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

Authors

Weidong Chen, Chinese Academy Of Sciences
Haibo Yu, University of WollongongFollow
Guotao Wu, Chinese Academy Of SciencesFollow
Teng He, Chinese Academy Of Sciences
Zhao Li, Chinese Academy Of Sciences
Zaiping Guo, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow
Zhenguo Huang, University of WollongongFollow
Ping Chen, Dalian Institute of Chemical PhysicsFollow

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 (23), 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

Additional Grant Number

http://purl.org/au-research/grants/ARC/DE120101496

http://purl.org/au-research/grants/ARC/FT110100034

http://purl.org/au-research/grants/ARC/DP140102858