Naslov
Hydrogen-bonded frameworks of mercury(II) complexes with pyridinedicarboxylic acids

Autori
Soldin, Željka ; Kukovec, Boris-Marko ; Matković- Čalogović, Dubravka ; Popović, Zora

Izvornik
Australian journal of chemistry (0004-9425) 71 (2018), 6; 455-462

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
hydrogen bond motif ; mercury(II) ; pyridinedicarboxylic acids

Sažetak
Three novel mercury(II) coordination compounds, [HgCl(2, 4-pydcH2)(2, 4-pydcH)]·2H2O (1) and [HgCl(2, 6-pydcH)(H2O)]·3H2O (2) that exhibit hydrogen-bonded 3D frameworks, and [Hg(2, 6- pydcH)2]·2H2O (3), exhibiting only hydrogen- bonded 1D chains (2, 4-pydcH2 = pyridine-2, 4- dicarboxylic acid ; 2, 6-pydcH2 = pyridine-2, 6-dicarboxylic acid), were prepared in the reactions of the corresponding pyridinedicarboxylic acid with mercury(II) chloride or mercury(II) acetate. Compounds 1–3 were prepared by conventional solution synthesis. Only the hydrogen-bonded 1D chain of 3 was robust enough to be prepared by mechanochemical synthesis. The crystal structures of 1–3 were determined by the single-crystal X-ray diffraction method. Neutral 2, 4-pydcH2 and partially deprotonated 2, 4-pydcH‒ act as N, O-bidentate ligands in the structure of 1 whereas crystal structure analysis reveals O, N, O′-tridentate 2, 6- pydcH‒ ligand in the structures of 2 and 3. Compounds 1–3 were characterised by IR spectroscopy in the solid state, and compounds 1 and 2 were also characterised by 1H and 13C NMR spectroscopy in DMSO solution. Thermal properties of 1–3 were also investigated. NMR data support a collapse of the hydrogen-bonded frameworks of 1 and 2 in DMSO solution, and the existence of monomeric species in DMSO solutions.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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