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Cyclotrisiloxane, hexaethyl-

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Condensed phase thermochemistry data

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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

Quantity Value Units Method Reference Comment
liquid674.71J/mol*KN/ALebedev, Kulagina, et al., 1988 
liquid680.8J/mol*KN/ADzhafarov and Kuliev, 1985 
liquid674.4J/mol*KN/AKulagina and Lebedev, 1982 

Constant pressure heat capacity of liquid

Cp,liquid (J/mol*K) Temperature (K) Reference Comment
536.53300.Lebedev, Kulagina, et al., 1988T = 13.4 to 350 K.
581.4298.15Dzhafarov and Kuliev, 1985T = 5 to 300 K.
535.3298.15Kulagina and Lebedev, 1982T = 14 to 330 K.

Phase change data

Go To: Top, Condensed phase thermochemistry data, 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 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

Quantity Value Units Method Reference Comment
Ttriple283.41KN/ALebedev, Kulagina, et al., 1988, 2Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; TRC
Ttriple280.2KN/ADzhafarov and Kuliev, 1985, 2Crystal phase 1 phase; Uncertainty assigned by TRC = 0.1 K; TRC
Ttriple283.24KN/ALebedev, Kulagina, et al., 1984Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; TRC
Ttriple283.41KN/AKulagina and Lebedev, 1982, 2Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; TRC

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
57.9400.AStephenson and Malanowski, 1987Based on data from 385. - 524. K.; AC
58.7449.AStephenson and Malanowski, 1987Based on data from 434. - 516. K. See also Jenkins and Chambers, 1954.; AC

Antoine Equation Parameters

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

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Temperature (K) A B C Reference
434.7 - 516.03.508071276.-159.Jenkins and Chambers, 1954

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
11.42280.2Domalski and Hearing, 1990AC

Enthalpy of phase transition

DeltaHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
0.4700140. - 168.crystaline, IIIcrystaline, IILebedev, Kulagina, et al., 1988DH
11.7308242.4crystaline, IIcrystaline, ILebedev, Kulagina, et al., 1988DH
11.9403283.41crystaline, IliquidLebedev, Kulagina, et al., 1988DH
0.462160.crystaline, IIIcrystaline, IIDzhafarov and Kuliev, 1985DH
11.824242.3crystaline, IIcrystaline, IDzhafarov and Kuliev, 1985DH
11.424280.2crystaline, IliquidDzhafarov and Kuliev, 1985DH
0.470130.crystaline, IIIcrystaline, IIKulagina and Lebedev, 1982Glassy transition.; DH
11.730242.3crystaline, IIcrystaline, IKulagina and Lebedev, 1982DH
11.940283.41crystaline, IliquidKulagina and Lebedev, 1982DH

Entropy of phase transition

DeltaStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
2.08140. - 168.crystaline, IIIcrystaline, IILebedev, Kulagina, et al., 1988DH
48.39242.4crystaline, IIcrystaline, ILebedev, Kulagina, et al., 1988DH
42.07283.41crystaline, IliquidLebedev, Kulagina, et al., 1988DH
2.9160.crystaline, IIIcrystaline, IIDzhafarov and Kuliev, 1985DH
48.8242.3crystaline, IIcrystaline, IDzhafarov and Kuliev, 1985DH
40.9280.2crystaline, IliquidDzhafarov and Kuliev, 1985DH
3.61130.crystaline, IIIcrystaline, IIKulagina and Lebedev, 1982Glassy; DH
48.41242.3crystaline, IIcrystaline, IKulagina and Lebedev, 1982DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Mass spectrum (electron ionization)

Go To: Top, Condensed phase thermochemistry data, 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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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NIST MS number 73288

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References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Mass spectrum (electron ionization), 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, Mass spectrum (electron ionization), References