Diastereomers of 4-(2-hydroxyphenyl)-2-phenyl-2,3,4,5-tetrahydro-1,5-benzothiazepine

The crystal structure of the title compound is composed of diastereomers of 4-(2-hydroxyphenyl)-2-phenyl-2,3,4,5-tetrahydro-1,5-benzothiazepine, C21H19NOS, that are cocrystallized. The asymmetric unit contains two molecules. One S and two C atoms of the heterocyclic ring in one molecule are disordered, resulting in two different conformers. The H atoms at the chiral centers in the ordered molecule are trans with respect to each other, cis in the other conformer. The average bond distances are: S-DCsp(3) 1.825 (2), S-Csp(2) 1.778 (8), N-Csp(3) 1.495 (5), N-Csp(2) 1.415 (8), O-C-aromatic 1.380 (7), Csp(3)-Csp(3) 1.533 (14), Csp(3)-C-aromatic 1.52 (2) and C-C-aromatic 1.382 (13) Angstrom. The structure is stabilized by strong intra- and intermolecular hydrogen bonds.