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Kanesato S, Yasoshima K, Matsumoto K, Misawa N, Suzuki Y, Koga N, Nagaoka M. Atomistic Simulation of Hf-Pyridyl Amido-Catalyzed Chain Transfer Alkene Polymerization Reaction and Its Machine Learning for Extraction of Essential Descriptors: Effect of Microscopic Steric Hindrance on the Monomer Insertion Process. J Phys Chem B 2024; 128:6178-6188. [PMID: 38845119 DOI: 10.1021/acs.jpcb.4c01303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2024]
Abstract
The microscopic effects of each substituent of the Hf catalyst and the growing polymer on the monomer insertion process were investigated for Hf-pyridyl amido-catalyzed coordinative chain transfer polymerization using the Red Moon method. Since the Hf catalyst has two reaction sites, cis- and trans-sites, we separately applied the appropriate analysis methods to each one, revealing that the naphthalene ring influenced monomer insertion at the cis-one, while the i-Pr group and the hexyl group of the adjacent 1-octene unit did the trans-one. It was interesting to find that the hexyl group of the 1-octene-inserted catalyst (oHfCat) pushes the naphthalene ring toward the cis-site and narrows the space at the cis-site, thus indirectly creating a steric hindrance to cis-insertions. Further, the relative position of the Hf catalyst and the growing polymer was found to be strongly influenced by the patterns of insertion reactions, i.e., cis- or trans-insertions. In particular, it was clarified that, after trans-insertions, the growing polymer on the Hf atom covers the cis-site, making cis-insertion less likely to occur. These studies reveal the microscopic effects of the catalyst substituents and the growing polymer on the catalyst during the polymerization reaction process; these microscopic analyses using the RM method should provide atomistic insights that are not easy to obtain experimentally for advanced catalyst design and polymerization control.
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Affiliation(s)
- Shuhei Kanesato
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Katsuhisa Yasoshima
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Kentaro Matsumoto
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Nana Misawa
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Yuichi Suzuki
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Nobuaki Koga
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Core Research for Evolutional Science and Technology, Japan Science and Technology Agency (JST-CREST), Honmachi, Kawaguchi 332-0012, Japan
- Future Value Creation Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Masataka Nagaoka
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Core Research for Evolutional Science and Technology, Japan Science and Technology Agency (JST-CREST), Honmachi, Kawaguchi 332-0012, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
- Future Value Creation Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
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2
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Xiong S, Hong A, Ghana P, Bailey BC, Spinney HA, Bailey H, Henderson BS, Marshall S, Agapie T. Acrylate-Induced β-H Elimination in Coordination Insertion Copolymerizaton Catalyzed by Nickel. J Am Chem Soc 2023; 145:26463-26471. [PMID: 37992227 DOI: 10.1021/jacs.3c10800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
Polar monomer-induced β-H elimination is a key elementary step in polar polyolefin synthesis by coordination polymerization but remains underexplored. Herein, we show that a bulky neutral Ni catalyst, 1Ph, is not only a high-performance catalyst in ethylene/acrylate copolymerization (activity up to ∼37,000 kg/(mol·h) at 130 °C in a batch reactor, mol % tBA ∼ 0.3) but also a suitable platform for investigation of acrylate-induced β-H elimination. 4Ph-tBu, a novel Ni alkyl complex generated after acrylate-induced β-H elimination and subsequent acrylate insertion, was identified and characterized by crystallography. A combination of catalysis and mechanistic studies reveals effects of the acrylate monomer, bidentate ligand, and the labile ligand (e.g., pyridine) on the kinetics of β-H elimination, the role of β-H elimination in copolymerization catalysis as a chain-termination pathway, and its potential in controlling the polymer microstructure in polar polyolefin synthesis.
