NCCðCCðC anion
- Formula: C5N-
- Molecular weight: 74.0607
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Gas phase ion energetics 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
Electron affinity of neutral species
| EAneutral (eV) | Method | Reference | Comment |
|---|---|---|---|
| 4.450 ± 0.030 | LPES | Yen, Garand, et al., 2010 | |
| 2.29999 | EIAE | Dibeler, Reese, et al., 1961 | From HC≡C-(C≡C)2-C≡N. The derived acidity is ca. 40 kcal/mol too weak, based on homologs. |
Protonation reactions
C5N- + = C5HN
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 344.0 ± 5.1 | kcal/mol | D-EA | Yen, Garand, et al., 2010 | gas phase |
| ΔrH° | 393.6 ± 5.0 | kcal/mol | D-EA | Dibeler, Reese, et al., 1961 | gas phase; From HC≡C-(C≡C)2-C≡N. The derived acidity is ca. 40 kcal/mol too weak, based on homologs. |
References
Go To: Top, 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.
Yen, Garand, et al., 2010
Yen, T.A.; Garand, E.; Shreve, A.T.; Neumark, D.M.,
Anion Photoelectron Spectroscopy of C3N- and C5N-,
J. Phys. Chem. A, 2010, 114, 9, 3215-3220, https://doi.org/10.1021/jp9093996
. [all data]
Dibeler, Reese, et al., 1961
Dibeler, V.H.; Reese, R.M.; Franklin, J.L.,
Mass spectrometric study of cyanogen and cyanoacetylenes,
J. Am. Chem. Soc., 1961, 83, 1813. [all data]
Notes
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- Symbols used in this document:
EAneutral Electron affinity of neutral species ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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