Title :

Evidence of coordinative chain transfer polymerization of isoprene using iron iminopyridine/ZnEt ₂ catalytic systems

Author(s) :

Hashmi, Obaid-Hasan [Auteur]
Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181
Visseaux, Marc [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Champouret, Yohan [Auteur]
Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Journal title :

Polymer Chemistry

Abbreviated title :

Polym. Chem.

Volume number :

12

Pages :

4626-4631

Publication date :

2021

ISSN :

1759-9954, 1759-9962

HAL domain(s) :

Chimie/Chimie de coordination

English abstract : [en]

Isoprene polymerization using iminopyridine-supported iron complexes combined with Al i Bu3/[B(C6F5)4][CPh3] was carried out in the presence of ZnEt2 as chain transfer agent (CTA). Detailed studies revealed that the Mn of ...
Show more >Isoprene polymerization using iminopyridine-supported iron complexes combined with Al i Bu3/[B(C6F5)4][CPh3] was carried out in the presence of ZnEt2 as chain transfer agent (CTA). Detailed studies revealed that the Mn of the resulting polyisoprenes and the rate of polymerization decrease steadily as the amount of CTA increases while preserving the catalyst selectivity. These results highlight the first example of a reversible iron-mediated chain transfer polymerization of isoprene. a Polymerization conditions: 10 µmol of Fe(II) complex, isoprene/Fe/Al i Bu3/[Ph3C][B(C6F5)4] = 2 000/1/3/1, toluene = 20 mL, [C]isoprene = 1 mol/L, temperature = 25 °C. b Determined by size exclusion chromatography (SEC) analysis in THF using polystyrene standards, N chains = Mn(exp) without CTA/Mn(exp) with CTA. c Determined by 1 H NMR and 13 C NMR. d Isoprene/Fe/Al i Bu3/[B(C6F5)4][CPh3] = 500/1/3/1.Show less >

Language :

Anglais

Audience :

Non spécifiée

Popular science :

Non

Administrative institution(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Méthodologie organométallique pour la catalyse homogène (MOCAH)

Submission date :

2022-03-24T09:02:36Z
2024-01-15T16:09:20Z