Alkyl Complexes of Rare-Earth Metal Centers Supported by Chelating 1,1′-Diamidoferrocene Ligands: Synthesis, Structure, and Application in Methacrylate Polymerization

2008 ◽  
Vol 27 (4) ◽  
pp. 736-740 ◽  
Author(s):  
Jörg Eppinger ◽  
Katharina R. Nikolaides ◽  
Mei Zhang-Presse ◽  
Florian A. Riederer ◽  
Gerd W. Rabe ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Metal Centers ◽  
Alkyl Complexes ◽  
Complexes Of Rare Earth

C–H bond activation of N-heterocyclic carbene IMes by rare-earth metal alkyl complexes

2010 ◽  
Vol 695 (25-26) ◽  
pp. 2794-2797 ◽  
Author(s):  
Waldemar Fegler ◽  
Teruhiko Saito ◽  
Kazushi Mashima ◽  
Thomas P. Spaniol ◽  
Jun Okuda
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Bond Activation ◽  
Earth Metal ◽  
Alkyl Complexes

Synthesis of Carbamoylphosphates from Isocyanates Catalyzed by Rare-Earth-Metal Alkyl Complexes with a Silicon-Linked Diarylamido Ligand

2020 ◽  
Vol 39 (24) ◽  
pp. 4584-4591
Author(s):  
Xiancui Zhu ◽  
Dianjun Guo ◽  
Yiwei Zhang ◽  
Yun Wei ◽  
Shuangliu Zhou ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Alkyl Complexes

scholarly journals Unprecedentedly High Activity and/or High Regio-/Stereoselectivity of Fluorenyl-Based CGC Allyl-Type η3:η1-tert-Butyl(dimethylfluorenylsilyl)amido Ligated Rare Earth Metal Monoalkyl Complexes in Olefin Polymerization

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 836
Author(s):  
Ge Guo ◽  
Xiaolu Wu ◽  
Xiangqian Yan ◽  
Li Yan ◽  
Xiaofang Li ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Active Species ◽  
Metal Centers ◽  
Tert Butyl ◽  
Alkyl Groups ◽  
Elemental Analyses ◽  
Catalytically Active ◽  
Geometry Configuration

A series of fluorenyl-based constrained-geometry-configuration (CGC) allyl-type rare earth metal monoalkyl complexes bearing the divalent anionic η3:η1-tert-butyl(dimethylfluorenylsilyl)amido (η3:η1-FluSiMe2NtBu) ligand (η3:η1-FluSiMe2NtBu)Ln(CH2SiMe3)(THF)2 (1–3) have been synthesized via the alkane elimination reaction between the FluHSiMe2NHtBu ligand and rare earth metal tri(trimethylsilylmethyl) complexes Ln(CH2SiMe3)3(THF)n. Their structures are characterized by means of NMR spectrum, elemental analyses, and X-ray diffraction. These complexes 1–3 are isostructural and isomorphous, and each of them adopts a distorted-trigonal-bipyramidal configuration containing one η3:η1-FluSiMe2NtBu ligand, one CH2SiMe3 ligand, and two THF molecules. Unlike traditional CGC allyl-type rare earth metal complexes showing no or low activity and regio-/stereoselectivity in styrene or MMA polymerization, these complexes 1–3 exhibit high catalytic activities and/or high regio-/stereoselectivities in the cis-1,4-polymerization of isoprene and myrcene or in the syndiotactic polymerization of styrene under the aid of different activators (borate or borane) and AlR3. The in situ 1H NMR spectra suggest that the exchanges of chelating ligands such as alkyl groups and divalent anionic η3:η1-FluSiMe2NtBu ligands between rare earth metal centers and Al centers result in the formation of a heterobimetallic tetraalkylaluminate complex R2Al(μ-R)2Ln(R)(μ-R)2AlR2, which is activated by activators to form a divalent cationic species [Ln(μ-R)2AlR2]2+ as a catalytically active species in the coordination–insertion polymerization of olefins.

Rare‐Earth Metal Alkyl Complexes with 3‐Arylamido‐Functionalized Indolyl Ligands: Synthesis, Characterization and Reactivity †

2020 ◽  
Vol 38 (5) ◽  
pp. 478-488 ◽  
Author(s):  
Xiancui Zhu ◽  
Yuzhe Jiang ◽  
Jun Chen ◽  
Shaowu Wang ◽  
Zeming Huang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Alkyl Complexes

Synthesis and Structural Features of Boratabenzene Rare-Earth Metal Alkyl Complexes

2010 ◽  
Vol 29 (17) ◽  
pp. 3722-3728 ◽  
Author(s):  
Yuanyuan Yuan ◽  
Yaofeng Chen ◽  
Guangyu Li ◽  
Wei Xia
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Structural Features ◽  
Alkyl Complexes

Rare-earth metal bis(alkyl) complexes bearing pyrrolidinyl-functionalized cyclopentadienyl, indenyl and fluorenyl ligands: synthesis, characterization and the ligand effect on isoprene polymerization

2015 ◽  
Vol 39 (10) ◽  
pp. 7575-7581 ◽  
Author(s):  
Meng Deng ◽  
Shuhui Chi ◽  
Yunjie Luo
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Ligand Effect ◽  
Alkyl Complexes ◽  
Isoprene Polymerization

The ligand effect on isoprene polymerization was investigated using rare-earth metal bis(alkyl) complexes bearing pyrrolidinyl-functionalized cyclopentadienyl, indenyl and fluorenyl ligands.

Thermodynamic features of formation of monobutyrate complexes of rare-earth metal ions in the presence of Mg2+ ions

2004 ◽  
Vol 74 (9) ◽  
pp. 1454-1455
Author(s):  
I. V. Sukhno ◽  
M. M. Arutyunyan ◽  
V. Yu. Buz’ko ◽  
V. T. Panyushkin
Keyword(s):  
Rare Earth ◽  
Metal Ions ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Complexes Of Rare Earth
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