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The mol­ecular structure of the title compound, [CuCl2(C11H20N2S)2], shows the CuII atom with a distorted tetra­hedral geometry from two Cl atoms [Cu—Cl = 2.2182 (6) Å] and two thione S atoms [Cu—S = 2.3199 (6) Å]. The angles at the copper cation, which lies on a twofold rotation axis, are Cl—Cu—Cl = 142.84 (4)°, Cl—Cu—S = 94.80 (2) and 99.97 (2)°, and S—Cu—S = 132.46 (4)°. The planes of the two imidazolium rings make a dihedral angle of 76.92 (8)°.

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The mol­ecular structure of the title compound, C13H10N2O4, shows an almost planar conformation as the benzene rings make a dihedral angle of 2.31 (7)°. The nitro group lies in plane with the benzamide ring, with a C—C—N—O torsion angle of 0.6 (2)°. In the crystal, N—H...O and O—H...O hydrogen bonds link mol­ecules into sheets stacked along [10-1].

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The mol­ecular structure of the title compound, C18H21N3S, shows a twisted conformation with a dihedral angle of 67.45 (4)° between the aromatic ring planes and an N-C-C-S torsion angle of -5.01 (13)°. The imidazolidine ring and the aniline moiety make a dihedral angle of 56.03 (4)° and the asscociated C-N-C angle is 125.71 (10)°. The guanidine-like C=N double bond is clearly localized, with a bond length of 1.2879 (14) Å. The C-S-C angle is 102.12 (5)° and the S-C(aromatic) and S-C bond lengths are 1.7643 (11) and 1.8159 (12) Å.

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In the xanthene ring system in the title compound, C19H18O4, the 4H-pyran ring has a maximum deviation of 0.110 (2) Å from planarity and the cyclo­hexene ring exhibits a puckered conformation [puckering parameters QT = 0.452 (3) Å, θ = 57.0 (4) and φ = 131.7 (4)°]. The cyclo­hexene ring attached to the xanthene system adopts an envelope conformation, with the middle of the three methylene C atoms as the flap atom. In the crystal, O—H...O and C—H...O hydrogen bonds form infinite chains of R12(6) ring motifs along [100] with the xanthene groups arranged in an alternating zigzag manner.
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