2,2,4,4,6,6-Hexamethyl-8,8-diphenyl-[1,3,5,7,2,4,6,8]cyclotetrasiloxane

• Formula: C₁₈H₂₈O₄Si₄
• Molecular weight: 420.7545
• IUPAC Standard InChI: InChI=1S/C18H28O4Si4/c1-23(2)19-24(3,4)21-26(22-25(5,6)20-23,17-13-9-7-10-14-17)18-15-11-8-12-16-18/h7-16H,1-6H3 Copy

  
• IUPAC Standard InChIKey: BOIFXPDTOHPTOD-UHFFFAOYSA-N Copy
• CAS Registry Number: 1693-44-3
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: 2,2,4,4,6,6-hexamethyl-8,8-diphenylcyclotetrasiloxane; 1,1,3,3,5,5-Hexamethyl-7,7-diphenylcyclotetrasiloxane
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• Information on this page:
  • Phase change data
  • Gas Chromatography
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
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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, Chris Muzny director
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of fusion

Entropy of fusion

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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References

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

Mekhtiev and Karasharli, 1981
Mekhtiev, S.A.; Karasharli, K.A., Analysis of the results of thermodynamic studies of a series of organosilicon compounds, Azerb. Khim. Zhur., 1981, (5), 85-88. [all data]

Mekhtiev, Karasharli, et al., 1975
Mekhtiev, S.A.; Karasharli, K.A.; Dzhafarov, O.I., The true heat capacity of 1,1,3,3,5,5-hexamethyl-7,7-diphenylcyclotetrasiloxane in the temperature range 13 to 320 K, Zhur. Fiz. Khim., 1975, 49, 259. [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [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

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• Symbols used in this document:
  

  Ttriple	Triple point temperature
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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