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Abstract

The structure of C₂B₁₀H₁₁.CH₂C₂₇H₄₅O was determined by X-ray diffraction. This compound crystallizes in the orthorhombic system with the P2₁2₁2₁ space group. The unit cell parameters are a = 994.0(4), b = 3 231.0(7), c = 1 039.6(2) pm, V = 3 338 . 10⁶ pm³, Z = 4, calculated density D_c = 1.080Mg m^-3. M_r = 542.9, linear absorption coefficient μ(MoK α) = 0.54 cm^-1 F(000) = 1 184. Intensities were measured at room temperature, radiation used λ(MoK α) = 71.073 pm. Final R = 0.063 for 2 099 observed independent reflections. The studied molecule is built from ortho-carborane icosahedron connected with the cholesterol through the methylene CH₂ group bonded to the icosahedral carbon atom C(B1) (C-C= 151.0(7) pm) and to the oxygen atom of the cholesterol (C-O = 138.3(7) pm). Valence angle C(B1)-C-O = 108(2)°, torsion angle C(B1)-C-O-C(3) = 164(4)°.