4,4 '-Di-tert-butyl-2,2 '-dipyridinium dichloride


In the title compound, C18H26N22+center dot 2Cl(-), the complete dication is generated by crystallographic inversion symmetry; both N atoms are protonated and engaged in strong and highly directional N-H center dot center dot center dot Cl hydrogen bonds. Additional weak C-H center dot center dot center dot Cl contacts promote the formation of a tape along ca. [110]. The crystal structure can be described by the parallel packing of these tapes. The crystal studied was a non-merohedral twin with twin law [-1 0 0, 0 -1 0, -0.887 0.179 1] and the final BASF parameter refining to 0.026 (2).



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Amarante, TR; Goncalves, IS; Paz, FAA

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We are grateful to the Fundacao para a Ciencia e a Tecnologia (FCT, Portugal) for their general financial support, for a PhD research grant No. SFRH/BD/64224/2009 (to TRA), and for specific funding toward the purchase of the single-crystal diffractometer.

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