Ethane, pentafluoro-

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.


Reaction thermochemistry data

Go To: Top, 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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
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

Chlorine anion + Ethane, pentafluoro- = (Chlorine anion • Ethane, pentafluoro-)

By formula: Cl- + C2HF5 = (Cl- • C2HF5)

Quantity Value Units Method Reference Comment
Δr78.7 ± 8.4kJ/molIMRELarson and McMahon, 1984gas phase; B,M
Quantity Value Units Method Reference Comment
Δr97.5J/mol*KN/ALarson and McMahon, 1984, 2gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M
Quantity Value Units Method Reference Comment
Δr49.4 ± 8.4kJ/molIMRELarson and McMahon, 1984gas phase; B,M

Fluorine anion + Ethane, pentafluoro- = (Fluorine anion • Ethane, pentafluoro-)

By formula: F- + C2HF5 = (F- • C2HF5)

Quantity Value Units Method Reference Comment
Δr127. ± 8.4kJ/molIMRELarson and McMahon, 1983gas phase; B,M
Quantity Value Units Method Reference Comment
Δr111.J/mol*KN/ALarson and McMahon, 1983gas phase; switching reaction(F-)H2O, Entropy change calculated or estimated; Arshadi, Yamdagni, et al., 1970; M
Quantity Value Units Method Reference Comment
Δr94.1 ± 8.4kJ/molIMRELarson and McMahon, 1983gas phase; B,M

C2F5- + Hydrogen cation = Ethane, pentafluoro-

By formula: C2F5- + H+ = C2HF5

Quantity Value Units Method Reference Comment
Δr1567. ± 14.kJ/molG+TSSullivan and Beauchamp, 1976gas phase; Between tBuOH and HF; value altered from reference due to change in acidity scale; B
Quantity Value Units Method Reference Comment
Δr1535. ± 13.kJ/molIMRBSullivan and Beauchamp, 1976gas phase; Between tBuOH and HF; value altered from reference due to change in acidity scale; B

Ethane, 2-chloro-1,1,1,2-tetrafluoro- + hydrogen fluoride = Ethane, pentafluoro- + Hydrogen chloride

By formula: C2HClF4 + HF = C2HF5 + HCl

Quantity Value Units Method Reference Comment
Δr-10.5 ± 6.3kJ/molKinCoulson, 1993gas phase; solvent: On solid catalyst; ALS

Gas phase ion energetics data

Go To: Top, 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 by: John E. Bartmess

De-protonation reactions

C2F5- + Hydrogen cation = Ethane, pentafluoro-

By formula: C2F5- + H+ = C2HF5

Quantity Value Units Method Reference Comment
Δr1567. ± 14.kJ/molG+TSSullivan and Beauchamp, 1976gas phase; Between tBuOH and HF; value altered from reference due to change in acidity scale
Quantity Value Units Method Reference Comment
Δr1535. ± 13.kJ/molIMRBSullivan and Beauchamp, 1976gas phase; Between tBuOH and HF; value altered from reference due to change in acidity scale

References

Go To: Top, 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.

Larson and McMahon, 1984
Larson, J.W.; McMahon, T.B., Hydrogen bonding in gas phase anions. An experimental investigation of the interaction between chloride ion and bronsted acids from ICR chloride exchange equilibria, J. Am. Chem. Soc., 1984, 106, 517. [all data]

Larson and McMahon, 1984, 2
Larson, J.W.; McMahon, T.B., Gas phase negative ion chemistry of alkylchloroformates, Can. J. Chem., 1984, 62, 675. [all data]

French, Ikuta, et al., 1982
French, M.A.; Ikuta, S.; Kebarle, P., Hydrogen bonding of O-H and C-H hydrogen donors to Cl-. Results from mass spectrometric measurement of the ion-molecule equilibria RH + Cl- = RHCl-, Can. J. Chem., 1982, 60, 1907. [all data]

Larson and McMahon, 1983
Larson, J.W.; McMahon, T.B., Strong hydrogen bonding in gas-phase anions. An ion cyclotron resonance determination of fluoride binding energetics to bronsted acids from gas-phase fluoride exchange equilibria measurements, J. Am. Chem. Soc., 1983, 105, 2944. [all data]

Arshadi, Yamdagni, et al., 1970
Arshadi, M.; Yamdagni, R.; Kebarle, P., Hydration of Halide Negative Ions in the Gas Phase. II. Comparison of Hydration Energies for the Alkali Positive and Halide Negative Ions, J. Phys. Chem., 1970, 74, 7, 1475, https://doi.org/10.1021/j100702a014 . [all data]

Sullivan and Beauchamp, 1976
Sullivan, S.A.; Beauchamp, J.L., Competition between proton transfer and elimination in the reactions of strong bases with fluoroethanes in the gas phase. Influence of base strength on reactivity, J. Am. Chem. Soc., 1976, 98, 1160. [all data]

Coulson, 1993
Coulson, D.R., Kinetics of the fluorination/chlorination of 1-chloro-1,2,2,2-tetrafluoroethane, J. Catal., 1993, 142, 289-302. [all data]


Notes

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References