Benzoin 4‐ethyl­thio­semicarbazone

In the title compound, 2‐hydr­oxy‐1,2‐diphenyl­ethanone 4‐ethyl­thio­semicarbazone, C₁₇H₁₉N₃OS, the thio­semi­carbazone moiety is planar and has an E configuration. The planar phenyl rings make dihedral angles of 82.34 (8) and 8.07 (17)° with the plane of the thio­semicarbazone moiety. The crystal structure contains two intra­molecular (N—H?O and N—H?N) and one inter­molecular inter­action (O—H?S), as well as two C—H?π(benzene) inter­actions. Mol­ecules are stacked in columns running along the a axis. Mol­ecules in each column are connected to each other by means of linear O—H?S hydrogen bonds and C—H?π inter­actions. In addition, there are also C—H?π(benzene) inter­actions between the columns.