Acta Crystallographica Section C

Crystal Structure Communications

Volume 60, Part 9 (September 2004)

bm1577 scheme

Acta Cryst. (2004). C60, o653-o655 [doi:10.1107/S0108270104017007]

Secondary interactions in the isomorphous compounds 2,6-bis(chloromethyl)pyridinium chloride and 2,6-bis(bromomethyl)pyridinium bromide

V. Lozano and P. G. Jones

Abstract: The title compounds, C₇H₈Cl₂N⁺·Cl^- and C₇H₈Br₂N⁺·Br^-, are isomorphous. In the crystal packing, layers parallel to the ac plane are formed by a classical N⁺-HX^- hydrogen bond (X = halogen) and two XX contacts. A third XX contact links the layers, and a fourth, which is however very long, completes a ladder-like motif of halogen atoms. Hydrogen bonds of the form C-HX play at best a subordinate role in the packing.

Formula: C₇H₈Cl₂N⁺·Cl^- and C₇H₈Br₂N⁺·Br^-

Online 11 August 2004


	Structure factor file (CIF format) (127.2 kbytes) Contains datablock I

	Structure factor file (CIF format) (138.7 kbytes) Contains datablock II

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