Abstract
The infrared spectra, elemental and thermal (TG/DTG and DTA) analyses of novel [Zn(cyclen-κ 4N 1,4,7,10)(HGly-κ 2O,O′)](ClO 4) 2 ( 1), and [Zn 2(cyclen-κ 4N 1,4,7,10) 2(μ-S-Ala-κ 2N,O)](ClO 4) 3·2H 2O ( 2) complexes (cyclen – 1,4,7,10-tetraazacyclododecane) were recorded and analyzed in the relation to their structural peculiarities. IR spectral data indicate both mono- or bidentate coordination mode of a carboxylate group in the prepared complexes (at pH ≈ 9). The results indicate unusual bidentate carboxylate coordination mode (in complex ( 1)) toward to Zn 2+–cyclen unit. Therefore the crystal structure determination of the crystalline complex [Zn(cyclen-κ 4N 1,4,7,10)(NO 3-κ 2O,O′)](NO 3) was attached in order to support the coordination mode assignment in complex ( 1).
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