Complex compounds of tetraalkylammonium perchlorates with aluminum borohydride

Abstract

1. Complex compounds with the composition R4N[(ClO4)Al (BH4)3], where R = CH3, C2H5, and C4H9, were obtained by the direct interaction of aluminum borohydride with tetraalkylammonium perchlorate. 2. According to the data of the IR spectra, the nature of the bond of the BH4 groups to aluminum in the anion [(ClO4)Al (BH4)4] is the same as in the anion Al (BH4) 4 − . The perchlorato group is monodentately bonded to the Al atom, as in the anion [Al(ClO4)6—. 3. The complex compounds R4N (ClO4)Al(BH4)3] are stable at ∼20°, but are sensitive to mechanical influence. The tetrabutylammonium complex decomposes slowly in the interval 100–200° with the liberation of diborane and hydrogen.