A new bis(phenol-armed) pyridazine-containing Schiff base ligand: synthesis, complexation and reduction to the amine ligand analogue
作者:Sally Brooker、Simon S Iremonger、Paul G Plieger
DOI:10.1016/s0277-5387(02)01398-0
日期:2003.3
structurally characterised and is shown to be close to planar (maximum twist of pyridazine ring vs. phenyl ring planes is just 17.7°) with both intramolecular and intermolecular hydrogen-bonding interactions present. The latter hydrogen-bonding interactions in combination with offset parallel π–π stacking interactions are instrumental in the formation of columns of a stepped criss-cross type array. The ligand
摘要从3,6-二甲酰基哒嗪和2当量的邻氨基苯酚合成了双酚基无环席夫碱配体H2L。H2L配体在结构上已得到表征,显示接近平面(哒嗪环相对于苯环平面的最大扭曲仅为17.7°),同时存在分子内和分子间氢键相互作用。后者的氢键相互作用与偏置的平行π-π堆积相互作用相结合,对形成阶梯式交叉交叉型阵列的柱子非常有用。该配体在二甲基甲酰胺中于Epa = + 0.91 V相对于0.01 mol -1 AgNO3 / Ag经历不可逆氧化,形成一种不稳定的新化合物,该化合物在E1 /2≈-0.77V时表现出紧密间隔的拟可逆过程另外,在-0处有一个过程。25 V,这与Epc = -1.52 V时的不可逆还原过程有关。H2L的两个亚胺键的化学还原是通过与NaBH4反应实现的,得到的二胺类似物H6L'为二盐酸盐:没有哒嗪环还原的迹象被观测到。已经制备并部分表征了L2-,Co2L(CH3COO)2,Ni2L(CH3C