A copper complex with <b>β</b>-ketoamine ligand based on pyrazolone derivative: synthesis, crystal structure and catalysis for norbornene polymerization

Bao, Feng; Ma, Rui; Ma, Rui; Jiao, Yuan‐Hong

doi:10.1080/00958970600892307

Cited by 16 publications

(3 citation statements)

References 26 publications

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“…Complex Cu-11 activated with MAO exhibited a moderate catalytic activity for norbornene polymerization of ∼10 4 g polymer /mol Cu h. An increase in the molar Al/Cu ratio from 300 to 700 led to an increase in activity. When the temperature was raised from 20 • C to 100 • C a linear decrease of the polymer molecular weights and a linear increase of the activity was observed [205].…”

Section: Copper Catalystsmentioning

confidence: 96%

Metal catalysts for the vinyl/addition polymerization of norbornene

Blank

Janiak

2009

Coordination Chemistry Reviews

329

208

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Section: Copper Catalystsmentioning

confidence: 96%

Metal catalysts for the vinyl/addition polymerization of norbornene

Blank

Janiak

2009

Coordination Chemistry Reviews

329

208

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“…Schiff base derivatives containing pyrazolone are important members of the β-ketoamines ligand family because of their ease of preparation and modification of both steric and/or electronic effects. β-Ketoamine ligands containing the pyrazolone ring are easily coordinated to various metal atoms, and nickel-, cobalt-, and copper-based complexes have been synthesized and used to catalyze olefin polymerizations in the presence of MAO [52,53,54,55,56,57,58,59]. To the best of our knowledge, early transition metal complexes chelating β-ketoamine ligands containing pyrazolone rings have not been synthesized and studied for their catalytic properties.…”

Section: Introductionmentioning

confidence: 99%

Homo- and Copolymerizations of Ethylene and Norbornene Using Bis(β-ketoamino) Titanium Catalysts Containing Pyrazolone Rings

Pei

Gao

et al. 2017

Polymers

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A series of bis(β-ketoamino) titanium complexes containing pyrazolone rings (1–3) have been synthesized, characterized, and used as precursors for homo- and copolymerization of ethylene and norbornene. The titanium complexes activated with methylaluminoxane (MAO) exhibited good activities for homopolymerization of ethylene (E) to produce linear polyethylenes (PEs). Ethylene–norbornene copolymers (E–N) were also prepared by these catalysts with moderate activities, and influences of ligand substituents and norbornene addition on copolymer microstructure were studied in detail. Microstructure analysis of the E–N copolymers by 13C NMR and differential scanning calorimetry (DSC) techniques showed that alternating (ENEN) and isolated (ENEE) norbornene predominately appeared in the copolymer chain, and the NN dyad and NNN triad sequences were also present in the copolymers obtained by the less bulky catalyst 1.

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“…Interest in polymers of cyclic olefins such as norbornene (NB) (bicyclo[2.2.1]hept‐2‐ene) has increased dramatically because of the attractive properties of this addition type of polymer such as high chemical resistance, good UV resistance, low dielectric constant, high glass transition temperature, excellent transparency, large refractive index and low birefringence . Up to now, vinyl‐addition polymerization of norbornene has been reported using many transition metal catalysts, including Ti, Zr, Fe, Ni, Pd, Co, Cu and Cr . Janiak and Bao have given a full literature and patent account on the work describing the addition polymerization of norbornene .…”

Section: Introductionmentioning

confidence: 99%

Vinyl polymerizations of norbornene catalyzed by nickel complexes with acetoacetamide ligands

Feng

Chen

Feng

et al. 2013

Applied Organom Chemis

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dOn the basis of a remote effect, a series of acetoacetamide ligands and corresponding nickel complexes N-(R-phenyl) acetoacetamide Ni(CH 2 Ph) (PMe 3 ) (R = H, 1; R = 2-methyl, 2; R = 2,6-dimethyl, 3; R = 2,6-diisopropyl, 4; R = 4-NO 2 , 5) were synthesized and characterized. The solid structure of complex 3 was confirmed by X-ray single-crystal analysis to be of cis form.1 H and 31 P NMR spectroscopy confirmed that cis and trans isomers of nickel complexes were present in solution. Norbornene polymerizations with acetoacetamide nickel complexes activated with modified methylaluminoxane (MMAO) were investigated in detail. Remote steric and electronic effects of acetoacetamide ligand on catalytic activity and molecular weight of polynorbornenes (PNBs) were observed. Characterizations of the obtained PNBs show that the obtained polymer products are non-crystalline vinylic-addition polynorbornenes.

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A copper complex with β-ketoamine ligand based on pyrazolone derivative: synthesis, crystal structure and catalysis for norbornene polymerization

Cited by 16 publications

References 26 publications

Metal catalysts for the vinyl/addition polymerization of norbornene

Metal catalysts for the vinyl/addition polymerization of norbornene

Homo- and Copolymerizations of Ethylene and Norbornene Using Bis(β-ketoamino) Titanium Catalysts Containing Pyrazolone Rings

Vinyl polymerizations of norbornene catalyzed by nickel complexes with acetoacetamide ligands

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