1
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Li Y, Bao J, Liu Q, Tse MK, Chan MCW. Bis-[C(sp 3)-chelating] Ti 2 catalysts supported by arylene-1,4-diyl-2,3-X 2 bridges for olefin copolymerisation: X substituents impose conformational cooperative effects. Dalton Trans 2024; 53:14391-14398. [PMID: 39136437 DOI: 10.1039/d4dt02006e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/28/2024]
Abstract
The synthesis, spectroscopic characterisation and catalytic olefin polymerisation behaviour of a class of binuclear titanium bis(benzyl) complexes bearing bis-(pyridine-2-phenolate-6-methine)-[μ-(arylene-1,4-diyl-2,3-X2)] ligands [X2 = -C4H4- (1), F2 (2), H2 (3)], and mononuclear analogues, are described. These bimetallic catalyst frameworks are designed to exhibit a degree of conformational flexibility, which is regulated by steric effects and crucially permits tuning of intermetallic distances and geometry, yet their shape-persistent nature can also confer favourable entropic terms. Complexes 1-3 are characterised as two diastereomers [meso (RS) and rac (RR,SS)] in ratios of 1.32, 1.18 and 1.13 respectively, according to 1H NMR spectroscopy. In contrast to 3, [1H,1H]-ROESY experiments for 1 and 2 revealed that the X2 substituents can impose preferred conformations with syn orientations of Ti2 centres and benzyl groups, thus implying that the activated catalysts would present binding sites with the same direction of access. For ethylene-(1-octene) copolymerisation reactions, in conjunction with [Ph3C][B(C6F5)4], catalyst 1 displayed superior efficiencies and produced polymers with higher Mw values and enhanced comonomer incorporation ratios (up to 41%), when compared with the mononuclear 5m (22%). These results are indicative of enhanced comonomer enchainment and cooperative reactivity by the Ti2 sites.
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Affiliation(s)
- Yufang Li
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Junhui Bao
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Qian Liu
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Man-Kit Tse
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Michael C W Chan
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
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2
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Li Y, Liu Q, Bao J, Yiu SM, Chan MCW. Coplanar binuclear group 4 post-metallocene complexes supported by chelating μ-(σ 2-aryl) ligands: characterisation and olefin polymerisation catalysis. Dalton Trans 2023; 53:346-353. [PMID: 38050668 DOI: 10.1039/d3dt03641c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
The report concerns expansion of the previously developed M-[O,N,C] [pyridine-2-phenolate-6-(σ-aryl)] catalyst system into rigid, coplanar bimetallic assemblies, which afford metal-metal distances that are predetermined yet amenable for cooperativity, as well as locked-in "syn" orientation of binding sites that offer the same direction of access for substrates. The binuclear complexes are generated in a regioselective manner to yield para hydrogen atoms (not ortho) at the central μ-aryl moiety, and have been characterised by multinuclear NMR spectroscopy. The "anti" (showing opposite directions of access) and mononuclear analogues have also been prepared for comparison purposes. Six syn-type bimetallic derivatives of Ti, Zr and Hf have been characterised by X-ray crystallography, to reveal metal-metal separations of 6.3-6.7 Å. For ethylene and ethylene/1-octene polymerisation reactions in conjunction with trityl borate, the syn-Ti2 catalysts display superior efficiencies and produced polymers with higher Mw values than for the anti and mono-Ti congeners, thus indicating the possibility of favourable enchainment interactions and cooperative reactivity.
