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Amino radical

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Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Quantity Value Units Method Reference Comment
Deltafgas190.37kJ/molReviewChase, 1998Data last reviewed in June, 1977
Quantity Value Units Method Reference Comment
gas,1 bar194.71J/mol*KReviewChase, 1998Data last reviewed in June, 1977

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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View table.

Temperature (K) 298. - 1300.1300. - 6000.
A 29.8592835.33497
B 6.11780311.01555
C 11.54976-1.172814
D -5.0244400.022623
E 0.088730-2.136042
F 181.4053174.1565
G 229.0535227.6519
H 190.3720190.3720
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1977 Data last reviewed in June, 1977

Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: J.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

HN- + Hydrogen cation = Amino radical

By formula: HN- + H+ = H2N

Quantity Value Units Method Reference Comment
Deltar1664.7 ± 2.0kJ/molD-EANeumark, Lykke, et al., 1985gas phase
Quantity Value Units Method Reference Comment
Deltar1635.9 ± 2.4kJ/molH-TSNeumark, Lykke, et al., 1985gas phase

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 as indicated in comments:
HL - E.P. Hunter and S.G. Lias

Data compiled as indicated in comments:
B - J.E. Bartmess
LL - S.G. Lias and J.F. Liebman
LBLHLM - S.G. Lias, J.E. Bartmess, J.F. Liebman, J.L. Holmes, R.D. Levin, and W.G. Mallard
LLK - S.G. Lias, R.D. Levin, and S.A. Kafafi
RDSH - H.M. Rosenstock, K. Draxl, B.W. Steiner, and J.T. Herron

View reactions leading to H2N+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
Proton affinity (review)773.4kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity742.0kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Deltaf(+) ion1264. ± 6.3kJ/molN/AN/A 
Quantity Value Units Method Reference Comment
DeltafH(+) ion,0K1266. ± 6.3kJ/molN/AN/A 

Electron affinity determinations

EA (eV) Method Reference Comment
0.7710 ± 0.0050LPESWickham-Jones, Ervin, et al., 1989B
0.766 ± 0.036D-EAMacKay, Hemsworth, et al., 1976B
0.776 ± 0.037LPESCelotta, Bennett, et al., 1974B
0.744 ± 0.022LPDSmyth and Brauman, 1972B
0.760 ± 0.040PDFeldman, 1971B
0.740 ± 0.030LPDSmyth, McIver, et al., 1971B
0.722924N/ACheck, Faust, et al., 2001HCrO3(t); ; «DELTA»S(EA)=6.6; B
1.11879SIPage and Goode, 1969The Magnetron method, lacking mass analysis, is not considered reliable.; B

Ionization energy determinations

IE (eV) Method Reference Comment
10.78 ± 0.05DERQi, Sheng, et al., 1995LL
11.14 ± 0.01PIGibson, Greene, et al., 1985LBLHLM
11.46 ± 0.01PEDunlavey, Dyke, et al., 1980LLK
11.7EIMelton, 1966RDSH
11.22DERDibeler, Walker, et al., 1966RDSH
11.4 ± 0.1EIFoner and Hudson, 1958RDSH
12.0EILocht, Servais, et al., 1988Vertical value; LL
12.00 ± 0.01PEDunlavey, Dyke, et al., 1980Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
HN+17.440 ± 0.005HPIGibson, Greene, et al., 1985LBLHLM

De-protonation reactions

HN- + Hydrogen cation = Amino radical

By formula: HN- + H+ = H2N

Quantity Value Units Method Reference Comment
Deltar1664.7 ± 2.0kJ/molD-EANeumark, Lykke, et al., 1985gas phase; B
Quantity Value Units Method Reference Comment
Deltar1635.9 ± 2.4kJ/molH-TSNeumark, Lykke, et al., 1985gas phase; B

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.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [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]

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]


Notes

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