Octamethylcyclotetrasiloxane(556-67-2) IR2
Molecular FormulaC8H24O4Si4
Molecular Weight296.62
InChIInChI=1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3
InChIKey HMMGMWAXVFQUOA-UHFFFAOYSA-N
SmilesC[Si]1(O[Si](O[Si](C)(C)O[Si](C)(C)O1)(C)C)C
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![](https://www.chemicalbook.com/Spectrum/556-67-2_MS.gif)
Mass
MS-IW-1345
octamethylcyclotetrasiloxane
C8H24O4Si4 (Mass of molecular ion: 296)
Source Temperature: 240 °C
Sample Temperature: 150 °C
Reservoir, 75 eV
133.0 1.7
191.0 2.7
193.0 1.8
205.0 1.4
207.0 2.8
249.0 5.8
250.0 1.6
251.0 2.2
265.0 11.3
266.0 3.1
267.0 2.6
281.0 100.0
282.0 28.4
283.0 18.0
284.0 3.7
285.0 1.1
in CDCl3
parameter in CDCl3
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![](https://www.chemicalbook.com/Spectrum/556-67-2_1HNMR_2.jpg)
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![](https://www.chemicalbook.com/Spectrum/556-67-2_1HNMR.gif)
1H NMR |
300 MHz |
C8 H24 O4 Si4
|
0.05 ml : 0.5 ml CDCl3
|
octamethylcyclotetrasiloxane
|
![ChemicalStructure](Spectrum/556-67-2_1HNMR_2_0.jpg) |
Parameter ppm Hz
D(A) 0.091
J(A,Si-29) = 3.6 Hz.
|
Hz ppm Int.
27.30 0.091 1000