title: Ammonium Aminodiboranate: A Long-Sought Isomer of Diammoniate of Diborane and Ammonia Borane Dimer.
abstract: Ammonium aminodiboranate ([NH4 ][BH3 NH2 BH3 ]) is a long-sought isomer of diammoniate of diborane ([NH3 BH2 NH3 ][BH4 ]) and ammonia borane (NH3 BH3 ) dimer. Our results show that [NH4 ][BH3 NH2 BH3 ] is stable in tetrahydrofuran at -18 °C and decomposes rapidly to NH3 BH2 NH2 BH3 and H2 at elevated temperatures. The decomposition pathway is dictated by the dihydrogen bonding between H(δ+) on NH4 (+) and H(δ-) on BH3 , as confirmed by theoretical calculations. This is in contrast to the interconversion between [NH3 BH2 NH3 ][BH4 ] and (NH3 BH3 )2 , although all three have dihydrogen bonds and the same stoichiometry.
authors.affiliation: National Laboratory for Clean Energy, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, Liaoning, P. R. China.|University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Chen
authors.affiliation: School of Chemistry, University of Wollongong, New South Wales, 2522, Australia.
authors.forename: Haibo
authors.initials: H
authors.lastname: Yu
authors.affiliation: National Laboratory for Clean Energy, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, Liaoning, P. R. China.
authors.forename: Guotao
authors.initials: G
authors.lastname: Wu
authors.affiliation: National Laboratory for Clean Energy, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, Liaoning, P. R. China.
authors.forename: Teng
authors.initials: T
authors.lastname: He
authors.affiliation: National Laboratory for Clean Energy, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, Liaoning, P. R. China.|University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
authors.forename: Zhao
authors.initials: Z
authors.lastname: Li
authors.affiliation: Institute for Superconducting and Electronic Materials (ISEM), University of Wollongong, New South Wales, 2522, Australia.
authors.forename: Zaiping
authors.initials: Z
authors.lastname: Guo
authors.affiliation: Institute for Superconducting and Electronic Materials (ISEM), University of Wollongong, New South Wales, 2522, Australia.
authors.forename: Huakun
authors.initials: H
authors.lastname: Liu
authors.affiliation: Institute for Superconducting and Electronic Materials (ISEM), University of Wollongong, New South Wales, 2522, Australia. zhenguo@uow.edu.au.
authors.forename: Zhenguo
authors.initials: Z
authors.lastname: Huang
authors.affiliation: National Laboratory for Clean Energy, Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, Liaoning, P. R. China. pchen@dicp.ac.cn, pchen@dicp.ac.cn.|State Key Laboratory of Catalysis and The Collaborative Innovation Center for Chemistry for Energy Materials (iChEM), Dalian Institute of Chemical Physics (DICP), Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, Liaoning, P. R. China. pchen@dicp.ac.cn, pchen@dicp.ac.cn.
authors.forename: Ping
authors.initials: P
authors.lastname: Chen
keywords: aminodiboranes; boranes; boron; hydrogen bonds