V. Dryanska et al., SPECTRAL PROPERTIES AND MOLECULAR-STRUCTURE OF 4-ARYL-3-CYANO-1,1-DIPHENYL-2-AZABUTADIENES, Spectroscopy letters, 29(6), 1996, pp. 1067-1077
A detailed UV-VIS, lR, H-1 and C-13 NMR spectroscopic study of (Z)- an
d (E)-isomers of a series of the title compounds afforded a number of
spectral criteria, which could be reliably used for configurational as
signment of other compounds of similar type.