Trisiloxane, octamethyl-

• Formula: C₈H₂₄O₂Si₃
• Molecular weight: 236.5315
• IUPAC Standard InChI: InChI=1S/C8H24O2Si3/c1-11(2,3)9-13(7,8)10-12(4,5)6/h1-8H3 Copy

  
• IUPAC Standard InChIKey: CXQXSVUQTKDNFP-UHFFFAOYSA-N Copy
• CAS Registry Number: 107-51-7
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Octamethyltrisiloxane; Silane, dimethylbis(trimethylsiloxy)-; 1,1,1,3,3,5,5,5-Octamethyltrisiloxane; [(CH3)3SiO]2Si(CH3)2; Dimethylbis(trimethylsiloxy)silane; CO9816; O9816
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Phase change data
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Gas Chromatography
  • References
  • Notes
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
• Options:
  • Switch to calorie-based units

Data at NIST subscription sites:

• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.

Phase change data

Go To: Top, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Gas phase ion energetics data

Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

Appearance energy determinations

IR Spectrum

Go To: Top, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), Gas Chromatography, References, Notes

Data compiled by: Coblentz Society, Inc.

• Not specified, most likely a prism, grating, or hybrid spectrometer.; (NO SPECTRUM, ONLY SCANNED IMAGE IS AVAILABLE)
• SOLUTION (5% IN CCl4 FOR 3800-1275, 2% IN CS2 FOR 1275-608, AND 5% IN CCl4 FOR 608-220 CM^-1) $$ PURITY MORE THAN 99%; PERKIN-ELMER 521 (GRATING); DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 2 cm^-1 resolution

Mass spectrum (electron ionization)

Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, Gas Chromatography, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.

For Zoom

1.) Enter the desired X axis range (e.g., 100, 200)

2.) Check here for automatic Y scaling

3.) Press here to zoom

Additional Data

Gas Chromatography

Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Normal alkane RI, non-polar column, custom temperature program

View large format table.

References

Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Flaningam, 1986
Flaningam, Ora L., Vapor pressures of poly(dimethylsiloxane) oligomers, J. Chem. Eng. Data, 1986, 31, 3, 266-272, https://doi.org/10.1021/je00045a002 . [all data]

Skorokhodov, Ditsent, et al., 1971
Skorokhodov, I.I.; Ditsent, V.E.; Teret'eva, N.A.; Zolotarev, M.N., Russ. J. Phys. Chem., 1971, 45, 6, 902. [all data]

Ermakov, Kirichenko, et al., 1982
Ermakov, A.I.; Kirichenko, E.A.; Pimkin, N.I.; Chizhov, Y.V.; Kleimenov, V.I., Photoelectronic spectra and electronic structure of organotri- and organotetrasiloxanes of linear and cyclic structure, Zh. Strukt. Khim., 1982, 23, 61. [all data]

Borossay, Csakvari, et al., 1971
Borossay, J.; Csakvari, B.; Szepes, L., Determination of bond energies of organic silicon compounds on the basis of appearance potentials, Int. J. Mass Spectrom. Ion Phys., 1971, 7, 47. [all data]

Kazuyoshi, Seiichi, et al., 2000
Kazuyoshi, N.; Seiichi, Y.; Kazuo, K.; Katsumi, I.; Okihiko, S., Polymer analysis by improved pyrolysis gas chromatography hyphenated with four specific detectors, J. Soc. Cosmet. Chem. Jpn., 2000, 34, 2, 142-151, https://doi.org/10.5107/sccj.34.142 . [all data]

Notes

Go To: Top, Phase change data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References

• Symbols used in this document:
  

  AE	Appearance energy
  ΔvapH	Enthalpy of vaporization

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
• The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
• Customer support for NIST Standard Reference Data products.