Pendant-armed Unsymmetrical Aza-macrocycles: Syntheses,Coordination Behavior and Crystal Structure of a Dinuclear Cadmium Complex

• 来源期刊: 中国化学（英文版）
• 年，卷（期）: 2002,（9）
• 页码范围: 865-871
• 页数: 7页
• 语种: 英文

摘要

Two nsymmetrical tetradentate aza-macrocycles with side arms attached to the N3sp atoms, L1 and L2, as well as their complexes with different metal cations were synthesized and characterized by EA, UV, IR, 1H NMR and MS spectra. Both the two ligands can efficiently transport alkali and transition metal cations across an organic membrane with high selectivity ratio. The structure of a dinuclear Cd(Ⅱ)complex [L1@(CdCl2)2] was elucdated by X-ray crystallography and was solved by the heavy-atom method to afinal R value of 0.029 for 3084reflections with |F| ＞3σ(I). In the exo-structore of the dinuclear complex each cadmium atom is five-coordinated, bonding to three N atoms and two chlorine atoms.