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Affiliation(s)
- Yufang Li
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Qian Liu
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Junhui Bao
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Shek-Man Yiu
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
| | - Michael C W Chan
- Department of Chemistry and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
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3
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Xing Y, Xu L, Liu S, Li Z. Dinuclear Group 4 Metal Complexes Bearing Anthracene-Bridged Bifunctional Amido-Ether Ligands: Remarkable Metal Effect and Cooperativity toward Ethylene/1-Octene Copolymerization. Inorg Chem 2023; 62:2859-2869. [PMID: 36719090 DOI: 10.1021/acs.inorgchem.2c04211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Two types of bifunctional amido-ether ligands (syn-L and anti-L) with the rigid anthracene skeleton were designed to support dinuclear group 4 metal complexes. All organic ligands and organometallic complexes (syn-M2 and anti-M2; M = Hf, Zr, and Ti) were fully characterized by 1H and 13C NMR spectroscopies and elemental analyses. The anti-Hf2 complex showed two confirmations at room temperature with C2-symmetry or S2-symmetry that can inter-exchange, as indicated by VT NMR, while only a C2-symmetric isomer was observed for syn-Hf2 complex at room temperature. However, for Zr and Ti analogues, both syn and anti complexes exhibited only one conformation at room temperature. The molecular structures of complexes syn-Hf2, anti-Hf2, and syn-Ti2 in the solid state were further determined by single-crystal X-ray diffraction, revealing the distances between two metal centers in syn-M2 from 7.138 Å (syn-Ti2) to 7.321 Å (syn-Hf2) but a much farther separation in anti-M2 (8.807 Å in C2-symmetric anti-Hf2). The mononuclear complex (2-CH3O-C6H4-N-C14H9)Zr(NMe2)3 (mono-Zr1) was also prepared for control experiments. In the presence of alkyl aluminum (AlEt3) as the alkylating agent and trityl borate ([Ph3C][B(C6F5)4]) as the co-catalyst, all metal complexes were tested for copolymerization of ethylene with 1-octene at high temperature (130 °C). The preliminary polymerization results revealed that the activity was highly dependent upon the nature of metal centers, and syn-Zr2 showed the highest activity of 9600 kg(PE)·mol-1 (Zr)·h-1, which was about 17- and 2.2-fold higher than those of syn-Hf2 and syn-Ti2, respectively. Benefitting from both steric proximity and electronical interaction of two metal centers, syn-Zr2 exhibited significant cooperativity in comparison to anti-Zr2 and mono-Zr1, with regard to activity and molecular weight and 1-octene incorporation of resultant copolymers.
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Affiliation(s)
- Yanhong Xing
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Lingling Xu
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, 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
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4
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Chen Y, Zhou S, Yang W, Liu S. Hafnium and Zirconium Complexes Bearing SNN-Ligands Enhancing Catalytic Performances toward Ethylene/1-Octene Copolymerization. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Yanjun Chen
- Zhejiang Collaborative Innovation Center for High Value Utilization of Byproducts from Ethylene Project, Ningbo Polytechnic, Ningbo 315800, China
- College of Chemical Engineering, Ningbo Polytechnic, Ningbo 315800, China
| | - Shengmei Zhou
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Weiqun Yang
- Zhejiang Collaborative Innovation Center for High Value Utilization of Byproducts from Ethylene Project, Ningbo Polytechnic, Ningbo 315800, China
- College of Chemical Engineering, Ningbo Polytechnic, Ningbo 315800, China
| | - Shaofeng Liu
- Zhejiang Collaborative Innovation Center for High Value Utilization of Byproducts from Ethylene Project, Ningbo Polytechnic, Ningbo 315800, China
- Key Laboratory of Biobased Polymer Materials, College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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5
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Gao Y, Christianson MD, Wang Y, Coons MP, Chen J, Zhang J, Marshall S, Lohr TL, Klosin J, Marks TJ. Alkane-Soluble Bis[tris(alkylphenyl)carbenium] Diborate Cocatalyst for Olefin Polymerizations. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yanshan Gao
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Matthew D. Christianson
- Corporate R&D, The Dow Chemical Company, 1776 Building, Midland, Michigan 48674, United States
| | - Yang Wang
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Marc P. Coons
- Corporate R&D, The Dow Chemical Company, 1776 Building, Midland, Michigan 48674, United States
| | - Jiazhen Chen
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Jialong Zhang
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Steve Marshall
- Corporate R&D, The Dow Chemical Company, 1776 Building, Midland, Michigan 48674, United States
| | - Tracy L. Lohr
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Jerzy Klosin
- Corporate R&D, The Dow Chemical Company, 1776 Building, Midland, Michigan 48674, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
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Heydari N, Bikas R, Shaterian M, Lis T. Green solvent free epoxidation of olefins by a heterogenised hydrazone-dioxidotungsten(vi) coordination compound. RSC Adv 2022; 12:4813-4827. [PMID: 35425511 PMCID: PMC8981271 DOI: 10.1039/d1ra09217k] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 01/27/2022] [Indexed: 12/19/2022] Open
Abstract
A new mononuclear tungsten coordination compound, [WO2L(CH3OH)] (1), was synthesized by the reaction of WCl6 and H2L (H2L = (E)-4-amino-N'-(5-bromo-2-hydroxybenzylidene)benzohydrazide) in methanol. Both the H2L and compound 1 were characterized by elemental analysis and UV-Vis, FT-IR and NMR spectroscopic methods. The molecular structure of compound 1 was also determined by single crystal X-ray analysis which confirmed the compound is a mononuclear coordination compound of cis-dioxidotungsten(vi) containing a free amine functionality on the ligand. Compound 1 was supported on propionyl chloride-functionalized silica gel by amidification reaction to obtain a heterogeneous catalyst. The obtained heterogeneous catalyst was characterized by FT-IR spectroscopy, thermal gravimetric analysis (TGA), diffuse-reflectance spectroscopy (DRS), X-ray diffraction analysis (XRD), energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) and its catalytic activity was investigated in the epoxidation of olefins with hydrogen peroxide under solvent free conditions. The catalyst was successfully recovered several times and the recovered catalyst was also characterized by various methods including FT-IR, DRS, TGA, SEM and EDX analyses. The results indicated this heterogeneous catalytic system is an effective and selective catalyst for epoxidation of olefins and can be reused several times without significant change in its catalytic activity.
