Binuclear and polynuclear transition metal complexes with macrocyclic ligands. 4. New polydentate azomethine ligands based on 2,5-diformylpyrrole and 2,6-diformylpyridine
作者:E. A. Katayev、M. D. Reshetova、Yu. A. Ustynyuk
DOI:10.1023/b:rucb.0000030807.35988.a5
日期:2004.2
with propane-1,3-diamine afforded new macrocyclic Schiff"s bases 5 and 6, respectively. Their structures were established by NMR spectroscopy and mass spectrometry. Binuclear copper(ii) and nickel(ii) complexes with ligand5 were synthesized. Pentadentate Schiff"s base, viz., 2,6-bis[(2-aminophenylimino)methyl]pyridine, was prepared by demetallation of its complex with Cd(ClO4)2 using Na2S. In solutions
2,5-二甲酰基吡咯 (1) 和 2,6-二甲酰基吡啶 (2) 与丙烷-1,3-二胺反应分别生成了新的大环席夫碱 5 和 6。它们的结构通过核磁共振谱和质谱确定光谱法。合成了具有配体 5 的双核铜 (ii) 和镍 (ii) 配合物。五齿席夫碱,即 2,6-双[(2-氨基苯基亚氨基)甲基]吡啶,通过其配合物的脱金属作用制备Cd(ClO4)2 使用 Na2S。在溶液中,后者的席夫碱在大气氧或其他温和氧化剂的作用下定量转化为2,6-双(苯并咪唑基)吡啶。