2,3-Dimethyl-2-butene
Synonym(s):Tetramethylethylene
- CAS NO.：563-79-1
- Empirical Formula: C6H12
- Molecular Weight: 84.16
- MDL number: MFCD00008897
- EINECS: 209-263-8
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:27:07
What is 2,3-Dimethyl-2-butene?
Chemical properties
colourless liquid
The Uses of 2,3-Dimethyl-2-butene
2,3-Dimethyl-2-butene was used in the preparation of thexyl NHC-borane (diMe-Imd-BH2thexyl).
General Description
2,3-Dimethyl-2-butene undergoes hydrolysis to form hydroxyl radical.
Purification Methods
Purify it by GLC on a column of 20% squalene on chromosorb P at 50o [Flowers & Rabinovitch J Phys Chem 89 563 1985]. Also wash it with 1M NaOH solution followed by H2O. Dry it over Na2SO4, distil it over powdered KOH under nitrogen and pass it through activated alumina before use. [Woon et al. J Am Chem Soc 108 7990 1986, Wong et al. J Am Chem Soc 109 3428 1987, Beilstein 1 IV 853.]
Properties of 2,3-Dimethyl-2-butene
| Melting point: | -75 °C (lit.) |
| Boiling point: | 73 °C (lit.) |
| Density | 0.708 g/mL at 25 °C (lit.) |
| vapor pressure | 215 mm Hg ( 37.7 °C) |
| refractive index | n |
| Flash point: | 2 °F |
| storage temp. | 2-8°C |
| solubility | 0.071g/l |
| form | Liquid |
| color | Clear colorless to slightly yellow |
| Specific Gravity | 0.708 |
| explosive limit | 1.2%(V) |
| Water Solubility | Soluble in water (0.071 g/L) |
| Sensitive | Air Sensitive |
| BRN | 1361357 |
| Stability: | Stable. Highly flammable - readily forms explosive mixtures with air. Note low flash point. Incompatible with strong acids, strong oxidizing agents, peroxy compounds. |
| CAS DataBase Reference | 563-79-1(CAS DataBase Reference) |
| NIST Chemistry Reference | 2-Butene, 2,3-dimethyl-(563-79-1) |
| EPA Substance Registry System | 2-Butene, 2,3-dimethyl- (563-79-1) |
Safety information for 2,3-Dimethyl-2-butene
| Signal word | Danger |
| Pictogram(s) |
 Flame Flammables GHS02  Health Hazard GHS08 |
| GHS Hazard Statements |
H225:Flammable liquids H304:Aspiration hazard |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. |
Computed Descriptors for 2,3-Dimethyl-2-butene
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