Difluoramine
- Formula: F2HN
- Molecular weight: 53.0114
- IUPAC Standard InChI: InChI=1S/F2HN/c1-3-2/h3H
- IUPAC Standard InChIKey: ULFHSQLFQYTZLS-UHFFFAOYSA-N
- CAS Registry Number: 10405-27-3
- 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: Difluoroamine; HNF2; Fluorimide
- 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.
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 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
F2N- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 371.0 ± 2.1 | kcal/mol | G+TS | Koppel, Taft, et al., 1994 | gas phase; Exptl, not interpolated dHf(F2NH) from Gurvich, Veyts, et al., is used. It agrees far better with MO calns |
| ΔrH° | 360.0 ± 2.1 | kcal/mol | IMRE | Koppel, Pikver, et al., 1981 | gas phase; This acidity disagrees with the authors' later( Koppel, Taft, et al., 1994) value by 10 kcal/mol, but agrees with G3(MP2) computations much better.The acidity of HNF2 is not well known therefore. |
| ΔrH° | 365.7 ± 3.5 | kcal/mol | D-EA | Ruckhaberle, Lehmann, et al., 1997 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 363.3 ± 2.0 | kcal/mol | IMRE | Koppel, Taft, et al., 1994 | gas phase; Exptl, not interpolated dHf(F2NH) from Gurvich, Veyts, et al., is used. It agrees far better with MO calns |
| ΔrG° | 352.2 ± 2.0 | kcal/mol | H-TS | Koppel, Pikver, et al., 1981 | gas phase; This acidity disagrees with the authors' later( Koppel, Taft, et al., 1994) value by 10 kcal/mol, but agrees with G3(MP2) computations much better.The acidity of HNF2 is not well known therefore. |
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 as indicated in comments:
B - John E. Bartmess
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 11.60 | PE | Baumgartel, Jochims, et al., 1989 | LL |
| 11.53 ± 0.08 | PE | Colbourne, Frost, et al., 1980 | LLK |
| 12.38 | PE | Baumgartel, Jochims, et al., 1989 | Vertical value; LL |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| F2N+ | 15.1 | H | PE | Baumgartel, Jochims, et al., 1989 | LL |
De-protonation reactions
F2N- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 371.0 ± 2.1 | kcal/mol | G+TS | Koppel, Taft, et al., 1994 | gas phase; Exptl, not interpolated dHf(F2NH) from Gurvich, Veyts, et al., is used. It agrees far better with MO calns; B |
| ΔrH° | 360.0 ± 2.1 | kcal/mol | IMRE | Koppel, Pikver, et al., 1981 | gas phase; This acidity disagrees with the authors' later( Koppel, Taft, et al., 1994) value by 10 kcal/mol, but agrees with G3(MP2) computations much better.The acidity of HNF2 is not well known therefore.; B |
| ΔrH° | 365.7 ± 3.5 | kcal/mol | D-EA | Ruckhaberle, Lehmann, et al., 1997 | gas phase; B |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | 363.3 ± 2.0 | kcal/mol | IMRE | Koppel, Taft, et al., 1994 | gas phase; Exptl, not interpolated dHf(F2NH) from Gurvich, Veyts, et al., is used. It agrees far better with MO calns; B |
| ΔrG° | 352.2 ± 2.0 | kcal/mol | H-TS | Koppel, Pikver, et al., 1981 | gas phase; This acidity disagrees with the authors' later( Koppel, Taft, et al., 1994) value by 10 kcal/mol, but agrees with G3(MP2) computations much better.The acidity of HNF2 is not well known therefore.; B |
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.
Koppel, Taft, et al., 1994
Koppel, I.A.; Taft, R.W.; Anvia, F.; Zhu, S.Z.; Hu, L.Q.; Sung, K.S.; Desmarteau, D.D.; Yagupolskii, L.M.,
The Gas-Phase Acidities of Very Strong Neutral Bronsted Acids,
J. Am. Chem. Soc., 1994, 116, 7, 3047, https://doi.org/10.1021/ja00086a038
. [all data]
Gurvich, Veyts, et al.
Gurvich, L.V.; Veyts, I.V.; Alcock, C.B.,
Hemisphere Publishing, NY, 1989, V. 1 2, Thermodynamic Properties of Individual Substances, 4th Ed. [all data]
Koppel, Pikver, et al., 1981
Koppel, I.; Pikver, R.; Sugis, A.; Suurmaa, E.; Lippmaa, E.,
FTICR Study of Structure and Solvent Effects on Basicity of Some Anions in the Gas Phase,
Org. Reac., 1981, 18, 3. [all data]
Ruckhaberle, Lehmann, et al., 1997
Ruckhaberle, N.; Lehmann, L.; Matejcik, S.; Illenberger, E.; Bouteiller, Y.; Periquet, V.; Museur, L.; Desfran,
Free Electron Attachment and Rydberg Electron Transfer to NF3 Molecules and Clusters,
J. Phys. Chem. A, 1997, 101, 51, 9942, https://doi.org/10.1021/jp972422+
. [all data]
Baumgartel, Jochims, et al., 1989
Baumgartel, H.; Jochims, H.-W.; Ruhl, E.; Bock, H.; Dammel, R.; Minkwitz, J.; Nass, R.,
Photoelectron and photoionization mass spectra of the fluoramines NH3-nFn1,
Inorg. Chem., 1989, 28, 943. [all data]
Colbourne, Frost, et al., 1980
Colbourne, D.; Frost, D.C.; McDowell, C.A.; Westwood, N.P.C.,
The vacuum ultraviolet photoelectron spectrum of difluoramine,
Chem. Phys. Lett., 1980, 72, 247. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy ΔrG° Free energy of reaction 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.