Recent advances on α-diimine Ni and Pd complexes for catalyzed ethylene (Co)polymerization: A comprehensive review

Wu, Ruikai; Wu, Wenyu Klingler; Stieglitz, Lucas; Gaan, Sabyasachi; Rieger, Bernhard; Heuberger, Manfred

doi:10.1016/j.ccr.2022.214844

Cited by 57 publications

(36 citation statements)

References 162 publications

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“…Complexes of Ni are intensively being studied as efficient catalysts for the coordination oligomerization (SHOP process and beyond [ 46 , 261 , 262 ]) and polymerization [ 5 , 263 , 264 , 265 ] of α-olefins. Ni-based polymerization catalysts are very different from early transition metal (Ti, Zr, and V) complexes due to the lower sensitivity of Ni centers to electron-donor fragments, thus providing the copolymerization of α-olefins with polar vinyl monomers [ 266 , 267 ].…”

Section: Complexes Of Nimentioning

confidence: 99%

Transition Metal–(μ-Cl)–Aluminum Bonding in α-Olefin and Diene Chemistry

2022

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Olefin and diene transformations, catalyzed by organoaluminum-activated metal complexes, are widely used in synthetic organic chemistry and form the basis of major petrochemical processes. However, the role of M–(μ-Cl)–Al bonding, being proven for certain >C=C< functionalization reactions, remains unclear and debated for essentially more important industrial processes such as oligomerization and polymerization of α-olefins and conjugated dienes. Numerous publications indirectly point at the significance of M–(μ-Cl)–Al bonding in Ziegler–Natta and related transformations, but only a few studies contain experimental or at least theoretical evidence of the involvement of M–(μ-Cl)–Al species into catalytic cycles. In the present review, we have compiled data on the formation of M–(μ-Cl)–Al complexes (M = Ti, Zr, V, Cr, Ni), their molecular structure, and reactivity towards olefins and dienes. The possible role of similar complexes in the functionalization, oligomerization and polymerization of α-olefins and dienes is discussed in the present review through the prism of the further development of Ziegler–Natta processes and beyond.

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Section: Complexes Of Nimentioning

confidence: 99%

Transition Metal–(μ-Cl)–Aluminum Bonding in α-Olefin and Diene Chemistry

2022

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“…Though the Pd-catalyst yields a highly branched structure, the molecular weight is high and produces an amorphous rubbery material. 21,[23][24][25][26] In these α-diimine ligated metal catalysts, the bulky substituents on the ligand reduce the chain transfer and yield a high molecular weight polymer, [27][28][29][30] while less bulky substituents display low activity and produce hyperbranched low molecular weight oligomers. 31,32 In the 1990s, metal complexes with salicylaldimine ( phenoxy-imine) ligands were reported to be active in olefin polymerization.…”

Section: Introductionmentioning

confidence: 99%

Palladium-catalyzed polar solvent empowered synthesis of hyper-branched ethylene oligomers and their applications

Birajdar,

Gonnade,

Pol

et al. 2023

Polym. Chem.

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“…A variety of Lewis base-coordinated iminoboranes have been synthesized and structurally characterized in the past decade. [1][2][3][4][5][6][7][8][9][10][11] Given the wide utilization of imine-incorporated ligands, such as α-diimine, [12][13][14][15][16] β-diketiminato, [17][18][19] and bis(imino)pyridine [20][21][22][23] ligands in coordination chemistry and catalysis, Lewis base-coordinated iminoboranes appear to be another promising novel type of ligand system. However, the research on the coordination chemistry of Lewis base-coordinated iminoboranes is extremely rare, [5][6][7] probably due to the lack of available starting materials.…”

Section: Introductionmentioning

confidence: 99%