Supra­molecular structures of bis-thiono­oxalamic acid esters derived from (±)-cyclo­hexane-1,2-diamine and (±)-1,2-diphenyl­ethyl­enediamine

The bis-thiono­oxalamic acid esters trans-(±)-diethyl N,N′-(cyclo­hexane-1,2-di­yl)bis­(2-thio­oxamate), C₁₄H₂₂N₂O₄S₂, and (±)-N,N′-diethyl (1,2-diphenyl­ethane-1,2-di­yl)bis­(2-thioox­amate), C₂₂H₂₄N₂O₄S₂, both consist of conformationally flexible mol­ecules which adopt similar conformations with approximate C₂ rotational symmetry. The thio­amide and ester parts of the thio­oxamate group are significantly twisted along the central C—C bond, with the S=C—C=O torsion angles in the range 30.94 (19)–44.77 (19)°. The twisted s-cis conformation of the thiono­oxamide groups facilitates assembly of mol­ecules into a one-dimensional polymeric structure via inter­molecular three-center C=S...NH...O=C hydrogen bonds and C—H...O inter­actions formed between mol­ecules of the opposite chirality.