title: Poly[(μ(5)-5-carboxylatotetrahydrofuran-2,3,4-tricarboxylic acid)sodium].
abstract: The search for the novel metal-organic frameworks (MOFs) materials using tetra-hydro-furan-2,3,4,5-tetra-carboxylic acid (THFTCA) as a versatile multi-carboxyl ligand, lead to the synthesis and the structure determination of the title compound, [Na(H(3)THFTCA)] or [Na(C(8)H(7)O(9))](n), which was obtained by a solution reaction at room temperature. The ligand is mono-deprotonated, coordinating five sodium ions through one furan oxygen atom and six carboxyl oxygen atoms. The sodium ion exhibits a distorted penta-gonal-bipyramidal NaO(7) geometry consisting of seven O atoms derived from five surrounding ligands. Two adjacent pentagonal bipyramids share an O-O edge, forming a dinuclear sodium cluster. Finally, these clusters are effectively linked by the carboxyl groups of THFTCA ligands, forming a firm metal organic framework and O-H⋯O hydrogen bonds contribute to the crystal packing.
authors.affiliation: College of Materials Science and Engineering, China Jiliang University, Hangzhou 310018, People's Republic of China.
authors.forename: Jie
authors.initials: J
authors.lastname: Xu
authors.forename: Wenxiang
authors.initials: W
authors.lastname: Chai
authors.forename: Jian
authors.initials: J
authors.lastname: Lin
authors.forename: Hongsheng
authors.initials: H
authors.lastname: Shi
authors.forename: Kangying
authors.initials: K
authors.lastname: Shu