Reactions of dodecahydro-closo-dodecaboric acid with chitosan

A donor-acceptor interaction between H⁺-cations of dodecahydro-closo-dodecaboric acid and the amine group of chitosan results in the generation of chitosanium dodecahydro-closo-dodecaborate, (C₆O₄H₉NH₃)₂B₁₂H₁₂ — water-insoluble salt. The presence of four pairs of donor oxygen atoms in its composition makes for the existence of (C₆O₄H₉NH₃)₂B₁₂H₁₂× nH₂B₁₂H₁₂ (0 < n ≤ 4) compounds. When treating the latter with gaseos ammonia, the compounds of (C₆O₄H₉NH₃)₂B₁₂H₁₂×n(NH₄)₂B₁₂H₁₂ (0 < n ≤ 4) composition are formed. The individuality of the compounds was confirmed by IR and X-ray PE spectral studies, chemical and X-ray phase analyses, and thermogravimetry.