Received 10 February 2012
The title salt, [K2(C16H12O6)]n, was obtained by the reaction of 1,2-bis[4-(ethyl-carboxyl)-phenoxyl]ethane with KOH in water. The anion lies on a crystallographic inversion center, which is located at the mid-point of the central C-C bond. The K+ cation is coordinated by six O atoms, two from the chelating carboxylate group of the anion and four from four neighboring and monodentately binding anions, giving rise to an irregular [KO6] coordination polyhedron. The coordination mode of the cation leads to the formation of K/O layers parallel to (100). These layers are linked by the nearly coplanar anions (r.m.s. deviation of 0.064 Å of the carboxyl, aryl and O-CH2 groups from the least-squares plane) into a three-dimentional network.
For the preparation, structures, properties and applications of metal carboxylate compounds, see: Ma et al. (2005); Su et al. (2010); Zhang & Chen (2008); Zhu et al. (2008). For the preparation of the precusor, see: Ma & Yang (2011). For standard bond lengths, see: Allen et al. (1987).
Data collection: SMART (Bruker, 2001); cell refinement: SAINT (Bruker, 2002); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: publCIF (Westrip, 2010).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: WM2592 ).
The authors are grateful for financial support from the Scientific Fund of Guangxi University (X061144) and the Opening Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology (K008).
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