the extent of structural change during monomer insertion. The activation energy for migratory insertion, Ea , was compared for four possible reaction paths with regard to monomer coordination, that is, 1,2-re, 1,2-si, 2,1-si, and 2,1-re, until the seventh monomer insertion step, explicitly including a borate anion cocatalyst. This indicated that the 1,2-re path was most favorable, except for the first step, which favored 1,2-si. As far as the first step, the product of 1,2-si is a conformational isomer to that of the 1,2-re path, and the exceptional favorability of 1,2-si does not affect the isoselectivity. These results support previous studies, except that our results address the unexplored seventh insertion step with a borate anion cocatalyst by QC calculations. The isoselectivity correlated with the extent of structural change in the whole system during the reaction. It was proved from our detail analysis that the advantage of 1,2-re with a small Ea is attributed to its smaller structural changes due to low steric repulsion in the system compared with other paths. Conversely, larger repulsion in the systems involved in other paths results in larger structural changes to minimize the structural strain. However, the relaxation appears insufficient due to structural restriction of the enforced four-membered ring transition state structure. A borate anion cocatalyst broke the C2 symmetry of the electronic structures of zirconocene, resulting in an odd-even Ea frequency for the monomer insertion. Molecular orbital analysis demonstrated that the d-π orbital overlaps can explain the approach direction of the olefin coordination and the bent structure of zirconocene, providing a different viewpoint from previous studies. The potential for catalyst control was discussed based on our results. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Yuuichi Orimoto
- Department of Material Sciences, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Park, Fukuoka, 816-8580, Japan
| | - Satoru Shirane
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-Park, Fukuoka, 816-8580, Japan
| | - Yuriko Aoki
- Department of Material Sciences, Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-Park, Fukuoka, 816-8580, Japan.,Japan Science and Technology Agency, CREST, 4-1-8 Hon-chou, Kawaguchi, Saitama, 332-0012, Japan
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8
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Kulyabin PS, Portnyagin IA, Tsarev AN, Asachenko AF, Goryunov GP, Izmer VV, Uborsky DV, Voskoboynikov AZ, Ajellal N, Vanne T, Varzeshkhah R, Resconi L, Castro P. Ansa-zirconocenes bearing 5-NR2-6-alkyl-4-hydrocarbyl-2-methylindenyl moieties: Synthesis, structure, stereoselective polymerization of propylene. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.04.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Ehm C, Vittoria A, Goryunov GP, Kulyabin PS, Budzelaar PHM, Voskoboynikov AZ, Busico V, Uborsky DV, Cipullo R. Connection of Stereoselectivity, Regioselectivity, and Molecular Weight Capability in rac-R′2Si(2-Me-4-R-indenyl)2ZrCl2 Type Catalysts. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01546] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Christian Ehm
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, the Netherlands
| | - Antonio Vittoria
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, the Netherlands
| | - Georgy P. Goryunov
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
- DPI, P.O. Box 902, 5600 AX Eindhoven, the Netherlands
| | - Pavel S. Kulyabin
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
- DPI, P.O. Box 902, 5600 AX Eindhoven, the Netherlands
| | - Peter H. M. Budzelaar
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, the Netherlands
| | - Alexander Z. Voskoboynikov
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
- DPI, P.O. Box 902, 5600 AX Eindhoven, the Netherlands
| | - Vincenzo Busico
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, the Netherlands
| | - Dmitry V. Uborsky
- Department of Chemistry, Lomonosov Moscow State University, 1/3 Leninskie Gory, 119991 Moscow, Russia
- DPI, P.O. Box 902, 5600 AX Eindhoven, the Netherlands
| | - Roberta Cipullo
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
- DPI, P.O. Box 902, 5600 AX Eindhoven, the Netherlands
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10
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Castro L, Therukauff G, Vantomme A, Welle A, Haspeslagh L, Brusson JM, Maron L, Carpentier JF, Kirillov E. A Theoretical Outlook on the Stereoselectivity Origins of Isoselective Zirconocene Propylene Polymerization Catalysts. Chemistry 2018; 24:10784-10792. [PMID: 29717786 DOI: 10.1002/chem.201801438] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Indexed: 11/10/2022]
Abstract
The first three insertion steps of propylene for isoselective metallocenes from the one-carbon-bridged cyclopentadienyl-fluorenyl {Cp/Flu} and silicon-bridged ansa-bis(indenyl) {SBI} families were computed by using a theoretical method implementing the B3PW91 functional in combination with solvent corrections incorporated with the Solvation Model based on Density (SMD) continuum model. For C1 -symmetric {Cp/Flu}-type metallocenes, two mechanisms of stereocontrol were validated theoretically: more facile and more stereoselective chain "stationary" insertion (or site epimerization backskip) and less stereoselective alternating mechanisms. For the C2 -symmetric {SBI}-type system, the computation results were in complete agreement with the sole operating chain migratory insertion mechanism. The thermochemical data obtained through the study were used to predict microstructures of polypropylenes by using three-parameter and one-parameter statistical models for the two metallocene systems, respectively. The calculated meso/rac pentad distributions were found to be in good agreement with those determined experimentally for isotactic polypropylene samples obtained at different polymerization temperatures.
