The short-range structure and disorder of polyanilines is discussed by cons
idering backbone geometry, conformation and sp(2)/sp(3) hybridization of ni
trogen atom. The comparison between polymer and oIigomer spectra shows that
ring deformation modes are very sensitive to static/dynamic disorder. Low
energy Raman and inelastic neutron allow to distinguish two class of emeral
dine salts (ES I/ES-II) already distinguished from X-Ray Powder patterns.