NH2 anion
- Formula: H2N-
- Molecular weight: 16.0231
- CAS Registry Number: 17655-31-1
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Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, Ion clustering data, 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 |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, Ion clustering data, 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
Protonation 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 |
Ion clustering data
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, 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. Searches may be limited to ion clustering reactions. A general reaction search form is also available.
Clustering reactions
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 |
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. |
Vibrational and/or electronic energy levels
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics 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 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, Gas phase ion energetics data, Ion clustering 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, Gas phase ion energetics data, Ion clustering 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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