Dicopper(II) Metallacyclophanes with Electroswitchable Polymethyl-Substituted<i>para</i>-Phenylene Spacers
作者:Jesús Ferrando-Soria、María Castellano、Rafael Ruiz-García、Joan Cano、Miguel Julve、Francesc Lloret、Catalina Ruiz-Pérez、Jorge Pasán、Laura Cañadillas-Delgado、Donatella Armentano、Yves Journaux、Emilio Pardo
DOI:10.1002/chem.201204484
日期:2013.9.2
Double‐stranded anionic dinuclear copper(II) metallacyclic complexes of the paracyclophane type [Cu2L2]4− have been prepared by the CuII‐mediated self‐assembly of different para‐phenylenebis(oxamato) bridging ligands with either zero‐, one‐, or four‐electron‐donating methyl substituents (L=N,N′‐para‐phenylenebis(oxamate) (ppba; 1), 2‐methyl‐ N,N′‐para‐phenylenebis(oxamate) (Meppba; 2), and 2,3,5,6‐tetramethyl‐
对环烷型[Cu 2 L 2 ] 4−的双链阴离子双核铜(II)金属环配合物是通过Cu II介导的不同对苯撑双(oxamato)桥联配体与Cu介导的自组装而制备的,该配体具有零,一维,或四供电子甲基取代基的(L = ñ,ñ ' -对-phenylenebis(草氨酸乙酯)(PPBA; 1),2-甲基ñ,ñ ' -对-phenylenebis(草氨酸乙酯)(Meppba; 2),和2,3,5,6-四甲基- ñ,ñ ' -对位-亚苯基二(草酸酯)(Me 4 ppba; 3))。这些配合物已被分离为四正丁基铵(1 a - 3 a),锂(I)(1 b - 3 b)和四苯基phosph盐(1 c - 3 c)。1 a和3 c的X射线晶体结构显示出平行位移的π堆积构象,当增加甲基取代基的数量时,与两个苯环和正方形平面Cu II离子的基面之间的垂直性的偏差较小。(平均二面角(ϕ分别为1a和3c的58.72(7)和73