Acta Crystallographica Section B

Structural Science

Volume 56, Part 1 (February 2000)

Acta Cryst. (2000). B56, 142-154 [doi:10.1107/S0108768199011283]

Channel- and layer-type anionic host structures in inclusion compounds of urea, tetraalkylammonium terephthalate/trimesate and water

F. Xue and T. C. W. Mak

Abstract: New crystalline adducts of tetraalkylammonium terephthalate/trimesate with urea and water molecules result from hydrogen-bond directed assembly of complementary acceptors and donors, and the anionic host lattices are described using the graph-set notation to identify distinct hydrogen-bonding motifs and patterns. Tetra-n-butylammonium terephthalate-urea-water (1/6/2), C₄₆H₁₀₄N₁₄O₁₂ (1), triclinic, space group P1, a = 8.390 (2), b = 9.894 (2), c = 18.908 (3) Å, [alpha] = 105.06 (2), [beta] = 94.91 (1), [bold gamma] = 93.82 (2)°, Z = 1, is composed of hydrogen-bonded terephthalate-urea layers, which are intersected by urea layers to generate a three-dimensional network containing large channels for accommodation of the cations. Tetraethylammonium terephthalate-urea-water (1/1/5), C₂₅H₅₈N₄O₁₀ (2), triclinic, P1, a = 9.432 (1), b = 12.601 (1), c = 14.804 (1) Å, [alpha] = 79.98 (1), [beta] = 79.20 (1), [bold gamma] = 84.18 (1)°, Z = 2, has cations sandwiched between hydrogen-bonded anionic layers. Tetraethylammonium trimesate-urea-water (1/2/7.5), C₃₅H₈₆N₇O_15.5 (3), triclinic, P1, a = 13.250 (1), b = 14.034 (1), c = 15.260 (1) Å, [alpha] = 72.46 (1), [beta] = 78.32 (1), [bold gamma] = 66.95 (1)°, Z = 2, manifests a layer-type structure analogous to that of (2). Tetra-n-propylammonium hydrogen trimesate-urea-water (1/2/5), C₃₅H₇₈N₆O₁₃ (4), orthorhombic, Pna2₁, a = 16.467 (3), b = 33.109 (6), c = 8.344 (1) Å, Z = 4, features hydrogen trimesate helices in a three-dimensional host architecture containing nanoscale channels each filled by a double column of cations.

Online 1 February 2000


	Structure factor file (CIF format) (258.4 kbytes) Contains datablock compd1

	Structure factor file (CIF format) (225.6 kbytes) Contains datablock compd2

	Structure factor file (CIF format) (341.2 kbytes) Contains datablock compd3

	Structure factor file (CIF format) (234.5 kbytes) Contains datablock compd4

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