Control of molecular weight in Ni(ii)-catalyzed polymerization via the reaction medium

Guironnet, Damien; Rünzi, Thomas; Göttker‐Schnetmann, Inigo; Mecking, Stefan

doi:10.1039/b811888d

Cited by 66 publications

(43 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4 The polymerization behaviour of these complexes by comparison to 1a-DMSO at different ethylene pressures was studied. Polymerizations were performed in a water cooled S10 reactor at sufficient low catalyst loading to avoid reaction exotherms greater than 2 °C.…”

Section: Ethylene Polymerization With Ni(ii) Complexesmentioning

confidence: 99%

See 1 more Smart Citation

Insertion Polymerization of Acrylate

et al. 2008

Self Cite

View full text Add to dashboard Cite

Section: Ethylene Polymerization With Ni(ii) Complexesmentioning

confidence: 99%

“…4 Low molecular weight moderately branched material is formed. The activity observed for 1a-dmso exceeds that of the analogous Ncoordinated pyridine complex 1a-pyr and the tertiary amine complex 1a-tmeda, particularly at a low ethylene pressure.…”

Section: Ethylene Polymerization With Ni(ii) Complexesmentioning

confidence: 99%

Insertion Polymerization of Acrylate

et al. 2008

Self Cite

View full text Add to dashboard Cite

“…This is in sharp contrast to the fact that polyethylenes with high molecular weights (M n > 10 5 ) can be obtained either by tuning the substituents on the phosphorus atom 12,42,43 or by using nickel/phosphine sulfonate systems. 44,45 Furthermore, a trade-off relationship was observed between the molecular weight and the incorporation ratio; the molecular weight could be higher if low comonomer incorporation is acceptable, but if one would like to increase comonomer incorporation, then the resulting molecular weight would decrease severely. The decrease of molecular weights as comonomer incorporation ratio increases is attributed to the general trend that chain termination occurs more easily after polar monomer insertion rather than after ethylene insertion.…”

mentioning

confidence: 99%

Palladium-Catalyzed Homo- and Copolymerization of Polar Monomers: Synthesis of Aliphatic and Aromatic Polymers

Ito

2018

Bulletin of the Chemical Society of Japan

View full text Add to dashboard Cite

Transition-metal-catalyzed coordinationinsertion polymerization of olefins is an indispensable tool in polymer synthesis. When polar monomers with polar functional groups are employed, however, the catalysts are often deactivated owing to side reactions such as σ-coordination and β-elimination of the functional group. Nevertheless, recent progress in late transition metal catalysis has enabled the synthesis of many types of functional polymers from polar monomers through coordinationinsertion polymerization methods. This account describes our achievements in the palladium-catalyzed coordinationinsertion (co)polymerization of polar monomers for the syntheses of a variety of functional polymers, ranging from functionalized polyolefins via olefin/polar monomer copolymerization to o-arylene-containing polymers via formal aryne polymerization.

show abstract

“…b-Hydrogen elimination is favored The Ni-phosphinesulfonate complexes are also synthesized and used as the catalyst for ethylene polymerization. Ni-allyl [149], Ni-benzyl [150], and Ni-Me [151] complexes afford branched polyethylene with low molecular weight in toluene. In contrast, Ni-Me complex affords linear high molecular weight polyethylene in heptane or 1-octene [151].…”

Section: Phosphinesulfonate Complexes Of Pdmentioning

confidence: 99%

“…Ni-allyl [149], Ni-benzyl [150], and Ni-Me [151] complexes afford branched polyethylene with low molecular weight in toluene. In contrast, Ni-Me complex affords linear high molecular weight polyethylene in heptane or 1-octene [151]. The catalyst is stable for hours at 90°C during the polymerization.…”

Section: Phosphinesulfonate Complexes Of Pdmentioning

confidence: 99%

Olefin Polymerization with Non-metallocene Catalysts (Late Transition Metals)

Takeuchi

2014

Organometallic Reactions and Polymerization

View full text Add to dashboard Cite

Diimine Pd and Ni complexes catalyze the polymerization of ethylene, propylene, and a-olefins. The reaction involves isomerization of the growing terminal (chain walking) and, as its result, produces highly branched polyethylene and poy(a-olefin)s having a smaller number of the alkyl substituents than expected from the monomer structure. Ni complexes with salicylaldimine or iminocarboxamide ligands and Pd complexes with phosphinesulfonate ligands are used as single component catalysts for ethylene polymerization. Especially, the latter catalysts show tolerance towards polar functional groups and promote copolymerization of ethylene with wide varieties of polar monomers. The Pd and Ni complexes are able to catalyze ethylene polymerization in aqueous media to yield polyethylene particles. Fe and Co complexes with bis(imino)pyridine ligands show high catalytic activity for ethylene polymerization to yield linear polyethylene. Complexes of the metals such as Rh, Ir, Ru, and Ag were revealed to become catalytically active by proper design of the ligand. Not only monometallic complexes but also bimetallic or multimetallic complexes are used for ethylene polymerization. Late transition metal complexes catalyze selective cyclopolymerization of non-conjugated dienes and trienes to afford the polymers with cycloalkane groups with controlled stereochemistry.

show abstract

Control of molecular weight in Ni(ii)-catalyzed polymerization via the reaction medium

Cited by 66 publications

References 42 publications

Insertion Polymerization of Acrylate

Insertion Polymerization of Acrylate

Palladium-Catalyzed Homo- and Copolymerization of Polar Monomers: Synthesis of Aliphatic and Aromatic Polymers

Olefin Polymerization with Non-metallocene Catalysts (Late Transition Metals)

Contact Info

Product

Resources

About