Acta Cryst. (2002). E58, m540-m542  [ doi:10.1107/S1600536802015994 ]

A nanoporous three-dimensional metal coordination polymer {(NH₄)₂Zn[C₆H₂(COO)₄]·8H₂O}_n

Y.-Q. Sun, J. Zhang and G.-Y. Yang

Abstract: The title compound, poly[ammonium zinc--benzene-1,2,4,5-tetracarboxylate octahydrate] {(NH₄)₂Zn[C₆H₂(COO)₄]·8H₂O}_n, forms a three-dimensional network containing one-dimensional nanoporous rhomboid channels along the c axis, accommodating guest water molecules and the ammonium cations. The dimensions of the large channel are 11.555  (2) × 15.00  (1)  Å. The network consists of [Zn(C₆H₂(COO)₄]^2- anions containing tetrahedral Zn atoms bonded to four carboxylate groups. The ZnO distances range from 1.974  (2) to 1.978  (2)  Å. The ammonium cations and the water molecules are associated in a centrosymmetric network by intermolecular hydrogen bonds. The hydrogen bonding is essential to stabilize the crystal structure.

Online 13 September 2002

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