Abstract
The results of studies devoted to ionic compounds of fullerenes, which are of interest for the design of new materials with promising physical properties, are analyzed. The preparation methods of these compounds and their electrophysical, magnetic and optical properties, and the molecular and electronic structures of monomeric, dimeric and polymeric fullerene anions are considered. The results of investigations of fullerenes in various charge states by electronic, IR, EPR and 13C NMR spectroscopies are presented. The bibliography includes 266 references.