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Octaphenylcyclotetrasiloxane

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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
solid,1 bar1044.J/mol*KN/AKuliev, Dzhafarov, et al., 1982 

Constant pressure heat capacity of solid

Cp,solid (J/mol*K) Temperature (K) Reference Comment
932.5298.15Kuliev, Dzhafarov, et al., 1982T = 12 to 300 K.

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

Enthalpy of fusion

DeltafusH (kJ/mol) Temperature (K) Method Reference
1.26473.2DSCMatukhina, Shchegolikhina, et al., 2001
1.13475.N/ALebedev, Smirnova, et al., 2000
1.95478.1N/ASmith, 1979

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 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. 5510
Date 1964/12/05
Name(s) 2,2,4,4,6,6,8,8-octaphenyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane
State SOLUTION (5% IN CCl4 FOR 3800-1275, 2% IN CS2 FOR 1275-600, AND 5% IN CCl4 FOR 600-220 CM-1)
Instrument PERKIN-ELMER 521 (GRATING)
Instrument parameters FILTERS AT 3150, 2500, 2000, 1150, 700, 410. GRATING CHANGES: 2000, 630 CM-1
Path length 0.011 CM, 0.011 CM, AND 0.021 CM
Resolution 2
Sampling procedure TRANSMISSION
Data processing DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS)
Melting point 202 C

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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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 Japan AIST/NIMC Database- Spectrum MS-IW- 706
NIST MS number 239406

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


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

Normal alkane RI, non-polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillaryMethyl Silicone4483.Fujimoto, Ohtani, et al., 199025. m/0.25 mm/0.1 «mu»m, He, 5. K/min; Tstart: 40. C; Tend: 350. C

References

Go To: Top, Condensed phase thermochemistry data, 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.

Kuliev, Dzhafarov, et al., 1982
Kuliev, A.M.; Dzhafarov, O.I.; Karasharli, K.A.; Kostryukov, V.N., Heat capacity and thermodynamic functions of 1,1,3,3,5,5-hexaphenyl-7, 7-dimethylcyclotetrasiloxane and octaphenylcyclotetrasiloxane, 1982, Azerb. [all data]

Matukhina, Shchegolikhina, et al., 2001
Matukhina, Elena V.; Shchegolikhina, Olga I.; Makarova, Natalia N.; Pozdniakova, Yulia A.; Katsoulis, Dimitris E.; Godovsky, Yuli K., New mesomorphic organocyclosiloxanes I. Thermal behaviour and mesophase structure of organocyclotetrasiloxanes, Liquid Crystals, 2001, 28, 6, 869-879, https://doi.org/10.1080/02678290110039930 . [all data]

Lebedev, Smirnova, et al., 2000
Lebedev, B.V.; Smirnova, N.N.; Papkov, V.S.; Buzin, M.I.; Dubovik, I.I., Thermodynamics of poly(diphenylsiloxane) in the temperature region of 0-620 K, Poly. Sci., Ser. A, 2000, 42, 10, 1111. [all data]

Smith, 1979
Smith, George W., Phase behavior and nucleation kinetics of Octaphenylcyclotetrasiloxane, Phase Transitions, 1979, 1, 2, 107-129, https://doi.org/10.1080/01411597908213195 . [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]


Notes

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