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Lookup NU author(s): Gary Nichol,
Emeritus Professor Bill Clegg
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The title compound [systematic name: ammonium pyrimidine-2,4-5,6(1H,3H)- tetrone 5-oximate], NH4 +·C4H2N3O4 -, crystallizes from water in the triclinic space group P and is isomorphous with a known rubidium complex [Gillier (1965). Bull. Soc. Chim. Fr. pp. 2373-2384]. The principal feature of the structure is hydrogen bonding; each ammonium H atom acts as a bifurcated donor and three of the four violurate O atoms are bifurcated acceptors, with the fourth acting as a trifurcated acceptor. The pattern of hydrogen bonding around the cation is very similar to the rubidium coordination environment in the related structure. The violurate anions pack as hydrogen-bonded crinkled tapes, which are linked and separated by the ammonium cations to give a compact three-dimensional structure. © International Union of Crystallography 2007.
Author(s): Nichol GS, Clegg W
Publication type: Article
Publication status: Published
Journal: Acta Crystallographica Section C: Crystal Structure Communications
ISSN (print): 0108-2701
ISSN (electronic): 1600-5759
Publisher: Wiley-Blackwell Publishing, Inc.
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