556-67-2

Octamethylcyclotetrasiloxane(556-67-2) MS

Product NameOctamethylcyclotetrasiloxane

CAS 556-67-2

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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Octamethylcyclotetrasiloxane(556-67-2) MS
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

parameter in CDCl3

in CDCl3

Octamethylcyclotetrasiloxane(556-67-2) MS

¹H NMR	300 MHz
C₈ H₂₄ O₄ Si₄	0.05 ml : 0.5 ml CDCl₃
octamethylcyclotetrasiloxane

    Parameter     ppm  Hz

      D(A)         0.091
     
     J(A,Si-29) = 3.6 Hz.

     Hz     ppm     Int.

     27.30   0.091   1000

in CDCl3

CCl4 solution

liquid film

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