Tetramethyldiborane

Dimethylborane, (CH3)2BH is the simplest dialkylborane, consisting of a methyl group substituted for a hydrogen in borane. As for other boranes it normally exists in the form of a dimer called tetramethyldiborane or tetramethylbisborane or TMDB ((CH3)2BH)2. Other combinations of methylation occur on diborane, including monomethyldiborane, trimethyldiborane, 1,2-dimethylborane, 1,1-dimethylborane and trimethylborane. At room temperature the substance is at equilibrium between these forms. The methylboranes were first prepared by H. I. Schlesinger and A. O. Walker in the 1930s.

Tetramethyldiborane
Names
IUPAC name
Tetramethyldiborane(6)
Other names
Dimethylborane dimer
Identifiers
3D model (JSmol)
  • InChI=1S/C4H14B2/c1-5(2)7-6(3,4)8-5/h1-4H3
    Key: DAOILNUAERZCST-UHFFFAOYSA-N
  • InChI=1/C4B2H14/c1-5(2)7-6(3,4)8-5/h1-4H3
  • C[B]1(C)[H][B](C)(C)[H]1
Properties
(CH
3)
2BH
2B(CH
3)
2
Molar mass 83.777
Appearance Colorless liquid
Odor Pungent;
Melting point −72.5 °C (−98.5 °F; 200.7 K)
Boiling point 68.6 °C (155.5 °F; 341.8 K)
Hazards
NFPA 704 (fire diamond)
2
2
Related compounds
Related alkyl boranes
 trimethylborane
dimethyldiborane
diethylborane
Related compounds
 Borane
tetramethyl aluminium hydride
tetramethyl gallium hydride

methylalane

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N (what is YN ?)
Infobox references
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.