BIS(TRIMETHYLSILYL) MALONATE
Bis(trimethylsilyl)malonate
CAS: 18457-04-0
Molecular Formula: C9H20O4Si2
BIS(TRIMETHYLSILYL) MALONATE - Names and Identifiers
| Name | Bis(trimethylsilyl)malonate |
| Synonyms | octadecylsilane Malonic acid (tms) Malonic acid, bis-TMS Bis(trimethylsilyl)malonate Bis(trimethylsilyl) malonate BIS(TRIMETHYLSILYL) MALONATE Malonic acid bis(trimethylsilyl) ester Malonic acid, di(trimethylsilyl) ester MALONIC ACID BIS(TRIMETHYLSILYL) ESTER Propanedioic acid, bis(trimethylsilyl) ester |
| CAS | 18457-04-0 |
| EINECS | 242-342-5 |
| InChI | InChI=1/C18H40Si/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19/h2-18H2,1,19H3 |
| InChIKey | ATCKJLDGNXGLAO-UHFFFAOYSA-N |
BIS(TRIMETHYLSILYL) MALONATE - Physico-chemical Properties
| Molecular Formula | C9H20O4Si2 |
| Molar Mass | 248.42 |
| Density | 0.974 g/mL at 25 °C (lit.) |
| Melting Point | 56 °C |
| Boling Point | 63-66 °C/1 mmHg (lit.) |
| Flash Point | 75°F |
| Vapor Presure | 0.000118mmHg at 25°C |
| Appearance | Liquid |
| Specific Gravity | 0.97 |
| Color | Clear colorless to straw |
| BRN | 2212115 |
| pKa | 12.18±0.46(Predicted) |
| Storage Condition | 2-8°C |
| Sensitive | 7: reacts slowly with moisture/water |
| Refractive Index | n20/D 1.416(lit.) |
BIS(TRIMETHYLSILYL) MALONATE - Risk and Safety
| Hazard Symbols | F - Flammable |
| Risk Codes | 11 - Highly Flammable |
| Safety Description | 16 - Keep away from sources of ignition. |
| UN IDs | UN 3272 3/PG 2 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 10-21 |
| TSCA | No |
| HS Code | 29319090 |
| Hazard Class | 3.2 |
| Packing Group | III |
BIS(TRIMETHYLSILYL) MALONATE - Reference Information
| Preparation | Bis (trimethylsilane) maleate is made of maleic acid and trimethylchlorosilane The organic reaction is prepared. Using maleic acid and trimethylchlorosilane as starting materials, the target compound bis (trimethylsilane) maleate was prepared by nucleophilic reaction under alkaline conditions. The synthesis reaction formula of bis (trimethylsilane) maleate is as follows: experimental operation: under the protection of nitrogen, sodium hydride and anhydrous benzene solvent are added into a 250ml four-mouth bottle, under room temperature stirring, the anhydrous benzene solution of maleic acid is slowly added dropwise, the nitrogen protection state is maintained, the temperature is gradually increased, the temperature is maintained at 35 ℃, the dropwise addition is completed and stirred for 1 hour, then the anhydrous benzene solution of trimethylchlorosilane is dropwise, and the temperature is, after dropping, continue stirring for 1 hour, heat the mixture to 65 ℃, and detect the reaction progress by thin layer chromatography. At the end of the reaction, the reaction liquid is cooled to room temperature, filtered, the filter cake is washed with anhydrous benzene, the benzene solution is combined, concentrated, and the benzene is evaporated and purified by column chromatography (with petroleum ether: ethyl acetate = 30:1) to obtain a colorless liquid maleic acid Bis (trimethylsilane) ester. |
Last Update：2024-04-10 22:29:15