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Affiliation(s)
- Shuoyan Xiong
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Alexandria Hong
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Priyabrata Ghana
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Brad C Bailey
- Chemical Science, Core R&D, The Dow Chemical Company, Midland, Michigan 48667, United States
| | - Heather A Spinney
- Chemical Science, Core R&D, The Dow Chemical Company, Midland, Michigan 48667, United States
| | - Hannah Bailey
- Chemical Science, Core R&D, The Dow Chemical Company, Midland, Michigan 48667, United States
| | - Briana S Henderson
- Chemical Science, Core R&D, The Dow Chemical Company, Midland, Michigan 48667, United States
| | - Steve Marshall
- Chemical Science, Core R&D, The Dow Chemical Company, Midland, Michigan 48667, United States
| | - Theodor Agapie
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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Kanesato S, Yasoshima K, Misawa N, Matsumoto K, Suzuki Y, Koga N, Nagaoka M. Atomistic Chemical Elucidation of the Higher-Rate Reaction Mechanism in Hf-Pyridyl Amido-Catalyzed Copolymerization of Ethene and 1-Octene: Application of Red Moon Simulation with Polymer Propagation Diagrams. J Phys Chem B 2023; 127:7735-7747. [PMID: 37656662 PMCID: PMC10510719 DOI: 10.1021/acs.jpcb.3c03966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 08/02/2023] [Indexed: 09/03/2023]
Abstract
The Hf-pyridyl amido complex ((pyridylamido)Hf(IV)) is a cationic catalyst activated by ion-pairing with auxiliary catalyst B(C6F5)4 to show high activity for α-olefin polymerization. Previously, it was experimentally observed that the consumption rate of 1-octene in the 1-octene/ethene copolymerization is 3-fold compared to the 1-octene homopolymerization in coordinative chain transfer polymerization using the catalyst HfCat+-B(C6F5)4- ion pair (IP) and the chain transfer agent (CTA) ZnEt2. In the present study, we have performed atomistic chemical simulations of the IP-catalyzed homopolymerization of 1-octene and copolymerization of 1-octene and ethene on the basis of the Red Moon (RM) methodology. Using the analysis by polymer propagation diagrams (PPDs), in the 1-octene homopolymerization and the 1-octene/ethene copolymerization with the 1-octene-inserted catalyst (oHfCat), it is theoretically shown that the propagation reactions intermittently pause due to the steric hindrance of two hexyl groups of the oHfCat and the 1-octene inserted adjacent to the Hf atom. On the other hand, in the polymerizations with the ethene-inserted catalyst (eHfCat), it is reasonably recognized that the propagation reactions occur smoothly at a constant rate, and the polymerization continuously proceeds due to the relatively smaller steric hindrance. In conclusion, it was shown, for the first time, that the RM method can be used to reveal the microscopic effects of monomers and substituents in the polymerization reaction processes. Therefore, our current work using PPDs demonstrates the promising potential of the RM methodology in studying catalytic olefin polymerizations and complex chemical reaction systems in general.
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Affiliation(s)
- Shuhei Kanesato
- Graduate
School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Katsuhisa Yasoshima
- Graduate
School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Nana Misawa
- Graduate
School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Kentaro Matsumoto
- Graduate
School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Yuichi Suzuki
- Graduate
School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Nobuaki Koga
- Graduate
School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Core
Research for Evolutional Science and Technology, Japan Science and Technology Agency (JST-CREST), Honmachi, Kawaguchi 332-0012, Japan
- Future
Value Creation Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Masataka Nagaoka
- Graduate
School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Core
Research for Evolutional Science and Technology, Japan Science and Technology Agency (JST-CREST), Honmachi, Kawaguchi 332-0012, Japan
- Elements
Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University Katsura, Kyoto 615-8520, Japan
- Future
Value Creation Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
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4
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Misawa N, Suzuki Y, Saha S, Koga N, Nagaoka M. Theoretical Elucidation of the Effect of Counteranions on the Olefin Polymerization Activity of (Pyridylamido)Hf(IV) Catalyst by QM and REMD Studies: MeB(C6F5)3– versus B(C6F5)4–. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00698] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nana Misawa
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Yuichi Suzuki
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Soumen Saha
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Core Research for Evolutional Science and Technology, Japan Science and Technology Agency (JST-CREST), Honmachi, Kawaguchi 332-0012, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University Katsura, Kyoto 615-8520, Japan
| | - Nobuaki Koga
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Core Research for Evolutional Science and Technology, Japan Science and Technology Agency (JST-CREST), Honmachi, Kawaguchi 332-0012, Japan
- Future Value Creation Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Masataka Nagaoka
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Core Research for Evolutional Science and Technology, Japan Science and Technology Agency (JST-CREST), Honmachi, Kawaguchi 332-0012, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University Katsura, Kyoto 615-8520, Japan
- Future Value Creation Research Center, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
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5
