CRYSTAL AND MOLECULAR-STRUCTURE OF N-PHENYL-4-NITROBENZAMIDOXIME

N-Phenyl-4-nitrobenzamidoxime has been studied by X-ray structural ana lysis. In two crystallographically independent molecules 1A and 1B, am idoxime groups adopt a planar Z configuration, and these fragments are in an s-trans conformation with respect to the =N-O and C-N(H) bonds; an intramolecular NH...O bond occurs. The nitrophenyl and phenyl grou ps are rotated with respect to the amidoxime plane [ONCN] by -57 and - 32 degrees in 1A and -38 and -22 degrees in 1B, respectively. The rota tion of the fragments about the C(1)-N(2) bond is -28 (1A) and -35 deg rees (1B). In crystals, molecules 1A and 1B are linked in oxime dimers through two intermolecular =N...(HO)' hydrogen bonds; dimers form dou ble chains through two NH...(O2N)'' hydrogen bonds.