Multinuclear NMR Spectroscopic Characterization of a Fluorinated Enolatoimine Titanium Polymeryl Species in the Living Ethylene-co-Norbornene Polymerization
| Autor: | Laura Boggioni, Antonella Caterina Boccia, Giulia Scalcione, Incoronata Tritto |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Ethylene Organic Chemistry Methylaluminoxane chemistry.chemical_element FI CATALYSTS OLEFIN POLYMERIZATION Catalysis Inorganic Chemistry IMINE CHELATE LIGANDS chemistry.chemical_compound chemistry Polymerization Polymer chemistry Copolymer Non-covalent interactions Physical and Theoretical Chemistry COPOLYMERIZATION Titanium Norbornene |
| Zdroj: | Organometallics (Online) 33 (2014): 2510–2516. doi:10.1021/om500078r info:cnr-pdr/source/autori:Boccia A. C.; Scalcione G.; Boggioni L.; Tritto I./titolo:Multinuclear NMR Spectroscopic Characterization of a Fluorinated Enolatoimine Titanium Polymeryl Species in the Living Ethylene-coNorbornene Polymerization/doi:10.1021%2Fom500078r/rivista:Organometallics (Online)/anno:2014/pagina_da:2510/pagina_a:2516/intervallo_pagine:2510–2516/volume:33 |
| ISSN: | 1520-6041 0276-7333 |
| Popis: | A multinuclear NMR spectroscopic study was performed to assess the nature of species responsible for living ethylene (E)-norbornene (N) copolymerization reaction using the fluorinated enolatoimine titanium complex [Ti(?2-N,O-{2,6-F2C6H3N?C(Me)C(H)C(CF3)O})2Cl2] (1) activated with dry methylaluminoxane (d-MAO). The analysis involved (i) the catalytic system (1 with MAO); (ii) the species formed after simultaneous addition of 13C-enriched ethylene and norbornene and after further addition of 13C-enriched ethylene; and (iii) species formed during norbornene homopolymerization. The results supported the existence of noncovalent interactions of ortho-fluoroaryl substituents with the titanium center, which contribute to the living character of the copolymerization reaction. |
| Databáze: | OpenAIRE |
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