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Citation: LIU Bo, LI Shihui, LI Danfeng, LV Kui, CUI Dongmei, SUN Guangping. 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, ;2012, 29(12): 1394-1398. doi: 10.3724/SP.J.1095.2012.20431 shu

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

LIU Bo ^a,b ,
LI Shihui ^b ,
LI Danfeng ^b ,
LV Kui ^b ,
CUI Dongmei ^b,c,, ,
SUN Guangping ^a

1.
a Key Laboratory of Automobile Materials of Ministry of Education, Department of Materials Science and Engineering, Jilin University, Changchun 130025, China;
2.
b State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
3.
c Changzhou Institute of Energy Storage Materials & Devices, Changzhou 213022

Corresponding author: CUI Dongmei,
Received Date: 27 September 2012
Available Online: 18 October 2012

Treatment of scandium tris(alkyl)s,Sc(CH₂SiMe₃)₃(THF)₂,with 2-Me-C₆H₄NHPPh₂=NC₆H₂-2,4,6-Me₃(NPN^ArH) via deprotonation affords the bis(alkyl) derivative [NPN^Ar]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(M_w/M_n) is 1.65 at-75℃.
- butadiene,
- selectivity,
- catalytic activity
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