3-Benzyl-3-hydroxy-2-phenyl-3H-indole 1-oxide

Abstract

The asymmetric unit of the title compound, C21H17NO2, contains two crystallographically independent mol­ecules of similar geometry. The indole ring systems form dihedral angles of 8.30 (5) and 9.58 (5)° with the attached phenyl rings, and 56.96 (5) and 57.68 (5)° with the aromatic rings of the respective benzyl groups. The mol­ecular conformations are stabilized by intra­molecular C—H⋯O hydrogen bonds. In the crystal structure, centrosymmetrically related pairs of mol­ecules are linked into dimers through pairs of inter­molecular O—H⋯O hydrogen bonds, generating 12-membered rings with R 2 2(12) motifs. The dimers are further linked into a three-dimensional network by C—H⋯O inter­actions.