1,1-Dimethyldiborane

1,1-Dimethyldiborane
Names
Preferred IUPAC name
1,1-Dimethyldiborane(6)
Other names
Unsymmetrical dimethyldiborane
Identifiers
3D model (JSmol)
  • InChI=1S/C2H10B2/c1-4(2)5-3-6-4/h3H2,1-2H3[1]
    Key: KEWIJCBOFAPULG-UHFFFAOYSA-N[2]
  • C[B]1(C)[H][BH2][H]1
Properties
C2H10B2
Molar mass 55.72 g·mol−1
Appearance Colorless gas
Melting point −150.2 °C (−238.4 °F; 123.0 K)
Boiling point −4 °C (25 °F; 269 K)
Solubility in organic solvents Soluble in ether, pentane, tetrahydrofuran
Thermochemistry
-25 kcal/mol
Hazards
NFPA 704 (fire diamond)
[2]
NFPA 704 four-colored diamondHealth (blue): no hazard codeFlammability 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g. diesel fuelInstability 2: Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water. E.g. white phosphorusSpecial hazards (white): no code
2
2
Related compounds
Related alkyl boranes
 Methyldiborane
Trimethyldiborane
Tetramethyldiborane
Trimethylborane
Diethyldiborane
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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1,1-Dimethyldiborane is the organoboron compound with the formula (CH3)2B(μ-H)2BH2. A pair of related 1,2-dimethyldiboranes are also known.[3] It is a colorless gas that ignites in air.

  1. ^ Jane E. Macintyre, ed. (1994-11-10). Dictionary of Organometallic Compounds. CRC Press. p. 468. ISBN 9780412430602.
  2. ^ Baker, Charles J. (2001). The Fire Fighter's Handbook of Hazardous Materials. Jones & Bartlett Learning. p. 152. ISBN 9780962705212.
  3. ^ Srebnik, Morris; Cole, Thomas E.; Brown, Herbert C. (January 1987). "Methylborane - a remarkable unhindered monoalkylborane which achieves the controlled sequential hydroboration of representative alkenes". Tetrahedron Letters. 28 (33): 3771–3774. doi:10.1016/s0040-4039(00)96380-9.