Hexamethylenetetrammonium Dodecahydro-
closo-Dodecaborate: Synthesis and Study

V. I. Saldin^a, M. A. Karpenko^a, L. N. Ignat’eva^a, Yu. M. Nikolenko^a,
V. M. Buznik^a, and Yu. M. Mikhailov^b

^a Institute of Chemistry, Far East Division, Russian Academy of Sciences,
pr. Stoletiya Vladivostoka 159, Vladivostok, 690022 Russia

^b Institute of Problems of Chemical Physics, Chernogolovka Branch, Russian Academy of Sciences,
Chernogolovka, Moscow oblast, 142432 Russia

Received October 30, 2007

Abstract—The reaction of dodecahydro-closo-dodecaboric acid with hexamethylenetetramine (urotropin) was
studied by potentiometric titration, chemical and X-ray diffraction analyses, thermogravimetry, and IR and
Xray photoelectron spectroscopy. The donor–acceptor bond with acid H⁺ cations involves only one of the
nitrogen donor atoms of hexamethylenetetramine. The product (C₆H₁₂N₄H)₂B₁₂H₁₂ is isolated as a finely crys-
talline, easily filterable, and poorly soluble precipitate. A saturated solution of the product contains no more
than 0.4 g of the salt per 100 g.

DOI: 10.1134/S0036023609010033

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