10-Benzyl-10H-phenothiazine 9-oxide

Optical and electrochemical properties of ethynylaniline derivatives of phenothiazine, phenothiazine-5-oxide and phenothiazine-5,5-dioxide

Modifications in the sulfur oxidation state of phenothiazine results in dramatic changes to the excited-state geometry with little effect on the HOMO energy.

10-(6-Hy-droxy-hexa-2,4-diyn-1-yl)-10H-phenothia-zine 5-oxide

The title compound, C(18)H(13)NO(2)S, has two independent mol-ecules (A and B) with similar conformations in the asymmetric unit. Both phenothia-zine moieties have a butterfly structure [dihedral angles between benzene rings = 155.17 (7) and 161.71 (7)°, respectively], and the central six-membered rings have a boat form. In the crystal, the A and B mol-ecules stack alternately along the b axis. The A and B mol-ecules are linked by O-H⋯O=S hydrogen bonds, forming zigzag chains along [10-1].

3-Butyl-2-phenyl-1,3-thia-zolidine-1,4-dione

In the title compound, C₁₃H₁₇NO₂S, the thia­zolidine-1,4-dione ring adopts an envelope conformation with the S atom lying 0.631 (4) Å out of the plane formed by the other four ring atoms; the phenyl ring is almost perpendicular [88.74 (8)°] with respect to the ring C—C—N—C atoms and the butyl chain is in a fully extended conformation. In the crystal, a supra­molecular two-dimensional arrangement arises from weak inter­molecular C—H⋯O inter­actions.

10-Benzyl-10H-phenothiazine 9-oxide. Corrigendum

Corrigendum to Acta Cryst. (2009), E65, o1799.

The chemical name of the title compound in the paper by Xu, Sun, Yang & Wang [Acta Cryst. (2009), E65, o1799] is corrected.