A process capable of producing an ethylene/α-olefin copolymer having a high molecular weight even under the conditions of a high polymerization temperature is provided. The process for producing an ethylene/α-olefin copolymer includes copolymerizing ethylene and an α-olefin having 3 or more carbon atoms in the presence of an olefin polymerization catalyst including a crosslinked metallocene compound (A) represented by the following general formula [I] and a cocatalyst component (B). In the general formula [I], Y is selected from a carbon atom, etc., M is a hafnium atom or the like, R1 to R12 are each selected from a hydrogen atom, a hydrocarbon group, etc., R13 and R14 are each a substituted aryl group or the like, at least one of R13 and R14 is a substituted aryl group having one or more electron-donating substituents having a Hammett substituent constant σ of not more than −0.2, Q is selected from a halogen atom, etc., and j is an integer of 1 to 4.
Übergangsmetall-fulven-komplexe XXXIII. Synthese und struktur von fulven-komplexen des cobalts und rhodiums
作者:Doris Rau、Ulrich Behrens
DOI:10.1016/0022-328x(90)80026-v
日期:1990.5
Diarylfulvenes react with (C5H5)Co(C2H4)2 to give the η4-coordinated fulvene complexes (C5H5)2Co(fulvene) (3). Reaction of (C5H5)Rh(C2H4)2 or (C9H7)Rh (C2H4)2 (C9H7 = indenyl) with diphenylfulvene yields the compounds (C5H5)Rh(η4-fulvene) (4) or (C9H7)Rh(η4-fulvene) (5), respectively. An X-ray diffraction study confirms an η5-coordination for the indenyl and η4-coordination for the fulvene ligand in
Diarylfulvenes与(C反应5 ħ 5)有限公司(C 2 H ^ 4)2,得到η 4配位的亚甲基环戊二烯配合物(C 5 H ^ 5)2的Co(富烯)(3)。(C 5 H 5)Rh(C 2 H 4)2或(C 9 H 7)Rh(C 2 H 4)2(C 9 H 7 =茚基)与二苯基富勒烯的反应产生化合物(C 5 H 5)的Rh(η 4 -fulvene)(4)或(C 9 H ^ 7)的Rhη(4 -fulvene)(5)表示。的X射线衍射研究证实一个η 5的茚基和η-coordination 4 -coordination用于类型的复合物中的富烯配体5。为了比较,还确定了双(二甲基氨基苯基)富烯的结构。
Broad Scope [4 + 2] Cycloaddition of <i>o</i>-Carboryne with Pentafulvenes Using 1-Li-2-OTf-<i>o</i>-C<sub>2</sub>B<sub>10</sub>H<sub>10</sub> as Precursor
作者:Jie Zhang、Zaozao Qiu、Zuowei Xie
DOI:10.1021/acs.organomet.7b00574
日期:2017.10.9
from 1-Li-2-OTf-o-C2B10H10 undergoes an efficient [4 + 2] cycloaddition with pentafulvenes at room temperature to give a series of carboranonorbornenes in good to high isolated yields. This reaction is compatible with many functional groups and has a very broad substrate scope from 6-mono- to 6,6′-disubstituted pentafulvenes and from alkyl to aryl substituents. Further transformations of the resultant
从1-Li-2-OTf- o -C 2 B 10 H 10原位生成的邻-碳硼烷(1,2-脱氢-邻-甲硼烷)在室温下进行有效的[4 + 2]环戊五烯加成反应,得到一系列高或高分离产率的碳硼烷降冰片烯。该反应与许多官能团相容,并且具有非常宽的底物范围,从6-单-至6,6'-二取代的五氟戊烯和从烷基至芳基取代基。已经对所得的[4 + 2]环加成产物进行了进一步的转化,从而提供了各种多功能的邻氨基甲酸酯。
An improved pathway to 6,6-disubstituted fulvenes
作者:Khalil Chajara、Henrik Ottosson
DOI:10.1016/j.tetlet.2004.07.058
日期:2004.8
Pentafulvenes with alkyl and/or aryl substituents at the exocyclic position are formed rapidly in high yields through reaction of crystalline sodium cyclopentadienide directly with the appropriate ketones.