Benzoxazole
- Formula: C7H5NO
- Molecular weight: 119.1207
- IUPAC Standard InChIKey: BCMCBBGGLRIHSE-UHFFFAOYSA-N
- CAS Registry Number: 273-53-0
- 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: 1-Oxa-3-aza-1H-indene; 1-Oxa-3-azaindene; USAF ek-5017
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Condensed phase thermochemistry data
Go To: Top, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°solid | -24.2 ± 1.1 | kJ/mol | Ccb | Steele, Chirico, et al., 1992 | DSC; ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°solid | -3445.0 ± 1.0 | kJ/mol | Ccb | Steele, Chirico, et al., 1992 | DSC; ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°solid,1 bar | 148.95 | J/mol*K | N/A | Steele, Chirico, et al., 1992, 2 | crystaline, I phase; S(liq,298.15 K) = 203.91 J/mol*K. S value for the liquid at 298.15 K was calculated with graphically extrapolated data.; DH |
Constant pressure heat capacity of solid
Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
141.59 | 298.15 | Steele, Chirico, et al., 1992, 2 | crystaline, I phase; T = 5 to 650 K. Cp(liq,298.15 K) = 178.50 J/mol*K. Cp value for the liquid at 298.15 K was calculated with graphically extrapolated data.; DH |
IR Spectrum
Go To: Top, Condensed phase thermochemistry data, Mass spectrum (electron ionization), UV/Visible spectrum, 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Gas Phase Spectrum
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Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.
Additional Data
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Owner | NIST Standard Reference Data Program Collection (C) 2018 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
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Origin | NIST Mass Spectrometry Data Center |
State | gas |
Instrument | HP-GC/MS/IRD |
Mass spectrum (electron ionization)
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, UV/Visible spectrum, 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
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Additional Data
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Due to licensing restrictions, this spectrum cannot be downloaded.
Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
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Origin | ALPHA Chemicals / NIST MS Data Center. |
NIST MS number | 125340 |
UV/Visible spectrum
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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: Victor Talrose, Eugeny B. Stern, Antonina A. Goncharova, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina
Spectrum
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Additional Data
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Source | Passerini, 1954 |
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Owner | INEP CP RAS, NIST OSRD Collection (C) 2007 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
Origin | INSTITUTE OF ENERGY PROBLEMS OF CHEMICAL PHYSICS, RAS |
Source reference | RAS UV No. 3044 |
Instrument | Beckman DU |
Melting point | 31 |
Boiling point | 182.5 |
Gas Chromatography
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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
Normal alkane RI, non-polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-1 | 1067. | Chen and Ho, 1999 | 60. m/0.32 mm/1. μm, He, 2. K/min; Tstart: 40. C; Tend: 260. C |
Capillary | DB-1 | 1067. | Chen and Ho, 1998 | 60. m/0.32 mm/1.0 μm, He, 2. K/min; Tstart: 40. C; Tend: 260. C |
Normal alkane RI, polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | Carbowax 20M | 1733. | Liardon and Ledermann, 1980 | H2, 2. K/min; Column length: 39. m; Column diameter: 0.30 mm; Tstart: 60. C; Tend: 220. C |
References
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Steele, Chirico, et al., 1992
Steele, W.V.; Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A.,
The thermodynamic properties of benzothiazole and benzoxazole,
J. Chem. Thermodyn., 1992, 24, 449-529. [all data]
Steele, Chirico, et al., 1992, 2
Steele, W.V.; Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A.,
The thermodynamic properties of benzothiazole and benzoxazole,
J. Chem. Thermodynam., 1992, 24, 499-529. [all data]
Passerini, 1954
Passerini, R.,
The near-ultra-violet absorption spectra of some heterocyclic compounds. Part I. Benzoxazoles,
J. Chem. Soc., 1954, 2256-2261. [all data]
Chen and Ho, 1999
Chen, J.; Ho, C.-T.,
Comparison of volatile generation in serine/threonine/glutamine-ribose/glucose/fructose model systems,
J. Agric. Food Chem., 1999, 47, 2, 643-647, https://doi.org/10.1021/jf980771a
. [all data]
Chen and Ho, 1998
Chen, J.; Ho, C.-T.,
Volatile compounds generated in serine-monosaccharide model systems,
J. Agric. Food Chem., 1998, 46, 4, 1518-1522, https://doi.org/10.1021/jf970934f
. [all data]
Liardon and Ledermann, 1980
Liardon, R.; Ledermann, S.,
volatile components of fermented soya hydrolysate. II. Composition of basic fraction,
Z. Lebensm. Unters. Forsch., 1980, 170, 3, 208-213, https://doi.org/10.1007/BF01042542
. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Gas Chromatography, References
- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔcH°solid Enthalpy of combustion of solid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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