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亚胺膦亚胺型稀土双烷基配合物对丁二烯1,2-选择性聚合(英文)

Highly 1,2-Selective Polymerization of 1,3-Butadiene with Rare-earth Metal Bis(alkyl) s Bearing an Iminophosphonamide Ligand
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摘要 以三烷基钪Sc(CH2SiMe3)3(THF)2和胺基膦亚胺配体为原料,经烷基消去反应合成了亚胺膦亚胺(NPN)型配体螯合钪烷基配合物。其结构用1H NMR、13C NMR、元素分析和X射线衍射分析进行了表征。在助催化剂有机硼盐和烷基铝的作用下,该配合物对丁二烯聚合表现出了较高的催化活性。并且随着聚合温度的降低,催化剂的1,2-选择性也随之升高。聚合温度为-75℃时,产物的1,2-结构含量高达98.0%,聚合物的分子量为2.95×104,分子量分布为1.65。 Treatment of scandium tris(alkyl)s,Sc(CH2SiMe3)3(THF)2,with 2-Me-C6H4NHPPh2NC6H2-2,4,6-Me3(NPN^ArH) via deprotonation affords the bis(alkyl) derivativeSc(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 [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 ×10^4 and the molecular mass distribution(Mw/Mn) is 1.65 at-75 ℃.
出处 《应用化学》 CAS CSCD 北大核心 2012年第12期1394-1398,共5页 Chinese Journal of Applied Chemistry
关键词 丁二烯 选择性 催化活性 butadiene selectivity catalytic activity
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  • 1Wilson D J. Recent Advances in the Neodymium Catalysed Polymerisation of 1,3-Dienes[J].Makromolekulare Chemie-Macromolecular Symposia,1993,(01):273-288.
  • 2Shan C,Lin Y,Ouyang J. Single Crystal Structure of a Polymerization Active Nd-Al Bimetallic Complex[J].Makromolekulare Chemie,1987,(03):629-635.
  • 3Barbotin F,Spitz R,Boisson C. Heterogeneous Ziegler-Natta Catalyst Based on Neodymium for the Stereospecific Polymerization of Butadiene[J].Macromolecular Rapid Communications,2001,(17):1411-1414.
  • 4Thuilliez J,Monteil V,Spitz R. Alternating Copolymerization of Ethylene and Butadiene with a Neodymocene Catalyst[J].Angewandte Chemie International Edition,2005,(17):2593-2596.doi:10.1002/anie.200462019.
  • 5Evans W,Champagne T,Ziller J. Samarium versus Aluminium Lewis Acidity in a Mixed Alkyl Carboxylate Complex Related to Alkylaluminium Activation in Diene Polymerization Catalysis[J].Chemical Communications,2005,(47):5925-5927.doi:10.1039/b511714c.
  • 6Kaita S,Hou Z,Wakatsuki Y. Random-and Block-Copolymerization of 1,3-Butadiene with Styrene Based on the Stereospecific Living System:(C5 Me5) 2 Sm (μ-Me) 2 AlMe2/Al (i-Bu) 3/[Ph3 C][B (C6 F5) 4][J].Macromolecules,2001,(06):1539-1541.doi:10.1021/ma001609n.
  • 7Fischbach A,Klimpel M G,Widenmeyer M. Stereospecific Polymerization of Isoprene with Molecular and MCM-48-Grafted Lanthanide(Ⅲ) Tetraalkylaluminates[J].Angewandte Chemie International Edition,2004,(17):2234-2239.
  • 8Gao W,Cui D. Highly cis-1,4 Selective Polymerization of Dienes with Homogeneous Ziegler-Natta Catalysts Based on NCN-Pincer Rare Earth Metal Dichloride Precursors[J].Journal of the American Chemical Society,2008,(14):4984-4991.doi:10.1021/ja711146t.
  • 9Ajellal N,Furlan L,Thomas C. Mixed Aluminum-Magnesium-Rare Earth Allyl Catalysts for Controlled Isoprene Polymerization:Modulation of Stereocontrol[J].Macromolecular Rapid Communications,2006,(05):338-343.doi:10.1002/marc.200500775.
  • 10Bonnet F,Visseaux M,Pereira A. Stereospecific Polymerization of Isoprene with Nd (BH4) 3 (THF) 3/MgBu2 as Catalyst[J].Macromolecular Rapid Communications,2004,(08):873-877.doi:10.1002/marc.200300289.

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