Neutral nickel complexes chelating monoamidinate ligands: Syntheses, characterizations and catalytic properties toward ethylene oligomerization and norbornene polymerization

Liu, Feng-Shou; Gao, Haiyang; Song, Keming; Zhao, Yulin; Long, Jieming; Zhang, Ling; Zhu, Fangming; Wu, Qing

doi:10.1016/j.poly.2008.12.019

Cited by 20 publications

(8 citation statements)

References 44 publications

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“…2,6‐iPr 2 C 6 H 3 ―;N―;C(Ph)―;NH―;Py ( L1 ), 2,6‐iPr 2 C 6 H 3 ―;N═;C(4‐CH 3 OC 6 H 4 )―;NH―;Py ( L2 ), 2,6‐iPr 2 C 6 H 3 ―;N═;C(4‐CH 3 C 6 H 4 )―;NH―;(4‐NO 2 ―;Py) ( L4 ) and 2,6‐iPr 2 C 6 H 3 ―;N═;C(4‐CH 3 C 6 H 4 )―;NH―;(5‐CH 3 ―;Py) ( L5 ) were synthesized according to our previous reports …”

Section: Methodsmentioning

confidence: 99%

Efficient pyridylbenzamidine ligands for palladium‐catalyzed Suzuki–Miyaura reaction

Huang

Tang

Yang

et al. 2012

Applied Organom Chemis

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A series of pyridylbenzamidine ligands were applied in palladium-catalyzed Suzuki-Miyaura reactions and the effect of ligand on catalytic properties was evaluated. Under the optimization conditions, the bulky and electron-donating nitrogen donor ligands were successfully used to catalyze the reaction of a variety of aryl bromides and aryl chlorides with arylboronic acid, giving the desired products in moderate to high yields.

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Section: Methodsmentioning

confidence: 99%

Efficient pyridylbenzamidine ligands for palladium‐catalyzed Suzuki–Miyaura reaction

Huang

Tang

Yang

et al. 2012

Applied Organom Chemis

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“…Amidines L 2 H and L 4 H have been previously prepared using a similar synthetic route, 20,21 and L 4 H has also been prepared via reaction of N-(2,6-diisopropylphenyl)benzimidoyl chloride and 2,6-diisopropylaniline. 21,29,32 Di-n-butylmagnesium was obtained from Aldrich as a 1.0 M solution in heptane. The solvent was removed in vacuo and n Bu 2 Mg was stored as a solid in the glove box.…”

Section: General Remarksmentioning

confidence: 99%

Synthesis and characterisation of magnesium complexes containing sterically demanding N,N′-bis(aryl)amidinate ligands

et al. 2014

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“…The design of new catalyst architectures based on amidinate ligands has often been guided by analogies. Thus, when considering early transition or f -block elements, amidinates are regarded as “steric equivalents” of the ubiquitous cyclopentadienyl ligands. , Although this concept loses usefulness upon moving to catalysts based on late transition elements, whose design is often inspired by the highly successful Ni and Pd α-diimine complexes, analogy reasoning remains useful because both α-diimine and amidinate chelates , are built on trigonal sp 2 nitrogen centers that can be similarly substituted with bulky organic groups, such as 2,6-dialkylaryls. The main difference between the α-diimine and amidinate families of ligands is the electric charge, which results in very different chemistries.…”

Section: Introductionmentioning

confidence: 99%

Copper(I) Complexes of Zwitterionic Imidazolium-2-Amidinates, a Promising Class of Electroneutral, Amidinate-Type Ligands

et al. 2015

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The first complexes containing imidazolium-2-amidinates as ligands (betaine-type adducts of imidazolium-based carbenes and carbodiimides, NHC-CDI) are reported. Interaction of the sterically hindered betaines ICyCDI(DiPP) and IMeCDI(DiPP) [both bearing 2,6-diisopropylphenyl (DiPP) substituents on the terminal N atoms] with Cu(I) acetate affords mononuclear, electroneutral complexes 1a and 1b, which contain NHC-CDI and acetate ligands terminally bound to linear Cu(I) centers. In contrast, the less encumbered ligand ICyCDI(p-Tol), with p-tolyl substituents on the nitrogen donor atoms, affords a dicationic trigonal paddlewheel complex, [Cu2(μ-ICyCDI(p-Tol))3](2+)[OAc(-)]2 (2-OAc). The nuclear magnetic resonance (NMR) resonances of this compound are broad and indicate that in solution the acetate anion and the betaine ligands compete for binding the Cu atom. Replacing the external acetate with the less coordinating tetraphenylborate anion provides the corresponding derivative 2-BPh4 that, in contrast with 2-OAc, gives rise to sharp and well-defined NMR spectra. The short Cu-Cu distance in the binuclear dication [Cu2(μ-ICyCDI(p-Tol))3](2+) observed in the X-ray structures of 2-BPh4 and 2-OAc, ca. 2.42 Å, points to a relatively strong "cuprophilic" interaction. Attempts to force the bridging coordination mode of IMeCDI(DiPP) displacing the acetate anion with BPh4(-) led to the isolation of the cationic mononuclear derivative [Cu(IMeCDI(DiPP))2](+)[BPh4](-) (3b) that contains two terminally bound betaine ligands. Compound 3b readily decomposes upon being heated, cleanly affording the bis-carbene complex [Cu(IMe)2](+)[BPh4(-)] (4) and releasing the corresponding carbodiimide (C(═N-DiPP)2).

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Neutral nickel complexes chelating monoamidinate ligands: Syntheses, characterizations and catalytic properties toward ethylene oligomerization and norbornene polymerization

Cited by 20 publications

References 44 publications

Efficient pyridylbenzamidine ligands for palladium‐catalyzed Suzuki–Miyaura reaction

Efficient pyridylbenzamidine ligands for palladium‐catalyzed Suzuki–Miyaura reaction

Synthesis and characterisation of magnesium complexes containing sterically demanding N,N′-bis(aryl)amidinate ligands

Copper(I) Complexes of Zwitterionic Imidazolium-2-Amidinates, a Promising Class of Electroneutral, Amidinate-Type Ligands

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