Rare-earth metal bis(alkyl)s that bear a 2-pyridinemethanamine ligand: dual catalysis of the polymerizations of both isoprene and ethylene.
@article{Jian2012RareearthMB,
title={Rare-earth metal bis(alkyl)s that bear a 2-pyridinemethanamine ligand: dual catalysis of the polymerizations of both isoprene and ethylene.},
author={Zhongbao Jian and Dongmei Cui},
journal={Dalton transactions},
year={2012},
volume={41 8},
pages={
2367-73
}
}New pyridinemethanamido-ligated rare-earth metal bis(alkyl) complexes [C(5)H(4)N-CH(Me)-NC(6)H(3)((i)Pr)(2)]Ln(CH(2)SiMe(3))(2)(THF) (Ln = Sc (1), Y (2), Lu (3)) have been prepared at 0 °C via a protonolysis reaction between rare-earth metal tris(alkyl)s and the corresponding 2-pyridinemethanamine ligand and fully characterized by NMR and X-ray diffraction analysis. Bis(alkyl) complexes 1-3 are analogous monomers of THF solvate, where the ligand bonds to the metal center in a κN:κN-bidentate…
21 Citations
Synthesis and Reactivity of Rare-Earth-Metal Monoalkyl Complexes Supported by Bidentate Indolyl Ligands and Their High Performance in Isoprene 1,4-cis Polymerization
- Chemistry
- 2015
A series of novel rare-earth-metal monoalkyl complexes incorporating partially rotation restricted [N,N]-bidentate indolyl ligands were synthesized and characterized, and their reactivities and…
Rare-Earth-Metal Complexes Bearing Phosphazene Ancillary Ligands: Structures and Catalysis toward Highly Trans-1,4-Selective (Co)Polymerizations of Conjugated Dienes
- Chemistry
- 2013
The bis-arylated phosphazene compounds [HN(PPh2NAr)2] (Ar = phenyl (HL1), 2,6-dimethylphenyl (HL2), 2,6-diisopropylphenyl (HL3)) and the imidodiphosphinate compound HN(PPh2O)2 (HL4) have been…
Phosphazene-Functionalized Cyclopentadienyl and Its Derivatives Ligated Rare-Earth Metal Alkyl Complexes: Synthesis, Structures, and Catalysis on Ethylene Polymerization
- Chemistry
- 2012
Treatment of Ln(CH2SiMe3)3(thf)2 (Ln = Sc, Y, and Lu) with 1 equiv of CpPN-type ligands C5H4═PPh2–NH–C6H3R2 (R = Me, L1(Me); R = iPr, L1(iPr)) at room temperature readily generated the corresponding…
Carbon bridged triphenolate lanthanide complexes: synthesis, characterization, DFT studies and catalytic activities for isoprene polymerization.
- ChemistryDalton transactions
- 2015
These lanthanide complexes in combination with aluminum alkyls and [Ph3C](+)[B(C6F5)4](-) generated efficient homogeneous catalysts for the cis-1,4 polymerization of isoprene, with complex 1 having the best catalytic activity.
Sc(III) complexes with neutral N3- and SNS-donor ligands--a spectroscopic study of the activation of ethene polymerisation catalysts.
- ChemistryDalton transactions
- 2013
Scandium trichloride complexes with tridentate N(3)- and S(2)N-donor ligands (L(3)) have been synthesised and characterised by IR, microanalysis, and solid state and solution XAFS spectroscopy, indicating that alkylation at the Sc centre does not occur except in the presence of co-catalyst.
Living 3,4-(Co)Polymerization of Isoprene/Myrcene and One-Pot Synthesis of a Polyisoprene Blend Catalyzed by Binuclear Rare-Earth Metal Amidinate Complexes.
- ChemistryChemistry
- 2019
The binuclear bridged amidinate yttrium catalytic system not only exhibits the highest activity among the reported catalytic systems for 3,4-polymerization of isoprene but also allows the steady polymerization in a living manner from -20 to 80 °C.
C 1 and Cs 2-pyridylethylanilido zirconium(IV), yttrium(III) and lutetium(III) complexes: synthesis, characterization and catalytic activity in the isoprene polymerization
- Chemistry
- 2017
Neutral group-IV and rare-earth complexes stabilized by novel Cs and C1-symmetric 2-pyridylethylanilido ligands have been prepared and fully characterized before being scrutinized as catalyst…
Tuning the catalytic properties of rare earth borohydrides for the polymerisation of isoprene.
- ChemistryDalton transactions
- 2013
The X-ray structure of the already reported neodymium monomer compound Cp*Nd(BH(4)(2)(THF)(2) 1b is presented and the introduction of the NHC ligand in the coordination sphere of the complex induces a switch of the stereoselectivity of the resulting polymer.
