Ethyne, 1-trimethylsilyl-
- Formula: C2H4Si
- Molecular weight: 56.1387
- IUPAC Standard InChIKey: CWMFRHBXRUITQE-UHFFFAOYSA-N
- CAS Registry Number: 1066-27-9
- 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.
Data compiled by: William E. Acree, Jr., James S. Chickos
Enthalpy of vaporization
ΔvapH (kJ/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
22.0 | 233. | Ebsworth and Frankiss, 1963 | Based on data from 215. to 251. K. |
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
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
C2H3Si- + =
By formula: C2H3Si- + H+ = C2H4Si
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1538. ± 9.6 | kJ/mol | G+TS | Gal, Decouzon, et al., 2001 | gas phase |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1507. ± 8.4 | kJ/mol | IMRE | Gal, Decouzon, et al., 2001 | gas phase |
Gas phase ion energetics 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:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
10.73 | PE | Ensslin, Bock, et al., 1974 | Vertical value; LLK |
De-protonation reactions
C2H3Si- + =
By formula: C2H3Si- + H+ = C2H4Si
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1538. ± 9.6 | kJ/mol | G+TS | Gal, Decouzon, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1507. ± 8.4 | kJ/mol | IMRE | Gal, Decouzon, et al., 2001 | gas phase; B |
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.
Ebsworth and Frankiss, 1963
Ebsworth, E.A.V.; Frankiss, S.G.,
104. The preparation and properties of silylacetylene, and the structures of silyl cyanides,
J. Chem. Soc., 1963, 661, https://doi.org/10.1039/jr9630000661
. [all data]
Gal, Decouzon, et al., 2001
Gal, J.F.; Decouzon, M.; Maria, P.C.; Gonzalez, A.I.; Mo, O.; Yanez, M.; El Chaouch, S.; Guillemin, J.C.,
Acidity trends in alpha,beta-unsaturated alkanes, silanes, germanes, and stannanes,
J. Am. Chem. Soc., 2001, 123, 26, 6353-6359, https://doi.org/10.1021/ja004079j
. [all data]
Ensslin, Bock, et al., 1974
Ensslin, W.; Bock, H.; Becker, G.,
Photoelectron spectra and molecular properties. XXX. π interactions in H3Si- H3C-substituted acetylenes,
J. Am. Chem. Soc., 1974, 96, 2757. [all data]
Notes
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- Symbols used in this document:
ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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