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Affiliation(s)
- Neda Heydari
- Department of Chemistry, Faculty of Science, University of Zanjan 45371-38791 Zanjan Iran
| | - Rahman Bikas
- Department of Chemistry, Faculty of Science, Imam Khomeini International University 34148-96818 Qazvin Iran
| | - Maryam Shaterian
- Department of Chemistry, Faculty of Science, University of Zanjan 45371-38791 Zanjan Iran
| | - Tadeusz Lis
- Faculty of Chemistry, University of Wroclaw Joliot-Curie 14 Wroclaw 50-383 Poland
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7
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Plajer AJ, Williams CK. Heterotrinuclear Ring Opening Copolymerization Catalysis: Structure–activity Relationships. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04449] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Alex J. Plajer
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Charlotte K. Williams
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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8
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Propylene polymerization with MgCl2/Mixed-IDs/TiCl4 system in the presence of different external donor structures. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02784-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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9
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Zhang J, Mason AH, Wang Y, Motta A, Kobayashi T, Pruski M, Gao Y, Marks TJ. Beyond the Active Site. Cp*ZrMe
3
/Sulfated Alumina‐Catalyzed Olefin Polymerization Tacticity via Catalyst⋅⋅⋅Surface Ion‐Pairing. ChemCatChem 2021. [DOI: 10.1002/cctc.202100406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jialong Zhang
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208–3113 USA
| | - Alexander H. Mason
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208–3113 USA
| | - Yang Wang
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208–3113 USA
| | - Alessandro Motta
- Dipartimento di Scienze Chimiche Università di Roma “La Sapienza” and INSTM UdR Roma Piazzale Aldo Moro 5 I-00185 Roma Italy
| | - Takeshi Kobayashi
- U.S. DOE Ames Laboratory Iowa State University Ames IA 50011–3020 USA
| | - Marek Pruski
- U.S. DOE Ames Laboratory Iowa State University Ames IA 50011–3020 USA
| | - Yanshan Gao
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208–3113 USA
| | - Tobin J. Marks
- Department of Chemistry and the Institute for Catalysis in Energy Processes (ICEP) Northwestern University 2145 Sheridan Road Evanston IL 60208–3113 USA
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10
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Cueny ES, Nieszala MR, Froese RDJ, Landis CR. Nature of the Active Catalyst in the Hafnium-Pyridyl Amido-Catalyzed Alkene Polymerization. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00394] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eric S. Cueny
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Megan R. Nieszala
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Robert D. J. Froese
- Core R&D, The Dow Chemical Company, 1776 Building, Midland, Michigan 48674, United States
| | - Clark R. Landis
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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11
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Kang SM, Xu XH, Xu L, Zhou L, Liu N, Wu ZQ. Highly 2,3-selective and fast living polymerization of alkyl-, alkoxy- and phenylallenes using nickel(ii) catalysts. Polym Chem 2021. [DOI: 10.1039/d1py00482d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A novel Ni(ii) catalyst was developed to initiate the polymerization of various allene monomers efficiently in a fast and living/controlled manner, and the thermodynamic and crystallization properties of the polymers were investigated.
