Cyclotrisiloxane, hexaethyl-

• Formula: C₁₂H₃₀O₃Si₃
• Molecular weight: 306.6213
• IUPAC Standard InChI: InChI=1S/C12H30O3Si3/c1-7-16(8-2)13-17(9-3,10-4)15-18(11-5,12-6)14-16/h7-12H2,1-6H3 Copy

  
• IUPAC Standard InChIKey: KMPBCFZCRNKXSA-UHFFFAOYSA-N Copy
• CAS Registry Number: 2031-79-0
• 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: Hexaethylcyclotrisiloxane; 1,1,3,3,5,5-Hexaethylcyclotrisiloxane
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • Mass spectrum (electron ionization)
• Options:
  • Switch to SI 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.

Condensed phase thermochemistry data

Go To: Top, Phase change data, 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: Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Phase change data

Go To: Top, Condensed phase thermochemistry data, 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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (atm)
    T = temperature (K)

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Enthalpy of fusion

Enthalpy of phase transition

Entropy of phase transition

References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes

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

Lebedev, Kulagina, et al., 1988
Lebedev, B.V.; Kulagina, T.G.; Smirnova, N.N., Thermodynamics of 4-methylcyclo-hexene, glycollide, and 1,1,3,3,5,5-hexaethylcyclotrisiloxane from 13.4 to 400 K, J. Chem. Thermodyn., 1988, 20, 1383-1396. [all data]

Dzhafarov and Kuliev, 1985
Dzhafarov, O.I.; Kuliev, A.M., Specific heat, phase transitions and thermodynamic properties of 1,1,3,3,5,5-hexaethylcyclotrisiloxane in the range 5-300 K, Zhur. Fiz. Khim., 1985, 59, 308-312. [all data]

Kulagina and Lebedev, 1982
Kulagina, T.G.; Lebedev, B.V., Thermodynamics of 2,2,4,4,6,6-hexaethylcyclotrisiloxane, its polymerization, and the resulting poly(diethylsiloxane) in the 0-330 K range, 1982, Termodin. [all data]

Lebedev, Kulagina, et al., 1988, 2
Lebedev, B.V.; Kulagina, T.G.; Smirnova, N.N., Thermodynamics of 4-methylcyclohexene, glycollide, and 1,1,3,3,5,5-hexaethylcyclotrisiloxane from 13.4 to 400 K, J. Chem. Thermodyn., 1988, 20, 1383. [all data]

Dzhafarov and Kuliev, 1985, 2
Dzhafarov, O.I.; Kuliev, A.M., Specific heat, phase transitions and thermodynamic properties of 1,1,3,3,5,5-hexaethylcyclotrisiloxane in the range 5-300 K, Zh. Fiz. Khim., 1985, 59, 308-12. [all data]

Lebedev, Kulagina, et al., 1984
Lebedev, B.V.; Kulagina, T.G.; Svistunov, V.S.; Papkov, V.S.; Zhdanov, A.A., Calorimetric study of 1,1,3,3,5,5-hexaethylcyclotrisiloxane and polydi-ethylsiloxane and the process of polymerization of 1,1,3,3,5,5-hexaethyl- cyclotrisiloxane in the range 13-330 K., Vysokomol. Soedin., Ser. A, 1984, 26, 2476-82. [all data]

Kulagina and Lebedev, 1982, 2
Kulagina, T.G.; Lebedev, B.V., Thermodynamics of 2,2,4,4,6,6-hexaethylcyclotrisiloxane, its polymerization and resulting poly(diethylsiloxane) in the 0-300 K range, Termodin. Org. Soedin., 1982, 1982, 18-26. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Jenkins and Chambers, 1954
Jenkins, Arthur C.; Chambers, George F., Vapor Pressures of Silicon Compounds, Ind. Eng. Chem., 1954, 46, 11, 2367-2369, https://doi.org/10.1021/ie50539a043 . [all data]

Domalski and Hearing, 1990
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase Volume II, J. Phys. Chem. Ref. Data, 1990, 19, 4, 881, https://doi.org/10.1063/1.555876 . [all data]

Notes

Go To: Top, Condensed phase thermochemistry data, Phase change data, References

• Symbols used in this document:
  

  Cp,liquid	Constant pressure heat capacity of liquid
  S°liquid	Entropy of liquid at standard conditions
  Ttriple	Triple point temperature
  ΔHtrs	Enthalpy of phase transition
  ΔStrs	Entropy of phase transition
  ΔfusH	Enthalpy of fusion
  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.