Glyoxal

Formula: C₂H₂O₂
Molecular weight: 58.0361
IUPAC Standard InChI: InChI=1S/C2H2O2/c3-1-2-4/h1-2H
IUPAC Standard InChIKey: LEQAOMBKQFMDFZ-UHFFFAOYSA-N
CAS Registry Number: 107-22-2
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: Ethanedial; Biformal; Biformyl; Diformyl; Ethanedione; Glyoxal aldehyde; Glyoxylaldehyde; Oxal; Oxalaldehyde; 1,2-Ethanedione; (CHO)2; Diformal; Ethane-1,2-dione; Ethandial; Aerotex glyoxal 40; ODIX; Protectol GL 40
Permanent link for this species. Use this link for bookmarking this species for future reference.
Information on this page:
Other data available:
Data at other public NIST sites:
- Gas Phase Kinetics Database
Options:
- Switch to calorie-based units

Gas phase thermochemistry data

Data compiled as indicated in comments:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_gas	-212.0 ± 0.79	kJ/mol	Cm	Fletcher and Pilcher, 1970	ALS
Quantity	Value	Units	Method	Reference	Comment
Δ_cH°_gas	-860.90 ± 0.75	kJ/mol	Cm	Fletcher and Pilcher, 1970	Corresponding Δ_fHº_gas = -212.0 kJ/mol (simple calculation by NIST; no Washburn corrections); ALS

Constant pressure heat capacity of gas

C_p,gas (J/mol*K)	Temperature (K)	Reference	Comment
36.36	50.	Thermodynamics Research Center, 1997	p=1 bar. Recommended entropies and heat capacities are in close agreement with other statistically calculated values [ Compton D.A.C., 1977, Hollenstein H., 1980]. Calculation [ Natarajan A., 1982] seems to be erroneous.; GT
41.42	100.
45.95	150.
50.49	200.
57.63	273.15
60.23	298.15
60.43	300.
71.21	400.
81.43	500.
90.12	600.
97.05	700.
102.44	800.
106.61	900.
109.86	1000.
112.44	1100.
114.52	1200.
116.22	1300.
117.63	1400.
118.8	1500.

References

Go To: Top, Gas phase thermochemistry data, Notes

Fletcher and Pilcher, 1970
Fletcher, R.A.; Pilcher, G., Measurements of heats of combustion by flame calorimetry, Trans. Faraday Soc., 1970, 66, 794-799. [all data]

Thermodynamics Research Center, 1997
Thermodynamics Research Center, Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]

Compton D.A.C., 1977
Compton D.A.C., Values for the gas-phase thermodynamic functions of conjugated compounds existing as a mixture of conformers, J. Chem. Soc. Perkin Trans. 2, 1977, 1307-1311. [all data]

Hollenstein H., 1980
Hollenstein H., Sum of states, isomeric group and symmetry number of nonrigid molecules, Chem. Phys., 1980, 47, 269-285. [all data]

Natarajan A., 1982
Natarajan A., Vibrational analysis of glyoxal-h2, -d2 and -hd, J. Indian Chem. Soc., 1982, 59, 1156-1157. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, References

Symbols used in this document:

C_p,gas Constant pressure heat capacity of gas

Δ_cH°_gas Enthalpy of combustion of gas at standard conditions

Δ_fH°_gas Enthalpy of formation of gas at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
Customer support for NIST Standard Reference Data products.

C_p,gas	Constant pressure heat capacity of gas
Δ_cH°_gas	Enthalpy of combustion of gas at standard conditions
Δ_fH°_gas	Enthalpy of formation of gas at standard conditions