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Diborane

See also: diborane(2) and diborane(4)
Diborane
Stereo skeletal formula of diborane with all explicit hydrogens added and assorted measurements
Stereo skeletal formula of diborane with all explicit hydrogens added and assorted measurements
Ball and stick model of diborane
Ball and stick model of diborane
Names
IUPAC name
Diborane(6)
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.039.021 Edit this at Wikidata
EC Number
  • 242-940-6
RTECS number
  • HQ9275000
UNII
UN number 1911
  • InChI=1S/B2H6/c1-3-2-4-1/h1-2H2 checkY
    Key: KLDBIFITUCWVCC-UHFFFAOYSA-N checkY
  • InChI=1/B2H6/c1-3-2-4-1/h1-2H2
    Key: KLDBIFITUCWVCC-UHFFFAOYAF
  • [BH2]1[H][BH2][H]1
Properties
B2H6
Molar mass 27.67 g·mol−1
Appearance Colorless gas
Odor repulsive and sweet
Density 1.131 g/L[1]
Melting point −164.85 °C (−264.73 °F; 108.30 K)[1]
Boiling point −92.49 °C (−134.48 °F; 180.66 K)[1]
Reacts[2]
Solubility in other solvents Diglyme and Diethyl Ether,[3]
Vapor pressure 39.5 atm (16.6 °C)[2]
Structure
Tetrahedral (for boron)
see text
0 D
Thermochemistry
56.7 J/(mol·K)[4]
232.1 J/(mol·K)[4]
36.4 kJ/mol[4]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 toxic, highly flammable, reacts with water
GHS labelling:
GHS02: FlammableGHS06: ToxicGHS08: Health hazard
Danger
H220, H314, H330, H370, H372
P210, P260, P264, P270, P271, P280, P284, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P307+P311, P310, P314, P320, P321, P363, P377, P381, P403, P403+P233, P405, P410+P403, P501
NFPA 704 (fire diamond)
[6]
NFPA 704 four-colored diamondHealth 4: Very short exposure could cause death or major residual injury. E.g. VX gasFlammability 4: Will rapidly or completely vaporize at normal atmospheric pressure and temperature, or is readily dispersed in air and will burn readily. Flash point below 23 °C (73 °F). E.g. propaneInstability 3: Capable of detonation or explosive decomposition but requires a strong initiating source, must be heated under confinement before initiation, reacts explosively with water, or will detonate if severely shocked. E.g. hydrogen peroxideSpecial hazard W: Reacts with water in an unusual or dangerous manner. E.g. sodium, sulfuric acid
4
4
3
W
38 °C (100 °F; 311 K)
Explosive limits 0.8–88%[2]
Lethal dose or concentration (LD, LC):
40 ppm (rat, 4 h)
29 ppm (mouse, 4 h)
40–80 ppm (rat, 4 h)
159–181 ppm (rat, 15 min)[5]
125 ppm (dog, 2 h)
50 ppm (hamster, 8 h)[5]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 0.1 ppm (0.1 mg/m3)[2]
REL (Recommended)
 TWA 0.1 ppm (0.1 mg/m3)[2]
IDLH (Immediate danger)
 15 ppm[2]
Safety data sheet (SDS) ICSC 0432
Related compounds
Related boron compounds
 Decaborane
BF3
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
checkY verify (what is checkY☒N ?)

Diborane(6), commonly known as diborane, is the chemical compound with the formula B2H6. It is a highly toxic, colorless, and pyrophoric gas with a repulsively sweet odor. Given its simple formula, borane is a fundamental boron compound. It has attracted wide attention for its electronic structure. Several of its derivatives are useful reagents.

  1. ^ a b c Haynes, p. 4.52.
  2. ^ a b c d e f NIOSH Pocket Guide to Chemical Hazards. "#0183". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ Yerazunis, S., et al. “Solubility of Diborane in the Dimethyl Ether and Diethylene Glycol, in Mixtures of Sodium Borohydride and Dimethyl Ether of Diethylene Glycol, and in Ditertiary Butyl Sulfide.” Journal of Chemical & Engineering Data, vol. 7, no. 3, July 1962, pp. 337–39, doi:10.1021/je60014a004.
  4. ^ a b c Haynes, p. 5.6.
  5. ^ a b "Diborane". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  6. ^ "DIBORANE – CAMEO Chemicals - Chemical Datasheet - Database of Hazardous Materials – NOAA". Retrieved 2022-10-26.

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ثنائي البوران Arabic دی‌بوران AZB Diborà Catalan Diboran Czech Diboran German Διβοράνιο(6) Greek Diborano Spanish دی‌بوران FA Diboraani Finnish Diborane French

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