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Synthesis, crystallographic and spectroscopic studies of dimeric CuI complexes with Schiff-base-containing triazole ligands.
Autorzy
Rok wydania
2003
Czasopismo
European Journal of Inorganic Chemistry
Strony
1548-1554
DOI
10.1002/ejic.200390202
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
New CuI complexes of the Schiff-base-containing triazole ligands N-[(E)-(4-chlorophenyl)methylidene]-4H-1,2,4-triazol-4-amine (ClPhtrz) and N-[(E)-phenylmethylidene]-4H-1,2,4-triazol-4-amine (Phtrz) have been synthesised and characterised. Depending on the reaction conditions ClPhtrz forms two different dimeric complexes 1 and 2. X-ray crystallography revealed that each copper centre exhibits a planar trigonal coordination in 1, while the tetrahedral coordination sphere of the copper centre in 2 is completed by a solvent molecule. In dimeric complex 3 the tetrahedral coordination of the CuI ions is formed by two monodentate and two bidentate (bridging) Phtrz ligands. Complexes 1−3 are unstable and easily lose coordinating and/or solvating acetonitrile molecules giving 4 (from 1 and 2) and 5 (from 3). On the basis of ESI MS and 1H NMR and UV/Vis spectroscopy, it was shown that dimeric complexes 1−5 do not survive upon dissolution and dissociate rapidly forming mainly a 1:2 monomeric complex, along with a minor 1:1 complex.
Adres publiczny
https://doi.org/10.1002/ejic.200390202
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