chromium difluoride
- Formula: CrF2
- Molecular weight: 89.9929
- CAS Registry Number: 10049-10-2
- Information on this page:
- Data at other public NIST sites:
- Options:
Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, Ion clustering 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
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
+ CrF2 = (
• CrF2)
By formula: F- + CrF2 = (F- • CrF2)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 86.3 ± 3.8 | kcal/mol | TDEq | Boltalina, Borshchevskii, et al., 1991 | gas phase; Data at 0 K. See also Pramann and Rademann, 1999; value altered from reference due to conversion from electron convention to ion convention |
| ΔrH° | 157.7 ± 7.7 | kcal/mol | Ther | Igolkina | gas phase; The derived values do not seem reasonable - JEB.; value altered from reference due to conversion from electron convention to ion convention |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, Ion clustering 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:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess
View reactions leading to CrF2+ (ion structure unspecified)
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 1.80 ± 0.29 | R-A | Boltalina, Borshchevskii, et al., 1991 | Data at 0 K. See also Pramann and Rademann, 1999; value altered from reference due to conversion from electron convention to ion convention; B |
| 1.50 ± 0.40 | EIAE | Flesch, White, et al., 1969 | From CrO2F2; B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 10.6 ± 0.3 | EI | Malkerova, Alikhanyan, et al., 1979 | LLK |
| 10.1 ± 0.3 | EI | Kent and Margrave, 1965 | RDSH |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| FCr+ | 14.7 ± 0.5 | F | EI | Malkerova, Alikhanyan, et al., 1979 | LLK |
Ion clustering 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: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.
Clustering reactions
+ CrF2 = (
• CrF2)
By formula: F- + CrF2 = (F- • CrF2)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 86.3 ± 3.8 | kcal/mol | TDEq | Boltalina, Borshchevskii, et al., 1991 | gas phase; Data at 0 K. See also Pramann and Rademann, 1999; value altered from reference due to conversion from electron convention to ion convention |
| ΔrH° | 157.7 ± 7.7 | kcal/mol | Ther | Igolkina | gas phase; The derived values do not seem reasonable - JEB.; value altered from reference due to conversion from electron convention to ion convention |
References
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Boltalina, Borshchevskii, et al., 1991
Boltalina, O.V.; Borshchevskii, A.Y.; Sidorov, L.N.,
Thermochemistry of Chromium Gaseous Fluorides and Their Negative Ions,
Zh. Fiz. Khim. SSSR, 1991, 65, 884. [all data]
Pramann and Rademann, 1999
Pramann, A.; Rademann, K.,
Mass-spectrometric study of formation and stability of manganese and manganese oxide cluster anions,
Int. J. Mass Spectrom., 1999, 187, 673-683, https://doi.org/10.1016/S1387-3806(98)14197-0
. [all data]
Igolkina
Igolkina, N.A.,
Negative Ion Molecule Reaction in Chromium Trifluoride Vapor, Dep. Doc. VINITI 7085-83 Pt 1 102. [all data]
Flesch, White, et al., 1969
Flesch, G.D.; White, R.M.; Svec, H.J.,
The Positive and Negative Ion Mass Spectra of Chromyl Chloride and Chromyl Fluoride,
Int. J. Mass Spectrom. Ion Phys., 1969, 3, 5, 239, https://doi.org/10.1016/0020-7381(69)80079-3
. [all data]
Malkerova, Alikhanyan, et al., 1979
Malkerova, I.P.; Alikhanyan, A.S.; Pervov, V.S.; Tripol'skaya, T.A.; Gorgoraki, V.I.; Malyusov, V.A.,
High-temperature investigations of chromium lower fluorides,
Russ. J. Inorg. Chem., 1979, 24, 1775. [all data]
Kent and Margrave, 1965
Kent, R.A.; Margrave, J.L.,
Mass spectrometric studies at high temperatures. VII. The sublimation pressure of chromium(II) fluoride and the dissociation energy of chromium(I) fluoride,
J. Am. Chem. Soc., 1965, 87, 3582. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, References
- Symbols used in this document:
AE Appearance energy EA Electron affinity 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.