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Inicio » Actividades I+D > Publicaciones 2010 > Aqua(oxydiacetato-κ3O,O′,O″)(pyridine-3-...
artículo con referato
"Aqua(oxydiacetato-κ3O,O′,O″)(pyridine-3-carboxamide-κN1)copper(II), sesquihydrate"
M. Perec and R. Baggio
Acta Cryst. C 66(11) (2010) m339-m342
In the monomeric title compound, [Cu(C4H4O5)(C6H6N2O)(H2O)]·1.5H2O, the CuII cation is bound in a square-pyramidal coordination to a tridentate oxydiacetate (ODA) ligand, a monodentate pyridine-3-carboxamide (p3ca) ligand and one aqua ligand, where the two organic ligands form the basal plane and the water O atom occupies the unique apical site. The ODA ligand presents a slight out-of-plane puckering in its central ether O atom, while the p3ca ligand is essentially planar. The availability of efficient donors and acceptors for hydrogen bonding results in the formation of strongly linked hydrogen-bonded bilayers parallel to (101), with an interplanar distance of 3.18 (1) Å and a stacking separation between the bilayers of 3.10 (1) Å, both of them governed by extended ππ interactions. The disordered nature of the solvent water molecules around inversion centres is discussed. The monoaqua compound is compared with the octahedral diaqua analogue, [Cu(C4H4O5)(C6H6N2O)(H2O)2], reported recently [Perec & Baggio, Acta Cryst. C65, m296-m298 (2009)].
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