Issue 10, 2009
From the journal:

Dalton Transactions

Oligomerization of styrenes mediated by cationic allyl nickel complexes containing triphenylstibine or triphenylarsine†

Manuel Jiménez-Tenorio,*a   M. Carmen Puerta,a   Isabel Salcedo,a   Pedro Valerga,*a   Isaac de los Ríosa  and  Kurt Mereiterb  

* Corresponding authors

a Departamento de Ciencia de Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, Cádiz, Spain
E-mail: manuel.tenorio@uca.es, pedro.valerga@uca.es
Fax: +34 956016288
Tel: +34 956016340

b Institute of Chemical Technologies and Analytics (E171), Vienna University of Technology, Getreidemarkt 9, Vienna, Austria

Abstract

The cationic complexes [Ni(η3-CH2C(R)CH2)(SbPh3)3][BAr′4] (R = CH31a, H 1b; Ar′ = 3,5-C6H3(CF3)2), [Ni(η3-CH2C(R)CH2)(AsPh3)2][BAr′4] (R = CH32a, H 2b), [Ni(η3-CH2CHCH2)(PPh3)(L)][BAr′4] (L = SbPh33, AsPh34), and the neutral derivatives [Ni(η3-CH2C(R)CH2)Br(L)] (L = SbPh3, R = CH35a, H 5b; L = AsPh3, R = CH36a, H 6b) have been prepared and characterized. The X-ray crystal structures of 1a-b, 2b, 3, 5a and 6b have been determined. These complexes are very active catalyst precursors for the low-molecular weight oligomerization of RC6H4CH[double bond, length as m-dash]CH2 to mainly dimers and trimers of styrene (R = H) or 4-methylstyrene (R = CH3). They also catalyse the oligomerization of α-methylstyrene to dimers and trimers, or to higher oligomers depending upon the reaction conditions (solvent and temperature). The oligomerization reactions were carried out at 25 °C in most cases, in dichloromethane, 1,2-dichloroethane or fluorobenzene, using a olefin/catalyst ratio equal to 2000. The oligomerization products were characterised by means of GPC/SEC.

Graphical abstract: Oligomerization of styrenes mediated by cationic allyl nickel complexes containing triphenylstibine or triphenylarsine

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Article information

DOI
https://doi.org/10.1039/B818784C
Article type
Paper
Submitted
23 Oct 2008
Accepted
28 Nov 2008
First published
27 Jan 2009

Dalton Trans., 2009, 1842-1852

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Oligomerization of styrenes mediated by cationic allyl nickel complexes containing triphenylstibine or triphenylarsine

M. Jiménez-Tenorio, M. Carmen Puerta, I. Salcedo, P. Valerga, I. de los Ríos and K. Mereiter, Dalton Trans., 2009, 1842 DOI: 10.1039/B818784C

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