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

✍ Scribed by Jing-Chao Tao; Xin-Cheng Liao; Xing-Wang Wang; Chen-Xia Du

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
533 KB
Volume
20
Category
Article
ISSN
0256-7660

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✦ Synopsis

Abstract

Two unsymmetrical tetradentate aza‐macrocycles with side arms attached to the N~sp~^3^ atoms, L^1^ and L^2^, as well as their complexes with different metal cations were synthesized and characterized by EA, UV, IR, ^1^H 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 [L^1^] · (Cd‐Cl~2~)~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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