Half-sandwich rhodium and iridium metallamacrocycles constructed via C–H activation
作者:Lin Lin、Ying-Ying Zhang、Yue-Jian Lin、Guo-Xin Jin
DOI:10.1039/c5dt04777c
日期:——
Half-sandwich rhodium and iridium complexes with carboxylic acid ligands were combined with pyrazine, 4,4′-bipyridine (bpy) or trans-1,2-bis(4-pyridyl)-ethylene (bpe) to give a series of tetranuclear macrocycles. The metallamacrocycles [(Cp*Rh)4(L1)2(pyrazine)2][OTf]2 (1), [(Cp*Rh)4(L1)2(bpy)2][OTf]2 (2), [(Cp*Rh)4(L1)2(bpe)2][OTf]4 (3) and [(Cp*Ir)4(L2)2 (pyrazine)2] (4) (L1 = 3-(2-pyridyl)acrylic
将具有羧酸配体的半三明治铑和铱配合物与吡嗪,4,4'-联吡啶(bpy)或反-1,2-双(4-吡啶基)-乙烯(bpe)结合,得到一系列四核大环化合物。金属lamcrocrocycles [(Cp * Rh)4(L 1)2(吡嗪)2 ] [OTf] 2(1),[(Cp * Rh)4(L 1)2(bpy)2 ] [OTf] 2(2),[(Cp * Rh)4(L 1)2(bpe)2 ] [OTf] 4(3)和[(Cp * Ir)4(L 2)2(吡嗪)2 ](4)(L 1 = 3-(2-吡啶基)丙烯酸,L 2 = 1,4-二(4-羧苯基)苯)通过元素分析,NMR,IR和单晶X射线分析进行表征。由于羧酸盐配体的结构不同,配合物1a–3a,1b–3b和4通过双位C–H活化合成,而配合物1c–3c通过一键C–H活化获得。