S. Dunne et al., AN ORTHORHOMBIC POLYMORPH OF 2,2'-DIPYRIDYL DISELENIDE, Acta crystallographica. Section C, Crystal structure communications, 54, 1998, pp. 887-889
X-ray analysis has established the crystal structure of a non-centrosy
mmetric polymorph of 2,2'-dipyridyl diselenide, C10H8N2Se2, at ambient
temperature, The molecular structure is very similar to the low-tempe
rature structure of the centrosymmetric monoclinic form reported recen
tly. The crystal packing in the two polymorphs is compared.