Title

Ammonium aminodiboranate: A long-sought isomer of diammoniate of diborane and ammonia borane dimer

RIS ID

107220

Publication Details

Chen, W., Yu, H., Wu, G., He, T., Li, Z., Guo, Z., Liu, H., Huang, Z. & Chen, P. (2016). Ammonium aminodiboranate: A long-sought isomer of diammoniate of diborane and ammonia borane dimer. Chemistry - A European Journal, 22 7727-7729.

Abstract

Ammonium aminodiboranate ([NH4][BH3NH2BH3]) is a long-sought isomer of diammoniate of diborane ([NH3BH2NH3][BH4]) and ammonia borane (NH3BH3) dimer. Our results show that [NH4][BH3NH2BH3] is stable in tetrahydrofuran at -18°C and decomposes rapidly to NH3BH2NH2BH3 and H2 at elevated temperatures. The decomposition pathway is dictated by the dihydrogen bonding between Hδ+ on NH4 + and Hδ- on BH3, as confirmed by theoretical calculations. This is in contrast to the interconversion between [NH3BH2NH3][BH4] and (NH3BH3)2, although all three have dihydrogen bonds and the same stoichiometry.

Grant Number

ARC/DE120101496, ARC/FT110100034, ARC/DP140102858

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Link to publisher version (DOI)

http://dx.doi.org/10.1002/chem.201601375