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Sevy A, Merriles DM, Wentz RS, Morse MD. Bond dissociation energies of ScSi, YSi, LaSi, ScC, YC, LaC, CoC, and YCH. J Chem Phys 2019; 151:024302. [PMID: 31301702 DOI: 10.1063/1.5098330] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Predissociation thresholds of the ScSi, YSi, LaSi, ScC, YC, LaC, CoC, and YCH molecules have been measured using resonant two-photon ionization spectroscopy. It is argued that the dense manifold of electronic states present in these molecules causes prompt dissociation when the bond dissociation energy (BDE) is exceeded, allowing their respective predissociation thresholds to provide precise values of their bond energies. The BDEs were measured as 2.015(3) eV (ScSi), 2.450(2) eV (YSi), 2.891(5) eV (LaSi), 3.042(10) eV (ScC), 3.420(3) eV (YC), 4.718(4) eV (LaC), 3.899(13) eV (CoC), and 4.102(3) eV (Y-CH). Using thermochemical cycles, the enthalpies of formation, ΔfH0K°(g), were calculated as 627.4(9.0) kJ mol-1 (ScSi), 633.1(9.0) kJ mol-1 (YSi), 598.1(9.0) kJ mol-1 (LaSi), 793.8(4.3) kJ mol-1 (ScC), 805.0(4.2) kJ mol-1 (YC), 687.3(4.2) kJ mol-1 (LaC), 760.1(2.5) kJ mol-1 (CoC), and 620.8(4.2) kJ mol-1 (YCH). Using data for the BDEs of the corresponding cations allows ionization energies to be obtained through thermochemical cycles as 6.07(11) eV (ScSi), 6.15(13) eV (YSi), 5.60(10) eV (LaSi), 6.26(6) eV (ScC), 6.73(12) or 5.72(11) eV [YC, depending on the value of D0(Y+-C) employed], and 5.88(35) eV (LaC). Additionally, a new value of D0(Co+-C) = 4.045(13) eV was obtained based on the present work and the previously determined ionization energy of CoC. An ionization onset threshold allowed the measurement of the LaSi ionization energy as 5.607(10) eV, in excellent agreement with a prediction based on a thermochemical cycle. Chemical bonding trends are also discussed.
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Affiliation(s)
- Andrew Sevy
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Dakota M Merriles
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Rachel S Wentz
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Michael D Morse
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
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Sevy A, Matthew DJ, Morse MD. Bond dissociation energies of TiC, ZrC, HfC, ThC, NbC, and TaC. J Chem Phys 2018; 149:044306. [DOI: 10.1063/1.5041422] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Andrew Sevy
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Daniel J. Matthew
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
| | - Michael D. Morse
- Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA
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7
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Matsumoto K, Takayanagi M, Sankaran SK, Koga N, Nagaoka M. Role of the Counteranion in the Reaction Mechanism of Propylene Polymerization Catalyzed by a (Pyridylamido)hafnium(IV) Complex. Organometallics 2018. [DOI: 10.1021/acs.organomet.7b00767] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K. Matsumoto
- Graduate
School of Information Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - M. Takayanagi
- Graduate
School of Information Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- The
Center for Data Science Education and Research, Shiga University, 1-1-1
Banba, Hikone, Shiga 522-8522, Japan
- Core
Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Honmachi, Kawaguchi 332-0012, Japan
| | - S. K. Sankaran
- Graduate
School of Information Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Core
Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Honmachi, Kawaguchi 332-0012, Japan
| | - N. Koga
- Core
Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Honmachi, Kawaguchi 332-0012, Japan
- Graduate
School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - M. Nagaoka
- Core
Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Honmachi, Kawaguchi 332-0012, Japan
- Graduate
School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
- Elements
Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Kyodai
Katsura, Kyoto 615-8520, Japan
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8
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Gunasekara T, Preston AZ, Zeng M, Abu-Omar MM. Highly Regioselective α-Olefin Dimerization Using Zirconium and Hafnium Amine Bis(phenolate) Complexes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00359] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thilina Gunasekara
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- Department
of Chemistry and Biochemistry, University of California, Santa
Barbara, California 93106, United States
| | - Andrew Z. Preston
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- Department
of Chemistry and Biochemistry, University of California, Santa
Barbara, California 93106, United States
| | - Manhao Zeng
- Department
of Chemistry and Biochemistry, University of California, Santa
Barbara, California 93106, United States
| | - Mahdi M. Abu-Omar
- Department
of Chemistry and Biochemistry, University of California, Santa
Barbara, California 93106, United States
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Sinclair F, Chen L, Greenland BW, Shaver MP. Installing Multiple Functional Groups on Biodegradable Polyesters via Post-Polymerization Olefin Cross-Metathesis. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01571] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Fern Sinclair
- EastCHEM
School of Chemistry, Joseph Black Building, University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, United Kingdom
| | - Long Chen
- Reading
School of Pharmacy, University of Reading, Reading RG6 6AP, United Kingdom
| | - Barnaby W. Greenland
- Reading
School of Pharmacy, University of Reading, Reading RG6 6AP, United Kingdom
| | - Michael P. Shaver
- EastCHEM
School of Chemistry, Joseph Black Building, University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, United Kingdom
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10
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The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2014. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.09.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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