Synthesis and structural study of an unsymmetrical aliphatic benzamidinato ligand and its use in the formation of selected Cu(i), Mg(ii) and Zr(iv) complexes

Fan, Mei Qiang; Yang, Qiaokun; Tong, Hongbo; Yuan, Shi-Jie; Jia, Bin; Guo, Dongyan; Zhou, Mingfei; Liu, Dian‐Sheng

doi:10.1039/c2ra20709e

Cited by 21 publications

(4 citation statements)

References 49 publications

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“…57 Five-coordinate magnesium centres (Fig. 8d) are adopted for guanidinate (VIII and IX) 23,27 and amidinate (X and XI) 23,58 species. In contrast, bis(solvated) compounds (Fig.…”

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confidence: 99%

Catalytic bond forming reactions promoted by amidinate, guanidinate and phosphaguanidinate compounds of magnesium

et al. 2014

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The synthesis and catalytic properties of a series of magnesium compounds consisting of monoanionic, N,N'-chelating ligands (N∩N = amidinates, guanidinates, phosphaguanidinates) is reported. The compounds were synthesized by (i) insertion of a carbodiimide into an existing Mg-C or Mg-N bond, or (ii) protonolysis of an organomagnesium compound by a neutral pre-ligand. Structural analyses of mono- or bis-(chelate) compounds with general formula Mg(N∩N)X(L)n and Mg(N∩N)2(L)n (X = halide, aryloxide, amide; L = Et2O, THF; n = 0, 1 or 2) have been performed and the influence that the ligand substituent patterns have on the solid-state structures has been probed. Selected examples of the compounds were tested as (pre)catalysts for the polymerization of lactide, the dimerization of aldehydes and the hydroacetylenation of carbodiimides.

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“…57 Five-coordinate magnesium centres (Fig. 8d) are adopted for guanidinate (VIII and IX) 23,27 and amidinate (X and XI) 23,58 species. In contrast, bis(solvated) compounds (Fig.…”

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confidence: 99%

Catalytic bond forming reactions promoted by amidinate, guanidinate and phosphaguanidinate compounds of magnesium

et al. 2014

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“…For a more intuitive comparison, the polymerization data of mono-amidinate and bis(amidinate) complexes are shown in Table 2. Zhou et al [25] reported that asymmetric aliphatic benzamidine zirconium complex 3 can be used for ethylene polymerization, exhibiting a high activity of 54.4 × 10 4 g-PE/mol-Zr•h. This method of combining asymmetric aromatic and chiral amidine ligands provides ideas for the design of new ligands.…”

Section: Amidinate Ligands Metal Complexesmentioning

confidence: 99%

Homogeneous Non-Metallocene Group 4 Metals Ligated with [N,N] Bidentate Ligand(s) for Olefin Polymerization

Wen,

Wu,

Chen

et al. 2024

Polymers

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The development of catalysts has significantly advanced the progress of polyolefin materials. In particular, group 4 (Ti, Zr, Hf) non-metallocene catalysts ligated with [N,N] bidentate ligand(s) have garnered increasing attention in the field of olefin polymerization due to their structurally stability and exceptional polymerization behaviors. Ligands containing nitrogen donors are diverse and at the core of many highly active catalysts. They mainly include amidine, guanidinato, diamine, and various N-heterocyclic ligands, which can be used to obtain a series of new polyolefin materials, such as ultrahigh molecular weight polyethylene (UHWMPE), olefin copolymers (ethylene/norbornene and ethylene/α-olefin) with high incorporations, and high isotactic or syndiotactic polypropylene after coordination with group 4 metals and activation by cocatalysts. Herein, we focus on the advancements and applications of this field over the past two decades, and introduce the catalyst precursors with [N,N] ligand(s), involving the effects of ligand structure, cocatalyst selection, and polymerization conditions on the catalytic activity and polymer properties.

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“…The Cu/Cu bond distance is comparable to the shortest seen in binuclear Cu(I) complexes bridged by anionic amidinate or guanidinate anions (2.40-2.54 Å). [55][56][57] In order to form a binuclear product similar to 5a and 5b with a DiPP-substituted adduct, IMeCDI DiPP was exposed to CuOAc in the presence of NaBPh 4 . Regardless of whether a 1 : 1 : 1 or 2 : 3 : 2 ratio of CuOAc : IMeCDI DiPP : NaBPh 4 was Fig.…”

Section: Nhc-cdis As Ligandsmentioning

confidence: 99%

N-Heterocyclic carbene–carbodiimide (NHC–CDI) betaine adducts: synthesis, characterization, properties, and applications

2021

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Synthesis and structural study of an unsymmetrical aliphatic benzamidinato ligand and its use in the formation of selected Cu(i), Mg(ii) and Zr(iv) complexes

Cited by 21 publications

References 49 publications

Catalytic bond forming reactions promoted by amidinate, guanidinate and phosphaguanidinate compounds of magnesium

Catalytic bond forming reactions promoted by amidinate, guanidinate and phosphaguanidinate compounds of magnesium

Homogeneous Non-Metallocene Group 4 Metals Ligated with [N,N] Bidentate Ligand(s) for Olefin Polymerization

N-Heterocyclic carbene–carbodiimide (NHC–CDI) betaine adducts: synthesis, characterization, properties, and applications

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