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SM ISO690:2012 CROITOR, Lilia, COROPCEANU, Eduard, FONARI, Marina. Anion-pyridine-n-oxime interplay to control metal-metal separations in a series of Cu(ii) coordination polymers. In: CrystEngComm, 2022, vol. 24, pp. 6146-6154. ISSN 1466-8033. DOI: https://doi.org/10.1039/d2ce01000c |
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CrystEngComm | ||||||
Volumul 24 / 2022 / ISSN 1466-8033 | ||||||
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DOI:https://doi.org/10.1039/d2ce01000c | ||||||
Pag. 6146-6154 | ||||||
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Rezumat | ||||||
Ten mixed-ligand one-(1D) and two-dimensional (2D) Cu(ii) coordination polymers that include: {[Cu(SiF6)(4-pyaoH)4]·dmf·0.5H2O}n (1), {[Cu(mal)(4-pyaoH)2]·dmf}n (2), {[Cu(mal)2](4-pyaoH2)2}n (3), [Cu(adi)(3-pyaoH)2(H2O)]n (4), [Cu(adi)(3-pyaoH)2]n (5), {[Cu(adi)(3-pyaoH)2]·0.6MeOH·0.3H2O}n (6), {[Cu(seb)(3-pyaoH)2]·H2seb·H2O}n (7), [Cu(ClO4)(2-pyao)(2-pyaoH)]n (8), {[Cu(oxa)(2-pyaoH)]·H2O}n (9) and {[Cu3(μ3-OH)(2-pyao)3(fum)]·6.5H2O}n (10) were obtained by reactions of Cu(ii) salts with binary blends of isomeric pyridine-n-oximes (n-pyaoH, n = 2-4) and dicarboxylic acids (oxalic = H2oxa, malonic = H2mal, fumaric = H2fum, succinic = H2suc, adipic = H2adi, and sebacic = H2seb). Compounds 1-4, and 8, 9 represent chain-type coordination polymers with the single Cu(ii) atom as a metal building block bridged by the inorganic or organic anions while the pyridine-n-oxime ligands occupy the terminal positions and coordinate in the monodentate or bidentate-chelate coordination mode. The extension of structures up to 2D coordination networks in 5-7 is derived from the bidentate-bridging function of the neutral 3-pyaoH ligand acting through the N-pyridine and O-hydroxyl binding sites. A linear coordination polymer 10 is unique in this series bearing trinuclear [Cu3(μ3-OH)(2-pyao)3]2+ metallacrown cores bridged by fumarato linkers. The possibility to tune the Cu(ii)⋯Cu(ii) separations in the reported 1D and 2D coordination polymers through coordination and intermolecular H-bonds was demonstrated and discussed. |
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Cuvinte-cheie Chelation, Copper compounds, ligands, Negative ions, Organic polymers, Organometallics, Oxalic acid |
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