Tetramethyldiborane
| Names | |
|---|---|
| IUPAC name
Tetramethyldiborane(6) | |
| Other names
Dimethylborane dimer | |
| Identifiers | |
3D model (JSmol) |
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CompTox Dashboard (EPA) |
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| 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) | |
| Related compounds | |
| 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).
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Infobox references | |
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.