These parameters are similar to the previous data determined by SCXRD and PXRD . Indeed GSF-PEG IC is isostructural with the GSF-nitroethane solvate . The channels of GSF molecules, extending along the crystallographic c-axis, interact via C-H ... O and Cl ... O interactions (Figures and), as described previously . Positive density in the difference potential map between the GSF channels indicated the presence of the disordered PEG molecules.