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Affiliation(s)
- Shu-Ming Kang
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, China
| | - Xun-Hui Xu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, China
| | - Lei Xu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, China
| | - Li Zhou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, China
| | - Na Liu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, China
| | - Zong-Quan Wu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei 230009, Anhui Province, China
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12
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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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13
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Huang M, Chen J, Wang B, Huang W, Chen H, Gao Y, Marks TJ. Polar Isotactic and Syndiotactic Polypropylenes by Organozirconium‐Catalyzed Masking‐Reagent‐Free Propylene and Amino–Olefin Copolymerization. Angew Chem Int Ed Engl 2020; 59:20522-20528. [DOI: 10.1002/anie.202005635] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/30/2020] [Indexed: 02/02/2023]
Affiliation(s)
- Minglu Huang
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Wanhua Chemical Group Co., Ltd. Yantai Shandong Province 264002 P. R. China
| | - Jiazhen Chen
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Binghao Wang
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Wei Huang
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Haibo Chen
- Wanhua Chemical Group Co., Ltd. Yantai Shandong Province 264002 P. R. China
| | - Yanshan Gao
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Tobin J. Marks
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
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14
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Huang M, Chen J, Wang B, Huang W, Chen H, Gao Y, Marks TJ. Polar Isotactic and Syndiotactic Polypropylenes by Organozirconium‐Catalyzed Masking‐Reagent‐Free Propylene and Amino–Olefin Copolymerization. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005635] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Minglu Huang
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
- Wanhua Chemical Group Co., Ltd. Yantai Shandong Province 264002 P. R. China
| | - Jiazhen Chen
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Binghao Wang
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Wei Huang
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Haibo Chen
- Wanhua Chemical Group Co., Ltd. Yantai Shandong Province 264002 P. R. China
| | - Yanshan Gao
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
| | - Tobin J. Marks
- Department of Chemistry Northwestern University 2145 Sheridan Road Evanston IL 60208 USA
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15
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Park KL, Baek JW, Moon SH, Bae SM, Lee JC, Lee J, Jeong MS, Lee BY. Preparation of Pyridylamido Hafnium Complexes for Coordinative Chain Transfer Polymerization. Polymers (Basel) 2020; 12:E1100. [PMID: 32403453 PMCID: PMC7285347 DOI: 10.3390/polym12051100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 05/02/2020] [Accepted: 05/07/2020] [Indexed: 12/04/2022] Open
Abstract
The pyridylamido hafnium complex (I) discovered at Dow is a flagship catalyst among postmetallocenes, which are used in the polyolefin industry for PO-chain growth from a chain transfer agent, dialkylzinc. In the present work, with the aim to block a possible deactivation process in prototype compound I, the corresponding derivatives were prepared. A series of pyridylamido Hf complexes were prepared by replacing the 2,6-diisopropylphenylamido part in I with various 2,6-R2C6H3N-moieties (R = cycloheptyl, cyclohexyl, cyclopentyl, 3-pentyl, ethyl, or Ph) or by replacing 2-iPrC6H4C(H)- in I with the simple PhC(H)-moiety. The isopropyl substituent in the 2-iPrC6H4C(H)-moiety influences not only the geometry of the structures (revealed by X-ray crystallography), but also catalytic performance. In the complexes bearing the 2-iPrC6H4C(H)-moiety, the chelation framework forms a plane; however, this framework is distorted in the complexes containing the PhC(H)-moiety. The ability to incorporate α-olefin decreased upon replacing 2-iPrC6H4C(H)-with the PhC(H)-moiety. The complexes carrying the 2,6-di(cycloheptyl)phenylamido or 2,6-di(cyclohexyl)phenylamido moiety (replacing the 2,6-diisopropylphenylamido part in I) showed somewhat higher activity with greater longevity than did prototype catalyst I.
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Affiliation(s)
- Kyung Lee Park
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
| | - Jun Won Baek
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
| | - Seung Hyun Moon
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
| | - Sung Moon Bae
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
| | - Jong Chul Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
| | - Junseong Lee
- Department of Chemistry, Chonnam National University, Gwangju 500-757, Korea;
| | - Myong Sun Jeong
- Intellectual Property Education Center, Anyang University, Anyang 708-113, Korea;
| | - Bun Yeoul Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea; (K.L.P.); (J.W.B.); (S.H.M.); (S.M.B.); (J.C.L.)
