Synthesis of ferrocene‐containing <i>N</i>‐aryloxo β‐ketoiminate lanthanide complexes and polymerization of ε‐caprolactone

Huang, Lingling; Han, Xiang-Zong; Yao, Yingming; Zhang, Yong; Shen, Qi

doi:10.1002/aoc.1788

Cited by 19 publications

(3 citation statements)

References 46 publications

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“…Further study of such model systems will provide information on the influence of various factors on redox processes, including the electron transfer process, which is a fundamental stage of many chemical reactions and is of crucial importance in many catalytic and biochemical processes, including photosynthesis, respiration, the transmission of nerve impulses, etc. L R -ferrocenyl-containing β-ketoiminate ligand 13--14 [111,112] (Fc-C 6 H 4 -CH=CH)Ru(acac-R)(PiPr 3 ) 2 (CO) acac-R-disubstituted β-diketonate ligand 14 [113] RR' Fc-CH=CH-PTF PTF-perchlorotriphenylmethyl radical 15 [114][115][116][117] (L N4 -Fc)Ni (Fc-L N4 -Fc)Ni L N4 -Fc and Fc-L N4 -Fc-mono-and diferrocenyl-containing macrocyclic ligands based on dibenzo [1,4,8,11]tetraazacyclotetradecines 15 [118] FcS 4 dt(Me) 2 and FcS 4 dt[Pt(t-Bu 2 bpy)] FcS 4 dt(Me) 2 -1,1 -ferrocenyl-containing redox-active dithiolene type ligand 16 [119] (pFlip)Pd pFlip-ferrocene-containing bis-o-aminophenol 16 [120] ferrocenyl-amide-p-benzoquinone -17 [128] ferrocenyl-acetylene-benzodioxines -17 [123] ferrocenyl…”

Section: Discussionmentioning

confidence: 99%

“…The ferrocene substituent can also be linked to the metal centre via the β-ketoiminate ligand [111,112] which, entering into the elimination reaction with lanthanide silylamides, forms the corresponding complexes [L R LnN(SiMe3)2(THF)]2 (Scheme 20). The redox properties of these complexes have not been studied.…”

Section: Scheme 17 Synthesis Of Antimony(v) and Tin(iv) Complexes Bas...mentioning

confidence: 99%

“…Still, the authors found that such lanthanide complexes, stabilized by a ferrocene-containing β-ketoiminate ligand, L R H2, can initiate ring-opening during the polymerization of ε-caprolactone and give polymers with a high molecular weight and a broad mass distribution. The ferrocene substituent can also be linked to the metal centre via the β-ketoiminate ligand [111,112] which, entering into the elimination reaction with lanthanide silylamides, forms the corresponding complexes [L R LnN(SiMe 3 ) 2 (THF)] 2 (Scheme 20). The redox properties of these complexes have not been studied.…”

Section: Scheme 17 Synthesis Of Antimony(v) and Tin(iv) Complexes Bas...mentioning

confidence: 99%

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Heteroligand Metal Complexes with Extended Redox Properties Based on Redox-Active Chelating Ligands of o-Quinone Type and Ferrocene

Baryshnikova

Poddel’sky

2022

Molecules

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A combination of different types of redox-active systems in one molecule makes it possible to create coordination compounds with extended redox abilities, combining molecular and electronic structures determined by the features of intra- and intermolecular interactions between such redox-active centres. This review summarizes and analyses information from the literature, published mainly from 2000 to the present, on the methods of preparation, the molecular and electronic structure of mixed-ligand coordination compounds based on redox-active ligands of the o-benzoquinone type and ferrocenes, ferrocene-containing ligands, the features of their redox properties, and some chemical behaviour.

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Section: Discussionmentioning

confidence: 99%

Section: Scheme 17 Synthesis Of Antimony(v) and Tin(iv) Complexes Bas...mentioning

confidence: 99%

Section: Scheme 17 Synthesis Of Antimony(v) and Tin(iv) Complexes Bas...mentioning

confidence: 99%

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Heteroligand Metal Complexes with Extended Redox Properties Based on Redox-Active Chelating Ligands of o-Quinone Type and Ferrocene

Baryshnikova

Poddel’sky

2022

Molecules

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Controlled Polymerization of ϵ‐Caprolactone using Aluminum and Zinc Complexes with Iminophosphorane Ligands

Zhang

Wang

2020

ChemistrySelect

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Several novel aluminum complexes [Al(R1)2{o‐O C(R)=C(H)P(Ph2)=N)C6H4(3,5‐Me2 ‐pyrazolyl)} (R=Ph, R1=Me, 3; R=Ph, R1=Et, 4; R=tBu, R1=Me, 5) had been prepared. These aluminum complexes were structurally characterized by nuclear magnetic resonance spectroscopy (1H, 13C and 31P) and elemental analyses. The aluminum complex 3 was determined by X‐ray diffraction. The catalytic activities of the aluminum complexes towards the ring‐opening polymerization (ROP) of ϵ‐caprolactone (ϵ‐CL) were investigated. Catalysis of two known zinc complexes with the same ligands, [Zn(Et) {o‐(OC(R)=C(H)P(Ph2)=N)C6H4(3,5‐Me2‐pyrazolyl)}] (R=Ph, 6; R=tBu, 7), in the ROP of ϵ‐CL was also determined. The catalytic results show that these complexes are effective catalysts in the ROP of ϵ‐CL. Kinetics of the polymerization was studied. These polymerizations reaction are consistent with the first‐order kinetic equation. The molecular weight of the polycaprolactone (PCL) is linear with the monomer conversion, and the molecular weight distribution is narrow. These kinetic studies confirm that the catalytic process is controllable.

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Synthesis, Structure, and Catalytic Behavior of Ytterbium Complexes Derived from a Linked Bis(β‐ketoiminato) Ligand

Fan

Wang

Yao

et al. 2013

Zeitschrift anorg allge chemie

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Ytterbium complexes supported by a linked bis(β‐ketoiminato) ligand, N,N′‐ethylenebis(benzoylacetoimine) (H2L), were synthesized and their catalytic behavior was explored. The reaction of YbCl3 with 1 equiv. of LLi2 afforded the mononuclear ytterbium chloride LYbCl(THF)2 (1) in high yield. Complex 1 can be used as starting material to prepare β‐ketoiminate‐ytterbium derivatives. Treatment of complex 1 with NaN(SiMe3)2 produced the dimeric ytterbium amide {LYb[N(SiMe3)2]}2 (2), while the similar reaction of complex 1 with NaOAr (ArO = 2, 6‐tBu‐4‐MeC6H2O) led to the mononuclear ytterbium aryloxide LYbOAr(THF) (3). The three complexes were well detected by elemental analysis and single‐crystal X‐ray analysis. It was found that complexes 2 and 3 can initiate the ring‐opening polymerization of ϵ‐caprolactone with moderate activity.

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Synthesis of ferrocene‐containing N‐aryloxo β‐ketoiminate lanthanide complexes and polymerization of ε‐caprolactone

Cited by 19 publications

References 46 publications

Heteroligand Metal Complexes with Extended Redox Properties Based on Redox-Active Chelating Ligands of o-Quinone Type and Ferrocene

Heteroligand Metal Complexes with Extended Redox Properties Based on Redox-Active Chelating Ligands of o-Quinone Type and Ferrocene

Controlled Polymerization of ϵ‐Caprolactone using Aluminum and Zinc Complexes with Iminophosphorane Ligands

Synthesis, Structure, and Catalytic Behavior of Ytterbium Complexes Derived from a Linked Bis(β‐ketoiminato) Ligand

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