Syntheses and crystal structure of a (2,6-diiso-propyldi-naphtho-[2,1-d:1',2'-f][1,3]dithiepin-4-yl)(phen-yl)methanol atropisomer.

The racemic title compound, C(34)H(32)OS(2), comprises an atropisomeric binaphthyl di-thio-acetal substituted at the methyl-ene carbon atom with a chiral benzyl alcohol. The two naphthalene ring systems are additionally substituted at the 3,3'-position with isopropyl groups. The overall stereochemistry is defined as aS,R and aR,S. The hydroxyl group forms an intra-molecular O-H⋯S hydrogen bond to one of the sulfur atoms. The crystal structure contains weak C-H⋯π inter-actions that link the mol-ecules into extended arrays.