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Inicio » Actividades I+D > Publicaciones 2009 > Two isomorphous crotonatolanthanide comp...
artículo con referato
"Two isomorphous crotonatolanthanide complexes: tetra-μ-but-2-enoato-bis[diaqua(but-2-enoato)Ln]-2,6-diaminopurine (1/2) (Ln = Dy and Ho)"
A.M. Atria, A. Astete, M.T. Garland and R. Baggio
Acta Cryst. C 65(11) (2009) m411-m414
The title isomorphous compounds, tetra-μ-but-2-enoato-bis[diaqua(but-2-enoato)dysprosium(III)]-2,6-diaminopurine (1/2), [Dy2(C4H5O2)6(H2O)4]·2C5H6N6, and tetra-μ-but-2-enoato-bis[diaqua(but-2-enoato)holmium(III)]-2,6-diaminopurine (1/2), [Ho2(C4H5O2)6(H2O)4]·2C5H6N6, consist of [Ln(crot)3(H2O)2]2 dimers (crot is crotonate or but-2-enoate; Ln is the lanthanide cation), built up around inversion centres and completed by 2,6-diaminopurine molecules. The lanthanide cation is coordinated by three chelating crotonate units and two water molecules. One of the chelating carboxylate groups acts also in a bridging mode sharing one O atom with both cations and the final result is a pair of DyO9 tricapped prismatic polyhedra linked to each other through a central (Dy-O)2 loop. A feature of the structures is the existence of a complex intermolecular interaction scheme involving two sets of tightly interlinked non-intersecting one-dimensional structures, one of them formed by the [Dy(crot)3(H2O)2]2 dimers (running along [100] and linked by O–HO hydrogen bonds) and the second formed by 2,6-diaminopurine molecules (evolving along [010] linked by N–HN hydrogen bonds).
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