NCS anion
- Formula: CNS-
- Molecular weight: 58.083
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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 |
|---|---|---|---|
| 3.5370 ± 0.0050 | LPES | Bradforth, Kim, et al., 1993 | Acid HNCS. HSCN up by ca. 8 kcal/mol |
| 1.99475 | SI | Page, 1972 | The Magnetron method, lacking mass analysis, is not considered reliable. |
| 2.147 ± 0.022 | SI | Napper and Page, 1963 | From (SCN)2 The Magnetron method, lacking mass analysis, is not considered reliable. |
Protonation reactions
CNS- + =
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | <325.3 ± 1.1 | kcal/mol | D-EA | Bradforth, Kim, et al., 1993 | gas phase; Acid HNCS. HSCN up by ca. 8 kcal/mol |
| ΔrH° | 328.6 ± 5.1 | kcal/mol | G+TS | Bierbaum, Grabowski, et al., 1984 | gas phase; Acid: HNCS |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrG° | <317.6 ± 1.4 | kcal/mol | H-TS | Bradforth, Kim, et al., 1993 | gas phase; Acid HNCS. HSCN up by ca. 8 kcal/mol |
| ΔrG° | 320.9 ± 5.0 | kcal/mol | IMRB | Bierbaum, Grabowski, et al., 1984 | gas phase; Acid: HNCS |
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.
Bradforth, Kim, et al., 1993
Bradforth, S.E.; Kim, E.H.; Arnold, D.W.; Neumark, D.M.,
Photoelectron Spectroscopy of CN-, NCO-, and NCS-,
J. Chem. Phys., 1993, 98, 2, 800, https://doi.org/10.1063/1.464244
. [all data]
Page, 1972
Page, F.M.,
Experimental determination of the electron affinities of inorganic radicals,
Adv. Chem. Ser., 1972, 36, 68. [all data]
Napper and Page, 1963
Napper, R.; Page, F.M.,
Determination of Electron Affinities. Part 5. Cyanide and Thiocyanate Radicals,
Trans. Farad. Soc., 1963, 59, 1086, https://doi.org/10.1039/tf9635901086
. [all data]
Bierbaum, Grabowski, et al., 1984
Bierbaum, V.M.; Grabowski, J.J.; DePuy, C.H.,
Gas-phase synthesis and reactions of nitrogen- and sulfur-containing anions,
J. Phys. Chem., 1984, 88, 1389. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
EAneutral Electron affinity of neutral species 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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