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Synthesis, Characterization and Catalytic Property Studies for Isoprene Polymerization of Iron Complexes Bearing Unionized Pyridine-Oxime Ligands. Polymers (Basel) 2022; 14:polym14173612. [PMID: 36080685 PMCID: PMC9459928 DOI: 10.3390/polym14173612] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 08/26/2022] [Accepted: 08/27/2022] [Indexed: 11/17/2022] Open
Abstract
Iron complexes of the types [Fe(HL)2Cl2] (Fe1: HL1 = pyridine-2-aldoxime; Fe2: HL2 = 6-methylpyridine-2-aldoxime; Fe3: HL3 = phenyl-2-pyridylketoxime; Fe4: HL4 = picolinaldehyde O-methyl oxime) were prepared and characterized by elemental analysis and IR spectroscopy. The crystal structure of Fe2, determined by single-crystal X-ray diffraction, featured a distorted octahedral coordination of the iron center binding with two ligands of HL2. The X-ray structure and infrared spectral data indicated that pyridine-oxime ligands act as unionized bidentate ligand by coordinating with Npyridine and Noxime. The catalytic performance for isoprene polymerization, catalyzed by these pyridine-oxime-ligated iron complexes, was examined. For a binary catalytic system combined with MAO, complexes Fe1, Fe3 and Fe4 were found to be highly active (up to 6.5 × 106 g/mol·h) in cis-1,4-alt-3,4 enchained polymerization, with average molecular weights in the range of 60–653 kg/mol and narrow PDI values of 1.7–3.5, even with very low amounts of MAO (Al/Fe = 5). Upon activation with [Ph3C][B(C6F5)4]/AlR3 for the ternary catalytic system, theses complexes showed extremely high activities, as well about 98% yield after 2 min, to afford cis-1,4-alt-3,4-polyisoprene with a molecular weight of 140–420 kg/mol.
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2
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Ricci G, Leone G, Zanchin G, Palucci B, Boccia AC, Sommazzi A, Masi F, Zacchini S, Guelfi M, Pampaloni G. Highly Stereoregular 1,3-Butadiene and Isoprene Polymers through Monoalkyl- N-Aryl-Substituted Iminopyridine Iron Complex-Based Catalysts: Synthesis and Characterization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Giovanni Ricci
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), via A. Corti 12, I-20133 Milano, Italy
| | - Giuseppe Leone
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), via A. Corti 12, I-20133 Milano, Italy
| | - Giorgia Zanchin
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), via A. Corti 12, I-20133 Milano, Italy
| | - Benedetta Palucci
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), via A. Corti 12, I-20133 Milano, Italy
| | - Antonella Caterina Boccia
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), via A. Corti 12, I-20133 Milano, Italy
| | - Anna Sommazzi
- Versalis S.P.A.─Centro Ricerca Novara, Via G. Fauser 4, I-28100 Novara, Italy
| | - Francesco Masi
- Versalis S.p.A.─R&D Partner Catalysis, Piazza Boldrini 1, I-20097 San Donato Milanese, Italy
| | - Stefano Zacchini
- Università di Bologna, Dipartimento di Chimica Industriale “Toso Montanari”, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Massimo Guelfi
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, I-56124 Pisa, Italy
| | - Guido Pampaloni
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, I-56124 Pisa, Italy
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3
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Ricci G, Pampaloni G, Sommazzi A, Masi F. Dienes Polymerization: Where We Are and What Lies Ahead. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00004] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Giovanni Ricci
- CNR-Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC), Via A. Corti 12, I-20133 Milano, Italy
| | - Guido Pampaloni
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, I-56124 Pisa, Italy
| | - Anna Sommazzi
- Centro Ricerca Novara, Versalis S.p.A., Via G. Fauser 4, I-28100 Novara, Italy
| | - Francesco Masi
- R&D Partner Catalysis, Versalis S.p.A., Piazza Boldrini 1, I-20097 San Donato Milanese (MI), Italy
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4