Scandium and yttrium complexes of an hybrid phenoxy-amidopyridinate ligand. Use in ROP of racemic lactide
- Chemistry
- 2016
Organolanthanide Complexes Supported by Thiazole-Containing Amidopyridinate Ligands: Synthesis, Characterization, and Catalytic Activity in Isoprene Polymerization
- Chemistry
- 2014
Neutral bis(alkyl)-organolanthanide complexes supported by tridentate {N–,N,N} monoanionic 5-methylthiazole- or benzothiazole-amidopyridinate ligands have been prepared and completely characterized:…
References
SHOWING 1-10 OF 85 REFERENCES
New Rare Earth Metal Bis(alkyl)s Bearing an Iminophosphonamido Ligand. Synthesis and Catalysis toward Highly 3,4-Selective Polymerization of Isoprene
- Chemistry
- 2008
New rare earth metal bis(alkyl) complexes [(NPNPh)Ln(CH2SiMe3)2(THF)] (NPNPh: N(Ph)PPh2═NC6H2Me3-2,4,6; Ln = Sc (3a), Ln = Y (3b), Ln = Lu (3c)) and [(NPNPy)Sc(CH2SiMe3)2(THF)] (NPNPy =…
Half-sandwich bis(tetramethylaluminate) complexes of the rare-earth metals: synthesis, structural chemistry, and performance in isoprene polymerization.
- ChemistryChemistry
- 2008
The choice of rare-earth metal cation size, Cp(R) ancillary ligand, and type of boron cocatalyst crucially affects the polymerization performance, including activity, catalyst efficiency, living character, and polymer stereoregularity.
Highly Cis-1,4-Selective Living Polymerization of 1,3-Conjugated Dienes and Copolymerization with ε-Caprolactone by Bis(phosphino)carbazolide Rare-Earth-Metal Complexes
- Chemistry
- 2011
Bis(phosphino)carbazole, HL (HL = 3,6-(tBu)2-1,8-(PPh2)2-carbazole), reacted with rare-earth-metal tris(aminobenzyl) complexes (Ln(CH2C6H4N(Me)2-o)3) to afford the first PNP-carbazolide…
Synthesis and reactivity of rare earth metal alkyl complexes stabilized by anilido phosphinimine and amino phosphine ligands.
- ChemistryChemistry
- 2007
Anilido phosphinimino ancillary ligand H(2)L(1) reacted with one equivalent of rare earth metal trialkyl to afford rare earthMetal monoalkyl complexes to generate dianionic species L(1), and selectively, the C--H activation of the phenyl group is reversible.
A lutetium allyl complex that bears a pyridyl-functionalized cyclopentadienyl ligand: dual catalysis on highly syndiospecific and cis-1,4-selective (co)polymerizations of styrene and butadiene.
- Materials Science, ChemistryChemistry
- 2010
This represents the first example of a lutetium-based catalyst showing both high activity and selectivity for the (co)polymerization of styrene and butadiene.
Copolymerization of ethylene with norbornene catalyzed by cationic rare earth metal fluorenyl functionalized N-heterocyclic carbene complexes.
- ChemistryDalton transactions
- 2009
Higher activity was found for the copolymerization of ethylene and norbornene when using Sc based catalytic systems, which reached up to 5 x 5 x 10(6) g mol(Sc)(-1) h(-1) atm (-1) with 2a.
Highly cis-1,4 selective polymerization of dienes with homogeneous Ziegler-Natta catalysts based on NCN-pincer rare earth metal dichloride precursors.
- ChemistryJournal of the American Chemical Society
- 2008
The first aryldiimine NCN-pincer ligated rare earth metal dichlorides were successfully synthesized via transmetalation and shed new light on improving the catalytic performance of the conventional Ziegler-Natta catalysts for the specific selective polymerization of dienes.
Highly 3,4-Selective Polymerization of Isoprene with NPN Ligand Stabilized Rare-Earth Metal Bis(alkyl)s. Structures and Performances
- Chemistry
- 2009
Deprotonation of Ar1NHPPh2NAr2 (H[NPN]n, n = 1−10) by Ln(CH2SiMe3)3(THF)2 (Ln = Lu, Y, Sc, Er) generated a series of rare-earth metal bis(alkyl) complexes [NPN]nLn(CH2SiMe3)2(THF)2 (1−10), which…
Discrete Lanthanide Aryl(alk)oxide Trimethylaluminum Adducts as Isoprene Polymerization Catalysts
- Chemistry
- 2006
The structure−reactivity relationship of the rare-earth metal aryl(alk)oxide-promoted coordination polymerization of isoprene was investigated using binary initiating systems Ln(OR)3(AlMe3)x/Et2AlCl…