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Yin X, Qin Y, Dong JY. Investigation of Chain Microstructure of Polypropylene Polymerized by Ziegler–Natta Catalysts with Diester and Diether Compound as Internal Donor via Hydrogen Chain Transfer. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b05888] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xuemin Yin
- CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yawei Qin
- CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jin-Yong Dong
- CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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17
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Zaccaria F, Sian L, Zuccaccia C, Macchioni A. Ion pairing in transition metal catalyzed olefin polymerization. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2020. [DOI: 10.1016/bs.adomc.2019.08.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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18
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Preparation of Half- and Post-Metallocene Hafnium Complexes with Tetrahydroquinoline and Tetrahydrophenanthroline Frameworks for Olefin Polymerization. Polymers (Basel) 2019; 11:polym11071093. [PMID: 31252659 PMCID: PMC6680767 DOI: 10.3390/polym11071093] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 06/24/2019] [Accepted: 06/25/2019] [Indexed: 01/27/2023] Open
Abstract
Hafnium complexes have drawn attention for their application as post-metallocene catalysts with unique performance in olefin polymerization. In this work, a series of half-metallocene HfMe2 complexes, bearing a tetrahydroquinoline framework, as well as a series of [Namido,N,Caryl]HfMe2-type post-metallocene complexes, bearing a tetrahydrophenanthroline framework, were prepared; the structures of the prepared Hf complexes were unambiguously confirmed by X-ray crystallography. When the prepared complexes were reacted with anhydrous [(C18H37)2N(H)Me]+[B(C6F5)4]−, desired ion-pair complexes, in which (C18H37)2NMe coordinated to the Hf center, were cleanly afforded. The activated complexes generated from the half-metallocene complexes were inactive for the copolymerization of ethylene/propylene, while those generated from post-metallocene complexes were active. Complex bearing bulky isopropyl substituents (12) exhibited the highest activity. However, the activity was approximately half that of the prototype pyridylamido-Hf Dow catalyst. The comonomer incorporation capability was also inferior to that of the pyridylamido-Hf Dow catalyst. However, 12 performed well in the coordinative chain transfer polymerization performed in the presence of (octyl)2Zn, converting all the fed (octyl)2Zn to (polyolefinyl)2Zn with controlled lengths of the polyolefinyl chain.
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19
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Gao Y, Christianson MD, Wang Y, Chen J, Marshall S, Klosin J, Lohr TL, Marks TJ. Unexpected Precatalyst σ-Ligand Effects in Phenoxyimine Zr-Catalyzed Ethylene/1-Octene Copolymerizations. J Am Chem Soc 2019; 141:7822-7830. [PMID: 31017398 DOI: 10.1021/jacs.9b01445] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Recent decades have witnessed intense research efforts aimed at developing new homogeneous olefin polymerization catalysts, with a primary focus on metal-Cl or metal-hydrocarbyl precursors. Curiously, metal-NR2 precursors have received far less attention. In this contribution, the Zr-amido complex FI2ZrX2 (FI = 2,4-di- tert-butyl-6-((isobutylimino)methyl)phenolate, X = NMe2) is found to exhibit high ethylene polymerization activity and relatively high 1-octene coenchainment selectivity (up to 7.2 mol%) after sequential activation with trimethylaluminum, then Ph3C+B(C6F5)4-. In sharp contrast, catalysts with traditional hydrocarbyl ligands such as benzyl and methyl give low 1-octene incorporation (0-1.0 mol%). This unexpected selectivity persists under scaled/industrial operating conditions and was previously inaccessible with traditional metal-Cl or -hydrocarbyl precursors. NMR, X-ray diffraction, and catalytic control experiments indicate that in this case an FI ligand is abstracted from FI2Zr(NMe2)2 by trimethylaluminum in the activation process to yield a catalytically active cationic mono-FIZr species. Heretofore this process was believed to serve only as a major catalyst deactivation pathway to be avoided. This work demonstrates the importance of investigating diverse precatalyst monodentate σ-ligands in developing new catalyst systems, especially for group 4 olefin polymerization catalysts.
