Hexamethyldisilazane
- Formula: C6H19NSi2
- Molecular weight: 161.3928
- IUPAC Standard InChI: InChI=1S/C6H19NSi2/c1-8(2,3)7-9(4,5)6/h7H,1-6H3
- IUPAC Standard InChIKey: FFUAGWLWBBFQJT-UHFFFAOYSA-N
- CAS Registry Number: 999-97-3
- Chemical structure:
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- Other names: Silanamine, 1,1,1-trimethyl-N-(trimethylsilyl)-; Disilazane, 1,1,1,3,3,3-hexamethyl-; Bis(trimethylsilyl)amine; 1,1,1,3,3,3-Hexamethyldisilazane; ((CH3)3Si)2NH; HMDS; OAP; Trimethyl-N-(trimethylsilyl)silanamine; 1,1,1-Trimethyl-N-(trimethylsilyl)silanamine; NSC 93895; SZ 6079; TSL 8802
- Information on this page:
- Other data available:
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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:
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
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tboil | 399. | K | N/A | Farchan Laboratories, 1990 | BS |
| Tboil | 399. | K | N/A | PCR Inc., 1990 | BS |
| Tboil | 397.2 | K | N/A | Myers and Clever, 1969 | Uncertainty assigned by TRC = 0.6 K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔvapH° | 10.1 ± 0.2 | kcal/mol | C | Voronkov, Klyuchnikov, et al., 1991 | AC |
Enthalpy of vaporization
| ΔvapH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 8.60 | 344. | Ditsent, Skorokhodov, et al., 1972 | Based on data from 294. to 395. K.; AC |
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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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. 4835 |
| Date | 1966 |
| Name(s) | N,N-bis(trimethylsilyl)amine trimethyl-N-(trimethylsilyl)silanamine |
| State | SOLUTION (10% IN CCl4 FOR 3800-1300, 10% IN CS2 FOR 1300-650, 10% IN CCl4 FOR 650-250 CM-1) VERSUS SOLVENT |
| Instrument | PERKIN-ELMER 521 (GRATING) |
| Instrument parameters | FILTERS AT 3150, 2500, 2000, 1150, 700, 410; GRATING CHANGES AT 2000, 630 CM-1 |
| Path length | 0.011, 0.011, AND 0.011 CM (CsBr CELL) |
| Resolution | 4 |
| Sampling procedure | TRANSMISSION |
| Data processing | DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS) |
References
Go To: Top, Phase change data, IR Spectrum, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Farchan Laboratories, 1990
Farchan Laboratories,
Research Chemicals Catalog, Farchan Laboratories, Gainesville, FL, 1990, 91. [all data]
PCR Inc., 1990
PCR Inc.,
Research Chemicals Catalog 1990-1991, PCR Inc., Gainesville, FL, 1990, 1. [all data]
Myers and Clever, 1969
Myers, R.S.; Clever, H.L.,
Surface Tension of Octamethylcyclotetrasiloxane and Hexamethyldisilazane and Their Solutions with Carbon Tetrachloride and n-Hexadecane,
J. Chem. Eng. Data, 1969, 14, 161-164. [all data]
Voronkov, Klyuchnikov, et al., 1991
Voronkov, M.G.; Klyuchnikov, V.A.; Marenkova, L.I.; Danilova, T.F.; Shvets, G.N.; Tsvetnitskaya, S.I.; Khudobin, Yu.I.,
Thermochemistry of organosilicon compounds,
Journal of Organometallic Chemistry, 1991, 406, 1-2, 99-104, https://doi.org/10.1016/0022-328X(91)83175-4
. [all data]
Ditsent, Skorokhodov, et al., 1972
Ditsent, V.E.; Skorokhodov, I.I.; Terent'eva, N.A.; Zolotareva, M.N.,
Zh. Fiz. Khim., 1972, 46, 7, 1888. [all data]
Notes
Go To: Top, Phase change data, IR Spectrum, References
- Symbols used in this document:
Tboil Boiling point ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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