Imidogen

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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
Δfgas376.56kJ/molReviewChase, 1998Data last reviewed in June, 1977
Quantity Value Units Method Reference Comment
gas,1 bar181.25J/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. to 800.800. to 6000.
A 31.3176628.05920
B -8.9315445.100840
C 11.58629-0.767827
D -2.5440990.056843
E -0.041861-1.054720
F 367.3820366.0623
G 221.0867211.8351
H 376.5604376.5604
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: 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

(H2N- • 4294967295Imidogen) + Imidogen = H2N-

By formula: (H2N- • 4294967295HN) + HN = H2N-

Quantity Value Units Method Reference Comment
Δr389.9 ± 2.0kJ/molN/AWickham-Jones, Ervin, et al., 1989gas phase
Δr244.2 ± 4.1kJ/molTherMacKay, Hemsworth, et al., 1976gas phase

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, 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 HN+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
Δf(+) ion1654.kJ/molN/AN/A 
Quantity Value Units Method Reference Comment
ΔfH(+) ion,0K1659.kJ/molN/AN/A 

Electron affinity determinations

EA (eV) Method Reference Comment
0.3700 ± 0.0040LPESNeumark, Lykke, et al., 1985B
0.381 ± 0.014LPESEngleking and Lineberger, 1976Neutral singlet 36.6±0.4 kcal/mol above triplet. See also Neumark, Lykke, et al., 1985, 2; B
0.380 ± 0.030LPESCelotta, Bennett, et al., 1974B

Ionization energy determinations

IE (eV) Method Reference Comment
12.8EIMelton, 1966RDSH
13.1 ± 0.2EIFoner and Hudson, 1966RDSH
13.10 ± 0.05EIReed and Snedden, 1959RDSH
13.49 ± 0.01PEDunlavey, Dyke, et al., 1980Vertical value; LLK

Ion clustering data

Go To: Top, Gas phase thermochemistry data, 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

(H2N- • 4294967295Imidogen) + Imidogen = H2N-

By formula: (H2N- • 4294967295HN) + HN = H2N-

Quantity Value Units Method Reference Comment
Δr389.9 ± 2.0kJ/molN/AWickham-Jones, Ervin, et al., 1989gas phase
Δr244.2 ± 4.1kJ/molTherMacKay, Hemsworth, et al., 1976gas phase

References

Go To: Top, Gas phase thermochemistry data, 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.

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

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]

Engleking and Lineberger, 1976
Engleking, P.C.; Lineberger, W.C., Laser photoelectron spectrometry of NH-: Electron affinity and intercombination energy difference in NH, J. Chem. Phys., 1976, 65, 4323. [all data]

Neumark, Lykke, et al., 1985, 2
Neumark, D.M.; Lykke, K.R.; Andersen, T.; Lineberger, W.C., Laser photodetachment measurement of the electron affinity of atomic oxygen, Phys. Rev. A:, 1985, 32, 1890. [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]

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]

Foner and Hudson, 1966
Foner, S.N.; Hudson, R.L., Mass spectrometry of free radicals and vibronically excited molecules produced by pulsed electrical discharges, J. Chem. Phys., 1966, 45, 40. [all data]

Reed and Snedden, 1959
Reed, R.I.; Snedden, W., The ionisation potential of NH, J. Chem. Soc., 1959, 4132. [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]


Notes

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