What is the chemical name of NH3BH3

Ammonium borane

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Ammonium borane is a chemical compound from the borane group.

Extraction and presentation

The reaction of diborane, present as a tetrahydrofuran complex, with ammonia mainly gives its diammonium salt [H.2B (NH3)2]+, (Bra4). However, if borane is used instead of diborane, then ammonium borane results.[4]

$ \ mathrm {\ BH_3 + NH_3 \ longrightarrow H_3BNH_3} $


Ammonium borane has a structure similar to that of ethane, the large difference in the melting point of the two compounds being due to the highly polar nature of ammonium borane. The B-N distance is 1.58 Å, the B-H distance is 1.15 Å, and the N-H distance is 0.96 Å.


Ammonium borane is being discussed as a storage substance for hydrogen gas as a fuel for vehicles.[5] The hydrogen can be released by heating, whereby it is first converted into (NH2bra2)n and then to (NHBH)n decomposed.[6] Its hydrogen storage density is higher than liquid hydrogen.[7]

Ammonium borane is also used in organic syntheses as a stable variant of diborane.[8]

Individual evidence

  1. ↑ Ammonia borane (GfsChemicals)
  2. 2,02,12,2data sheet Borane-ammonia complex at Sigma-Aldrich, accessed March 20, 2011.
  3. ↑ Since December 1, 2012, only GHS hazardous substance labeling has been permitted for substances. Until June 1, 2015, the R-phrases of this substance can still be used to classify preparations, after which the EU hazardous substance labeling is of purely historical interest.
  4. ↑ S.G. Shore, K.W. Boeddeker: Large Scale Synthesis of H.2B (NH3)2+bra4 and H3NBH3. In: Inorganic Chemistry. 1964, 3, pp. 914-15, doi: 10.1021 / ic50016a038.
  5. ↑ Rebirth for Hydrogen Tanks (Technology Review).
  6. ^ "Hydrogen gets on board", Maciej Gutowski and Tom Autrey, Royal Society of Chemistry.
  7. ↑ Frances H. Stephens, Vincent Pons, R. Tom Baker: Ammonia borane: the hydrogen source par excellence?. In: Dalton Transactions, 2007, pp. 2613-2626, doi: 10.1039 / b703053c.
  8. ↑ G.C. Andrews: Borane ammonia. In Encyclopedia of Reagents for Organic Synthesis, 2004, doi: 10.1002 / 047084289X.rb238.pub2.