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Affiliation(s)
- Yanshan Gao
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208-3113 , United States
| | - Matthew D Christianson
- Corporate R&D , The Dow Chemical Company , 1776 Building , Midland , Michigan 48674 , United States
| | - Yang Wang
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208-3113 , United States
| | - Jiazhen Chen
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208-3113 , United States
| | - Steve Marshall
- Corporate R&D , The Dow Chemical Company , 1776 Building , Midland , Michigan 48674 , United States
| | - Jerzy Klosin
- Corporate R&D , The Dow Chemical Company , 1776 Building , Midland , Michigan 48674 , United States
| | - Tracy L Lohr
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208-3113 , United States
| | - Tobin J Marks
- Department of Chemistry , Northwestern University , Evanston , Illinois 60208-3113 , United States
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20
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Kwon SJ, Baek JW, Lee HJ, Kim TJ, Ryu JY, Lee J, Shin EJ, Lee KS, Lee BY. Preparation of Pincer Hafnium Complexes for Olefin Polymerization. Molecules 2019; 24:E1676. [PMID: 31035708 PMCID: PMC6540127 DOI: 10.3390/molecules24091676] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 11/17/2022] Open
Abstract
Pincer-type [Cnaphthyl, Npyridine, Namido]HfMe2 complex is a flagship among the post-metallocene catalysts. In this work, various pincer-type Hf-complexes were prepared for olefin polymerization. Pincer-type [Namido, Npyridine, Namido]HfMe2 complexes were prepared by reacting in situ generated HfMe4 with the corresponding ligand precursors, and the structure of a complex bearing 2,6-Et2C6H3Namido moieties was confirmed by X-ray crystallography. When the ligand precursors of [(CH3)R2Si-C5H3N-C(H)PhN(H)Ar (R = Me or Ph, Ar = 2,6-diisopropylphenyl) were treated with in situ generated HfMe4, pincer-type [Csilylmethyl, Npyridine, Namido]HfMe2 complexes were afforded by formation of Hf-CH2Si bond. Pincer-type [Cnaphthyl, Sthiophene, Namido]HfMe2 complex, where the pyridine moiety in the flagship catalyst was replaced with a thiophene unit, was not generated when the corresponding ligand precursor was treated with HfMe4. Instead, the [Sthiophene, Namido]HfMe3-type complex was obtained with no formation of the Hf-Cnaphthyl bond. A series of pincer-type [Cnaphthyl, Npyridine, Nalkylamido]HfMe2 complexes was prepared where the arylamido moiety in the flagship catalyst was replaced with alkylamido moieties (alkyl = iPr, cyclohexyl, tBu, adamantyl). Structures of the complexes bearing isopropylamido and adamantylamido moieties were confirmed by X-ray crystallography. Most of the complexes cleanly generated the desired ion-pair complexes when treated with an equivalent amount of [(C18H37)2N(H)Me]+[B(C6F5)4]-, which showed negligible activity in olefin polymerization. Some complexes bearing bulky substituents showed moderate activities, even though the desired ion-pair complexes were not cleanly afforded.
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Affiliation(s)
- Su Jin Kwon
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea.
| | - Jun Won Baek
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea.
| | - Hyun Ju Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea.
| | - Tae Jin Kim
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea.
| | - Ji Yeon Ryu
- Department of Chemistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Korea.
| | - Junseong Lee
- Department of Chemistry, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Korea.
| | - Eun Ji Shin
- LG Chem, Ltd., 188, Munji-ro, Yuseong-gu Daejeon 305-738, Korea.
| | - Ki Soo Lee
- LG Chem, Ltd., 188, Munji-ro, Yuseong-gu Daejeon 305-738, Korea.
| | - Bun Yeoul Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Korea.
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21
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Cueny ES, Landis CR. The Hafnium-Pyridyl Amido-Catalyzed Copolymerization of Ethene and 1-Octene: How Small Amounts of Ethene Impact Catalysis. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00250] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eric S. Cueny
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Clark R. Landis
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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22
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Liu J, Li Z, Zhang X, Otake KI, Zhang L, Peters AW, Young MJ, Bedford NM, Letourneau SP, Mandia DJ, Elam JW, Farha OK, Hupp JT. Introducing Nonstructural Ligands to Zirconia-like Metal–Organic Framework Nodes To Tune the Activity of Node-Supported Nickel Catalysts for Ethylene Hydrogenation. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04828] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Jian Liu
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Zhanyong Li
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Xuan Zhang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Ken-ichi Otake
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Lin Zhang
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Aaron W. Peters
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Matthias J. Young
- Applied Materials Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
| | - Nicholas M. Bedford
- School of Chemical Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Steven P. Letourneau
- Applied Materials Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
| | - David J. Mandia
- Applied Materials Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
| | - Jeffrey W. Elam
- Applied Materials Division, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
| | - Omar K. Farha
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Joseph T. Hupp
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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23
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Cueny ES, Landis CR. Zinc-Mediated Chain Transfer from Hafnium to Aluminum in the Hafnium-Pyridyl Amido-Catalyzed Polymerization of 1-Octene Revealed by Job Plot Analysis. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00900] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Eric S. Cueny
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Clark R. Landis
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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24
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Invergo AM, Liu S, Dicken RD, Mouat AR, Delferro M, Lohr TL, Marks TJ. How Close Is Too Close? Polymerization Behavior and Monomer-Dependent Reorganization of a Bimetallic Salphen Organotitanium Catalyst. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00220] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Anna M. Invergo
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Shaofeng Liu
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Rachel D. Dicken
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Aidan R. Mouat
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Massimiliano Delferro
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Tracy L. Lohr
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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