A process for preparing bis-cyclopentadienyl compounds bridged by a methylene group is reported, said process comprising reacting formaldehyde with a cyclopentadienyl compound in the presence of a base and of a solvent having a dielectric constant (.epsilon.), measured at 25.degree. C., higher than 7. The bridged compounds, obtainable in high yields with this simple single-step process, can be used to prepare ansa-metallocenes, active as catalyst components in the polymerization of olefins.
申请人:DL Chemical CO., LTD. 디엘케미칼 주식회사(120210166754) Corp. No ▼ 110111-7736858BRN ▼898-86-01996
公开号:KR20210068218A
公开(公告)日:2021-06-09
윤활유용 기유로서 사용할 수 있는, 낮은 점도의 알파-올레핀 올리고머 및 이의 제조방법이 개시된다. 명세서에 기재된 화학식 1로 표시되는 화합물, 화학식 2로 표시되는 화합물 및 화학식 3으로 표시되는 화합물로 이루어진 군으로부터 선택되는 하나 이상의 안사-메탈로센 촉매를 포함하는 올레핀 중합 촉매 조성물의 존재 하에서, 탄소수 2 내지 20의 알파-올레핀 단량체를 중합하는 단계를 포함하는 알파 올레핀 올리고머의 제조방법을 포함한다.
Rhodium Complexes of Carbaporphyrins, Carbachlorins, <i>adj</i>-Dicarbaporphyrins, and an <i>adj</i>-Dicarbachlorin
作者:Timothy D. Lash、William T. Darrow、Alissa N. Latham、Navneet Sahota、Gregory M. Ferrence
DOI:10.1021/acs.inorgchem.9b00721
日期:2019.6.3
good-to-excellent yields of rhodium(I) complexes, and these were fully characterized by X-ray crystallography. Both rhodium(I) derivatives were converted into rhodium(III) complexes in refluxing pyridine, albeit in moderate yields. Carbachlorins also formed rhodium(I) complexes, but these could not be further transformed into rhodium(III) products. The rhodium(III) complexes incorporate two axial pyridine
碳卟啉中的大环腔非常适合形成金属化衍生物。碳卟啉二酯和萘甲碳卟啉与[Rh(CO)2 Cl] 2反应,得到良好至极佳产率的铑(I)配合物,并通过X射线晶体学对其进行了充分表征。两种铑(I)衍生物均在回流吡啶中转化为铑(III)配合物,尽管收率中等。氨基甲酸酯还形成铑(I)配合物,但不能进一步转化为铑(III)产物。铑(III)配合物包含两个轴向吡啶配体,它们在其1中显示出强烈的屏蔽共振。1 H NMR谱和铑(III)碳卟啉二酯通过X射线晶体学进一步表征。adj- Dicarbaporphyrins也形成铑(I)配合物,但这些反应涉及质子的重定位以生成内部亚甲基单元。与生成的宏周期的两个面相关的环境彼此非常不同,因此结果为1两个内部亚甲基质子的H NMR化学位移相距3 ppm以上。虽然铑(Ⅰ)配合物对单碳卟啉和氨基甲绿素的亲核性与母体配体相当,但铑(Ⅰ)二碳配合物的化学位移与卟啉类芳香性的显着
The synthesis and reactivity of some indenyl and bis-indenyl ruthenium carbonyl complexes
作者:Venugopal Shanmugham Sridevi、Weng Kee Leong
DOI:10.1016/j.jorganchem.2007.07.023
日期:2007.10
with 2-phenylindene affords the expected dinuclear complex [(η5-C9H6Ph)Ru(CO)2}2] (5), and a heptaruthenium cluster [(C9H4Ph)Ru7(μ-H)(μ-CO)2(CO)16] (6). The indenyl ligand in compound 6 exhibits a novel bonding mode in which the benzenoid ring is μ4,η1:η1:η2:η2 bound to the cluster. Refluxing 1 with bis-indenyl methane affords the dinuclear complex [Ru2(CO)4μ-(η5-C9H6)2CH2}] (7), which reacts with
[EN] PROCESS FOR THE PREPARATION OF CYCLOPENTADIENIDE-BASED ANSA LIGANDS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE LIGANDS ANSA À BASE DE CYCLOPENTADIÉNIDE
申请人:CAMBRIDGE ENTPR LTD
公开号:WO2021176213A1
公开(公告)日:2021-09-10
A method for preparing a compound comprising a cyclopentadienyl moiety is described. The method comprises: (a) deprotonating a cyclopentadienyl moiety in a solution comprising an alkali hydroxide and a reducing agent; and (b) reacting the deprotonated cyclopentadienyl moiety with a compound having an electrophilic site. Also described is a method of separating a rac-ansa-bridged bis-indenyl transition metal compound of formula (rac-M1) from its meso isomer.