Nickel(II) and palladium(II) complexes with singly condensed diprimary triamines and 2-aminobenzaldehyde
作者:Edmund Kwiatkowski、Grzegorz Romanowski、Kinga Suwińska
DOI:10.1016/s0277-5387(02)01174-9
日期:2002.9
azaheptane, respectively. NiAX (X=Cl, NO3, ClO4), NiBI, and Ni(HD)X2 (X=Cl, NO3) display an alternation of configuration at the metal center from planar, over pseudohedral to octahedral when going from A, through B, to D containing complexes, as indicated by the variation in their spectroscopic and magnetic properties. NiAX complexes retain their planar structure in solution, whereas NiBI solutions
摘要通过2-氨基苯甲醛与1,5-二氨基-3-氮杂戊烷1:1的缩合反应制得的不对称席夫碱HA,HD和HB络合得到六种新的镍(II)和一种钯(II)配合物。 7-二氨基-4-氮杂庚烷和1,7-二氨基-4-甲基-4-氮杂庚烷。NiAX(X = Cl,NO3,ClO4),NiBI和Ni(HD)X2(X = Cl,NO3)在从A到B的金属中心从平面,伪面到八面体显示出构型交替,含D的配合物,如其光谱和磁性的变化所指示。NiAX配合物在溶液中保留其平面结构,而NiBI溶液显示弱顺磁性,这是由于低自旋(S = 0)平面和高自旋(S = 1)接近四面体之间快速(在NMR时间尺度上)平衡的结果形式。通过X射线衍射研究获得的NiAClO4和NiBI的晶体结构揭示了前者的平面配位以及N1,Ni,N2和N3,Ni,N4平面之间的夹角为41°的平面到四面体扭曲的金属构型后一种化合物。分子间的电荷转移跃迁解释了固体NiAClO4在600-800