1,2-Diazine, protonated
- Formula: C4H5N2+
- Molecular weight: 81.0954
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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: Michael M. Meot-Ner (Mautner) and Sharon G. Lias
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Individual Reactions
C4H5N2+ + = (C4H5N2+ •
)
By formula: C4H5N2+ + C12H24O6 = (C4H5N2+ • C12H24O6)
Bond type: Hydrogen bonds with polydentate bonding in positive ions
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 180. ± 20. | kJ/mol | PHPMS | Meot-Ner (Mautner), 1983 | gas phase; Entropy change calculated or estimated |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 180. | J/mol*K | N/A | Meot-Ner (Mautner), 1983 | gas phase; Entropy change calculated or estimated |
Free energy of reaction
| ΔrG° (kJ/mol) | T (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 67. | 600. | PHPMS | Meot-Ner (Mautner), 1983 | gas phase; Entropy change calculated or estimated |
C4H5N2+ + = (C4H5N2+ •
)
By formula: C4H5N2+ + C8H18O4 = (C4H5N2+ • C8H18O4)
Bond type: Hydrogen bonds with polydentate bonding in positive ions
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 155. | kJ/mol | PHPMS | Meot-Ner (Mautner), 1983 | gas phase; triglyme |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 173. | J/mol*K | PHPMS | Meot-Ner (Mautner), 1983 | gas phase; triglyme |
C4H5N2+ + = (C4H5N2+ •
)
By formula: C4H5N2+ + C6H14O3 = (C4H5N2+ • C6H14O3)
Bond type: Hydrogen bonds with polydentate bonding in positive ions
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 136. | kJ/mol | PHPMS | Meot-Ner (Mautner), 1983 | gas phase; diglyme |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 151. | J/mol*K | PHPMS | Meot-Ner (Mautner), 1983 | gas phase; diglyme |
C4H5N2+ + = (C4H5N2+ •
)
By formula: C4H5N2+ + C8H16O4 = (C4H5N2+ • C8H16O4)
Bond type: Hydrogen bonds with polydentate bonding in positive ions
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 155. | kJ/mol | PHPMS | Meot-Ner (Mautner), 1983 | gas phase |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔrS° | 171. | J/mol*K | PHPMS | Meot-Ner (Mautner), 1983 | gas phase |
References
Go To: Top, Reaction thermochemistry data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Meot-Ner (Mautner), 1983
Meot-Ner (Mautner), M.,
The Ionic Hydrogen Bond. 3. Multiple and -CH+...O- Bonds. Complexes of Ammonium Ions with Polyethers and Crown Ethers,
J. Am. Chem. Soc., 1983, 105, 15, 4912, https://doi.org/10.1021/ja00353a012
. [all data]
Notes
Go To: Top, Reaction thermochemistry data, References
- Symbols used in this document:
T Temperature ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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