Disilane
- Formula: H6Si2
- Molecular weight: 62.2186
- IUPAC Standard InChI: InChI=1S/H6Si2/c1-2/h1-2H3
- IUPAC Standard InChIKey: PZPGRFITIJYNEJ-UHFFFAOYSA-N
- CAS Registry Number: 1590-87-0
- Chemical structure:
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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.
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
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| Temperature (K) | A | B | C | Reference | Comment |
|---|---|---|---|---|---|
| 158.3 - 258.9 | 3.83601 | 905.406 | -23.4 | Stull, 1947 | Coefficents calculated by NIST from author's data. |
Reaction 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: John E. Bartmess
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Individual Reactions
H5Si2- + =
By formula: H5Si2- + H+ = H6Si2
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | <313.5 ± 2.8 | kcal/mol | Acid | Krishnakumar and Srivastava, 1991 | gas phase; From Si2H6, AP = 0.0 eV/Data for SiH4 plus a-Si effects imply ΔHacid ca. 360. G3MP2B3 calculations give dHacid=360 kcal/mol |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | <304.7 ± 3.4 | kcal/mol | H-TS | Krishnakumar and Srivastava, 1991 | gas phase; From Si2H6, AP = 0.0 eV/Data for SiH4 plus a-Si effects imply ΔHacid ca. 360. G3MP2B3 calculations give dHacid=360 kcal/mol |
References
Go To: Top, Phase change data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
. [all data]
Krishnakumar and Srivastava, 1991
Krishnakumar, E.; Srivastava, S.K.,
Dissociative Electron Attachment of Electrons with Si2H6,
Int. J. Mass Spectrom. Ion Proc., 1991, 103, 2-3, 107, https://doi.org/10.1016/0168-1176(91)80082-X
. [all data]
Notes
Go To: Top, Phase change data, Reaction thermochemistry data, References
- Symbols used in this document:
ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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