Pentamethylcyclopentadienyl Titanium(IV) Amido Pyridylene Phenylene and Pentamethylcyclopentadienyl Titanacyclopropane Amido Complexes and their Behavior in the Polymerization of Ethylene and Cyclic Olefins

Pentamethylcyclopentadienyl Titanium(IV) Amido Pyridylene Phenylene and Pentamethylcyclopentadienyl Titanacyclopropane Amido Complexes and their Behavior in the Polymerization of Ethylene and Cyclic Olefins
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五甲基环戊二烯基钛(IV)氨基吡啶亚苯基和五甲基环戊二烯基钛环丙烷氨基配合物及其在乙烯和环烯烃聚合中的行为

DOI:
10.1002/cctc.201601495
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发表时间:
--
期刊:
影响因子:
4.5
通讯作者:
Buchmeiser
Buchmeiser
中科院分区:
化学3区
文献类型:
--
作者:
van der Ende;Buchmeiser

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五甲基环戊二烯基钛(Cp* TiCl 3)与N,N-双{6-[2-(二乙基硼基)苯基]吡啶-2-基}酰胺锂反应,生成氯代[η3-N-{6-[2-(二乙基硼基)苯基]吡啶-2-基}-N-(6-C6 H 4)吡啶-2-基)酰胺基]五甲基环戊二烯基钛(Ti-1)。利用单晶XRD确定了Ti-1的结构。在Cp* TiCl 3与N-{6-[2-(二乙基硼基)苯基]吡啶基-2-基}-N '-[6-(2-溴苯基)吡啶基-2-基]酰胺锂反应时形成相同的化合物。N,N-双[6-(2-溴苯-1-基)吡啶-2-基]胺(4)与六甲基二硅基氨基锂反应,然后加入Cp* TiCl 3,形成[N,N-双{6-(2-溴苯-1-基)吡啶-2-基}酰胺]二氯五甲基环戊二烯基钛(Ti-2)。Ti-1与苄基氯化镁反应,通过C-H活化生成五甲基环钛乙烯基络合物五甲基环{N-(6-苯基吡啶-2-基)-N-[6-(2-乙基-η2-乙烯基硼基-C6 H4)吡啶-2-基]氨基}钛(Ti-3);Ti-3最好描述为单取代的钛环丙烷。在用甲基铝氧烷(MAO)活化后,Ti-1产生分子量>6× 106 g mol−1的线性高密度聚乙烯,而Ti-2产生乙基支化聚乙烯。Ti-1和Ti-2均能使乙烯(E)与降冰片烯(NBE)、乙烯(E)与环戊烯(CPE)共聚,以及乙烯(E)与NBE和CPE共聚。经MAO活化的Ti-1在NBE的开环易位聚合中也具有活性,生成高达97%的顺式间同立构聚(NBE)。所有所得均聚物和共聚物的聚合物结构通过使用13 C NMR光谱进行了阐明。 
The reaction of pentamethylcyclopentadienyl titanium trichloride (Cp*TiCl3) with lithiumN,N‐bis{6‐[2‐(diethylboryl)phenyl]pyridyl‐2‐yl}amide resulted in the formation of chlorido[η3‐N‐{6‐[2‐(diethylboryl)phenyl]pyridyl‐2‐yl}‐N‐(6‐C6H4)pyrid‐2‐yl)amido]pentamethylcyclopentadienyltitanium (Ti‐1). The structure ofTi‐1was elucidated by using single‐crystal XRD. The same compound is formed upon the reaction of Cp*TiCl3with lithiumN‐{6‐[2‐(diethylboryl)phenyl]pyridyl‐2‐yl}‐N’‐[6‐(2‐bromophenyl)pyridyl‐2‐yl]amide. The reaction ofN,N‐bis[6‐(2‐bromophen‐1‐yl)pyrid‐2‐yl]amine (4) with lithium hexamethyldisilazide followed by the addition of Cp*TiCl3leads to the formation of [N,N‐bis{6‐(2‐bromophen‐1‐yl)pyrid‐2‐yl}amide]dichloridopentamethylcyclopentadienyltitanium (Ti‐2). The reaction ofTi‐1with benzylmagnesium chloride yields the pentamethylcyclopentadienyl titanium vinyl complex pentamethylcyclopentadienyl{N‐(6‐phenylpyridyl‐2‐yl)‐N‐[6‐(2‐ethyl‐η2‐vinylboryl‐C6H4)pyrid‐2‐yl]amido}titanium (Ti‐3) by C−H activation;Ti‐3is best described as a monosubstituted titanacyclopropane. Upon activation with methylaluminoxane (MAO),Ti‐1produces linear, high‐density polyethylene with molecular weights >6×106g mol−1, whereasTi‐2yielded ethyl‐branched polyethylene. BothTi‐1andTi‐2are able to copolymerize ethylene (E) with norborn‐2‐ene (NBE) and E with cyclopentene (CPE) and to terpolymerize E with NBE and CPE.Ti‐1activated by MAO is also active in the ring‐opening metathesis polymerization of NBE to produce up to 97 %cis‐syndiotactic poly(NBE). The polymer structure of all resulting homo‐ and copolymers was elucidated by using13C NMR spectroscopy.
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发表时间: 2013-08-27
期刊: MACROMOLECULES
影响因子: 5.5
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DOI: --
发表时间: 1995
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