Preorganized Anion Traps for Exploiting Anion-π Interactions: An Experimental and Computational Study
作者:Anne Bretschneider、Diego M. Andrada、Sebastian Dechert、Steffen Meyer、Ricardo A. Mata、Franc Meyer
DOI:10.1002/chem.201302598
日期:2013.12.9
1,3‐Bis(pentafluorophenyl‐imino)isoindoline (AF) and 3,6‐di‐tert‐butyl‐1,8‐bis(pentafluorophenyl)‐9H‐carbazole (BF) have been designed as preorganized anion receptors that exploit anion–π interactions, and their ability to bind chloride and bromide in various solvents has been evaluated. Both receptors AF and BF are neutral but provide a central NH hydrogen bond that directs the halide anion into a
1,3-双(五氟苯基-亚氨基)异吲哚啉(A F)和3,6-二叔丁基-1,8-双(五氟苯基)-9 H-咔唑(B F)被设计为预组织阴离子受体利用阴离子-π相互作用及其在各种溶剂中结合氯离子和溴离子的能力进行了评估。受体A F和B F均为中性,但提供中心的NH氢键,将卤化物阴离子引导至两个缺电子的附加芳烃的预组织钳位中。的主-客体复合物的晶体结构˚F用DMSO,氯-或Br -(A ˚F:DMSO,A ˚F值:Cl- ,并能:Br - )显示,在所有情况下,酒店坐落于全氟襟翼之间的间隙,但NMR光谱中显示,由于解决方案比较复杂的情况ē,ž / ž,ž主机的异构。在更加刚性的受体B的情况下˚F,工作曲线证据1:1层的复合物的形成有Cl -和Br - ,和结合常数高达960 中号-1都取决于溶剂被确定。B F和B F的晶体结构:DMSO可视化阴离子与π相互作用的主体的独特预组织。参考化合物1,3-双(2-嘧啶基亚氨基)异吲哚啉(A