Journal ArticleDOI
Salalen: a hybrid Salan/Salen tetradentate [ONNO]-type ligand and its coordination behavior with group IV metals
TLDR
A straightforward synthesis of Salalens, tetradentate [ONNO]-type ligands comprised of an amine-phenolate and an iminephenolate subunit is introduced in this paper, where the Salalen ligand precursor reacted with titanium(IV) ethoxide and with tetrakis(dimethylamido)zirconium to yield the corresponding [(Salalen)MX2]-type C1-symmetric complexes in a single isomeric form.About:
This article is published in Inorganic Chemistry Communications.The article was published on 2004-02-01. It has received 97 citations till now.read more
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Journal ArticleDOI
Structurally well-defined group 4 metal complexes as initiators for the ring-opening polymerization of lactide monomers
Andreas Sauer,Andreas Kapelski,Christophe Fliedel,Christophe Fliedel,Samuel Dagorne,Moshe Kol,Jun Okuda +6 more
TL;DR: This perspective summarizes various classes of structurally well-defined group 4 metal initiators developed for lactide ROP and provides observed trends regarding their catalytic performance.
Journal ArticleDOI
Gradient isotactic multiblock polylactides from aluminum complexes of chiral salalen ligands.
TL;DR: Poly(lactic acid) featuring the new gradient isotactic multiblock microstructure was synthesized by isoselective catalysts, which operate by a combination of enantiomorphic-site and chain-end control mechanisms.
Journal ArticleDOI
Synthesis of an optically active Al(salalen) complex and its application to catalytic hydrophosphonylation of aldehydes and aldimines.
TL;DR: Optically active aluminum(salalen) complex 2 was newly synthesized in a modular synthetic manner, and it was found to serve as an efficient catalyst for hydrophosphonylation of aldehydes and aldimines, giving the corresponding alpha-hydroxy and alpha-amino phosphonates with high enantioselectivity, respectively.
Journal ArticleDOI
Asymmetric catalysis of metal complexes with non-planar ONNO ligands: salen, salalen and salan
TL;DR: This Feature Article summarizes the seminal studies on asymmetric catalysis of non-planar M(ONNO) complexes, full utilization of which will provide marked improvement in asymmetric synthesis.
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Zirconium and Titanium Diamine Bis(phenolate) Catalysts for α-Olefin Polymerization: From Atactic Oligo(1-hexene) to Ultrahigh-Molecular-Weight Isotactic Poly(1-hexene)
TL;DR: Aiming at higher activities of group IV diamine bis(phenolate) catalysts in olefin polymerization, ligands containing electron-withdrawing groups have been introduced.
References
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Journal ArticleDOI
Advances in non-metallocene olefin polymerization catalysis.
TL;DR: The graph below shows the progression of monoanionic and non-monoanionic ligands through the history of synthesis, as well as some of the properties that have been identified since the discovery of R-Diimine.
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Isospecific Living Polymerization of 1-Hexene by a Readily Available Nonmetallocene C2-Symmetrical Zirconium Catalyst
TL;DR: In this article, a nonmetallocene C2symmetrical complex was proposed for the polymerization of 1-hexene, which can be synthesized by a one-pot Mannich condensation between di(secondary) amines, formaldehyde, and substituted phenols.
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Development of a Diversity-Based Approach for the Discovery of Stereoselective Polymerization Catalysts: Identification of a Catalyst for the Synthesis of Syndiotactic Polypropylene
Jun Tian,Geoffrey W. Coates +1 more
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Recent Advances in Phenoxy-Based Catalysts for Olefin Polymerization
TL;DR: In this article, the phenoxy-based catalysts have opened up a new dimension in the fields of olefin polymerization catalysis and polymer synthesis and thus have offered opportunities to make polyolefinic materials that are difficult or impossible to prepare using conventional catalysts.
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Achiral tetrahydrosalen ligands for the synthesis of C(2)-symmetric titanium complexes: a structure and diastereoselectivity study.
TL;DR: Tetrahydrosalen ligands employed in the synthesis of chiral C(2)-symmetric titanium complexes resulted in a maximum diastereoselectivity of 2:1, and X-ray structures of 3a and 3b indicate that the bonding of the tetraisopropoxide ligand to titanium is different than the bonded of salen ligAND to titanium.