Issue 15, 2012
From the journal:

Dalton Transactions

Synthesis, structure, and ethylenepolymerization behavior of nickel complexes based on benzoylmethylenetri(2-alkoxylphenyl)phosphorane†

Da-Wei Wan,a   Yan-Shan Gao,b   Jun-Fang Li,b   Qi Shen,a   Xiu-Li Sun*b  and  Yong Tangb  

* Corresponding authors

a State Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, People's Republic of China, China
E-mail: qshen@suda.edu.cn
Fax: +86 512 65880305
Tel: +86 512 65882806

b State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, China
E-mail: xlsun@sioc.ac.cn

Abstract

Several new nickel complexes are prepared by the treatment of the stabilized ylide benzoylmethylenetri(2-alkoxylphenyl)phosphorane with Ni(cod)2 in the presence of PPh3. X-Ray diffraction studies reveal that a distorted square planar geometry around Ni(II) is adopted. Upon treatment with Ni(cod)2, the nickel complexes are sufficiently robust for ethylene polymerization. The existence of 2-alkoxyl-aryl substituents on phosphorus improves the catalytic activities. The highest activity (2.1 × 106 g mol−1 h−1) is achieved when tri(2-isopropoxy-phenyl)phosphorane is employed (5e), which is one order higher than the corresponding SHOP catalyst. NMR analysis shows that the polyethylene mainly contains terminal double bonds and is highly linear.

Graphical abstract: Synthesis, structure, and ethylene polymerization behavior of nickel complexes based on benzoylmethylenetri(2-alkoxylphenyl)phosphorane

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Article information

DOI
https://doi.org/10.1039/C2DT12052F
Article type
Paper
Submitted
28 Oct 2011
Accepted
12 Jan 2012
First published
27 Feb 2012

Dalton Trans., 2012,41, 4552-4557

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Synthesis, structure, and ethylene polymerization behavior of nickel complexes based on benzoylmethylenetri(2-alkoxylphenyl)phosphorane

D. Wan, Y. Gao, J. Li, Q. Shen, X. Sun and Y. Tang, Dalton Trans., 2012, 41, 4552 DOI: 10.1039/C2DT12052F

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