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A new ambient-temperature, catalyst-free reaction between ammonia borane and tetrahydrofuran borane has produced aminodiborane by the formation of a dihydrogen bond and subsequent molecular hydrogen elimination. Aminodiborane is used for preparing an inorganic butane analogue, N[H.sub.3]B[H.sub.2]N[H.sub.2]B[H.sub.3], and its single-crystal structure has exhibited a gauche rather than an anti form conformation.

Abstract: A new ambient-temperature, catalyst-free reaction between ammonia borane and tetrahydrofuran borane produces aminodiborane via the formation of a dihydrogen bond and subsequent molecular hydrogen elimination. The facile synthesis of aminodiborane will make this long-sought active chemical reagent readily available for both inorganic and organic reactions. From aminodiborane, an inorganic butane analogue, NH3BH2NH2BH3, was prepared, and its single-crystal structure displayed a gauche rather than an anti form conformation. [ABSTRACT FROM AUTHOR]