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Chen XM, Huang LC, Gao W. One-pot synthesis of cobalt complexes with 2,6-bis(arylimino)phenoxyl/phenthioxyl ligands and catalysis on isoprene polymerization. Dalton Trans 2021; 50:5218-5225. [PMID: 33881099 DOI: 10.1039/d1dt00371b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Several cobalt complexes supported by 2,6-bis(arylimino)phenoxyl/phenthioxyl ligands κ2N,X-Ar[NXN]CoCl(THF) (1a, X = O, Ar = 2,6-Me2C6H3; 1b, X = O, Ar = 2,6-iPr2C6H3; 2a, X = S, Ar = 2,6-Me2C6H3; 2b, X = S, Ar = 2,6-iPr2C6H3) were synthesized by direct oxygen(sulfur) insertion into the C-Co bond of the mixed-valence cobalt complexes {κ2C,N,η6-Ar[NCN]Co-κN-CoCl(μ-Cl)}2. Crystallization of 1b in the presence of water gave the hydrolysis product 1b'. Treatment of Ar[NCN]Li with dioxygen followed by the addition of CoCl2 afforded the heteroatomic complexes {κ2N,O-Ar[NON]Co(μ-Cl)2Li}2 (3a, Ar = 2,6-Me2C6H3; 3b, Ar = 2,6-iPr2C6H3) or κ2N,O-Ar[NON]Co2Cl2(μ-Cl)2Li(THF)2 (4a, Ar = 2,6-Me2C6H3; 4b, Ar = 2,6-iPr2C6H3) depending on the amount of CoCl2 used. The Co(iii)/Li heterometallic complex 3b' with imino-phenoxyl-amino ligands was formed probably via a redox reaction of 3b. The reactions of Ar[NCN]Li with elemental sulfur and CoCl2 gave κ2N,S-Ar[NSN]Co2Cl2(μ-Cl)2Li(THF)2 (5a, Ar = 2,6-Me2C6H3; 5b, Ar = 2,6-iPr2C6H3) respectively. These complexes were well characterized by FT-IR and elemental analyses, and the molecular structures of 1b', 3b', 4a, and 4b were confirmed by X-ray crystallography. Upon activation with Al2Et3Cl3 in toluene, these complexes showed high activities in isoprene polymerization affording cis-1,4 enriched polymers with a moderate molecular weight (0.85-4.72 × 104 Da).
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Affiliation(s)
- Xue-Meng Chen
- College of Chemistry, Jilin University, Changchun 130012, China.
| | - Li-Cheng Huang
- College of Chemistry, Jilin University, Changchun 130012, China.
| | - Wei Gao
- College of Chemistry, Jilin University, Changchun 130012, China.
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Jagtap RA, Ankade SB, Gonnade RG, Punji B. Achiral and chiral NNN-pincer nickel complexes with oxazolinyl backbones: application in transfer hydrogenation of ketones. NEW J CHEM 2021. [DOI: 10.1039/d1nj01698a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
NNN-based achiral and chiral (oxazolinyl)amido-pincer nickel complexes are developed and employed for the catalytic transfer hydrogenation of ketones.
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Affiliation(s)
- Rahul A. Jagtap
- Organometallic Synthesis and Catalysis Lab
- Chemical Engineering Division
- CSIR–National Chemical Laboratory (CSIR–NCL)
- Dr Homi Bhabha Road
- Pune – 411 008
| | - Shidheshwar B. Ankade
- Organometallic Synthesis and Catalysis Lab
- Chemical Engineering Division
- CSIR–National Chemical Laboratory (CSIR–NCL)
- Dr Homi Bhabha Road
- Pune – 411 008
| | - Rajesh G. Gonnade
- Centre for Material Characterization
- CSIR–National Chemical Laboratory
- Pune – 411 008
- India
| | - Benudhar Punji
- Organometallic Synthesis and Catalysis Lab
- Chemical Engineering Division
- CSIR–National Chemical Laboratory (CSIR–NCL)
- Dr Homi Bhabha Road
- Pune – 411 008
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6
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Huang LC, Zhang JS, Jia T, Mu Y, Gao W. Bis(imino)aryl NCN pincer cobalt complexes: synthesis and disproportionation. Dalton Trans 2020; 49:5219-5227. [PMID: 32239026 DOI: 10.1039/d0dt00747a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Treatment of iPr[NCN]Br (2,6-(2,6-iPr2C6H3C[double bond, length as m-dash]N)2C6H3Br) with nBuLi in THF and the subsequent addition of 1 equiv. of CoCl2, CoCl2(Ph3P)2, and CoBr2 gave pincer Co(ii) complexes {iPr[NCN]Co(μ-Cl)}2 (1d), iPr[NCN]CoClPh3P (1d-Ph3P), and iPr[NCN]CoBr2·Li(THF)4 (1d-LiBr) respectively in moderate yields, whereas the slow addition of in situ prepared iPr[NCN]Li to CoCl2 in THF afforded an unexpected mixed-valence cobalt(i/ii) complex κ2C,N,η6-iPr[NCN]Co-κN-CoCl3·Li(THF)4 (2d). Complex 2d was probably formed via a disproportionation reaction of the iPr[NCN]Co(ii) species with excess CoCl2 during the reaction. Nevertheless, addition of CoCl2 to in situ formed 1d-THF at room temperature did not lead to 2d but gave a trinuclear Co(ii) complex {iPr[NCN]Co(μ-Cl)(μ-Br/Cl)}2Co (1d-CoCl2) in moderate yield. Similar reactions using ligands containing small ortho groups in the imine moieties R[NCN]Br (2,6-(2,6-Me2C6H3C[double