作者:Iva Honzíčková、Jan Honzíček、Jaromír Vinklárek、Zdeňka Padělková、Martina Řezáčová、Lucie Šebestová
DOI:10.1002/aoc.3117
日期:2014.4
metallocene structure with two cyclopentadienyl ligands and two chlorides coordinated to niobium in the oxidation state IV. Chlorides and the centroids of the η5‐bonded cyclopentadienyl rings define a distorted tetrahedron. The cytotoxicity study has demonstrated that substitution with methoxybenzyl groups can lead to highly active species, but the activity strongly varies with the number and positions
一系列新的环官能niobocene二氯化化合物(RCH 2 ç 5 ħ 4)2 NbCl 2(R = MeOCH 2,(CH 2)5 NCH 2,2-MeOC 6 H ^ 4,3-MeOC 6 H ^ 4,4 -MeOC 6 ħ 4,2,4-(MEO)2 C ^ 6 ħ 3,3,4-(MEO)2 C ^ 6 ħ 3,2,4,6-(MEO)3 c ^ 6 ħ 2,3,4- ,5‐(MeO)3c ^ 6 ħ 2,4-FC 6 H ^ 4,4-ME 2 NC 6 H ^ 4)的合成和表征通过电子顺磁共振。通过X射线衍射分析确定了三个结构,揭示了预期的弯曲茂金属结构,其中两个环戊二烯基配体和两个氯化物在氧化态IV下与铌配位。氯化物和η的质心5键合的环戊二烯基环定义为扭曲的四面体。细胞毒性研究表明,用甲氧基苄基取代可产生高活性物种,但活性随苯环中甲氧基的数量和位置而有很大变化。研究中最活跃的物质– 2