| Popis: |
Two unsymmetrical tetradentate aza-macrocycles with side arms attached to the Nsp3 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] · (Cd-Cl2)2 was elucidated by X-ray crystallography and was solved by the heavy-atom method to a final R value of 0.029 for 3084 reflections with |F| > 3σ (I). In the exo-structure of the dinuclear complex each cadmium atom is five-coordinated, bonding to three N atoms and two chlorine atoms. |
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