OCTAKIS(3,5-DIMETHYLPHENYLTHIO)NAPHTHALENE

The title compound, C74H72S8, possesses a conformation which is unique for a per(arylthio)naphthalene in that the side chains at one of the peri positions adopt a syn arrangement, whereas all molecules of this class studied previously uniformly exhibit anti arrangements at the pe ri positions. This asymmetric conformation is of the previously uncate gorized abbaabab type, where a and b denote side chains projecting, re spectively, above and below the mean plane of the naphthalene core. A significant non-planarity of the naphthalene core is imparted by a sub stantial twist around its central carbon-carbon bond characterized by the symmetry-independent intra-ring torsion angles.