Zirconium complexes with pendant aryloxy groups attached to the metallocene moiety by ethyl or hexyl spacers
摘要:
Four zirconium complexes with pendant aryloxy groups attached to the metallocene moiety by ethyl or hexyl spacers have been synthesized and characterized by spectroscopic methods and HR-MS or elemental analysis. The solid state structure of bis[{6-(2,6-dimethylphenoxy)hexyl}cyclopentadienyl]zirconium dichloride was determined by single crystal X-ray diffraction. The prepared complexes were tested as catalyst precursors in the polymerization of ethylene upon activation with MAO. The results showed a marked effect of the spacer length on the catalytic activity, while only a minor effect of the substitution on the aryl group, which affected its steric properties. (C) 2013 Elsevier Ltd. All rights reserved.
Zirconium complexes with pendant aryloxy groups attached to the metallocene moiety by ethyl or hexyl spacers
摘要:
Four zirconium complexes with pendant aryloxy groups attached to the metallocene moiety by ethyl or hexyl spacers have been synthesized and characterized by spectroscopic methods and HR-MS or elemental analysis. The solid state structure of bis[{6-(2,6-dimethylphenoxy)hexyl}cyclopentadienyl]zirconium dichloride was determined by single crystal X-ray diffraction. The prepared complexes were tested as catalyst precursors in the polymerization of ethylene upon activation with MAO. The results showed a marked effect of the spacer length on the catalytic activity, while only a minor effect of the substitution on the aryl group, which affected its steric properties. (C) 2013 Elsevier Ltd. All rights reserved.
Method of treating lipidemia with aryloxyalkylaminobenzoic acids and
申请人:American Cyanamid Company
公开号:US04182776A1
公开(公告)日:1980-01-08
Aryloxyalkylaminobenzoic acids and esters as hypolipemic compounds.
芳氧烷基氨基苯甲酸和酯作为降脂化合物。
Nickel-Catalyzed Cyanation of Unactivated Alkyl Sulfonates with Zn(CN)<sub>2</sub>
作者:Aiyou Xia、Peizhuo Lv、Xin Xie、Yuanhong Liu
DOI:10.1021/acs.orglett.0c02722
日期:2020.10.16
Cyanation of unactivated primary and secondaryalkyl mesylates with Zn(CN)2 catalyzed by nickel has been developed. The reaction provides an efficient route for the synthesis of alkyl nitriles with wide substrate scope, good functional group tolerance, and compatibility with heterocyclic compounds. Mechanistic studies indicate that alkyliodide generated in situ serves as the reactive intermediate
Zirconium complexes with pendant aryloxy groups attached to the metallocene moiety by ethyl or hexyl spacers
作者:Won Seok Cho、So Han Kim、Da Jung Kim、Sang-deok Mun、Ran Kim、Min Jeong Go、Myung Hwan Park、Min Kim、Junseong Lee、Youngjo Kim
DOI:10.1016/j.poly.2013.08.066
日期:2014.1
Four zirconium complexes with pendant aryloxy groups attached to the metallocene moiety by ethyl or hexyl spacers have been synthesized and characterized by spectroscopic methods and HR-MS or elemental analysis. The solid state structure of bis[6-(2,6-dimethylphenoxy)hexyl}cyclopentadienyl]zirconium dichloride was determined by single crystal X-ray diffraction. The prepared complexes were tested as catalyst precursors in the polymerization of ethylene upon activation with MAO. The results showed a marked effect of the spacer length on the catalytic activity, while only a minor effect of the substitution on the aryl group, which affected its steric properties. (C) 2013 Elsevier Ltd. All rights reserved.