Title :

Isoprene polymerization mediated by vanadium-[ONNO] complexes

Author(s) :

Phuphuak, Yupin [Auteur]
Bonnet, Fanny [Auteur]
Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
Vendier, Laure [Auteur]
Lorber, Christian [Auteur]
Zinck, Philippe [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

Journal title :

Dalton Transactions

Volume number :

45

Pages :

12069-12077

Publisher :

Royal Society of Chemistry

Publication date :

2016-08-14

HAL domain(s) :

Chimie/Catalyse
Chimie/Chimie de coordination
Sciences de l'ingénieur [physics]/Matériaux
Sciences de l'ingénieur [physics]/Génie des procédés
Chimie/Matériaux
Chimie/Polymères

English abstract : [en]

A series of vanadium complexes bearing dianionic tetradentate amine-bisphenolate [ONNO] ligands, V([double bond, length as m-dash]O)X[ONNOMe] (X = Cl (1); OiPr (2)), VCl2[ONNOMe] (3) and V(OiPr)2[ONNOR] (R = Me (4), tBu ...
Show more >A series of vanadium complexes bearing dianionic tetradentate amine-bisphenolate [ONNO] ligands, V([double bond, length as m-dash]O)X[ONNOMe] (X = Cl (1); OiPr (2)), VCl2[ONNOMe] (3) and V(OiPr)2[ONNOR] (R = Me (4), tBu (5), Cl (6)), displaying various electronic and steric properties have been prepared. The molecular structures of two of these complexes, namely V[ONNOR](OiPr)2 with R = tBu (5) or Cl (6), are reported. Activated with dialkylmagnesium, all complexes lead to modest isoprene homo-polymerization activities at 50 °C. Quantitative polymerizations were observed using 4 and 6 as pre-catalysts combined with AliBu3. The resulting polyisoprene microstructure was composed of ca. 70% 3,4 enchainments, the remaining 30% 1,4 enchainments being a mixture of cis and trans stereoisomers. 6 leads to a more active catalyst than 4. β-Hydride abstraction occurs during the reaction.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

ENSCL
CNRS
INRA
Centrale Lille
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Catalyse de polymérisation
Catalyse et synthèse éco-compatible (CASECO)
Méthodologie organométallique pour la catalyse homogène (MOCAH)
Ingénierie des Systèmes Polymères

Submission date :

2019-09-25T14:04:44Z
2020-12-01T10:22:07Z