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Vinyl polymerization of norbornene with novel nickel (II) diphosphinoamine/methylaluminoxane catalytic system

✍ Scribed by Zhengguang Sun; Fangming Zhu; Qing Wu; Shang-an Lin

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
193 KB
Volume
20
Category
Article
ISSN
0268-2605

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✦ Synopsis

A new diphosphinoamine ligand [Ph 2 PN(p-C 6 H 4 OMe)PPh 2 ] was prepared through aminolysis reaction of p-methoxyaniline with Ph 2 PCl in the presence of NEt 3 . Consequently, the corresponding nickel (II) diphosphinoamine complex [(p-C 6 H 4 OMe)N(PPh 2 ) 2 NiCl 2 ] was synthesized and characterized. The solid-state structure of the complex was determined by single-crystal X-ray diffraction. As combined with methylaluminoxane (MAO), the complex displayed high catalytic activity for vinyl polymerization of norbornene.

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Vinyl polymerization of norbornene with
Vinyl polymerization of norbornene with pyrazolylimine nickel(II)/methylaluminoxane catalytic systems
✍ Yuan-Yuan Wang; Shang-An Lin; Fang-Ming Zhu; Hai-Yang Gao; Qing Wu πŸ“‚ Article πŸ“… 2008 πŸ› John Wiley and Sons 🌐 English βš– 89 KB πŸ‘ 1 views

## Abstract The polymerization of norbornene (NBE) was investigated in the presence of two novel pyrazolylimine nickel complexes [2‐(C~3~HN~2~Me~2~‐3,5){C(Ph)ο£Ύ[4‐R~2~C~6~H~2~(R~1~)~2~‐2,6]}NiBr~2~ (complex 1, R~1~ = ^i^Pr and R~2~ = H; complex 2, R~1~ = H and R~2~ = NO~2~)] activated by methylalumi

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Polymerization of styrene using catalytic systems based on nickel derivatives and methylaluminoxane (MAO) was studied. Among tested catalysts, nickel bis-(acetylacetonate) and nickel dichloride show the maximum activity. Bis(phosphine)nickel dichlorides exhibit lower activity, depending on the natur