meso -(1 S ,21 R )-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.