Diethyl {[5-(2,4-dichloro­phen­yl)-1,3,4-thia­diazol-2-ylamino](4-methoxy­phenyl)methyl}­phospho­nate

The title compound, C20H22Cl2N3O4PS, was synthesized by the reaction of N-(4-methoxy­benzyl­idene)-5-(2,4-dichloro­phenyl)-1,3,4-thia­diazol-2-amine and diethyl phosphite. In the crystal, inter­molecular C—H⋯O and N—H⋯O hydrogen bonds link the mol­ecules

N-{(E)-4-[(E)-(Dodecyl­imino)meth­yl]benzyl­idene}dodecan-1-imine

The title compound, C32H56N2, was synthesized by the reaction of terephthalaldehyde and dodecan-1-amine. The imines adopt trans conformations, with the two halves of the mol­ecule related to each other by a centre of symmetry

2-(2,4-Dichloro­phen­yl)-3-[5-(3,5-dimethyl­phen­yl)-1,3,4-thia­diazol-2-yl]thia­zolidin-4-one

The title compound, C19H15Cl2N3OS2, was synthesized by the reaction of N-(2,4-dichloro­phen­yl)-5-(3,5-dimethyl­phen­yl)-1,3,4-thia­diazol-2-amine and mercaptoacetic acid. The thia­zolidinone ring adopts a twist conformation. The 2,4-dichloro­phenyl ring is almost perpendicular to the thia­diazole ring, the dihedral angle being 82.8 (2)°. The 3,5-dimethyl­phenyl ring is nearly coplanar with the thia­diazole ring, the dihedral angle being 2.7 (2)°. An intramolecular C—H⋯N hydrogen bond is present