Borane

Borane, also known as borine, is an unstable and highly reactive molecule with the chemical formula BH
3. The preparation of borane carbonyl, BH3(CO), played an important role in exploring the chemistry of boranes, as it indicated the likely existence of the borane molecule. However, the molecular species BH3 is a very strong Lewis acid. Consequently, it is highly reactive and can only be observed directly as a continuously produced, transitory, product in a flow system or from the reaction of laser ablated atomic boron with hydrogen. It normally dimerizes to diborane in the absence of other chemicals.

Not to be confused with bornane.
This article is about a specific compound. For the class of compounds, see boranes. For the edition of the Hebrew Bible known as BH5, see Biblia Hebraica Quinta.
Borane
Names
IUPAC names
Borane
Systematic IUPAC name
Borane (substitutive)
Trihydridoboron (additive)
Other names
  • borine
  • boron trihydride
  • hydrogen boride
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
44
PubChem CID
  • InChI=1S/BH3/h1H3
    Key: UORVGPXVDQYIDP-UHFFFAOYSA-N
SMILES
  • B
Properties
BH3
Molar mass 13.83 g·mol−1
Appearance colourless gas
Conjugate acid Boronium
Thermochemistry
Std molar
entropy (S⦵298)
 187.88 kJ mol−1 K−1
Std enthalpy of
formation (ΔfH⦵298)
 106.69 kJ mol−1
Structure
Point group
 D3h
Molecular shape
 trigonal planar
0 D
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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