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Cas Database |
| Name |
Bis(trimethylsiloxy)methylsilane |
EINECS | 217-496-1 |
| CAS No. | 1873-88-7 | Density | 0.819 g/cm3 |
| PSA | 18.46000 | LogP | 2.53970 |
| Solubility | Miscible with acetone, ethanol, diethyl ether. Insoluble in water. | Melting Point |
<0 °C |
| Formula | C7H22O2Si3 | Boiling Point | 163.8 °C at 760 mmHg |
| Molecular Weight | 222.507 | Flash Point | 52.8 °C |
| Transport Information | UN 1993 3/PG 2 | Appearance | Colourless liquid |
| Safety | 26-36 | Risk Codes | 10-36/37/38 |
| Molecular Structure |
|
Hazard Symbols |
 Xi
|
| Synonyms |
1,1,1,3,5,5,5-Heptamethylsiloxane;1,1,1,3,5,5,5-Heptamethyltrisiloxane;2,2,4,6,6-Pentamethyl-3,5-dioxa-2,4,6-trisilaheptane;Bis(trimethylsilyloxy)methylsilane;Heptamethylhydrotrisiloxane;Methylbis(trimethylsiloxy)silane;Methylbis(trimethylsilyloxy)silane;SIB 1844;Di(trimethylsiloxy)methylsilane; |
Article Data | 18 |
Bis(trimethylsiloxy)methylsilane Synthetic route
- 75-54-7
Dichloromethylsilane
- 75-77-4
chloro-trimethyl-silane
- 1873-88-7
1,1,1,3,5,5,5-heptamethyltrisiloxan
| Conditions | Yield |
|---|---|
| With Methamphetamin In diethyl ether for 1h; | 68% |
| With water |
- 75-54-7
Dichloromethylsilane
- 18027-10-6
sodium trimethylsilanolate
- 1873-88-7
1,1,1,3,5,5,5-heptamethyltrisiloxan
| Conditions | Yield |
|---|---|
| In diethyl ether for 10h; Heating; | 59% |
| Conditions | Yield |
|---|---|
| With pyridine In hexane at -30 - 20℃; for 16h; | 34% |
- 99532-16-8
bis(trimethylsiloxy)(trimethylsilyl)methylsilane
A
- 1873-88-7
1,1,1,3,5,5,5-heptamethyltrisiloxan
B
- 107-51-7
Octamethyltrisiloxane
| Conditions | Yield |
|---|---|
| at 850℃; | A 14% B 10% |
| Conditions | Yield |
|---|---|
| In hexane |
- 75-54-7
Dichloromethylsilane
- 75-77-4
chloro-trimethyl-silane
A
- 1873-88-7
1,1,1,3,5,5,5-heptamethyltrisiloxan
B
- 16066-09-4
1,1,1,3,5,7,7,7-octamethyltetrasiloxane
C
- 2370-88-9
2,4,6,8-tetramethylcyclotetrasiloxane
D
- 17478-13-6
1,1,1,3,5,7,9,9,9-nonamethyl-pentasiloxane
E
- 6166-86-5
1,3,5,7,9-pentamethylcyclopentasiloxane
F
- 17998-54-8
polymethylhydrosiloxane
| Conditions | Yield |
|---|---|
| With water In toluene at 20℃; for 27h; Product distribution; hydrolytic copolycondensation depending on final concentration of hydrochloric acid; other dialkyldichlorosilanes; | A n/a B 6 % Chromat. C 4 % Chromat. D 3.5 % Chromat. E 3 % Chromat. F 2.0 % Chromat. |
- 75-54-7
Dichloromethylsilane
- 75-77-4
chloro-trimethyl-silane
- 1873-88-7
1,1,1,3,5,5,5-heptamethyltrisiloxan
| Conditions | Yield |
|---|---|
| With Methamphetamin In diethyl ether for 1h; | 68% |
| With water |
- 75-54-7
Dichloromethylsilane
- 18027-10-6
sodium trimethylsilanolate
- 1873-88-7
1,1,1,3,5,5,5-heptamethyltrisiloxan
| Conditions | Yield |
|---|---|
| In diethyl ether for 10h; Heating; | 59% |
| Conditions | Yield |
|---|---|
| With pyridine In hexane at -30 - 20℃; for 16h; | 34% |
Bis(trimethylsiloxy)methylsilane Specification
The Trisiloxane,1,1,1,3,5,5,5-heptamethyl- with CAS registry number of 1873-88-7 is also known as 1,1,1,3,5,5,5-Heptamethyltrisiloxane. The IUPAC name is Methyl-bis(trimethylsilyloxy)silicon. It belongs to product categories of Industrial/Fine Chemicals; Si (Classes of Silicon Compounds); Siloxanes; Si-O Compounds; Organometallic Reagents; Organosilicon. Its EINECS registry number is 217-496-1. In addition, the formula is C7H22O2Si3 and the molecular weight is 222.51. This chemical is a colourless liquid and should be stored in sealed containers in cool, dry place and away from oxidizing agents.
Physical properties about Trisiloxane,1,1,1,3,5,5,5-heptamethyl- are: (1)ACD/LogP: 5.32; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 5.32; (4)ACD/LogD (pH 7.4): 5.32; (5)ACD/BCF (pH 5.5): 6517.53; (6)ACD/BCF (pH 7.4): 6517.53; (7)ACD/KOC (pH 5.5): 18694.43; (8)ACD/KOC (pH 7.4): 18694.43; (9)#H bond acceptors: 2; (10)#Freely Rotating Bonds: 4; (11)Flash Point: 52.8 °C; (12)Enthalpy of Vaporization: 38.38 kJ/mol; (13)Boiling Point: 163.8 °C at 760 mmHg; (14)Vapour Pressure: 2.66 mmHg at 25 °C.
Preparation of Trisiloxane,1,1,1,3,5,5,5-heptamethyl-: it is prepared by reaction of dichloro-methyl-silane with chloro-trimethyl-silane. The reaction needs reagent ice and solvent diethyl ether for 1 hour. The yield is about 68%.
Uses of Trisiloxane,1,1,1,3,5,5,5-heptamethyl-: it can be used as surfactant, and widely used as additive of pesticide and paint. It is used to produce 3-(N-trimethylsilyl-3-aminopropyl)heptamethyltrisiloxane by reaction with allyl-trimethylsilanyl-amine. The reaction occurs with reagent H2PtCl6*6H2O and solvent tetrahydrofuran at 120-145 °C. The yield is about 54%.
When you are using this chemical, please be cautious about it. As a chemical, it is irritating to eyes, respiratory system and skin. Besides, it is flammable. During using it, wear suitable protective clothing. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
You can still convert the following datas into molecular structure:
1. Canonical SMILES: C[Si](O[Si](C)(C)C)O[Si](C)(C)C
2. InChI: InChI=1S/C7H21O2Si3/c1-10(8-11(2,3)4)9-12(5,6)7/h1-7H3
3. InChIKey: SWGZAKPJNWCPRY-UHFFFAOYSA-N
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