
doi: 10.1007/bf00855404
1. Tetrabutylammonium borohydride was obtained by the exchange reaction of tetrabutylammonium bromide with excess sodium borohydride in ether isopropyl alcohol or benzene medium. 2. Tetrabutylammonium borohydride aluminate, [(C4H9)4N] [Al(BH4)4], was synthesized by the reaction of the tetrabutylammonium and aluminum borohydrides. 3. In the series of complex hydrides, containing the anions BH 4 − and [Al(BH4)4]− and the cation [R4N]+, the solubility in nonpolar solvents increases in a steady manner, while the melting point decreases, with increase in the length of the hydrocarbon chain R.
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