NDLI: Small Changes Have Consequences: Lessons from Tetrabenzyltitanium and -zirconium Surface Organometallic Chemistry

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One-Step Synthesis of Racemic α-Amino Acids from Aldehydes, Amine Components, and Gaseous $CO_{2}$ by the Aid of a Bismetal Reagent

Small Changes Have Consequences: Lessons from Tetrabenzyltitanium and -zirconium Surface Organometallic Chemistry

Construction of Supramolecular Self-Assembled Microfibers with Fluorescent Properties through a Modified Ionic Self-Assembly (ISA) Strategy

Chiral Triazolium Salts and Ionic Liquids: From the Molecular Design Vectors to Their Physical Properties through Specific Supramolecular Interactions

Relating the Composition of $Pt_{x}Ru_{100−x}/C$ Nanoparticles to Their Structural Aspects and Electrocatalytic Activities in the Methanol Oxidation Reaction

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Small Changes Have Consequences: Lessons from Tetrabenzyltitanium and -zirconium Surface Organometallic Chemistry

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Taoufik, Mostafa Espinas, Jeff Maron, Laurent Del Rosal, Iker Macqueron, Benoît Szeto, Kai C. De Mallmann, Aimery Pelletier, Jérémie Popoff, Nicolas Boyron, Olivier Boisson, Christophe Gauvin, Régis M.
Description	Author Affiliation: Popoff N ( C2P2 (CNRS-UMR 5265), Université Lyon 1, ESCPE Lyon, 43 Boulevard du 11 Novembre 1918, 69626 Villeurbanne Cedex, France.)
Abstract	Homoleptic benzyl derivatives of titanium and zirconium have been grafted onto silica that was dehydroxylated at 200 and 700 °C, thereby affording bi-grafted and mono-grafted single-site species, respectively, as shown by a combination of experimental techniques (IR, MAS NMR, EXAFS, and elemental analysis) and theoretical calculations. Marked differences between these compounds and their neopentyl analogues are discussed and rationalized by using DFT. These differences were assigned to the selectivity of the grafting process, which, depending on the structure of the molecular precursors, led to different outcomes in terms of the mono- versus bi-grafted species for the same surface concentration of silanol species. The benzylzirconium derivatives were active towards ethylene polymerization in the absence of an activator and the bi-grafted species displayed higher activity than their mono-grafted analogues. In contrast, the benzyltitanium and neopentylzirconium counterparts were not active under similar reaction conditions.
ISSN	09476539
e-ISSN	15213765
Journal	Chemistry - A European Journal
Issue Number	3
Volume Number	19
Language	English
Publisher	Wiley-VCH;ChemPubSoc Europe
Publisher Date	2013-01-14
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Catalysis

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