N,N'-Dithiobis(phthalimide)-nitrobenzene (2/1): a Pn solvate with localised solvent molecules lordered head-to-tail in channels

N,N'-Dithiobisphthalimide crystallizes from nitrobenzene solution as a solvate, 2C(16)H(8)N(2)O(4)S(2).C6H5NO2, having space group Pn. The bisphthalimide molecules are linked by CD H ... O hydrogen bonds and by aromatic pi-pi-stacking interactions, forming a framework enclosing continuous channels running along the [100] direction and accounting for ca 20% of the unit-cell volume. The nitrobenzene molecules lie in these channels, ordered in a head-to-tail fashion and linked to the bisphthalimide framework by C-H ... O and C-H ... (arene) hydrogen bonds.