2,11-Dibromo-5,8-dibutyl[4]helicene

2,11-Dibromo-5,8-dibutyl[4]helicene

Blog Article

A racemic mixture of the title compound, C26H26Br2, a brominated [4]helicene, crystallizes, forming columns of stacked molecules.There are two crystallographically unique molecules in the asymmetric unit, Bike Units - BMX both with the same helical handedness.As is typical with helicene congeners, the unique molecules show short interatomic contacts between H atoms at the fjord region, with H.

H distances of 1.87 and 1.94 Å.

Molecules with the same helical handedness segregate in the crystal packing, forming homochiral columns.The stacked molecules are piled in a Rear End Cap column with alternate orientations.The shortest C.

C distance in the stacked molecules is 3.306 (4) Å.