bond, length as m-dash]N)2C6H3Br, Me[NCN]Br; 2,6-(2,6-Et2C6H3C[double bond, length as m-dash]N)2C6H3Br, Et[NCN]Br; 2,6-(2,4,6-Me3C6H2C[double bond, length as m-dash]N)2C6H3Br, Mes[NCN]Br) and CoBr2, regardless of the reactant addition sequence, afforded mixed-valence cobalt(i/ii) complexes {κ2C,N,η6-R[NCN]Co-κN-CoBr(μ-Br)}2 (Me[NCN] (2a), Et[NCN] (2b), and Mes[NCN] (2c)), suggesting that the bulkiness of the ortho-groups in the imine moieties of the ligands plays an important role in the disproportionation reaction. In the presence of PMe3, Co(ii) complexes κ2C,N-R[NCN]CoBr(PMe3)2 (3a-d) and a bisligated cobalt(ii) complex κ3N,C,N-κ2C,N-iPr[NCN]2CoPMe3 (4d) can be prepared respectively in high yields. The molecular structures of 1d-LiBr, 1d-CoCl2, 2b, 2d, 3a, and 4d were confirmed by X-ray crystallographic analysis and the detailed mechanisms of the disproportionation reaction were proposed.
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Affiliation(s)
- Li-Cheng Huang
- College of Chemistry, Jilin University, Changchun 130012, China.
| | - Jing-Shun Zhang
- College of Chemistry, Jilin University, Changchun 130012, China.
| | - Teng Jia
- College of Chemistry, Jilin University, Changchun 130012, China.
| | - Ying Mu
- College of Chemistry, Jilin University, Changchun 130012, China.
| | - Wei Gao
- College of Chemistry, Jilin University, Changchun 130012, China.
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7
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Champouret Y, Hashmi OH, Visseaux M. Discrete iron-based complexes: Applications in homogeneous coordination-insertion polymerization catalysis. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.03.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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8
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Tanaka R, Ikeda K, Nakayama Y, Shiono T. Cis-1,4 Specific Polymerization of 1,3-Butadiene Using PNP-pincer Ligated Iron(II) Complexes. CHEM LETT 2019. [DOI: 10.1246/cl.190115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ryo Tanaka
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-hiroshima, Hiroshima 739-8527, Japan
| | - Kenshi Ikeda
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-hiroshima, Hiroshima 739-8527, Japan
| | - Yuushou Nakayama
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-hiroshima, Hiroshima 739-8527, Japan
| | - Takeshi Shiono
- Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-hiroshima, Hiroshima 739-8527, Japan
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9
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Fang L, Zhao W, Han C, Liu H, Hu Y, Zhang X. Isoprene Polymerization with Pyrazolylimine Cobalt(II) Complexes: Manipulation of 3,4‐Selectivities by Ligand Design and Use of Triphenylphosphine. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801107] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Liang Fang
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street 130022 Changchun PR China
| | - Wenpeng Zhao
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street 130022 Changchun PR China
- Changchun Institute of Applied Chemistry University of Chinese Academy of Sciences 100039 Beijing PR China
| | - Chao Han
- School of Materials Science and Engineering Changchun Institute of Applied Chemistry Shenyang University of Chemical Technology Shenyang Liaoning China
| | - Heng Liu
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street 130022 Changchun PR China
| | - Yanming Hu
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street 130022 Changchun PR China
| | - Xuequan Zhang
- CAS Key Laboratory of High‐Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street 130022 Changchun PR China
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10
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Jing C, Wang L, Mahmood Q, Zhao M, Zhu G, Zhang X, Wang X, Wang Q. Synthesis and characterization of aminopyridine iron(ii) chloride catalysts for isoprene polymerization: sterically controlled monomer enchainment. Dalton Trans 2019; 48:7862-7874. [DOI: 10.1039/c9dt00452a] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Aminopyridine iron(ii) chloride complexes coordinating a type of flexible ligand are reported as precursors for controlled polymerization of isoprenes.
