Aluminium Complexes Bearing Pyrrolide Ligand as Efficient Catalysts for Ring‐Opening Polymerization of ε‐Caprolactone

Pei, Hao; Yang, Hua; Lü, Ning; Liu, Wei; Li, Yahong

doi:10.1002/zaac.201600464

Cited by 10 publications

(1 citation statement)

References 60 publications

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“…In our previous work, we have chosen pyrrole as an ancillary ligand to tune the activity of the complexes in the catalytic studies. Employing pyrrole as an ancillary ligand has always been a hot pot for chemists, due to a couple of considerations .…”

Section: Introductionmentioning

confidence: 99%

Group 4 Complexes Bearing Pyrrolide Ligand for Intramolecular Alkene Hydroamination and Activation of C≡N Bond

Jiang

Wang

Liu

et al. 2018

Zeitschrift anorg allge chemie

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Titanium and zirconium complexes supported by a pyrrolide ligand HL 1 [HL 1 = 2-cyano-1H-pyrrole], Ti 2 (L 2 ) 2 (NMe 2 ) 2 (1) and Zr 3 (L 2 ) 3 (NMe 2 ) 6 (2) [L 2 = N,N-dimethyl-1H-pyrrol-2-carboximidamide, NMe 2 -L 1 ] were synthesized and characterized. The ligand L 2 was generated by activation of CϵN bond of HL 1 with HNMe 2 . In complex 1, two Ti IV atoms are bridged by two nitrogen atoms. There

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Section: Introductionmentioning

confidence: 99%

Group 4 Complexes Bearing Pyrrolide Ligand for Intramolecular Alkene Hydroamination and Activation of C≡N Bond

Jiang

Wang

Liu

et al. 2018

Zeitschrift anorg allge chemie

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In‐situ Formation of a Dinuclear Al(III) Complex in Friedel‐Crafts Sulfoxidation of 2‐Naphthol with Thionyl Chloride

et al. 2019

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A new dinuclear Al(III) complex has been prepared by in situ Friedel-Crafts sulfoxidation of 2-naphthol with thionyl chloride (SOCl 2 ) and AlCl 3 as catalyst. The product was characterized by elemental analysis, spectroscopic methods and single crystal Xray analysis. X-ray diffraction indicated that the product is a centrosymmetric dinuclear Al(III) complex, [Al(bn)(μ À OCH 3 ) (CH 3 OH)] 2 (1), where bn 2À is a O 3 -donor 1,1'-sulfonylbis(naphtholate) ligand obtained by in situ reaction of materials. The coordination environment around the Al(III) ions is distorted octahedral (AlO 6 ) and the Al(III) ions are connected together by methoxy bridging ligands. Complex 1 crystallizes in triclinic system and Al(III)⋅⋅⋅Al(III) separation is 2.886(2) Å. The dimeric structure is stabilized by two intramolecular O À H⋅⋅⋅O hydrogen bonds, while the intermolecular interactions are provided by C-H⋅⋅⋅π and π-π contacts.

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Synthesis and Structural Characterisation of Dinuclear Aluminium Complexes Supported by NNO‐Tridentate Schiff‐Base Ligands and Their Catalysis in the Ring‐Opening Polymerisation of ϵ‐Caprolactone

Wang

Han

2021

ChemistrySelect

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In this study, we prepared a series of dinuclear aluminium complexes {Bis{2-OAlMe 2 -3-CH 2, and Bis{2-OAlMe 2 -3-CH=N[2-N(CH 3 ) 2 C 6 H 4 ]-5-CH 3 C 6 H 2 }CH 2 } as well as their corresponding mononuclear aluminium compounds derived from NNO-tridentate Schiff-base ligands. The compounds were characterised by 1 H and 13 C spectroscopy and elemental analyses. Complexes 4 and 7 were additionally characterised by single-crystal X-ray diffraction. Their activities toward the ring-opening polymerisation (ROP) of ε-caprolactone (ε-CL) were investigated. In the presence of benzyl alcohol (BnOH), these complexes are catalytically active for the ROP of ε-CL. The kinetic studies for the polymerisation catalysed by these complexes indicated that the polymerisation was well controlled and produced polymers within a narrow molecular weight distribution. At low monomer concentrations, the catalytic activity of binuclear complexes is considerably greater than that of mononuclear complexes.

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Aluminium Complexes Bearing Pyrrolide Ligand as Efficient Catalysts for Ring‐Opening Polymerization of ε‐Caprolactone

Cited by 10 publications

References 60 publications

Group 4 Complexes Bearing Pyrrolide Ligand for Intramolecular Alkene Hydroamination and Activation of C≡N Bond

Group 4 Complexes Bearing Pyrrolide Ligand for Intramolecular Alkene Hydroamination and Activation of C≡N Bond

In‐situ Formation of a Dinuclear Al(III) Complex in Friedel‐Crafts Sulfoxidation of 2‐Naphthol with Thionyl Chloride

Synthesis and Structural Characterisation of Dinuclear Aluminium Complexes Supported by NNO‐Tridentate Schiff‐Base Ligands and Their Catalysis in the Ring‐Opening Polymerisation of ϵ‐Caprolactone

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