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Cas Database |
| Name |
Potassium bis(trimethylsilyl)amide |
EINECS | 424-100-2 |
| CAS No. | 40949-94-8 | Density | 0.877 g/cm3 |
| PSA | 3.24000 | LogP | 2.42250 |
| Solubility | Reacts with water. | Melting Point |
194-195°C |
| Formula | C6H19KNSi2 | Boiling Point | 126 °C at 760 mmHg |
| Molecular Weight | 199.485 | Flash Point | 30 °C |
| Transport Information | UN 3263 8/PG 3 | Appearance | Colorless to amber solution |
| Safety | 26-36/37/39-45-62-43-46-16 | Risk Codes | 14-34-67-65-63-48/20-11 |
| Molecular Structure |
|
Hazard Symbols |
 C,  F
|
| Synonyms |
Potassium,[bis(trimethylsilyl)amino]- (7CI);Silanamine, 1,1,1-trimethyl-N-(trimethylsilyl)-,potassium salt (9CI);Hexamethyldisilazane potassium salt;KHMDS;N,N-Bis(trimethylsilyl)amine potassium salt;Potassiumbis(trimethylsilyl)amide;Potassium hexamethyldisilazamide;Potassiumhexamethyldisilazane;Potassium hexamethyldisilazide;Potassiumhexamethyldisilyl azide; |
Article Data | 9 |
Potassium bis(trimethylsilyl)amide Synthetic route
| Conditions | Yield |
|---|---|
| With potassium tert-butylate In benzene at 20℃; | 79% |
- 40949-94-8
potassium hexamethylsilazane
| Conditions | Yield |
|---|---|
| With potassium In diethyl ether at 25℃; for 1h; | 100 % Spectr. |
- 999-97-3
1,1,1,3,3,3-hexamethyl-disilazane
- 40949-94-8
potassium hexamethylsilazane
| Conditions | Yield |
|---|---|
| With potassium hydride In tetrahydrofuran for 3.25h; Irradiation; | |
| With n-Butyl chloride In tetrahydrofuran for 0.833333h; Yield given; | |
| With potassium hydride In diethyl ether at 20℃; for 0.5h; Inert atmosphere; |
- 72525-60-1
hexamethyldisilazan
- 40949-94-8
potassium hexamethylsilazane
| Conditions | Yield |
|---|---|
| With potassium hydride In tetrahydrofuran; hexane at 20℃; Inert atmosphere; |
| Conditions | Yield |
|---|---|
| In toluene at -78 - 20℃; | 100% |
| Conditions | Yield |
|---|---|
| In tetrahydrofuran for 0.25h; | 100% |
Potassium bis(trimethylsilyl)amide Specification
The systematic name of Potassium bis(trimethylsilyl)amide is potassium 1,1,1,3,3,3-hexamethyldisilazan-2-ide. With the CAS registry number 40949-94-8, it is also named as potassium hexamethyldisilazanide. The product's categories are Aliphatics; Analytical Chemistry; Si (Classes of Silicon Compounds); Silazanes; Silylation (GC Derivatizing Reagents); Si-N Compounds; Trimethylsilylation (GC Derivatizing Reagents); Classes of Metal Compounds; Silicon Compounds (for Synthesis); Synthetic Organic Chemistry; Typical Metal Compounds. It is colorless to amber solution which is sensitive to moisture. And it is a strong, non-nucleophilic base with an approximate pKa of 26 (compare to lithium diisopropylamide, at 36). Additionally, this chemical should be sealed in the container and stored at the temperature of 0 °C.
The other characteristics of Potassium bis(trimethylsilyl)amide can be summarized as: (1)ACD/LogP: 2.32; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -0.78; (4)ACD/LogD (pH 7.4): -0.78; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 1; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 2; (12)Polar Surface Area: 12.03 Å2; (13)Flash Point: 30 °C; (14)Enthalpy of Vaporization: 36.38 kJ/mol; (15)Boiling Point: 126 °C at 760 mmHg; (16)Vapour Pressure: 11.9 mmHg at 25°C.
When you are using this chemical, please be cautious about it as the following:
It is highly flammable and can cause burns, so people should keep it away from sources of ignition. And it can react violently with water. It also has possible risk of harm to the unborn child. What's more, this chemical may cause lung damage if swallowed and vapours may cause drowsiness and dizziness. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If you want to contact this product, you must wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label.
People can use the following data to convert to the molecule structure.
1. SMILES:[K+].[N-]([Si](C)(C)C)[Si](C)(C)C
2. InChI:InChI=1/C6H18NSi2.K/c1-8(2,3)7-9(4,5)6;/h1-6H3;/q-1;+1
3. InChIKey:IUBQJLUDMLPAGT-UHFFFAOYAI
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