title: Utilization of IR spectral detailed analysis for coordination mode determination in novel Zn-cyclen-aminoacid complexes.
abstract: The infrared spectra, elemental and thermal (TG/DTG and DTA) analyses of novel [Zn(cyclen-κ4N1,4,7,10)(HGly-κ2O,O')](ClO4)2 (1), and [Zn2(cyclen-κ4N1,4,7,10)2(μ-S-Ala-κ2N,O)](ClO4)(3)·2H2O (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 Zn2+-cyclen unit. Therefore the crystal structure determination of the crystalline complex [Zn(cyclen-κ4N1,4,7,10)(NO3-κ2O,O')](NO3) was attached in order to support the coordination mode assignment in complex (1).
authors.affiliation: Department of Inorganic chemistry, Institute of Chemistry, University of P.J. Šafárik, 04154 Košice, Slovak Republic. zuzana.vargova@upjs.sk
authors.forename: Z
authors.initials: Z
authors.lastname: Vargová
authors.forename: M
authors.initials: M
authors.lastname: Almáši
authors.forename: L
authors.initials: L
authors.lastname: Arabuli
authors.forename: K
authors.initials: K
authors.lastname: Györyová
authors.forename: V
authors.initials: V
authors.lastname: Zeleňák
authors.forename: J
authors.initials: J
authors.lastname: Kuchár
mesh_terms: D000042:Absorption; D000409:Alanine / Q000737:chemistry*; D000080027:Cyclams; D005998:Glycine / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000737:chemistry*; D008958:Models, Molecular; D013055:Spectrophotometry, Infrared; D013696:Temperature; D015032:Zinc / Q000737:chemistry*
chemical_list: D000080027:Cyclams; D006571:Heterocyclic Compounds; C038072:cyclen; D015032:Zinc; D000409:Alanine; D005998:Glycine