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International Union of Crystallography, Acta Crystallographica Section E: Structure Reports Online, 4(64), p. m529-m530, 2008

DOI: 10.1107/s1600536808005758

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Poly[[aqua-μ3-picolinato-μ2-picolinato-dipicolinatopotassium(I)terbium(III)] 2.5-hydrate]

Journal article published in 2008 by Luís Cunha-Silva ORCID, Paula C. R. Soares-Santos, Helena I. S. Nogueira, Tito Trindade, Jacek Klinowski, João Rocha ORCID, Filipe A. Almeida Paz
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

In the title compound, [KTb(C6H4NO2)4(H2O)]·2.5H2O, each Tb3+ centre is coordinated by four N and five O atoms from five distinct picolinate ligands in a geometry resembling a highly distorted tricapped trigonal prism. One of the ligands establishes a skew bridge between neighbouring Tb3+ centres, leading to the formation of one-dimensional anionic polymeric chains, {[(C6H4NO2)4Tb]−}n, running along the direction [010]. Each K+ cation is seven-coordinated by six O atoms from one anionic polymeric chain and one water mol­ecule [K⋯O 2.676 (3)–3.208 (4) Å]. The uncoordinated water mol­ecules are involved in O—H⋯O hydrogen bonding.