𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Polymerization of 1,3-butadiene, 4-methyl-1,3-pentadiene and styrene with catalyst systems based on biscyclopentadienyl derivatives of titanium

✍ Scribed by Giovanni Ricci; Carlo Bosisio; Lido Porri

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
233 KB
Volume
17
Category
Article
ISSN
1022-1336

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

1,3‐Butadiene, 4‐methyl‐1,3‐pentadiene and styrene were polymerized with dicyclopentadienyltitanium dichloride/methylaluminoxane (Cp~2~TiCl~2~/MAO) and dicyclopentadienyltitanium chloride/MAO (Cp~2~TiCl/MAO). These systems are less active than cyclopentadienyltitanium trichloride/MAO (CpTiCl~3~/MAO), but show the same stereospecificity as the latter; they give predominantly cis‐1,4‐polybutadiene, 1,2‐syndiotactic poly(4‐methyl‐1,3‐pentadiene) and syndiotactic polystyrene. Cp~2~TiCl/MAO is much more active than Cp~2~TiCl~2~/MAO; this is probably due to the fact that in the reaction of Cp~2~TiCl~2~ with MAO, only a small amount of Ti(IV) is reduced to Ti(III), which is the active species in the polymerization of styrene and 1,3‐dienes. An interpretation of the structure of the active species in Cp~2~TiCl/MAO is reported.

📜 SIMILAR VOLUMES

Chemoselectivity in 4-methyl-1,3-pentadi
Chemoselectivity in 4-methyl-1,3-pentadiene polymerization in the presence of homogeneous Ti-based catalysts
✍ Pasquale Longo; Fabia Grisi; Antonio Proto; Adolfo Zambelli 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 267 KB

## Abstract The homogeneous catalyst CpTiCl~3~‐MAO is able to produce a random copolymer of 4‐methyl‐1,3‐pentadiene with ethylene. ^13^C NMR analysis of the copolymers shows that after insertion of ethylene units, the next 4‐ymethyl‐1,3‐pentadiene unit can be inserted in either 1,2 or 1,4 arrangeme

Polymerization of 4-Methyl-1,3-pentadien
Polymerization of 4-Methyl-1,3-pentadiene with Catalysts Based on Cyclopentadienyl Titanium Chlorides: Effect of anti/syn Isomerism of the Allylic Group on the Chemoselectivity and the Role of Backbiting Coordination in 1,3-Diene Polymerization
✍ Cecilia Cugini; Ottavio A. Rombolà; Antonino Giarrusso; Lido Porri; Giovanni Ric 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 117 KB

## Abstract **Summary:** Homopolymerization of 4‐methyl‐1,3‐pentadiene (MP) and copolymerization of 4‐methyl‐1,3‐pentadiene with alkenes (ethylene, 1‐pentene, 4‐methyl‐1‐pentene) were performed to investigate the effect of the so‐called backbiting coordination on the chemoselectivity of 1,3‐diene p

ChemInform Abstract: Formal [4 + 3], [4
ChemInform Abstract: Formal [4 + 3], [4 + 2], [4 + 1] and [2 + 1] Cycloadditions and Acid—Base Reaction of 2-Methyl-1,3-dimorpholino-1,3-butadiene with Fischer Carbene Complexes.
✍ J. BARLUENGA; F. AZNAR; M. FERNANDEZ 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 39 KB 👁 1 views

## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v

Synthesis and polymerization behavior of
Synthesis and polymerization behavior of 2,3-dihydro-1,4-dioxin-2-one and its 3-methyl derivative
✍ Günter Wulff; Kai Jakoby 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 377 KB

## Abstract The hitherto unknown 2,3‐dihydro‐1,4‐dioxin‐2‐one (7) and its 3‐methyl derivative 8 have been synthesized for the first time. The olefinic double bond is inserted into the saturated 1,4‐dioxanone precursors 3 and 6a/b by a retro‐Diels‐Alder reaction in the last step of the synthesis. Th