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Affiliation(s)
- Ludovic Castro
- Université de Toulouse, INSA, UPS and CNRS, LPCNO, UMR 5215, 135 avenue de Rangueil, 31077, Toulouse, France.,Univ Rennes, CNRS, ISCR-UMR 6226, F-35000, Rennes, France
| | | | - Aurelien Vantomme
- Total Research & Technology Feluy, Zone Industrielle C, 7181, Feluy, Belgium
| | - Alexandre Welle
- Total Research & Technology Feluy, Zone Industrielle C, 7181, Feluy, Belgium
| | - Luc Haspeslagh
- Total S.A., Direction Scientifique, 24 Cours Michelet, 92069, Paris, La Défense Cedex, France
| | - Jean-Michel Brusson
- Total S.A., Direction Scientifique, 24 Cours Michelet, 92069, Paris, La Défense Cedex, France
| | - Laurent Maron
- Université de Toulouse, INSA, UPS and CNRS, LPCNO, UMR 5215, 135 avenue de Rangueil, 31077, Toulouse, France
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11
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2D-aluminum-modified solids as simultaneous support and cocatalyst for in situ polymerizations of olefins. J Catal 2018. [DOI: 10.1016/j.jcat.2018.04.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Zaccaria F, Cipullo R, Budzelaar PHM, Busico V, Ehm C. Backbone rearrangement during olefin capture as the rate limiting step in molecular olefin polymerization catalysis and its effect on comonomer affinity. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28685] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Francesco Zaccaria
- Dipartimento di Scienze Chimiche; Università di Napoli Federico II; Napoli 80126 Italy
| | - Roberta Cipullo
- Dipartimento di Scienze Chimiche; Università di Napoli Federico II; Napoli 80126 Italy
| | - Peter H. M. Budzelaar
- Dipartimento di Scienze Chimiche; Università di Napoli Federico II; Napoli 80126 Italy
- Department of Chemistry; University of Manitoba; Winnipeg Manitoba Canada R3T 2N2
| | - Vincenzo Busico
- Dipartimento di Scienze Chimiche; Università di Napoli Federico II; Napoli 80126 Italy
| | - Christian Ehm
- Dipartimento di Scienze Chimiche; Università di Napoli Federico II; Napoli 80126 Italy
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13
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Zaccaria F, Ehm C, Budzelaar PHM, Busico V. Accurate Prediction of Copolymerization Statistics in Molecular Olefin Polymerization Catalysis: The Role of Entropic, Electronic, and Steric Effects in Catalyst Comonomer Affinity. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03458] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Francesco Zaccaria
- Dipartimento di
Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
| | - Christian Ehm
- Dipartimento di
Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
| | | | - Vincenzo Busico
- Dipartimento di
Scienze Chimiche, Università di Napoli Federico II, Via Cintia, 80126 Napoli, Italy
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14
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Machat MR, Lanzinger D, Pöthig A, Rieger B. Ultrarigid Indenyl-based Hafnocene Complexes for the Highly Isoselective Polymerization of Propene: Tunable Polymerization Performance Adopting Various Sterically Demanding 4-Aryl Substituents. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00814] [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)
- Martin R. Machat
- Wacker-Lehrstuhl
für Makromolekulare Chemie, Technische Universität München, Lichtenbergstraße 4, 85748 Garching bei München, Germany
| | - Dominik Lanzinger
- Advanced Materials & Systems Research, BASF SE, GCP/PM-B001, 67056 Ludwigshafen am Rhein, Germany
| | - Alexander Pöthig
- Catalysis
Research Center, Technische Universität München, Ernst-Otto-Fischer
Straße 1, 85748 Garching bei München, Germany
| | - Bernhard Rieger
- Wacker-Lehrstuhl
für Makromolekulare Chemie, Technische Universität München, Lichtenbergstraße 4, 85748 Garching bei München, Germany
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15
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Quantitative structure–property relationships in propene polymerization by zirconocenes with a rac-SiMe2[Ind]2 based ligand framework. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2015.11.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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