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Affiliation(s)
- Chuyang Jing
- Key Laboratory of Biobased Materials
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- China
| | - Liang Wang
- Key Laboratory of Biobased Materials
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- China
| | - Qaiser Mahmood
- Key Laboratory of Biobased Materials
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- China
| | - Mengmeng Zhao
- Key Laboratory of Biobased Materials
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- China
| | - Guangqian Zhu
- Key Laboratory of Biobased Materials
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- China
| | - Xianhui Zhang
- Key Laboratory of Biobased Materials
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- China
| | - Xiaowu Wang
- Key Laboratory of Biobased Materials
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- China
| | - Qinggang Wang
- Key Laboratory of Biobased Materials
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao
- China
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11
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Rani V, Singh HB, Butcher RJ. NCN Nickel(II) Pincer Complexes of 5‐
tert
‐Butyl‐1,3‐bis(
N
‐substituted benzimidazol‐2′‐yl)benzenes: Solid and Solution State Behaviour. ChemistrySelect 2018. [DOI: 10.1002/slct.201802644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Varsha Rani
- Department of ChemistryIndian Institute of Technology Bombay Mumbai 400076 India
| | - Harkesh B. Singh
- Department of ChemistryIndian Institute of Technology Bombay Mumbai 400076 India
| | - Ray J. Butcher
- Department of ChemistryHoward University 525 College Street NW, Washington, D.C. 20059 United States
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12
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Ren X, Wesolek M, Braunstein P. Nickel(II) Complexes with Tritopic Nimine
CNHC
Namine
Pincer Ligands. Chemistry 2018; 24:14794-14801. [DOI: 10.1002/chem.201802969] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Indexed: 12/30/2022]
Affiliation(s)
- Xiaoyu Ren
- Université de Strasbourg; CNRS, CHIMIE UMR 7177; Laboratoire de Chimie de Coordination; 4 rue Blaise Pascal 67081 Strasbourg Cedex France
| | - Marcel Wesolek
- Université de Strasbourg; CNRS, CHIMIE UMR 7177; Laboratoire de Chimie de Coordination; 4 rue Blaise Pascal 67081 Strasbourg Cedex France
| | - Pierre Braunstein
- Université de Strasbourg; CNRS, CHIMIE UMR 7177; Laboratoire de Chimie de Coordination; 4 rue Blaise Pascal 67081 Strasbourg Cedex France
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13
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Jia T, Xu SY, Huang LC, Gao W. Scandium and gadolinium complexes with aryldiimine NCN pincer ligands: Synthesis, characterization, and catalysis on isoprene and 1,5-hexadiene polymerization. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.02.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Suslov D, Bykov M, Kuzmin A, Abramov P, Kravchenko O, Pakhomova M, Rokhin A, Ushakov I, Tkach V. Cationic acetylacetonate palladium complexes/boron trifluoride etherate catalyst systems for polymerization of 5-methoxycarbonylnorbornene. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2017.12.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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15
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[Pd(acac)(L)2][BF4] (L = morpholine, diethylamine, dibutylamine, dioctylamine): Synthesis, structure and their catalytic activity. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.12.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Liu Z, Ganguly R, Vidović D. Pursuing the active species in an aluminium-based Lewis acid system for catalytic Diels-Alder cycloadditions. Dalton Trans 2017; 46:753-759. [PMID: 27991617 DOI: 10.1039/c6dt04213a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Several Al-based complexes supported by a bis(imino)aryl NCN pincer ligand have been prepared. Systematic structural and experimental evidence identified a cationic species, supported by a THF molecule, as the best Lewis acid precatalyst for a range of Diels-Alder cycloadditions. This highlighted the importance of fully isolating and characterizing the active species in any catalytic process especially when Lewis acids are used due to the presence of hidden Brønsted acids (HBAs). Finally, the control experiments conducted in order to eliminate HBA activity that involve a bulky pyridine base should be performed with caution as the corresponding protonated pyridinium salt could also serve as a proton source.
