Highly 1,2-Selective Polymerization of 1,3-Butadiene with Rare-earth Metal Bis(alkyl)s Bearing an Iminophosphonamide Ligand

doi:10.3724/SP.J.1095.2012.20431

Chinese Journal of Applied Chemistry

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Highly 1,2-Selective Polymerization of 1,3-Butadiene with Rare-earth Metal Bis(alkyl)s Bearing an Iminophosphonamide Ligand

LIU Bo^1,2, LI Shihui², LI Danfeng², LV Kui², CUI Dongmei^2*, SUN Guangping^1*

(1.Key Laboratory of Automobile Materials of Ministry of Education,Department of
Materials Science and Engineering,Jilin University,Changchun 130025,China;
2.State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of
Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)

Received:2012-09-27 Revised:2012-10-16 Published:2012-12-10 Online:2012-12-10
Contact: DongMei Cui

Abstract

Abstract: Treatment of scandium tris(alkyl)s, Sc(CH2SiMe3)3(THF)2, with 2-Me-C6H4NHPPh2=NC6H2-2,4,6-Me3(NPNArH) via deprotonation affords the bis(alkyl) derivative[NPNAr]Sc(CH2SiMe3)2(THF). The complex structure was characterized by means of 1H NMR, 13C NMR, elemental analysis and X-ray diffraction analysis. Complex activated with [Ph3C][B(C6F5)4] and AliBu3 exhibited highly catalytic activity to the polymerization of butadiene. The 1,2-selectivity of polybutadiene noticeably increased with decrease of temperature. The molecular mass is 2.95 ×104 and the molecular mass distribution(Mw/Mn) is 1.65 at -75 ℃.

Key words: butadiene, selectivity, catalytic activity

CLC Number:

O632

LIU Bo1,2, LI Shihui2, LI Danfeng2, LV Kui2, CUI Dongmei2*, SUN Guangping1*. Highly 1,2-Selective Polymerization of 1,3-Butadiene with Rare-earth Metal Bis(alkyl)s Bearing an Iminophosphonamide Ligand[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2012.20431.

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Highly 1,2-Selective Polymerization of 1,3-Butadiene with Rare-earth Metal Bis(alkyl)s Bearing an Iminophosphonamide Ligand

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