许多环戊二烯基钛的芳氧化物配合物1-Ar-2,3,4,5-Me 4 -Cp(2,6- i Pr 2 C 6 H 3 O)TiCl 2(氩气 = 4-Me 3硅苯基(5),4- i苯基(6),4-甲基(7),3,5-(CF 3)2苯基(8))和(1-Ar-2,3,4,5-Me 4 CpTiCl 2)2(OAr'O) (氩气= 4,4'-(3,3',5,5'- i Pr 4 C 6 H 2 –C 6 H 2),氩气 = 4-SiMe 3苯基(9),4-甲基(10))由相应的反应合成环戊二烯基三氯化钛 与相关锂盐的衍生物 苯酚。配合物的分子结构6,7和8分别通过X射线晶体学确定。激活时我卜3的Al和Ph 3 CB(C 6 F 5)4,所有单核配合物5-8都表现出良好的催化活性丙烯然而,在相同的聚合条件下,双核络合物9和10显示出较低的催化活性。13 C NMR,DSC和GPC分析表明,所产生的聚
Correlating Reactivity and Selectivity to Cyclopentadienyl Ligand Properties in Rh(III)-Catalyzed C–H Activation Reactions: An Experimental and Computational Study
作者:Tiffany Piou、Fedor Romanov-Michailidis、Maria Romanova-Michaelides、Kelvin E. Jackson、Natthawat Semakul、Trevor D. Taggart、Brian S. Newell、Christopher D. Rithner、Robert S. Paton、Tomislav Rovis
DOI:10.1021/jacs.6b11670
日期:2017.1.25
CpXRh(III)-catalyzed C-H functionalization reactions are a proven method for the efficient assembly of small molecules. However, rationalization of the effects of cyclopentadienyl (CpX) ligand structure on reaction rate and selectivity has been viewed as a black box, and a truly systematic study is lacking. Consequently, predicting the outcomes of these reactions is challenging because subtle variations
Synthesis and biological evaluation of zwitterionic half-sandwich Rhodium(III) and Ruthenium(II) organometallic complexes
作者:Lihua Guo、Xueyan Hu、Yanjing Yang、Wenyu An、Jie Gao、Qin Liu、Zhe Liu
DOI:10.1016/j.bioorg.2021.105311
日期:2021.11
Herein we present the synthesis and characterization of a panel of structurally related zwitterionic piano-stool rhodium(III) and ruthenium(II) complexes. The identities of these novel complexes have been determined by NMR spectroscopy, mass spectrometry, elemental analysis and single-crystal X-ray crystallography. The stability and fluorescence property of these zwitterionic complexes were also confirmed
在此,我们展示了一组结构相关的两性离子钢琴凳铑(III)和钌(II)配合物的合成和表征。这些新型配合物的特性已通过核磁共振光谱、质谱、元素分析和单晶 X 射线晶体学确定。这些两性离子复合物的稳定性和荧光特性也得到了证实。两性离子铑 (III) 复合物Rh1 - Rh4对 A549 和 HeLa 人类癌细胞显示出有效的细胞毒活性。相反,两性离子钌(II)配合Ru1 - Ru4对测试细胞系没有表现出明显的细胞毒活性。此外,观察到分别在η 5 -Cp R环和 N, N -螯合配体中引入氟化取代基和苯环可以增强这些两性离子铑 (III) 配合物的细胞毒性的趋势。使用流式细胞术的机制探索表明,这些铑(III)配合物的细胞毒性与细胞周期的扰动和细胞凋亡的诱导有关。此外,使用共聚焦显微镜的显微分析表明,代表性的铑 (III) 配合物Rh4 通过能量依赖途径进入 A549 细胞并主要在溶酶体中积累,从而导致溶酶体完整性的破坏。
Propylene polymerization to high molecular weight atactic polypropylene and copolymerization with 1-hexene using monocyclopentadienyl titanium catalysts
作者:Qiaolin Wu、Qing Su、Ling Ye、Guanghua Li、Ying Mu
DOI:10.1039/b921617k
日期:——
corresponding cyclopentadienyl titanium trichloridederivative with the lithium salt of a relevant phenol. The molecular structures of complexes 6, 7 and 8 were determined by X-ray crystallography. Upon activation with iBu3Al and Ph3CB(C6F5)4, all mononuclear complexes 5–8 exhibit good catalytic activities for propylene polymerization, whereas the binuclear complexes 9 and 10 show lower catalytic activities
许多环戊二烯基钛的芳氧化物配合物1-Ar-2,3,4,5-Me 4 -Cp(2,6- i Pr 2 C 6 H 3 O)TiCl 2(氩气 = 4-Me 3硅苯基(5),4- i苯基(6),4-甲基(7),3,5-(CF 3)2苯基(8))和(1-Ar-2,3,4,5-Me 4 CpTiCl 2)2(OAr'O) (氩气= 4,4'-(3,3',5,5'- i Pr 4 C 6 H 2 –C 6 H 2),氩气 = 4-SiMe 3苯基(9),4-甲基(10))由相应的反应合成环戊二烯基三氯化钛 与相关锂盐的衍生物 苯酚。配合物的分子结构6,7和8分别通过X射线晶体学确定。激活时我卜3的Al和Ph 3 CB(C 6 F 5)4,所有单核配合物5-8都表现出良好的催化活性丙烯然而,在相同的聚合条件下,双核络合物9和10显示出较低的催化活性。13 C NMR,DSC和GPC分析表明,所产生的聚
The Fluorine Effect in Zwitterionic Half-Sandwich Iridium(III) Anticancer Complexes
作者:Yanjing Yang、Lihua Guo、Xingxing Ge、Teng Zhu、Wenjing Chen、Huanxing Zhou、Liping Zhao、Zhe Liu
DOI:10.1021/acs.inorgchem.9b03006
日期:2020.1.6
fluorescence emission, and show potent catalytic activity in converting NADH to NAD+. The effect of the substituents in the η5-CpR ring for these zwitterionic complexes on their anticanceractivity was systematically investigated. Surprisingly, the presence of fluorinated substituents gives rise to a significant increase in the anticanceractivity. The lipophilicity and cellular uptake levels of these complexes