1,3,5-Triazine

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Gas 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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfgas225.87 ± 0.89kJ/molCcrBystrom, 1982 
Δfgas224.7 ± 4.6kJ/molCmIniguez, Lopez, et al., 1982 

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
Δcliquid-1782.6 ± 0.92kJ/molCcbJohnson and Prosen, 1985Private communication; ALS
Quantity Value Units Method Reference Comment
Δfsolid171.69 ± 0.77kJ/molCcrBystrom, 1982ALS
Quantity Value Units Method Reference Comment
Δcsolid-1780.96 ± 0.67kJ/molCcrBystrom, 1982ALS
Quantity Value Units Method Reference Comment
solid,1 bar125.97J/mol*KN/Avan Bommel, van Miltenburg, et al., 1988DH

Constant pressure heat capacity of solid

Cp,solid (J/mol*K) Temperature (K) Reference Comment
95.57298.15van Bommel, van Miltenburg, et al., 1988T = 10 to 340 K.; DH
95.6298.15Briels and van Miltenburg, 1979T = 160 to 382 K.; DH

Phase change 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:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil387.2KN/AWeast and Grasselli, 1989BS
Quantity Value Units Method Reference Comment
Ttriple353.44KN/AVan Bommel, van Miltenburg, et al., 1988Crystal phase 1 phase; Uncertainty assigned by TRC = 0.02 K; TRC
Ttriple353.9KN/ABriels and van Miltenburg, 1979, 2Uncertainty assigned by TRC = 0.2 K; TRC
Quantity Value Units Method Reference Comment
Δvap38.8 ± 1.9kJ/molCGCLipkind and Chickos, 2009Based on data from 342. to 373. K. See also Lipkind and Chickos, 2009, 2.; AC
Δvap55.2 ± 0.1kJ/molVJohnson and Prosen, 1985Private communication; ALS
Quantity Value Units Method Reference Comment
Δsub54.18 ± 0.19kJ/molCBystrom, 1982ALS
Δsub54.2kJ/molN/ABystrom, 1982DRB
Δsub54.2 ± 0.2kJ/molN/ABystrom, 1982AC
Δsub56.5 ± 2.1kJ/molVIniguez, Lopez, et al., 1982ALS

Enthalpy of sublimation

ΔsubH (kJ/mol) Temperature (K) Method Reference Comment
58.2222.TE,MEDe Wit, Van Miltenburg, et al., 1983Based on data from 212. to 229. K.; AC

Enthalpy of fusion

ΔfusH (kJ/mol) Temperature (K) Reference Comment
14.56353.4Acree, 1991AC

Enthalpy of phase transition

ΔHtrs (kJ/mol) Temperature (K) Initial Phase Final Phase Reference Comment
0.0740197.7crystaline, IIcrystaline, Ivan Bommel, van Miltenburg, et al., 1988First order treatment from 175 K H = 127.4 J/mol First order treatment from 150 K H = 362.8 J/mol Second order treatment; DH
14.560353.44crystaline, Iliquidvan Bommel, van Miltenburg, et al., 1988DH
14.584353.9crystaline, IliquidBriels and van Miltenburg, 1979DH

Entropy of phase transition

ΔStrs (J/mol*K) Temperature (K) Initial Phase Final Phase Reference Comment
41.21353.9crystaline, IliquidBriels and van Miltenburg, 1979DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


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: Robert C. Dunbar

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

Lithium ion (1+) + 1,3,5-Triazine = (Lithium ion (1+) • 1,3,5-Triazine)

By formula: Li+ + C3H3N3 = (Li+ • C3H3N3)

Quantity Value Units Method Reference Comment
Δr127. ± 13.kJ/molCIDTAmunugama and Rodgers, 2000 

Sodium ion (1+) + 1,3,5-Triazine = (Sodium ion (1+) • 1,3,5-Triazine)

By formula: Na+ + C3H3N3 = (Na+ • C3H3N3)

Quantity Value Units Method Reference Comment
Δr88. ± 3.kJ/molCIDTAmunugama and Rodgers, 2000 

