Abstract
A new triazamacrocycle, 1,6,11-triazacyclopentadecane (tacpd), has been synthesized and its complexation behaviors toward nickel(II), copper(II) and zinc(II) ions have been examined. tacpd formed a Zn(II) complex of the composition Zn 3(tacpd) 2Cl 6 but no discrete complexes with Ni(II) and Cu(II) ions. The 1H and 13C NMR spectra indicated that the zinc complex is stable in N,N-dimethylformamide and formulated as [Zn(tacpd)Cl] 2[ZnCl 4] in which [Zn(tacpd)Cl] + assumes a tetrahedral structure formed by the chloride ion and three nitrogens of tacpd.
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