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NH2 anion


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

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Individual Reactions

H2N- + Hydrogen cation = Ammonia

By formula: H2N- + H+ = H3N

Quantity Value Units Method Reference Comment
Deltar1688.0 ± 1.2kJ/molD-EAWickham-Jones, Ervin, et al., 1989gas phase
Deltar1688.5 ± 3.3kJ/molG+TSMacKay, Hemsworth, et al., 1976gas phase
Deltar1683.2kJ/molN/ACheck, Faust, et al., 2001gas phase; HCrO3(t); ; «DELTA»S(EA)=6.6
Quantity Value Units Method Reference Comment
Deltar1656.8 ± 1.6kJ/molH-TSWickham-Jones, Ervin, et al., 1989gas phase
Deltar1657.3 ± 2.9kJ/molIMREMacKay, Hemsworth, et al., 1976gas phase
Deltar1654.4kJ/molN/ACheck, Faust, et al., 2001gas phase; HCrO3(t); ; «DELTA»S(EA)=6.6

(H2N- bullet Ammonia) + Ammonia = (H2N- bullet 2Ammonia)

By formula: (H2N- bullet H3N) + H3N = (H2N- bullet 2H3N)

Quantity Value Units Method Reference Comment
Deltar46.44kJ/molEstSnodgrass, Coe, et al., 1989gas phase; Affinity: shift in apparent EA from lesser-solvated ion. Ignores any neutral-neutral bond.

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

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

Quantity Value Units Method Reference Comment
Deltar389.9 ± 2.0kJ/molN/AWickham-Jones, Ervin, et al., 1989gas phase
Deltar244.2 ± 4.1kJ/molTherMacKay, Hemsworth, et al., 1976gas phase

H2N- + Ammonia = (H2N- bullet Ammonia)

By formula: H2N- + H3N = (H2N- bullet H3N)

Quantity Value Units Method Reference Comment
Deltar50.21kJ/molPDisSnodgrass, Coe, et al., 1989gas phase

Vibrational and/or electronic energy levels

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 by: Marilyn E. Jacox

State:   A


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

Td = 6220 ± 40 gas Feldman, 1971
Smyth and Brauman, 1972
Celotta, Bennett, et al., 1974
Wickham-Jones, Ervin, et al., 1989

State:   X


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

a1 1 Sym. stretch 3121.93 gas CC Tack, Rosenbaum, et al., 1986
Tack, Rosenbaum, et al., 1986, 2
2 Bend 1523 Ar IR Suzer and Andrews, 1988
b2 3 Asym. stretch 3190.29 gas CC Tack, Rosenbaum, et al., 1986, 2
3 Asym. stretch 3152 Ar IR Suzer and Andrews, 1988

Additional references: Jacox, 1994, page 26

Notes

dPhotodissociation threshold

References

Go To: Top, Reaction thermochemistry data, Vibrational and/or electronic energy levels, Notes

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

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]

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]

Snodgrass, Coe, et al., 1989
Snodgrass, J.T.; Coe, J.V.; Freidhoff, C.B.; McHugh, K.M.; Bowen, K.H., Photoelectron Spectroscopy of the Negative Cluster Ions, NH2-(NH3)n=1,2, J. Chem. Phys., 1989, 92, xxxx. [all data]

Feldman, 1971
Feldman, D., Photoablosung von Elektronen bei Si- und NH2-, Z. Naturforsch. A, 1971, 26, 1100. [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]

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]

Tack, Rosenbaum, et al., 1986
Tack, L.M.; Rosenbaum, N.H.; Owrutsky, J.C.; Saykally, R.J., Velocity modulation infrared laser spectroscopy of negative ions: Measurement of the «nu»1 vibration of amide (NH-2), J. Chem. Phys., 1986, 84, 12, 7056, https://doi.org/10.1063/1.450631 . [all data]

Tack, Rosenbaum, et al., 1986, 2
Tack, L.M.; Rosenbaum, N.H.; Owrutsky, J.C.; Saykally, R.J., Velocity modulation infrared laser spectroscopy and structure of the amide anion (NH-2 ), J. Chem. Phys., 1986, 85, 8, 4222, https://doi.org/10.1063/1.451792 . [all data]

Suzer and Andrews, 1988
Suzer, S.; Andrews, L., Matrix infrared study of NH-2 produced by electron impact on NH3, J. Chem. Phys., 1988, 89, 8, 5347, https://doi.org/10.1063/1.455604 . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]


Notes

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