Acta Cryst. (2009). C65, m451-m454 [ doi:10.1107/S010827010903772X ]
Abstract: The structures of three isomorphous compounds, namely bis(2,6-dibromopyridinium) tetrabromidocuprate(II) dihydrate, (C5H4Br2N)2[CuBr4]·2H2O, bis(2,6-dibromopyridinium) tetrabromidocadmate(II) dihydrate, (C5H4Br2N)2[CdBr4]·2H2O, and bis(2,6-dibromopyridinium) tetrabromidomercurate(II) dihydrate, (C5H4Br2N)2[HgBr4]·2H2O, show a crystal supramolecularity represented by M-Br
H-O-HBr-M intermolecular interactions along with (![[pi]](/logos/entities/pi_rmgif.gif)
)N-HOH2 hydrogen-bonding interactions forming layers connected via aryl-aryl face-to-face stacking of cations, leading to a three-dimensional network. The anions have significantly distorted tetrahedral geometry and crystallographic C2 symmetry. The stability of this crystal lattice is evidenced by the crystallization of a whole series of isomorphous compounds.
Formula: (C5H4Br2N)2[CuBr4]·2H2O, (C5H4Br2N)2[CdBr4]·2H2O and (C5H4Br2N)2[HgBr4]·2H2O
 |   Structure factor file (CIF format) (94.6 kbytes) |
| Structure factor file (CIF format) (100.2 kbytes) |
| Structure factor file (CIF format) (99.7 kbytes) |
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