作者:Rui F. Munhá、Ryan A. Zarkesh、Alan F. Heyduk
DOI:10.1021/ic401496w
日期:2013.10.7
were used to characterize and compare complexes with different redox-active ligand derivatives in each oxidation state. This study demonstrates that while the ligand redox potentials can be adjusted over a 270 mV range through substitutions at the 4/4′ ring positions, the coordination chemistry and reactivity patterns at the bound tantalum center remain unchanged, suggesting that such ligand modifications
制备了一系列钽化合物,以探测通过将供电子基团或吸电子基团添加到衍生自双(2-异丙基氨基-4-X-苯基)胺[ X,iPr(NNN cat)H 3,X = F,H,Me,t Bu])。X,iPr(NNN cat)H 3配体家族的一般合成方法是从4/4'二取代的二苯胺衍生物开始的。通过钯催化的交叉偶联实现了第二个配体修饰,即在侧面的氮部分上引入了芳族取代基,从而获得了双(2-3,5-二甲基苯基氨基-4-甲氧基-苯基)胺OMe,DMP(NNN cat)H 3(DMP = 3,5-C 6 H 3 Me 2),可以对空间位阻较小的异丙基衍生物进行比较研究。用1当量的TaMe 3 Cl 2处理三胺产生了高产率的相应二氯配合物X,R(NNN cat)TaCl 2(L)(L =空或Et 2 O)。这些中性二氯化物衍生物与[NBnEt 3 ] [Cl]反应生成阴离子三氯化物衍生物[NBnEt 3 ] [ X,R(NNN