Synthesis and crystal structure of hydroquinone-beta-cyclodextrin complex

The title inclusion complex with the formula [(C42H70O35)(2) . (C6O2H6)(3) . (H2O)(21.2)(CH3OH)(2)] has been crystallized;ind characterized by single crystal X-ray analysis. The complex crystallizes in the triclinic system, s pace group P1, with a =1.5500 (1), b =1.5536(1), c = 1.8246(1) nm, a = 113. 17(2), beta = 99.12(2), gamma =103.37(3)degrees, V= 3.7739(4)nm(3), Z = 1; D-c = 1.343 g/cm(3), mu = 0.124 mm(-1), F(000) = 1594, R= 0.0795 and S = 0. 9639. Two independent molecules of beta -cyclodextrin (beta -CD) form a "he ad-to-head" dimer. The fairly important factor of the position and stabilit y of the guest in the host cavity is the solvation of the polar group of th e guest.