Applications of metal N-heterocyclic carbene complexes in olefin polymerizations

Feng, Ting; Zhang, Le; Wu, Shang-Xiao; Shi, Xiaochao; Han, Ying-Feng

doi:10.1039/d4qi01470g

Inorg. Chem. Front.

2024

DOI: 10.1039/d4qi01470g

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Applications of metal N-heterocyclic carbene complexes in olefin polymerizations

Ting Feng,

Le Zhang,

Shang-Xiao Wu

et al.

Abstract: This review summarizes the progress in recent decades regarding the structure–activity relationships of various well-defined metal-NHC catalysts in the polymerization of olefins, particularly α-olefins, styrene, norbornene, and others.

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Catalytic Benefits of an Ethynylphenyl-Based Pd^II Bis(NHC) over a Phenyl-Based Pd^II Bis(NHC): Insights into the Structural Aspects and Donor Strength Probing

Mondal,

Saha,

Naskar

et al. 2024

Inorg. Chem.

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The amount of cooperation between the metal centers by tailored ligand design is vital to achieve the multimetallic catalytic benefits. Herein, a bimetallic Pd II NHC/pyridine complex is synthesized utilizing a novel extended C 2 -symmetric bis-NHC ligand featuring 1,4-disubstituted ethynylbenzene as a central ligand platform. The complex was further employed for the preparation of a dinuclear complex possessing a combination of NHC and PPh 3 ligands. Dinuclear complexes have also been synthesized using a 1,4di(NHC)-substituted parent benzene ring platform with no acetylene linker units. The donor strengths of both bis-NHC ligands were compared with the help of 13 C and 31 P chemical shift values as probes. All of the bimetallic complexes were tested as precatalysts in the intermolecular α-arylation of 1-methyl-2-oxindole and Sonogashira coupling reactions. The dinuclear Pd II complexes with the ethynylbenzene-bridged bis-NHC ligand showed impressive catalytic outcomes that outweigh the catalytic outcomes obtained with dinuclear bis-NHC complexes possessing no such acetylene linkers. The corresponding mononuclear Pd II complexes were synthesized for comparison purposes utilizing both types of central ligand platforms. The dinuclear complexes appeared more active than the corresponding mononuclear complexes in catalysis. Furthermore, higher cooperative index values were obtained in catalysis using the dinuclear Pd II complexes with an acetylene-bridged bis-NHC ligand compared to those with no such acetylene linkers.

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Catalytic Benefits of an Ethynylphenyl-Based Pd^II Bis(NHC) over a Phenyl-Based Pd^II Bis(NHC): Insights into the Structural Aspects and Donor Strength Probing

Mondal,

Saha,

Naskar

et al. 2024

Inorg. Chem.

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Chromium(II)/(III) Complexes Bearing Phosphino-N-Heterocyclic Carbene and N-Chelating N-Heterocyclic Carbene Ligands and Their Use in Ethylene Oligomerization

Bhattacharya,

Atwi,

Kundu

et al. 2024

Organometallics

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Applications of metal N-heterocyclic carbene complexes in olefin polymerizations

Abstract: This review summarizes the progress in recent decades regarding the structure–activity relationships of various well-defined metal-NHC catalysts in the polymerization of olefins, particularly α-olefins, styrene, norbornene, and others.

Cited by 2 publications

References 102 publications

Catalytic Benefits of an Ethynylphenyl-Based Pd^II Bis(NHC) over a Phenyl-Based Pd^II Bis(NHC): Insights into the Structural Aspects and Donor Strength Probing

Catalytic Benefits of an Ethynylphenyl-Based Pd^II Bis(NHC) over a Phenyl-Based Pd^II Bis(NHC): Insights into the Structural Aspects and Donor Strength Probing

Chromium(II)/(III) Complexes Bearing Phosphino-N-Heterocyclic Carbene and N-Chelating N-Heterocyclic Carbene Ligands and Their Use in Ethylene Oligomerization

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Applications of metal N-heterocyclic carbene complexes in olefin polymerizations

Abstract: This review summarizes the progress in recent decades regarding the structure–activity relationships of various well-defined metal-NHC catalysts in the polymerization of olefins, particularly α-olefins, styrene, norbornene, and others.

Cited by 2 publications

References 102 publications

Catalytic Benefits of an Ethynylphenyl-Based PdII Bis(NHC) over a Phenyl-Based PdII Bis(NHC): Insights into the Structural Aspects and Donor Strength Probing

Catalytic Benefits of an Ethynylphenyl-Based PdII Bis(NHC) over a Phenyl-Based PdII Bis(NHC): Insights into the Structural Aspects and Donor Strength Probing

Chromium(II)/(III) Complexes Bearing Phosphino-N-Heterocyclic Carbene and N-Chelating N-Heterocyclic Carbene Ligands and Their Use in Ethylene Oligomerization

Contact Info

Product

Resources

About

Catalytic Benefits of an Ethynylphenyl-Based Pd^II Bis(NHC) over a Phenyl-Based Pd^II Bis(NHC): Insights into the Structural Aspects and Donor Strength Probing

Catalytic Benefits of an Ethynylphenyl-Based Pd^II Bis(NHC) over a Phenyl-Based Pd^II Bis(NHC): Insights into the Structural Aspects and Donor Strength Probing