4-Pyridinecarboxylic acid
- Formula: C6H5NO2
- Molecular weight: 123.1094
- IUPAC Standard InChIKey: TWBYWOBDOCUKOW-UHFFFAOYSA-N
- CAS Registry Number: 55-22-1
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Isonicotinic acid; γ-Picolinic acid; 4-Carboxypyridine; 4-Picolinic acid; Pyridinecarboxylic acid-(4); INA; Acide iso-nicotinique; α-Picolinic acid; Pyridine-4-carboxylic acid
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Phase change data
Go To: Top, Gas Chromatography, References, Notes
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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tfus | 590.65 | K | N/A | Leis and Curran, 1945 | Uncertainty assigned by TRC = 1. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔsubH° | 26.6 ± 0.1 | kcal/mol | N/A | Sabbah and Ider, 1999 | AC |
ΔsubH° | 27.2 ± 1.1 | kcal/mol | ME | Ribeiro da Silva, 1998 | Based on data from 345. to 392. K.; AC |
Enthalpy of sublimation
ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
25.7 ± 0.2 | 362. | C | Sabbah and Ider, 1999 | AC |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
32.2658 | 593. | Allan, Geddes, et al., 1989 | DH |
32.3 | 593. | Domalski and Hearing, 1996 | Enthalpy of fusion is much too large, compound likely decomposed; AC |
Gas Chromatography
Go To: Top, Phase change 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: NIST Mass Spectrometry Data Center, William E. Wallace, director
Van Den Dool and Kratz RI, polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 2088. | Cha, Kim, et al., 1998 | 60. m/0.25 mm/0.25 μm, 40. C @ 5. min, 3. K/min, 200. C @ 60. min |
References
Go To: Top, Phase change data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Leis and Curran, 1945
Leis, D.G.; Curran, B.C.,
Electric moments of some gamma-substituted pyridines,
J. Am. Chem. Soc., 1945, 67, 79. [all data]
Sabbah and Ider, 1999
Sabbah, Raphaël; Ider, Safi,
Energétique des liaisons inter- et intramoléculaires dans les trois acides carboxypyridiniques (acides picolinique, nicotinique et isonicotinique),
Revue canadienne de chimie, 1999, 77, 2, 249-257, https://doi.org/10.1139/cjc-77-2-249
. [all data]
Ribeiro da Silva, 1998
Ribeiro da Silva, M.,
Enthalpies of combustion of the pyridine N-oxide derivatives: 4-methyl-, 3-cyano-, 4-cyano-, 3-hydroxy-, 2-carboxy-, 4-carboxy-, and 3-methyl-4-nitro, and of the pyridine derivatives: 2-carboxy-, and 4-carboxy-. The dissociation enthalpies of the N-O bonds,
The Journal of Chemical Thermodynamics, 1998, 30, 7, 869-878, https://doi.org/10.1006/jcht.1998.0353
. [all data]
Allan, Geddes, et al., 1989
Allan, J.R.; Geddes, W.C.; Hindle, C.S.; Orr, A.E.,
Thermal analysis studies on pyridine carboxylic acid complexes of zinc(II),
Thermochim. Acta, 1989, 153, 249-256. [all data]
Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D.,
Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III,
J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985
. [all data]
Cha, Kim, et al., 1998
Cha, Y.J.; Kim, H.; Cadwallader, K.R.,
Aroma-active compounds in Kimchi during fermentation,
J. Agric. Food Chem., 1998, 46, 5, 1944-1953, https://doi.org/10.1021/jf9706991
. [all data]
Notes
Go To: Top, Phase change data, Gas Chromatography, References
- Symbols used in this document:
Tfus Fusion (melting) point ΔfusH Enthalpy of fusion ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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