Pyridine, 1-oxide
- Formula: C5H5NO
- Molecular weight: 95.0993
- IUPAC Standard InChI: InChI=1S/C5H5NO/c7-6-4-2-1-3-5-6/h1-5H
- IUPAC Standard InChIKey: ILVXOBCQQYKLDS-UHFFFAOYSA-N
- CAS Registry Number: 694-59-7
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Pyridine oxide; Pyridine N-oxide
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Gas phase 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | 87.9 ± 2.5 | kJ/mol | Cm | Shaofeng and Pilcher, 1988 | |
| ΔfH°gas | 87.9 ± 2.5 | kJ/mol | Cm | Shaofeng and Pilcher, 1988 |
Condensed phase 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°solid | 7.7 | kJ/mol | Cm | da Silva, Chagas, et al., 1988 | reaction calorimetry(solution) |
| ΔfH°solid | 8.6 ± 2.3 | kJ/mol | Cm | Shaofeng and Pilcher, 1988 | |
| ΔfH°solid | 8.6 ± 2.3 | kJ/mol | Cm | Shaofeng and Pilcher, 1988 |
Phase change 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 as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 81.9 ± 1.5 | kJ/mol | V | da Silva, Chagas, et al., 1988 | reaction calorimetry(solution); ALS |
| ΔsubH° | 79.3 ± 1.0 | kJ/mol | C | Shaofeng and Pilcher, 1988 | ALS |
| ΔsubH° | 79.3 ± 1.0 | kJ/mol | C | Shaofeng and Pilcher, 1988 | ALS |
| ΔsubH° | 79.3 ± 1.0 | kJ/mol | N/A | Shaofeng and Pilcher, 1988 | AC |
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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
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
3 +
= 3
+ KClO3
By formula: 3C5H5NO + ClK = 3C5H5N + KClO3
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 315. ± 10. | kJ/mol | Cm | Shaofeng and Pilcher, 1988 | solid phase |
3 +
= 3
+ KBrO3
By formula: 3C5H5NO + BrK = 3C5H5N + KBrO3
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 313.6 ± 9.6 | kJ/mol | Cm | Shaofeng and Pilcher, 1988 | solid phase |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Shaofeng and Pilcher, 1988
Shaofeng, L.; Pilcher, G.,
Enthalpy of formation of pyridine-N-oxide: the dissociation enthalpy of the (N-O) bond,
J. Chem. Thermodyn., 1988, 20, 463-465. [all data]
da Silva, Chagas, et al., 1988
da Silva, M.L.C.P.; Chagas, A.P.; Airoldi, C.,
Heterocyclic N-oxide ligands: A thermochemical study of adducts with zinc, cadmium, and mercury chlorides,
J. Chem. Soc. Dalton Trans., 1988, 2113-2116. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, References
- Symbols used in this document:
ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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