catena-Poly[[octaaquabis(μ₄-benzene-1,3,5-tricarboxylato)trizinc] tetrahydrate]

Abstract

Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.011 Å; R factor = 0.064; wR factor = 0.225; data-to-parameter ratio = 13.3.In the title compound, {[Zn 3 (C 9 H 3 O 6 ) 2 (H 2 O) 8 ]Á4H 2 O} n , there are two crystallographically independent Zn II ions. One presents a trigonal-bipyramidal coordination geometry defined by five O atoms [three from two carboxylate groups of two benzene-1,3,5-tricarboxylate (BTC) ligands and the other two deriving from three water molecules], while the other lies on an inversion centre and exists in a slightly distorted octahedral coordination geometry defined by six O atoms (two from two carboxylate groups of two BTC ligands and the others from four water molecules). A threedimensional framework is further strengthened via O-HÁ Á ÁO hydrogen-bonding interactons. Related literature

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