Disiloxane, hexamethyl-
- Formula: C6H18OSi2
- Molecular weight: 162.3775
- IUPAC Standard InChIKey: UQEAIHBTYFGYIE-UHFFFAOYSA-N
- CAS Registry Number: 107-46-0
- 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: Bis(trimethylsilyl) ether; Bis(trimethylsilyl) oxide; Fluka AG; Hexamethyldisiloxane; ((CH3)3Si)2O; Oxybis(trimethylsilane); Silane, oxybis(trimethyl)-; Dow corning 200/0.65; H7310; HMDSO; Belsil DM 0.65; Disiloxane, 1,1,1,3,3,3-hexamethyl-; KF 96L; NSC 43346; OS 10; SWS-F 221; DC 200 FLUID (Salt/Mix)
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- Options:
Data at NIST subscription sites:
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.
Phase change data
Go To: Top, IR Spectrum, 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:
BS - Robert L. Brown and Stephen E. Stein
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 |
---|---|---|---|---|---|
Tboil | 373. ± 2. | K | AVG | N/A | Average of 7 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 204.93 | K | N/A | Scott, Messerly, et al., 1961 | Uncertainty assigned by TRC = 0.02 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 518.7 | K | N/A | McLure and Dickinson, 1976 | Uncertainty assigned by TRC = 0.51 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 19.00 | atm | N/A | McLure and Dickinson, 1976 | Uncertainty assigned by TRC = 0.099 atm; for sample see E.Dickinson and I.A.McClure, 1974-234; TRC |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
8.82 | 315. | EB | Flaningam, 1986 | Based on data from 300. to 383. K.; AC |
7.91 | 327. | N/A | Ditsent, Skorokhodov, et al., 1971 | Based on data from 293. to 361. K.; AC |
8.6 | 324. | EB | Scott, Messerly, et al., 1961, 2 | Based on data from 309. to 411. K.; AC |
8.27 ± 0.02 | 332. | C | Scott, Messerly, et al., 1961, 2 | AC |
7.91 ± 0.02 | 351. | C | Scott, Messerly, et al., 1961, 2 | AC |
7.48 ± 0.02 | 373. | C | Scott, Messerly, et al., 1961, 2 | AC |
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.
Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
309.4 to 411.56 | 3.89628 | 1203.916 | -64.673 | Scott, Messerly, et al., 1961, 2 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
2.8489 | 204.93 | Dzhafarov and Kuliev, 1986 | DH |
2.84940 | 204.93 | Scott, Messerly, et al., 1961, 2 | DH |
2.849 | 204.9 | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
13.91 | 204.93 | Scott, Messerly, et al., 1961, 2 | DH |
IR Spectrum
Go To: Top, Phase change data, Mass spectrum (electron ionization), References, Notes
Data compiled by: Coblentz Society, Inc.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Mass spectrum (electron ionization)
Go To: Top, Phase change data, IR Spectrum, 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
Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.
Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
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 | D.HENNEBERG, MAX-PLANCK INSTITUTE, MULHEIM, WEST GERMANY |
NIST MS number | 61595 |
References
Go To: Top, Phase change data, IR Spectrum, 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.
Scott, Messerly, et al., 1961
Scott, D.W.; Messerly, J.F.; Todd, S.S.; Guthrie, G.B.; Hossenlopp, I.A.; Moore, R.T.; Osborn, A.G.; Berg, W.T.; McCullough, J.P.,
Hexamethyldisiloxane: chemical thermodynamic properties and internal rotation about the siloxane linkage,
J. Phys. Chem., 1961, 65, 1320-6. [all data]
McLure and Dickinson, 1976
McLure, I.A.; Dickinson, E.,
Vapor pressure of hexamethyldisiloxane near its critical point: corresponding-states principle for dimethylsiloxanes,
J. Chem. Thermodyn., 1976, 8, 93-5. [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]
Ditsent, Skorokhodov, et al., 1971
Ditsent, V.E.; Skorokhodov, I.I.; Terent'eva, N.A.; Zolotareva, M.N.,
Russ. J. Phys. Chem., 1971, 45, 6, 901. [all data]
Scott, Messerly, et al., 1961, 2
Scott, D.W.; Messerly, J.F.; Todd, S.S.; Guthrie, G.B.; Hossenlopp, I.A.; Moore, R.T.; Osborn, A.; Berg, W.T.; McCullough, J.P.,
Hexamethyldisiloxane: chemical thermodynamic properties and internal rotation about the siloxane linkage,
J. Phys. Chem., 1961, 65, 1320-1326. [all data]
Dzhafarov and Kuliev, 1986
Dzhafarov, O.I.; Kuliev, A.M.,
Heat capacity and thermodynamic properties of disiloxanes,
Dokl. Akad. Nauk. Azerb., 1986, SSR 42, 56-59. [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]
Notes
Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), References
- Symbols used in this document:
Pc Critical pressure Tboil Boiling point Tc Critical temperature Ttriple Triple point temperature ΔfusH Enthalpy of fusion ΔfusS Entropy 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.