Neutral palladium(II) complexes with P,N Schiff-base ligands: Synthesis, characterization and catalytic oligomerisation of ethylene

Mogorosi, Mokgolela M.; Mahamo, Tebello; Moss, John R.; Mapolie, Selwyn F.; Slootweg, J. Chris; Lammertsma, Koop; Smith, Gregory S.

doi:10.1016/j.jorganchem.2011.07.042

Cited by 30 publications

(26 citation statements)

References 55 publications

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“…Similar trends are observed in the characterization data of both the reported palladium dichloride [29] and palladium chloromethyl complexes (Table 1). In the 1 H NMR spectra of the chloromethyl complexes, the signals for the imine protons appear as singlets in the region d 8.16e8.80 ppm (Table 1).…”

Section: Preparation Of the Pd(p^n)mecl Complexes 3ae3esupporting

confidence: 84%

“…Upon ligand coordination there is an upfield shift from d 8.98e9.05 ppm (observed in the free ligand) and this upfield shift has been attributed to the conformational change that occurs in the ligand upon chelation [15,19,21d]. A similar trend was observed for the dichloride complexes, where an upfield shift of the signals for the imine protons to d 8.52e8.84 ppm was observed [29]. As in the dichloride complexes, a downfield shift to d 5.09e5.49 ppm is observed for the methylene protons (N-CH 2 eR) upon chelation.…”

Section: Preparation Of the Pd(p^n)mecl Complexes 3ae3ementioning

confidence: 62%

“…We recently reported the preparation and characterization of the iminophosphine ligands 1ae1e as well as their palladium dichloride complexes 2ae2e and the activity of these complexes as pre-catalysts in ethylene oligomerisation reactions [29]. In this report, we present the preparation and characterization of analogous palladium chloromethyl complexes (3ae3e) based on the same ligands and investigate the application of both types of complexes in the SuzukieMiyaura reaction (Scheme 1).…”

Section: Preparation Of the Iminophosphine Ligands 1ae1e And Complexementioning

confidence: 98%

“…Preparation of iminophosphine palladium dichloride (2ae2e) [29] and chloromethyl complexes (3ae3e). chloromethyl complexes (51.0e52.1 ppm) than it is for the dichloride complexes (44.2e49.7 ppm).…”

Section: Preparation Of the Pd(p^n)mecl Complexes 3ae3ementioning

confidence: 99%

“…We recently reported the use of well-defined neutral iminophosphine Pd(II) complexes in ethylene oligomerization reactions [29]. We, herein, report the use of these complexes with hemilabile iminophosphine ligands as pre-catalysts in SuzukieMiyaura coupling reactions using low catalyst loadings under relatively mild reaction conditions.…”

Section: Introductionmentioning

confidence: 99%

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Neutral palladium(II) complexes with P,N Schiff-base ligands: Synthesis, characterization and application as Suzuki–Miyaura coupling catalysts

Mahamo

Mogorosi

Moss

et al. 2012

Journal of Organometallic Chemistry

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Section: Preparation Of the Pd(p^n)mecl Complexes 3ae3esupporting

confidence: 84%

Section: Preparation Of the Pd(p^n)mecl Complexes 3ae3ementioning

confidence: 62%

Section: Preparation Of the Iminophosphine Ligands 1ae1e And Complexementioning

confidence: 98%

Section: Preparation Of the Pd(p^n)mecl Complexes 3ae3ementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Neutral palladium(II) complexes with P,N Schiff-base ligands: Synthesis, characterization and application as Suzuki–Miyaura coupling catalysts

Mahamo

Mogorosi

Moss

et al. 2012

Journal of Organometallic Chemistry

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New iminophosphine–Ru(II) complexes and their application in hydrogenation and transfer hydrogenation

Keleş

Sahinoglu

Emir

et al. 2014

Applied Organom Chemis

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Ruthenium complexes [RuCl2L2] were prepared by treating [RuCl2(p‐cymene)]2 with structurally similar N‐(2‐(diphenylphosphino)benzylidene)‐3‐methylpyridin‐2‐amine, 4‐(2‐(diphenylphosphino)benzylideneamino)‐3‐methylphenol and 4‐(2‐(2‐(diphenylphosphino)benzylideneamino)ethyl)phenol refluxed in toluene. These complexes were used as catalysts for the transfer hydrogenation of acetophenones in 2‐propanol and for the direct hydrogenation of styrenes under hydrogen pressure. The results of the catalytic studies provide evidence that these complexes function as excellent catalysts for hydrogenation and transfer hydrogenation. Copyright © 2014 John Wiley & Sons, Ltd.

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Palladium (II) complexes chelated by 1‐substituted‐4‐pyridyl‐1H‐1,2,3‐triazole ligands as catalyst precursors for selective ethylene dimerization

Joseph

Swarts

Mapolie

2020

Applied Organom Chemis

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A series of neutral as well as cationic palladium methyl complexes bearing 1‐substituted‐4‐pyridyl‐1H‐1,2,3‐triazole ligands were prepared and fully characterized by a range of analytical techniques. Conventional and 2D NMR spectroscopy as well as single‐crystal X‐ray diffraction analysis unambiguously determined the molecular structure of the complexes. The neutral complexes activated by methylaluminoxane were found to be effective catalysts in the ethylene dimerization reaction. The catalyst performance of the in‐situ‐generated active species was compared with the discrete cationic complexes of the same ligand scaffold. Activities and selectivities for the two systems were remarkably similar, pointing to similarities in the nature of the active species. Both catalytic systems showed a strong correlation of activity and selectivity with the nature of the ligand scaffold. Highest activities were attained when electron‐withdrawing groups were incorporated into the triazole ring, while increasing steric bulk in the ortho‐position on the pyridyl ring of the ligand led to the almost exclusive dimerization of ethylene with selectivities up to 94% observed toward 1‐butene.

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Neutral palladium(II) complexes with P,N Schiff-base ligands: Synthesis, characterization and catalytic oligomerisation of ethylene

Cited by 30 publications

References 55 publications

Neutral palladium(II) complexes with P,N Schiff-base ligands: Synthesis, characterization and application as Suzuki–Miyaura coupling catalysts

Neutral palladium(II) complexes with P,N Schiff-base ligands: Synthesis, characterization and application as Suzuki–Miyaura coupling catalysts

New iminophosphine–Ru(II) complexes and their application in hydrogenation and transfer hydrogenation

Palladium (II) complexes chelated by 1‐substituted‐4‐pyridyl‐1H‐1,2,3‐triazole ligands as catalyst precursors for selective ethylene dimerization

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