Crystal structure of a novel dimesogen

The title compound, 4-(cholestroxycarbonyl)pentyloxy-4'-heptyloxycarbbonylb iphenyl (C53H78O5), is a novel dimesogen comprising two mesogenic units dis similar in nature. It crystallizes in the orthorhombic space group P2(1)2(1 )2(1) with cell parameters a = 6.241(3), b = 17.943(5), c = 43.13(5), Z = 4 . The structure was solved using SHELXS (Sheldrick, 1997) and refined using SHELXL (Sheldrick, 1997). The final residual was R = 0.0803 for 1769 refle ctions with I > 2 sigma(I). In the crystal phase the molecule is linear and the terminal groups show stretching with higher bond distances. The packin g of the molecules shows imbrication, herringbone and stacking along the a, b, and c axes, respectively. The structure also exhibits an intermolecular hydrogen bond of the type CH...O. The space group suggests the possibility of a chiral mesophase.