5,11,17,23,29-Penta-tert-butyl-31,32,33,34,35-penta-propoxycalix[5]arene dichloro-methane hemisolvate.

The title compound, tert-butyl-propoxycalix[5]arene, C(70)H(100)O(5)·0.5CH(2)Cl(2), crystallizes as a solvate with two mol-ecules of calix[5]arene in 1,2-alternate conformations and one mol-ecule of dichloro-methane in the asymmetric unit. One tert-butyl group in one of the mol-ecules and two in the other are disordered over two positions with occupancy factors fixed at 0.5917:0.4083, 0.5901:0.4099 and 0.8535:0.1465, respectively, in the final refinement. The C atoms of a prop-oxy group in each of the mol-ecules are also disordered over two positions with occupancies of 0.7372:0.2628 and 0.5027:0.4973. The mol-ecules form intra-molecular hydrogen bonds between prop-oxy O atoms and an adjacent CH(2) group in a neighbouring prop-oxy chain. In the crystal, inter-molecular C-H⋯O and C-H⋯Cl inter-actions occur involving the dichloro-methane mol-ecule.