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Affiliation(s)
- Zhizhou Liu
- School of Physical and Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore, 637371, Singapore.
| | - Rakesh Ganguly
- School of Physical and Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore, 637371, Singapore.
| | - Dragoslav Vidović
- School of Physical and Mathematical Sciences, Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore, 637371, Singapore.
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17
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Polymerization of 1,3-butadiene catalyzed by cobalt(II) and nickel(II) complexes bearing pyridine-2-imidate ligands. CHINESE JOURNAL OF POLYMER SCIENCE 2016. [DOI: 10.1007/s10118-016-1825-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Synthesis, characterization, and application for addition polymerization of norbornene of novel acetylacetonate bis(anilines) palladium (II) complexes. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.01.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Pascualini ME, Stoian SA, Ozarowski A, Di Russo NV, Thuijs AE, Abboud KA, Christou G, Veige AS. Synthesis and characterization of a family of M(2+) complexes supported by a trianionic ONO(3-) pincer-type ligand: towards the stabilization of high-spin square-planar complexes. Dalton Trans 2015; 44:20207-15. [PMID: 26537572 DOI: 10.1039/c5dt03960f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High-spin square-planar molecular compounds are rare. In an effort to access this unique combination of geometry and spin state, we report the synthesis of a series of M(II) compounds stabilized by a trianionic pincer-type ligand, highlighting the formation of a high-spin square-planar Co(II) complex. Low-temperature, variable-frequency EPR measurements reveal that the ground electronic state of the Co(II) analogue is a highly anisotropic Kramers doublet (effective g values 7.35, 2.51, 1.48). This doublet can be identified with the lowest doublet of a quartet, S = 3/2 spin state that exhibits a very large ZFS, D ≥ 50 cm(-1). The observation of an effective g value considerably greater than the largest spin-only value 6, demonstrates that the orbital angular moment is essentially unquenched along one spatial direction. Density Functional Theory (DFT) and time-dependent DFT calculations reveal the electronic configurations of the ground and excited orbital states. A qualitative crystal field description of the geff tensor shows that it originates from the spin-orbit coupling acting on states obtained through the transfer of a β electron from the doubly occupied xy to the singly-occupied {xz/yz} orbitals.
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Affiliation(s)
- M E Pascualini
- Department of Chemistry, Center for Catalysis, University of Florida, Gainesville, FL 32611, USA.
| | - S A Stoian
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA.
| | - A Ozarowski
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32310, USA.
| | - N V Di Russo
- Department of Chemistry, Center for Catalysis, University of Florida, Gainesville, FL 32611, USA.
| | - A E Thuijs
- Department of Chemistry, Center for Catalysis, University of Florida, Gainesville, FL 32611, USA.
| | - K A Abboud
- Department of Chemistry, Center for Catalysis, University of Florida, Gainesville, FL 32611, USA.
| | - G Christou
- Department of Chemistry, Center for Catalysis, University of Florida, Gainesville, FL 32611, USA.
| | - A S Veige
- Department of Chemistry, Center for Catalysis, University of Florida, Gainesville, FL 32611, USA.
