Acta Cryst. (2009). E65, m175-m176  [ doi:10.1107/S1600536809000713 ]

2-Acetylpyridinium 3-amino-2-chloropyridinium tetrachloridocobaltate(II)

A. Adamski, V. Patroniak and M. Kubicki

Abstract: In the title complex, (C₅H₆ClN₂)(C₇H₈NO)[CoCl₄], the Co^II ions are tetrahedrally coordinated. The crystal structure is built from hydrogen-bonded centrosymmetric tetramers of tetrachloridocobaltate(II) dianions and 3-amino-2-chloropyridinium cations, additionally strengthened by significant - stacking of pyridinium rings [interplanar distance 3.389 (3) Å]. The tetramers are linked by N-HCl hydrogen bonds into chains; the second kind of cations, viz. 2-acetylpyridinium, are connected by N-HCl hydrogen bonds to both sides of the chain. The Co-Cl bond lengths in the dianion correlate with the number of hydrogen bonds accepted by the Cl atom. An intramolecular C-HCl interaction is also present.

Online 10 January 2009

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