Research Article: Poly[[triaqua­(μ3-4-oxidopyridine-2,6-dicarboxyl­ato)thulium(III)] monohydrate]

Date Published: April 01, 2011

Publisher: International Union of Crystallography

Author(s): Zhu-Qing Gao, Dong-Yu Lv, Jin-Zhong Gu, Hong-Jin Li.


In the title coordination polymer, {[Tm(C7H2NO5)(H2O)3]·H2O}n, the TmIII atom is eight-coordinated by a tridentate 4-oxidopyridine-2,6-dicarboxyl­ate trianion, two monodentate anions and three water mol­ecules, forming a distorted bicapped trigonal–prismatic TmNO7 coordination geometry. The anions bridge adjacent TmIII ions into double chains. Adjacent chains are further connected into sheets. O—H⋯O hydrogen bonds involving both coordinated and uncoordinated water mol­ecules generate a three-dimensional supra­molecular framework.

Partial Text

For the structures and properties of lanthanide coordination compounds including the isotypic Dy and Eu analogues, see: Qin et al. (2011 ▶); Lv et al. (2010 ▶); Gao et al. (2006 ▶). For structures of complexes containing eight-coordinate TmIII, see: Qin et al. (2011 ▶); Tian et al. (2009 ▶).




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