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Cycloheptasiloxane, tetradecamethyl-

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Phase change 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 as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tfus238.KN/AAlvik and Dale, 1971Uncertainty assigned by TRC = 0.1 K; TRC

Enthalpy of vaporization

DeltavapH (kJ/mol) Temperature (K) Method Reference Comment
58.6374.AStephenson and Malanowski, 1987Based on data from 359. - 537. K.; AC
60.6446.EBFlaningam, 1986Based on data from 431. - 548. K.; AC

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Reference Comment
20.88237.7Alvik, Dale, et al., 1971AC

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:


IR Spectrum

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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: Coblentz Society, Inc.

Condensed Phase Spectrum

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IR spectrum
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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

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Owner Copyright (C) 1987 by the Coblentz Society
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin DOW CORNING CORP.
Source reference COBLENTZ NO. 5594
Date 1965/02/04
Name(s) 2,2,4,4,6,6,8,8,10,10,12,12,14,14-tetradecamethylcycloheptasiloxane
State SOLUTION (5% CCl4 FOR 3800-1300, 2% CS2 FOR 1300-620, AND 5% CCl4 FOR 620-210)
Instrument PERKIN-ELMER 521 (GRATING)
Instrument parameters FILTERS AT 3150, 2500, 2000, 1150, 700, 410. GRATING CHANGES: 2000, 630
Path length 0.011 CM, 0.011 CM, AND 0.020 CM
SPECTRAL FEATURE AT 1303 CM-1 IS AN ARTIFACT CAUSED BY A CHANGE IN SOLVENT
Resolution 2
Boiling point 154 C AT 20 mmHg

This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.


Mass spectrum (electron ionization)

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

Spectrum

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Mass spectrum
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Additional Data

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Due to licensing restrictions, this spectrum cannot be downloaded.

Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Chemical Concepts
NIST MS number 153820

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Gas Chromatography

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

Van Den Dool and Kratz RI, non-polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillaryUltra-11519.Richmond and Pombo-Villar, 199825. m/0.32 mm/0.52 «mu»m, He, 15. K/min, 320. C @ 10. min; Tstart: 35. C

Normal alkane RI, non-polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillarySP-21001516.Fischer and Kusch, 1993He, 40. C @ 3. min, 5. K/min; Column length: 30. m; Column diameter: 0.25 mm; Tend: 280. C
CapillaryMethyl Silicone1538.Fujimoto, Ohtani, et al., 199025. m/0.25 mm/0.1 «mu»m, He, 5. K/min; Tstart: 40. C; Tend: 350. C

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

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Column type Active phase I Reference Comment
CapillaryUltra-11526.Kazuyoshi, Seiichi, et al., 200030. m/0.25 mm/0.50 «mu»m; Program: 40 0C (5 min) 10 0C/min -> 200 0C 20 0C/min -> 320 0C (13 min)
CapillaryUltra-11526.Kazuyoshi, Seiichi, et al., 200030. m/0.25 mm/0.50 «mu»m; Program: 40 0C (5 min) 10 0C/min -> 200 0C 20 0C/min -> 320 0C (13 min)
CapillaryUltra-11527.Kazuyoshi, Seiichi, et al., 200030. m/0.25 mm/0.50 «mu»m; Program: 40 0C (5 min) 10 0C/min -> 200 0C 20 0C/min -> 320 0C (13 min)
CapillaryUltra-11531.Kazuyoshi, Seiichi, et al., 200030. m/0.25 mm/0.50 «mu»m; Program: 40 0C (5 min) 10 0C/min -> 200 0C 20 0C/min -> 320 0C (13 min)
CapillaryUltra-11537.Kazuyoshi, Seiichi, et al., 200030. m/0.25 mm/0.50 «mu»m; Program: 40 0C (5 min) 10 0C/min -> 200 0C 20 0C/min -> 320 0C (13 min)
CapillaryUltra-11538.Kazuyoshi, Seiichi, et al., 200030. m/0.25 mm/0.50 «mu»m; Program: 40 0C (5 min) 10 0C/min -> 200 0C 20 0C/min -> 320 0C (13 min)
CapillaryUltra-11518.Richmond and Pombo-Villar, 199825. m/0.32 mm/0.52 «mu»m, He; Program: not specified

References

Go To: Top, Phase change 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.

Alvik and Dale, 1971
Alvik, T.; Dale, J., On the Lack of Conformational Preferences for Cyclic Dimethylsiloxane Oligomers., Acta Chem. Scand., 1971, 25, 2131, https://doi.org/10.3891/acta.chem.scand.25-2131 . [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]

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]

Alvik, Dale, et al., 1971
Alvik, Thor; Dale, Johannes; Fernholt, L.; Hedberg, Kenneth; Schaumburg, Kjeld; Ehrenberg, L., On the Lack of Conformational Preferences for Cyclic Dimethylsiloxane Oligomers., Acta Chem. Scand., 1971, 25, 2131-2141, https://doi.org/10.3891/acta.chem.scand.25-2131 . [all data]

Richmond and Pombo-Villar, 1998
Richmond, R.; Pombo-Villar, E., Short communication. Use of persistent trace gas chromatography artifacts for the calculation of pseudo-Sadtler retention indices, J. Chromatogr. A, 1998, 811, 1-2, 241-245, https://doi.org/10.1016/S0021-9673(98)00285-4 . [all data]

Fischer and Kusch, 1993
Fischer, G.W.; Kusch, P., An Automated Curie-Point Pyrolysis-High Resolution Gas Chromatography System, LC-GC Int., 1993, 6, 12, 760-763. [all data]

Fujimoto, Ohtani, et al., 1990
Fujimoto, S.; Ohtani, H.; Yamagiwa, K.; Tsuge, S., Study on retention behavior of cyclic siloxanes by high resolution pyrolysis-gas chromatography with a fused silica capillary column, J. Hi. Res. Chromatogr., 1990, 13, 6, 397-404, https://doi.org/10.1002/jhrc.1240130603 . [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, IR Spectrum, Mass spectrum (electron ionization), Gas Chromatography, References