meso-(1S*,21R*)-25-Methyl-8,11,14-trioxa-22,24,25-triaza­tetra­cyclo­[19.3.1.0^2,7.0^15,20]penta­cosa-2,4,6,15(20),16,18-hexa­ene-23-thione chloro­form monosolvate

The title compound crystallizes as a chloro­form solvate, C₂₀H₂₃N₃O₃S·CHCl₃, with two crystallographically independent units. The independent units have distinctly different inter­action patterns between the aza­crown macrocycle and the chloro­form solvent mol­ecule. In one of them, the chloro­form mol­ecule forms C—H...N and Cl...H—C hydrogen bonds with the aza­crown macrocycle (as a proton donor and an acceptor, respectively), whereas in the other, one of the chloro­form mol­ecules is bound to the aza­crown macrocycle by an attractive Cl...O [3.080 (3) Å] inter­action. The aza­crown macrocycles of different units are structurally similar; the aza-14-crown-3-ether ring adopts a bowl conformation with dihedral angles between the planes of the fused benzene rings of 60.7 (1) and 68.0 (1)°. The triazinane­thione ring in both cases has a sofa conformation. The crystal packing is characterized by N—H...S, N—H...O, C—H...Cl and C—H...S hydrogen bonds.