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- W2228147053 abstract "The structural unit of the title compound, [K(C(6)H(3)N(2)O(4))(C(6)H(4)N(2)O(4))(H(2)O)(2)](n), consists of one potassium cation, one hydrogen pyrazine-2,3-dicarboxyl-ate anion, one pyrazine-2,3-dicarboxylic acid mol-ecule and two water mol-ecules; this is twice the asymmetric unit, since the potassium cation lies on an inversion centre. Each anion or acid mol-ecule is linked to two potassium cations, while the potassium cation has contacts to four symmetry-equivalent organic ligands, with two different coordination modes towards this cation. In addition, each potassium cation is coordinated by two water O atoms, raising the coordination number to eight. One of the carboxyl groups of the acid retains its H atom, which forms a hydrogen bond to a coordinated water mol-ecule. The other carboxyl group is deprotonated in half of the ligands and protonated in the other half, taking part in a strong O-H⋯O hydrogen bond disordered over an inversion centre. The stabilization of the crystal structure is further assisted by O-H⋯O and O-H⋯N hydrogen bonds in which water acts as the donor." @default.
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- W2228147053 date "2007-12-15" @default.
- W2228147053 modified "2023-10-16" @default.
- W2228147053 title "Poly[diaqua(μ<sub>2</sub>-3-carboxypyrazine-2-carboxylato)(μ<sub>2</sub>-pyrazine-2,3-dicarboxylic acid)potassium(I)]" @default.
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- W2228147053 doi "https://doi.org/10.1107/s1600536807066202" @default.
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