C. Krieger et al., PAIR STACKING OF 10-(4-NITROPHENYL)-5(10H)-PHENAZINYL RADICALS, Acta crystallographica. Section C, Crystal structure communications, 51, 1995, pp. 1420-1423
The title radicals, C18H12N3O2.0.5C(6)H(6), are arranged in radical pa
irs along the a axis with specific overlap of the pi systems, leading
to short intermolecular contacts between atoms with large spin populat
ions.