1,7-Dicarba-closo-dodecaboran
M-CARBORANE
CAS: 16986-24-6
Molecular Formula: C2H12B10
1,7-Dicarba-closo-dodecaboran - Names and Identifiers
1,7-Dicarba-closo-dodecaboran - Physico-chemical Properties
| Molecular Formula | C2H12B10 |
| Molar Mass | 144.23 |
| Melting Point | 272 °C |
| Water Solubility | insoluble |
| Storage Condition | Room Temprature |
| MDL | MFCD00151574 |
1,7-Dicarba-closo-dodecaboran - Risk and Safety
| Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R22 - Harmful if swallowed |
| Safety Description | S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
1,7-Dicarba-closo-dodecaboran - Nature
| melting point | 272 °C |
| storage conditions | 2-8°C |
| morphology | solid |
| water solubility | insoluble |
| InChIKey | ISZOISTYZLLXNY-UHFFFAOYSA-N |
Last Update：2024-04-10 22:29:15
1,7-Dicarba-closo-dodecaboran - Overview
The metacarborane C2B10H12 has an icosahedral structure and is the first icosahedral carborane discovered and prepared. Subsequently, a method of isomerizing ortho-derivatives into meta-and para-isomers has been developed. For example, at high temperatures (I. e., 600°C) with a short residence time, ortho-methane can be rearranged or isomerized to m-methane during the flow of a heat pipe. At these temperatures, metacarborane vapor may burn or explode if it comes into contact with air. Therefore, this method has no practical application for industrial operations. Another method for isomerizing carborane involves thermal rearrangement of large silyl groups substituted ortho-carbamates into metal isomers at a much lower temperature than in the prior art. In contrast to earlier flow methods, this bulk isomerization is prone to occur at reflux temperatures and can be performed using conventional laboratory equipment.
Last Update：2024-04-10 22:29:15
1,7-Dicarba-closo-dodecaboran - Security information
| dangerous goods mark | Xn,Xi |
| hazard category code | 36/37/38-22 |
| safety instructions | 37/39-26 |
| WGK Germany | 3 |
| RTECS number | HS9290000 |
| TSCA | Y |
| customs code | 29420000 |
Last Update：2024-04-10 22:29:15
1,7-Dicarba-closo-dodecaboran - Preparation
metacarborane is prepared as follows: to a 500ml three-necked flask equipped with a mechanical stirrer, nitrogen inlet and thermometer, add carborane-siloxane polymer (10g) and tetrahydrofuran (100ml) available from the trademark Dexsil202, and add potassium fluoride solution (1g KF · 2H2O dissolved in 50 ml of water) at one time. A drop of methyltrialkyl ammonium chloride surfactant labeled Adogen464 was added while stirring and cooling in an ice water bath. The cooling bath was removed and the two-phase reaction mixture was stirred at ambient temperature for 16 hours. The reaction mixture is transferred to a separatory funnel and the layers are separated. The organic layer was washed with saturated sodium chloride solution (100ml), dried (with MgSO4), and filtered. Evaporate the solvent to obtain a viscous residue. Vacuum sublimation produces 2.79g (93% of theoretical value) intercarborane, which is analyzed by nuclear magnetic resonance and infrared spectroscopy and high performance liquid phase retention time with real samples.
Last Update：2024-04-10 22:29:15
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CAS: 16986-24-6
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