New bis(naphthalic anhydride)s with organoelement central groupings and poly(naphthaoylene benzimidazole)s on their basis

New bis(naphthalic anhydride)s with organoelement diphenylsilyl and m‐carboranyl groups have been obtained by interaction of acenaphthene dichloroanhydrides of the respective dicarboxylic acids in Friedel‐Crafts reaction followed by oxidation of the bis(acenaphthyl)s and anhydridization of the synthesized tetracarboxylic acids. Interaction of the anhydrides and bis(‐o‐phyenylenediamine)s yielded poly(naphthoylene benzimidazole)s, which combine good thermal characteristics with solubility in organic solvents and possess thermosetting properties.