Received 16 October 2012
In the title compound, C14H11NOS, the phenothiazine unit has a butterfly conformation and the central six-membered ring has a boat form. The fold angle between the benzene rings is 46.39 (7)°, which is larger than found in similar compounds, probably as a result of steric repulsion between the phenothiazine fragment and the acetyl group.
For the structures of related N-alkylphenothiazine derivatives, see: Chu & Van der Helm (1974, 1975) and of related N-acetylphenothiazine derivatives, see: Meester & Chu (1986); Wang et al. (2009); Siddegowda et al. (2011).
Data collection: CrystalClear (Rigaku, 2008); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 2012); software used to prepare material for publication: CrystalStructure (Rigaku, 2010).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: FY2074 ).
This work was supported by Research for Promoting Technological Seeds from the Japan Science and Technology Agency (JST).
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