Pyrazine

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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 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
Δfliquid33.41 ± 0.28kcal/molCcbTjebbes, 1962ALS
Quantity Value Units Method Reference Comment
Δcliquid-546.25 ± 0.28kcal/molCcbTjebbes, 1962ALS

Constant pressure heat capacity of solid

Cp,solid (cal/mol*K) Temperature (K) Reference Comment
43.0298.Boyd, Comper, et al., 1979crystaline, III phase; T = 295 to 312 K. Data graphically only.; DH

IR 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: Coblentz Society, Inc.

Condensed Phase Spectrum

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IR spectrum
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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

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Owner COPYRIGHT (C) 1988 by COBLENTZ SOCIETY INC.
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin DOW CHEMICAL COMPANY
Source reference COBLENTZ NO. 5739
Date 1965/11/12
State SOLUTION (10% CCl4 FOR 2.6-7.5, 10% CS2 FOR 7.5-24 MICRON)
Instrument BECKMAN IR-9 (GRATING)
Instrument parameters ORDER CHANGES: 670, 1200, 2000 CM-1
Path length 0.012 CM, 0.012 CM
SPECTRAL CONTAMINATION DUE TO CS2 AROUND 400, 850 AND CCl4 AROUND 1550 CM-1 HAVE BEEN SUBTRACTED
Resolution 2
Sampling procedure TRANSMISSION
Data processing DIGITIZED BY COBLENTZ SOCIETY (BATCH I) FROM HARD COPY
Melting point 53 C
Boiling point 116 C

This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.


References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Tjebbes, 1962
Tjebbes, J., The heats of combustion and formation of the three diazines and their resonance energies, Acta Chem. Scand., 1962, 16, 916-921. [all data]

Boyd, Comper, et al., 1979
Boyd, R.K.; Comper, J.; Ferguson, G., Entropy changes and structural implications for crystalline phases of pyrazine, Can. J. Chem., 1979, 57, 3056-3060. [all data]


Notes

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