5-dimethoxybenzyl)benzimidazol-2-yl]-4′-X-phenyl)-pyridine (X = H: L3; X = NO2: L4; X = NEt2: L5) have been synthesized in six steps using Kröhnke reactions. Spectroscopic results show that the electronic properties of the ligands are strongly influenced by the nature of the substituent bound to the pyridine ring and extended Hückel calculations performed on 4-(X-phenyl)pyridine fragments give a qualitative
对位取代的三齿
配体2,6-双[1-(3,5-二甲氧基苄基)
苯并咪唑-2-基] -4'-X-苯基)-
吡啶(X = H:L 3 ; X = NO 2: L 4; X = NEt 2:L 5)已使用Kröhnke反应分六步合成。光谱结果表明,
配体的电子性质受到与
吡啶环结合的取代基的性质的强烈影响,对4-(X-苯基)
吡啶片段进行的扩展Hückel计算可对引起撞击的因素进行定性分析吸收光谱中观察到的差异。与Fe II络合后,
配体L 2 –L5得到在
乙腈溶液中呈彩色的伪六面体低自旋[Fe(L n)2 ] 2+(n = 2–5)配合物。电
化学和光谱测量表明,与每个取代基相关的特定电子特性都强烈影响所得Fe II配合物的性能,绿色配合物[Fe]中观察到的非常强烈的MLCT跃迁(ϵ> 50000 M -1 cm -1)证明了这一点。(L 5)2 ] 2+。