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20
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Guo J, Zhang C, Bi J, Zhang H, Bai C, Hu Y, Zhang X. Cobalt complexes bearing pyridine-imino ligands with bulky aryl substituents: Synthesis, characterization, and 1,3-butadiene polymerization behaviors. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.05.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Liu H, Wang F, Han C, Zhang H, Bai C, Hu Y, Zhang X. Cobalt and nickel complexes supported by 2,6-bis(imidate)pyridyl ligands: Synthesis, characterization, and 1,3-butadiene polymerization studies. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.05.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Suslov DS, Bykov MV, Abramov PA, Pahomova MV, Ushakov IA, Voronov VK, Tkach VS. [Pd(acac)(MeCN)2]BF4: air-tolerant, activator-free catalyst for alkene dimerization and polymerization. RSC Adv 2015. [DOI: 10.1039/c5ra24591e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
[Pd(acac)(MeCN)2]BF4 has been observed to catalyze selective substituted styrene dimerization and addition norbornene polymerization.
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Affiliation(s)
| | | | - P. A. Abramov
- Nikolaev Institute of Inorganic Chemistry SB RAS
- Novosibirsk
- Russia
- Novosibirsk State University
- Novosibirsk
| | | | - I. A. Ushakov
- National Research Irkutsk State Technical University
- Irkutsk
- Russia
| | - V. K. Voronov
- National Research Irkutsk State Technical University
- Irkutsk
- Russia
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Mougang-Soumé B, Belanger-Gariépy F, Zargarian D. Synthesis, Characterization, and Oxidation of New POCNimine-Type Pincer Complexes of Nickel. Organometallics 2014. [DOI: 10.1021/om500529e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
| | | | - Davit Zargarian
- Department of Chemistry, Université de Montréal, Montreal, Quebec, Canada
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26
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Gong D, Jia X, Wang B, Zhang X, Huang KW. Trans-1,4 selective polymerization of 1,3-butadiene with symmetry pincer chromium complexes activated by MMAO. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.05.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Synthesis, characterization, and 1,3-butadiene polymerization studies of Co(II), Ni(II), and Fe(II) complexes bearing 2-(N-arylcarboximidoylchloride)quinoline ligand. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2014.04.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Liu H, Wang F, Liu L, Dong B, Zhang HX, Bai CX, Hu YM, Zhang XQ. Synthesis, characterization and 1,3-butadiene polymerization behaviors of three ONO, ONN, and NNN tridentate Co(II) complexes. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.06.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Wang B, Bi J, Zhang C, Dai Q, Bai C, Zhang X, Hu Y, Jiang L. Highly active and trans-1,4 specific polymerization of 1,3-butadiene catalyzed by 2-pyrazolyl substituted 1,10-phenanthroline ligated iron (II) complexes. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.07.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Zhang J, Hao Z, Gao W, Xin L, Zhang L, Mu Y. Y, Lu, and Gd Complexes of NCO/NCS Pincer Ligands: Synthesis, Characterization, and Catalysis in thecis-1,4-Selective Polymerization of Isoprene. Chem Asian J 2013; 8:2079-87. [DOI: 10.1002/asia.201300581] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Indexed: 11/08/2022]
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Huo P, Liu W, He X, Wang H, Chen Y. Nickel(II) Complexes with Three-Dimensional Geometry α-Diimine Ligands: Synthesis and Catalytic Activity toward Copolymerization of Norbornene. Organometallics 2013. [DOI: 10.1021/om300883h] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ping Huo
- Department of Chemistry/Institute of Polymers, Nanchang University, 999 Xuefu Avenue, Nanchang 330031,
People’s Republic of China
- Key Laboratory of Jiangxi University
for Applied Chemistry and Chemical Biology, Yichun University, Yichun 336000, People’s Republic
of China
| | - Wanyun Liu
- Department of Chemistry/Institute of Polymers, Nanchang University, 999 Xuefu Avenue, Nanchang 330031,
People’s Republic of China
- Key Laboratory of Jiangxi University
for Applied Chemistry and Chemical Biology, Yichun University, Yichun 336000, People’s Republic
of China
| | - Xiaohui He
- Department of Chemistry/Institute of Polymers, Nanchang University, 999 Xuefu Avenue, Nanchang 330031,
People’s Republic of China
| | - Hongming Wang
- Department of Chemistry/Institute of Polymers, Nanchang University, 999 Xuefu Avenue, Nanchang 330031,
People’s Republic of China
| | - Yiwang Chen
- Department of Chemistry/Institute of Polymers, Nanchang University, 999 Xuefu Avenue, Nanchang 330031,
People’s Republic of China
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