ALPHA,ALPHA,ALPHA,2,3,4,5,6-OCTAFLUOROACETANILIDE

Acetanilide and its derivatives have been the subject of some interest because of certain anomalous properties of the vibrational spectrum o f the amide group [Careri, Buontempo, Galluzi, Scott, Gratton & Shyams under (1984). Phys. Rev. B, 30, 4689-4702; Barthes (1995). Nonlinear E xcitations in Biomolecules, edited by M. Peyrard, pp. 209-221. Berlin: Springer]. In the title compound, C8HF8NO, the molecules are linked t hrough N-H ... O hydrogen bonds, with an intermolecular N ... O distan ce of 2.894 (9) Angstrom. They form chains parallel to the b axis whic h are stacked one on top of another in the c direction.