Acta Crystallographica Section E

Structure Reports Online

Volume 68, Part 12 (December 2012)

metal-organic compounds

Acta Cryst. (2012). E68, m1497-m1498    [ doi:10.1107/S1600536812046508 ]

Dipyridinium diaqua­bis­(pyrazole-3,5-di­carboxyl­ato-[kappa]2N,O)cuprate(II) dihydrate

Y. Si

Abstract: In the mononuclear title salt, (C5H6N)2[Cu(C5H2N2O4)2(H2O)2]·2H2O, the CuII ion is located on an inversion centre and is coordinated by two chelating pyrazole-3,5-dicarboxyl­ate anions and two water mol­ecules, forming a Jahn-Teller-distorted CuN2O4 octa­hedron. O-H...O and N-H...O hydrogen bonds are formed between water mol­ecules, complex anions and the pyridine counter-cations, leading to the formation of layers parallel to (100). The layers are held together by weak C-H...O hydrogen bonds.

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