Macrocyclic and macroacyclic compartmental Schiff bases: synthesis, characterization, X-ray structure and interaction with metal ions
作者:A. Aguiari、E. Bullita、U. Casellato、P. Guerriero、S. Tamburini、P.A. Vigato
DOI:10.1016/s0020-1693(00)86831-0
日期:1992.12
electron impact (EI) or fast atom bombardment (FAB) mass spectrometry. The X-ray crystal structures of H4LC and H2LF have also been solved. Crystals of H4LC, grown from CHCl3, are monoclinic, space group P21/c with a=6.767(4), b=14.106(5), c=18.163(5) A, β=91.05(4)° for Z=4. The molecule is composed of two identical dihydroxybenzaldimine moieties connected by the carbon atom C(9). Three hydroxylic oxygens
通过在甲醇中将2,3-二羟基苯甲醛与1,2-二氨基乙烷,1,2-二氨基-2-甲基丙烷,1,3反应制得无环,潜在的六齿(H4LAH4LD)或nt齿(H6LE)隔室席夫碱-二氨基-2,2-二甲基丙烷,1,2-二氨基苯或三(2-氨基乙基)胺以2:1或3:1的分子比为宜。2,6-二甲酰基-4-Z-苯酚(ZCl-,CH3-)与1,2-二氨基苯在甲醇中的反应产生了部分还原的大环(H2LF和H2LG)。类似的对称四亚胺大环配体是通过相同的2,6-二甲酰基-4-取代的酚与1,5-二氨基-3-氮杂戊烷(H2LH)或1,4-双(3-氨基丙基)哌嗪的环缩合合成的(H2LI)。已采用逐步过程来制备不对称大环化合物(H2LL)。配体为黄色或橙黄色固体,并已通过元素分析,IR,1H NMR光谱和电子轰击(EI)或快速原子轰击(FAB)质谱表征。H4LC和H2LF的X射线晶体结构也已解决。由CHCl3生成的H4LC晶体为单斜晶,空间群P21