Potassium ion (1+) + 1,3,5-Triazine = (Potassium ion (1+) • 1,3,5-Triazine)

By formula: K+ + C3H3N3 = (K+ • C3H3N3)

Quantity Value Units Method Reference Comment
Δr55. ± 3.kJ/molCIDTAmunugama and Rodgers, 2000 

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Notes

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

Bystrom, 1982
Bystrom, K., The stabilization energy of 1,3,5-triazine derived from measurements of the enthalpies of combustion and sublimation, J. Chem. Thermodyn., 1982, 14, 865-870. [all data]

Iniguez, Lopez, et al., 1982
Iniguez, J.C.; Lopez, M.E.; McEachern, D.M., Vapor pressure and sublimation enthalpy of s-triazine, Rev. Soc. Quim. Mex., 1982, 26, 122-124. [all data]

Johnson and Prosen, 1985
Johnson, W.H.; Prosen, E.J., Determination of the enthalpies of combustion and formation of substituted triazines in an adiabatic rotating bomb calorimeter, J. Res. NBS, 1985, 90, 295-303. [all data]

van Bommel, van Miltenburg, et al., 1988
van Bommel, M.J.; van Miltenburg, J.C.; Schuijff, A., Heat-capacity measurements and thermodynamic functions of 1,3,5-triazine and 1,3,5-trioxane, J. Chem. Thermodynam., 1988, 20, 397-403. [all data]

Briels and van Miltenburg, 1979
Briels, W.J.; van Miltenburg, J.C., s-Triazine: heat capacities between 130 and 380 K, the solid state transition, and the enthalpy of melting, J. Chem. Phys., 1979, 70, 1064-1066. [all data]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Van Bommel, van Miltenburg, et al., 1988
Van Bommel, M.J.; van Miltenburg, J.C.; Schuijff, A., Heat Capacity Measurements and Thermodynamic Functions of 1,3,5- Triazine and 1,3,5-Trioxane, J. Chem. Thermodyn., 1988, 20, 397-403. [all data]

Briels and van Miltenburg, 1979, 2
Briels, W.J.; van Miltenburg, J.C., s-Triazine:heat capacities between 130 and 380 K, the solid state transition, and the enthalpy of melting, J. Chem. Phys., 1979, 70, 1064. [all data]

Lipkind and Chickos, 2009
Lipkind, Dmitri; Chickos, James S., An examination of the vaporization enthalpies and vapor pressures of pyrazine, pyrimidine, pyridazine, and 1,3,5-triazine, Struct Chem, 2009, 20, 1, 49-58, https://doi.org/10.1007/s11224-008-9389-5 . [all data]

Lipkind and Chickos, 2009, 2
Lipkind, D.; Chickos, J.S., , Abstract from 38th Great Lakes Regional Meeting of the American Chemical Society, May 13-16, Chicago, IL, 2009, GLRM-275. [all data]

De Wit, Van Miltenburg, et al., 1983
De Wit, H.G.M.; Van Miltenburg, J.C.; De Kruif, C.G., Thermodynamic properties of molecular organic crystals containing nitrogen, oxygen, and sulphur 1. Vapour pressures and enthalpies of sublimation, The Journal of Chemical Thermodynamics, 1983, 15, 7, 651-663, https://doi.org/10.1016/0021-9614(83)90079-4 . [all data]

Acree, 1991
Acree, William E., Thermodynamic properties of organic compounds: enthalpy of fusion and melting point temperature compilation, Thermochimica Acta, 1991, 189, 1, 37-56, https://doi.org/10.1016/0040-6031(91)87098-H . [all data]

Amunugama and Rodgers, 2000
Amunugama, R.; Rodgers, M.T., Absolute Alkali Metal Ion Binding Affinities of Several Azines Determined by Threshold Collision-Induced Dissociation and Ab Initio Theory, Int. J. Mass Spectrom., 2000, 195/196, 439, https://doi.org/10.1016/S1387-3806(99)00145-1 . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, References