(Trifluoromethyl)acetylene
- Formula: C3HF3
- Molecular weight: 94.0352
- IUPAC Standard InChI: InChI=1S/C3HF3/c1-2-3(4,5)6/h1H
- IUPAC Standard InChIKey: PRDFNJUWGIQQBW-UHFFFAOYSA-N
- CAS Registry Number: 661-54-1
- 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: 1-Propyne, 3,3,3-trifluoro-; Propyne, 3,3,3-trifluoro-; 1,1,1-Trifluoropropyne; 3,3,3-Trifluoro-1-propyne; 3,3,3-Trifluoropropyne; CF3C≡CH
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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
AC - William E. Acree, Jr., James S. Chickos
Reduced pressure boiling point
| Tboil (K) | Pressure (atm) | Reference | Comment |
|---|---|---|---|
| 225. | 0.928 | Farchan Laboratories, 1990 | BS |
Enthalpy of vaporization
| ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 5.14 | 198. | A | Stephenson and Malanowski, 1987 | Based on data from 138. to 213. K.; AC |
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
C3F3- + =
By formula: C3F3- + H+ = C3HF3
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 355.1 ± 2.1 | kcal/mol | G+TS | Taft and Topsom, 1987 | gas phase; value altered from reference due to change in acidity scale |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 347.4 ± 2.0 | kcal/mol | IMRE | Taft and Topsom, 1987 | gas phase; value altered from reference due to change in acidity scale |
Gas phase ion energetics data
Go To: Top, Phase change data, Reaction thermochemistry data, 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:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 11.96 ± 0.02 | PE | Bieri, Heilbronner, et al., 1979 | LLK |
| 11.83 | PE | Cullen, Frost, et al., 1972 | LLK |
De-protonation reactions
C3F3- + =
By formula: C3F3- + H+ = C3HF3
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 355.1 ± 2.1 | kcal/mol | G+TS | Taft and Topsom, 1987 | gas phase; value altered from reference due to change in acidity scale; B |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 347.4 ± 2.0 | kcal/mol | IMRE | Taft and Topsom, 1987 | gas phase; value altered from reference due to change in acidity scale; B |
References
Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, 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]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Taft and Topsom, 1987
Taft, R.W.; Topsom, R.D.,
The Nature and Analysis of Substituent Effects,
Prog. Phys. Org. Chem., 1987, 16, 1. [all data]
Bieri, Heilbronner, et al., 1979
Bieri, G.; Heilbronner, E.; Hornung, V.; Kloster-Jensen, E.; Maier, J.P.; Thommen, F.; von Niessen, W.,
Electronic states of substituted haloacetylene and cyanoacetylene radical cations,
Chem. Phys., 1979, 36, 1. [all data]
Cullen, Frost, et al., 1972
Cullen, W.R.; Frost, D.C.; Leeder, W.R.,
The ultraviolet and photoelectron spectra of some unsaturated fluorocarbon derivatives,
J. Fluorine Chem., 1972, 1, 227. [all data]
Notes
Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
Tboil Boiling point 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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