Syntheses and study on nickel and copper complexes with 1,3,5-benzenetricarboxylic acid. Crystal and molecular structure of [Cu3(mdpta)3(btc)](ClO4)3 · 4H2O |
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Authors: | Pavel Kopel,Jiří Kamení ček,Vá clav Petří ček,Ale&scaron Kurečka,Božena Kalinska,Jerzy Mrozinski |
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Affiliation: | 1. Department of Inorganic Chemistry, Faculty of Science, Palacký University, K?í?kovského 10, CZ-771 47 Olomouc, Czech Republic;2. Institute of Physics, Academy of Science, Na Slovance 10, CZ-18221 Prague, Czech Republic;3. Faculty of Chemistry, University of Wroclaw, 14 F. Joliot-Curie, PL-50 383 Wroclaw, Poland |
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Abstract: | Nickel and copper complexes containing 1,3,5-benzenetricarboxylic acid, with a combination of selected N-donor ligands and Schiff bases, of the composition Ni3(bimz)6(btc)2 · 12H2O (1), Ni3(btz)9(btc)2 · 12H2O (2), Ni2(L1)(btc) · 7H2O (3), Ni3(L2)2(Hbtc) · 9H2O (4), Ni2(L3)(btc) · 4H2O (5), Cu2(L4)(btc) · 7H2O (6), [Cu3(pmdien)3(btc)](ClO4)3 · 6H2O (7) and [Cu3(mdpta)3(btc)](ClO4)3 · 4H2O (8); H3btc = 1,3,5-benzenetricarboxylic acid, bimz = benzimidazole, btz = 1,2,3-benztriazole, L1 = 2-[(phenylimino)methyl]phenol, L2 = N,N′-bis-(salicylidene)propylenediamine, L3 = 2-{[(2-nitrophenyl)methylene]amino}phenol, L4 = 2-[(4-methoxy-phenylimino)methyl]phenol, pmdien = N,N,N′,N″,N″-pentamethyldiethylenetriamine, mdpta = N,N-bis-(3-aminopropyl)methylamine, have been synthesized. The complexes have been studied by elemental analysis, IR, UV–Vis spectroscopies, magnetochemical and conductivity measurements and selected compounds also by thermal analysis. The crystal and molecular structure of complex 8 was solved. The complex is trinuclear with btc3−-bridge. The coordination polyhedron around each copper atom can be described as a distorted square with a CuON3 chromophore formed by one oxygen atom of carboxylate and three nitrogen atoms of mdpta. The magnetic properties of 8 have been studied in the 1.8–300 K temperature range revealing a very weak antiferromagnetic exchange interaction with J = −0.56 cm−1 for g = 2.13(9). The antimicrobial activities against selected strains of bacteria were evaluated. It was found that only complex 5 is able to inhibit the growth of Staphylococcus strains. |
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Keywords: | Nickel(II) Copper(II) 1,3,5-Benzenetricarboxylic (trimesic) acid complexes X-ray structure Magnetic properties |
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