Acta Crystallographica Section C

Crystal Structure Communications

Volume 63, Part 7 (July 2007)

metal-organic compounds

 

Tetraethylammonium dihydrogenarsenate bis(arsenic acid) and 1,4-diazoniabicyclo[2.2.2]octane bis(dihydrogenarsenate) arsenic acid: hydrogen-bonded networks containing dihydrogenarsenate anions and neutral arsenic acid molecules

C. Lee and W. T. A. Harrison

Abstract: The title compounds, (C₈H₂₀N)[H₂AsO₄][H₃AsO₄]₂, (I), and (C₆H₁₄N₂)[H₂AsO₄]₂[H₃AsO₄], (II), are unusual salts containing organic cations, dihydrogenarsenate anions and neutral arsenic acid molecules. In (I), the dihydrogenarsenate anion lies across a twofold rotation axis in the space group C2/c, while the cation is disordered across a centre of inversion. The [H₂AsO₄]^- and H₃AsO₄ species interact by way of O-HO hydrogen bonds, leading to sheets and a three-dimensional network for (I) and (II), respectively.

Formula: (C₈H₂₀N)[H₂AsO₄][H₃AsO₄]₂ and (C₆H₁₄N₂)[H₂AsO₄]₂[H₃AsO₄]

	Structure factor file (CIF format) (177.1 kbytes) [ doi:10.1107/S0108270107023967/gd3110Isup2.hkl ] Contains datablock I
	Structure factor file (CIF format) (304.1 kbytes) [ doi:10.1107/S0108270107023967/gd3110IIsup3.hkl ] Contains datablock II

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