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Kolekcje
Inne
Synthesis, spectral and magnetic properties and crystal structures of copper(II) pyridinecarboxylates as potential antimicrobial agents.
Autorzy
Rok wydania
2007
Czasopismo
Numer woluminu
360
Strony
2711-2720
DOI
10.1016/j.ica.2007.01.022
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Synthesis and characterization of six new complexes [Cu{2,6-(MeO) 2 nic} 2 (H 2 O)] 2 (1), [Cu{2,6-(MeO) 2 nic} 2 (H 2 O)] 2 ·3DMF (2), where 2,6-(MeO) 2 nic is 2,6-dimethoxynicotinate and DMF is N,N-dimethylformamide, [Cu(3-pyacr) 2 (H 2 O) 2 ] n (3), where 3-pyacr is trans-3-(3-pyridyl)acrylate, [Cu(en) 2 (H 2 O) 2 ]X 2 , where X is 2,6-(MeO) 2 nic (4) or 3-pyacr (5) and en is ethylenediamine, and [Cu(3-pyacr) 2 (dien)(μ-H 2 O) 0.5 ] 2 ·7H 2 O (6), where dien is diethylenetriamine are reported. The characterizations were based on elemental analysis, infrared, electronic and EPR spectra, and magnetic measurements over a temperature range of 1.8–300K. Crystal structures of complexes 2, 4 and 6 have been determined by X-ray single crystal structure analysis. The available evidence supports dimeric structure of the acetate type for 1 and 2. Crystal structure of polymeric complex 3 has been determined from X-ray powder diffraction data. The 3-pyacr anions in pairs form bridges between two octahedrally surrounded copper(II) atoms in such a way that one 3-pyacr is coordinated to the first Cu II by an oxygen atom of its carboxyl group and to the second Cu II by the nitrogen atom of its pyridine ring, while the other is coordinated to the same two Cu II atoms in a similar way, but the other way round. Environment about the copper(II) atom for 4 and 5 is a square bipyramid (4+2).In complex 6 both Cu II central atoms are bridged only by an axial water molecule forming a dimeric structure with the considerably long separation of Cu II atoms of 5.194Å and the angle Cu1–O3–Cu1a of 150.79°. Moreover, results of the quantitative determination of antimicrobial activity of the complexes as well as above organic ligands alone are discussed.
Słowa kluczowe
crystal structure, chelating ligands, antimicrobial agent, molecule, 6-Dimethoxynicotinate, Copper(II) complexes, trans-3-(3-Pyridyl)acrylate
Adres publiczny
https://doi.org/ 10.1016/j.ica.2007.01.022
Strona internetowa wydawcy
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