5,11,17,23-Tetra­nitro-25,26,27,28-tetra­pentyl­oxycalix[4]arene

The mol­ecule of the title compound, C₄₈H₆₀N₄O₁₂, is located on a crystallographic twofold rotation axis. It is found in the typical pinched cone conformation. The dihedral angles between the reference plane (defined by the C atoms of the methyl­ene bridges) and the benzene rings are 83.33 (6) and 141.61 (5)°.

5,11,17,23-Tetra-tert-butyl-25,26,27,28-tetra­pentoxycalix[4]arene

The mol­ecule of the title compound, C₆₄H₉₆O₄, adopts the typical pinched-cone conformation. The dihedral angles between the reference plane (defined by the C atoms of the methyl­ene bridges) and the benzene rings are 86.88 (4), 136.64 (5), 87.22 (4) and 133.99 (4)°.