Amino radical
- Formula: H2N
- Molecular weight: 16.0226
- IUPAC Standard InChIKey: MDFFNEOEWAXZRQ-UHFFFAOYSA-N
- CAS Registry Number: 13770-40-6
- Chemical structure:
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Gas phase ion energetics data
Go To: Top, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
Data compiled as indicated in comments:
B - John E. Bartmess
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to H2N+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 184.8 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 177.3 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
ΔfH°(+) ion | 302.0 ± 1.5 | kcal/mol | N/A | N/A | |
Quantity | Value | Units | Method | Reference | Comment |
ΔfH(+) ion,0K | 302.7 ± 1.5 | kcal/mol | N/A | N/A |
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
0.7710 ± 0.0050 | LPES | Wickham-Jones, Ervin, et al., 1989 | B |
0.766 ± 0.036 | D-EA | MacKay, Hemsworth, et al., 1976 | B |
0.776 ± 0.037 | LPES | Celotta, Bennett, et al., 1974 | B |
0.744 ± 0.022 | LPD | Smyth and Brauman, 1972 | B |
0.760 ± 0.040 | PD | Feldman, 1971 | B |
0.740 ± 0.030 | LPD | Smyth, McIver, et al., 1971 | B |
0.722924 | N/A | Check, Faust, et al., 2001 | HCrO3(t); ; ΔS(EA)=6.6; B |
1.11879 | SI | Page and Goode, 1969 | The Magnetron method, lacking mass analysis, is not considered reliable.; B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
10.78 ± 0.05 | DER | Qi, Sheng, et al., 1995 | LL |
11.14 ± 0.01 | PI | Gibson, Greene, et al., 1985 | LBLHLM |
11.46 ± 0.01 | PE | Dunlavey, Dyke, et al., 1980 | LLK |
11.7 | EI | Melton, 1966 | RDSH |
11.22 | DER | Dibeler, Walker, et al., 1966 | RDSH |
11.4 ± 0.1 | EI | Foner and Hudson, 1958 | RDSH |
12.0 | EI | Locht, Servais, et al., 1988 | Vertical value; LL |
12.00 ± 0.01 | PE | Dunlavey, Dyke, et al., 1980 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
HN+ | 17.440 ± 0.005 | H | PI | Gibson, Greene, et al., 1985 | LBLHLM |
De-protonation reactions
HN- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 397.87 ± 0.48 | kcal/mol | D-EA | Neumark, Lykke, et al., 1985 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 390.99 ± 0.57 | kcal/mol | H-TS | Neumark, Lykke, et al., 1985 | gas phase; B |
References
Go To: Top, 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.
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]
Wickham-Jones, Ervin, et al., 1989
Wickham-Jones, C.T.; Ervin, K.M.; Ellison, G.B.; Lineberger, W.C.,
NH2 Electron Affinity,
J. Chem. Phys., 1989, 91, 4, 2762, https://doi.org/10.1063/1.456994
. [all data]
MacKay, Hemsworth, et al., 1976
MacKay, G.J.; Hemsworth, R.S.; Bohme, D.K.,
Absolute gas-phase acidities of CH3NH2, C2H5NH2, (CH3)2NH, and (CH3)3N,
Can. J. Chem., 1976, 54, 1624. [all data]
Celotta, Bennett, et al., 1974
Celotta, R.S.; Bennett, R.A.; Hall, J.L.,
Laser Photodetachment Determination of the Electron Affinities of OH, NH2, NH, SO2, and S2,
J. Chem. Phys., 1974, 60, 5, 1740, https://doi.org/10.1063/1.1681268
. [all data]
Smyth and Brauman, 1972
Smyth, K.C.; Brauman, J.I.,
Photodetachment of electrons from amide and arsenide ions: The electron affinities of NH2 and AsH2.,
J. Chem. Phys., 1972, 56, 4620. [all data]
Feldman, 1971
Feldman, D.,
Photoablosung von Elektronen bei Si- und NH2-,
Z. Naturforsch. A, 1971, 26, 1100. [all data]
Smyth, McIver, et al., 1971
Smyth, K.C.; McIver, R.T.; Brauman, J.I.; Wallace, R.W.,
Photodetachment of negative ions using a continuously tunable laser and an ICR spectrometer,
J. Chem. Phys., 1971, 54, 2758. [all data]
Check, Faust, et al., 2001
Check, C.E.; Faust, T.O.; Bailey, J.M.; Wright, B.J.; Gilbert, T.M.; Sunderlin, L.S.,
Addition of Polarization and Diffuse Functions to the LANL2DZ Basis Set for P-Block Elements,
J. Phys. Chem. A,, 2001, 105, 34, 8111, https://doi.org/10.1021/jp011945l
. [all data]
Page and Goode, 1969
Page, F.M.; Goode, G.C.,
Negative Ions and the Magnetron., Wiley, NY, 1969. [all data]
Qi, Sheng, et al., 1995
Qi, F.; Sheng, L.; Zhang, Y.; Yu, S.; Li, W.-K.,
Experimental and theoretical study of the dissociation energies DO(H2N-H) and DO(H2N+-H) and other related quantities,
Chem. Phys. Lett., 1995, 234, 450. [all data]
Gibson, Greene, et al., 1985
Gibson, S.; Greene, J.; Berkowitz, J.,
Photoionization of the amidogen radical,
J. Chem. Phys., 1985, 83, 4319. [all data]
Dunlavey, Dyke, et al., 1980
Dunlavey, S.J.; Dyke, J.M.; Jonathan, N.; Morris, A.,
Vacuum ultraviolet photoelectron spectroscopy of transient species. Part 11. The NH2(X(2)B1) radical,
Mol. Phys., 1980, 39, 1121. [all data]
Melton, 1966
Melton, C.E.,
Study by mass spectrometry of the decomposition of ammonia by ionizing radiation in a wide-range radiolysis source,
J. Chem. Phys., 1966, 45, 4414. [all data]
Dibeler, Walker, et al., 1966
Dibeler, V.H.; Walker, J.A.; Rosenstock, H.M.,
Mass spectrometric study of photoionization. V.Water and ammonia,
J.Res. NBS, 1966, 70A, 459. [all data]
Foner and Hudson, 1958
Foner, S.N.; Hudson, R.L.,
Mass spectrometric detection of triazene and tetrazene and studies of the free radicals NH2, and N2H3,
J. Chem. Phys., 1958, 29, 442. [all data]
Locht, Servais, et al., 1988
Locht, R.; Servais, C.; Ligot, M.; Derwa, F.; Momigny, J.,
The dissociative electroionization of ammonia and ammonia-d3. I. The NH+ and NH2+ dissociation channels,
Chem. Phys., 1988, 123, 443. [all data]
Neumark, Lykke, et al., 1985
Neumark, D.M.; Lykke, K.R.; Anderson, T.; Lineberger, W.C.,
Infrared Spectrum and Autodetachment Dynamics of NH-,
J. Chem. Phys., 1985, 83, 9, 4364, https://doi.org/10.1063/1.449052
. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy EA Electron affinity ΔfH(+) ion,0K Enthalpy of formation of positive ion at 0K 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
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