3-(2-Methyl-1,3-benzo­thia­zol-3-ium-3-yl)propane-1-sulfonate monohydrate

In the title hydrated zwitterion, C₁₁H₁₃NO₃S₂·H₂O, the N—C—C—C and C—C—C—S torsion angles in the side-chain are 171.06 (14) and 173.73 (12)°, respectively. In the crystal, inversion-related mol­ecules are π-stacked with an inter­planar separation of 3.3847 (2) Å. O—H...O hydrogen bonds link inversion-related mol­ecules with a pair of water mol­ecules to form R₄²(8) rings. The closest S...S contact is 3.4051 (15) Å between inversion-related mol­ecules.

Crystal structure of 5-[bis­(4-eth­oxy­phenyl)amino]­thio­phene-2-carbaldehyde

In the title compound, C₂₁H₂₁NO₃S, the planes of the two benzene rings are nearly perpendicular to one another [dihedral angle = 84.50 (10)°] and they are oriented with respect to the plane of the thio­phene ring at dihedral angles of 59.15 (9) and 66.61 (9)°. In the crystal, mol­ecules are linked by weak C—H...O hydrogen bonds, forming supra­molecular chains propagating along the b-axis direction.

Crystal structure of 4-eth­oxy-N-(4-eth­oxy­phen­yl)-N-phenyl­aniline

In the title compound, C₂₂H₂₃NO₂, the planes of the eth­oxy­benzene rings are oriented with respect to that of the phenyl ring at dihedral angles of 61.77 (8) and 84.77 (8)°, and they are twisted with respect to one another, with a dihedral angle of 80.37 (7)°. In the crystal, weak C—H...π inter­actions link the mol­ecules into supra­molecular chains propagating along [101].