Mechanochemical Synthesis of Diborane(6) by Reactions of Alkaline Tetrahydroborates with Iron (III) Chloride
KLAVDIY G. MYAKISHEV and VLADIMIR V. VOLKOV
Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy
of Sciences, Pr. Akademika Lavrentyeva 3, Novosibirsk 630090 (Russia)
Pages: 207-210
Abstract
Reactions of FeCl3 with MBH4 (M = Li, Na, K) which take place during mechanical activation (MA) of mixtures of crystalline substances in a vibratory vacuum mill have been studied. The reactions form diborane(6) or B2H6; the product yields depend on the nature of MBH4, on the molar ratio of reagents, and on the mechanical activation time. Under optimal conditions, the yield of B2H6 is 81.5, 79.5, and 73.5% when LiBH4, NaBH4, and KBH4, respectively, are used. When mixtures of FeCl3 with MBH4 are heated without MA, reactions occur with liberation of H2, while B2H6 is not formed.
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