A racemic mixture of the title compound, C26H 26Br2, a brominated helicene, crystallizes, forming columns of stacked mol-ecules. There are two crystallographically unique mol-ecules in the asymmetric unit, both with the same helical handedness. As is typical with helicene congeners, the unique mol-ecules show short inter-atomic contacts between H atoms at the fjord region, with H⋯H distances of 1.87 and 1.94 Å. Mol-ecules with the same helical handedness segregate in the crystal packing, forming homochiral columns. The stacked mol-ecules are piled in a column with alternate orientations. The shortest C⋯C distance in the stacked mol-ecules is 3.306 (4) Å.
|Journal||Acta Crystallographica Section E: Structure Reports Online|
|Publication status||Published - 2012 Apr|
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics