NH2 anion
- Formula: H2N-
- Molecular weight: 16.0231
- CAS Registry Number: 17655-31-1
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Reaction thermochemistry data
Go To: Top, Vibrational and/or electronic energy levels, 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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1688.0 ± 1.2 | kJ/mol | D-EA | Wickham-Jones, Ervin, et al., 1989 | gas phase |
ΔrH° | 1688.5 ± 3.3 | kJ/mol | G+TS | MacKay, Hemsworth, et al., 1976 | gas phase |
ΔrH° | 1683.2 | kJ/mol | N/A | Check, Faust, et al., 2001 | gas phase; HCrO3(t); ; ΔS(EA)=6.6 |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1656.8 ± 1.6 | kJ/mol | H-TS | Wickham-Jones, Ervin, et al., 1989 | gas phase |
ΔrG° | 1657.3 ± 2.9 | kJ/mol | IMRE | MacKay, Hemsworth, et al., 1976 | gas phase |
ΔrG° | 1654.4 | kJ/mol | N/A | Check, Faust, et al., 2001 | gas phase; HCrO3(t); ; ΔS(EA)=6.6 |
By formula: (H2N- • H3N) + H3N = (H2N- • 2H3N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 46.44 | kJ/mol | Est | Snodgrass, Coe, et al., 1989 | gas phase; Affinity: shift in apparent EA from lesser-solvated ion. Ignores any neutral-neutral bond. |
By formula: (H2N- • 4294967295HN) + HN = H2N-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 389.9 ± 2.0 | kJ/mol | N/A | Wickham-Jones, Ervin, et al., 1989 | gas phase |
ΔrH° | 244.2 ± 4.1 | kJ/mol | Ther | MacKay, Hemsworth, et al., 1976 | gas phase |
By formula: H2N- + H3N = (H2N- • H3N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 50.21 | kJ/mol | PDis | Snodgrass, Coe, et al., 1989 | gas 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 | λmin (nm) |
λmax (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
d | Photodissociation 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 ν1 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
Go To: Top, Reaction thermochemistry data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
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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