Abstract:
The crystal structure of the title compound, C20H18N2O8, has been investigated to establish the relative stereochemistry between the ester groups. The cyclohexane ring adopts a chair conformation, in which the two ester groups occupy the adjacent equatorial positions in a trans relationship with each other. The molecules assemble in the crystal as chains along the c axis via C-H center dot center dot center dot pi interactions between the cyclohexane ring and a pair of nitrophenyl rings of the neighbouring molecule. Also observed are pi-pi stacking interactions between the nitrophenyl rings of neighbouring chains, with a perpendicular distance between these rings of 3.409 angstrom and a slippage of 0.969 angstrom.