Trichloroacetic Acid
- Formula: C2HCl3O2
- Molecular weight: 163.387
- IUPAC Standard InChI: InChI=1S/C2HCl3O2/c3-2(4,5)1(6)7/h(H,6,7)
- IUPAC Standard InChIKey: YNJBWRMUSHSURL-UHFFFAOYSA-N
- CAS Registry Number: 76-03-9
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Acetic acid, trichloro-; Aceto-Caustin; Amchem Grass Killer; Trichloroethanoic acid; TCA; CCl3COOH; Acide trichloracetique; Acido tricloroacetico; Trichloorazijnzuur; Trichloracetic acid; Trichloressigsaeure; Konesta; Kyselina trichloroctova; UN 1839; TKhUK; TKhU; Acetic acid, 2,2,2-trichloro-; NSC 215204
- 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.
Gas phase thermochemistry data
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -103.65 | kcal/mol | Cm | Trifel, Smirnov, et al., 1992 |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics 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:
MS - José A. Martinho Simões
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
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
C14H10Cl6O4Ti (cr) + 2( • 4.40
) (solution) =
(cr) + 2
(cr)
By formula: C14H10Cl6O4Ti (cr) + 2(HCl • 4.40H2O) (solution) = C10H10Cl2Ti (cr) + 2C2HCl3O2 (cr)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 3.20 ± 0.62 | kcal/mol | RSC | Dias, Salema, et al., 1984 | Please also see Calhorda, Carrondo, et al., 1986.; MS |
+
=
+
By formula: C2Cl4O + H2O = C2HCl3O2 + HCl
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | -28.12 | kcal/mol | Cm | Pritchard and Skinner, 1950 | liquid phase; Heat of hydrolysis at 298 K; ALS |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry 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 evaluated by: Edward P. Hunter and Sharon G. Lias
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Proton affinity (review) | 184.0 | kcal/mol | N/A | Hunter and Lias, 1998 | |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 176.6 | kcal/mol | N/A | Hunter and Lias, 1998 |
References
Go To: Top, Gas phase thermochemistry 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.
Trifel, Smirnov, et al., 1992
Trifel, B.Yu.; Smirnov, V.V.; Gloriozov, I.P.; Kurbanov, N.I.; Mamedov, F.V.,
Mechanism of reaction between trichloroacetic acid and unsaturated ketones,
Vestn. Mosk. Univ. Ser. 2: Khim., 1992, 33, 547-550. [all data]
Dias, Salema, et al., 1984
Dias, A.R.; Salema, M.S.; Martinho Simões, J.A.,
Rev. Port. Quím., 1984, 26, 227. [all data]
Calhorda, Carrondo, et al., 1986
Calhorda, M.J.; Carrondo, M.A.A.F.C.T.; Dias, A.R.; Domingos, A.M.T.S.; Martinho Simões, J.A.; Teixeira, C.,
Organometallics, 1986, 5, 660. [all data]
Pritchard and Skinner, 1950
Pritchard, H.O.; Skinner, H.A.,
The heats of hydrolysis of the chloro-substituted acetyl chlorides,
J. Chem. Soc., 1950, 272-276. [all data]
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrH° Enthalpy of reaction at standard conditions - 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.