The crystal structure of 5-(2-nitrophenylmethylene)-2-thioxothiazolidin-4-one-3-(α-benzyl)ethanoic acid: Preference for the Z-configuration

X-ray crystal structure analysis of the title compound shows that it has the Z-configuration at the exocyclic double bond. Steric hindrance within the molecule is responsible for a considerable deviation from planarity in some regions of the molecule. The relationship of this compound to the structural pattern shown by other thiazolidin-4-one derivatives is briefly discussed.