Structure of zinc hydroxy-terephthalate: Zn3(OH)4(C8H4O4)

The new lamellar hydroxide teraphthalate Zn3(OH)4(C8H4O4) was synthesised by the hydrothermal method and was characterized by single crystal X-ray diffraction, IR and UV spectroscopy and thermogravimetric analysis. The compound crystallises in the monoclinic space group C2/c with: a=28.1000(5) Åa=28.1000(5) Å, b=6.3101(1) Åb=6.3101(1) Å, c=14.8359(3) Åc=14.8359(3) Å, β=121.564(1)°β=121.564(1)°, V=2241.43 Å3V=2241.43 Å3, Dx=2.538 g/cm3Dx=2.538 g/cm3 and Z=4Z=4. The zinc(II) atoms present four, five and six fold O-coordination. Due to the peculiar coordination of the zinc atoms, the inorganic layers form stairways running along [001]. These stairways-like layers are bridged by terephthalate (tp) groups leading to a 3D framework.

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