Pm. Lahti et al., EXPERIMENTAL INVESTIGATION OF EXCHANGE IN ORGANIC OPEN-SHELL MOLECULAR BUILDING-BLOCKS FOR MAGNETIC-MATERIALS, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 271, 1995, pp. 147-154
Intramolecular exchange interactions in bis(arylnitrene)s obey the Bor
den-Davidson disjointness criterion, although variations in the size o
f the interaction occur as functions of conformation and -X- in the st
ructure :N-Aryl-X-Aryl-N:.