1,3-Diazine

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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
ΔfH°gas46.80 ± 0.36kcal/molCcrNabavian, Sabbah, et al., 1977Reanalyzed by Pedley, Naylor, et al., 1986, Original value = 46.15 ± 0.47 kcal/mol
ΔfH°gas46.83 ± 0.33kcal/molCcbTjebbes, 1962Reanalyzed by Cox and Pilcher, 1970, Original value = 46.99 ± 0.24 kcal/mol

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

Quantity Value Units Method Reference Comment
ΔfH°liquid34.23 ± 0.44kcal/molCcrNabavian, Sabbah, et al., 1977 
ΔfH°liquid35.04 ± 0.20kcal/molCcbTjebbes, 1962 
Quantity Value Units Method Reference Comment
ΔcH°liquid-547.06 ± 0.42kcal/molCcrNabavian, Sabbah, et al., 1977 
ΔcH°liquid-547.88 ± 0.20kcal/molCcbTjebbes, 1962 

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
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.

Quantity Value Units Method Reference Comment
Tboil396.7KN/AWeast and Grasselli, 1989BS
Quantity Value Units Method Reference Comment
ΔvapH°12. ± 2.kcal/molAVGN/AAverage of 7 values; Individual data points

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 as indicated in comments:
MS - José A. Martinho Simões
B - John E. Bartmess
RCD - 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

C10H5CrNO5 (solution) + Carbon monoxide (solution) = Chromium hexacarbonyl (solution) + 1,3-Diazine (solution)

By formula: C10H5CrNO5 (solution) + CO (solution) = C6CrO6 (solution) + C4H4N2 (solution)

Quantity Value Units Method Reference Comment
ΔrH°-14.8kcal/molKinSWovkulich and Atwood, 1980solvent: Hexane; The data rely on the enthalpy and entropy of activation for the forward reaction, 25.4 ± 1.1 kcal/mol and 13.0±14.6 J/(mol K) Dennenberg and Darensbourg, 1972, and also on the enthalpy and entropy of activation for the Cr-CO dissociation in Cr(CO)6, 40.20 ± 0.60 kcal/mol and 94.6±6.3 J/(mol K) Graham and Angelici, 1967. The latter data were obtained in decalin; MS

Tungsten hexacarbonyl (cr) + 1,3-Diazine (l) = C10H5NO5W (cr) + Carbon monoxide (g)

By formula: C6O6W (cr) + C4H4N2 (l) = C10H5NO5W (cr) + CO (g)

Quantity Value Units Method Reference Comment
ΔrH°8.27kcal/molN/ANakashima and Adamson, 1982The reaction enthalpy was calculated from the enthalpy of the reaction W(CO)6(solution) + py(solution) = W(CO)5(py)(solution) + CO(solution) in cyclohexane, 6.55 ± 0.69 kcal/mol, together with the enthalpies of solution of W(CO)6(cr), W(CO)5(py)(cr), and py(l), 35.7, 36.4, and 1.9 kcal/mol, respectively Nakashima and Adamson, 1982.; MS

C4H3N2- + Hydrogen cation = 1,3-Diazine

By formula: C4H3N2- + H+ = C4H4N2

Quantity Value Units Method Reference Comment
ΔrH°385.2 ± 2.5kcal/molTDEqMeot-ner and Kafafi, 1988gas phase; Acid: pyrimidine. Anchored to 88MEO scale, not "87 acidity scale; B
Quantity Value Units Method Reference Comment
ΔrG°376.80 ± 0.70kcal/molN/AWren, Vogelhuber, et al., 2012gas phase; B
ΔrG°376.9 ± 2.0kcal/molTDEqMeot-ner and Kafafi, 1988gas phase; Acid: pyrimidine. Anchored to 88MEO scale, not "87 acidity scale; B

Tungsten hexacarbonyl (solution) + 1,3-Diazine (solution) = C10H5NO5W (solution) + Carbon monoxide (solution)

By formula: C6O6W (solution) + C4H4N2 (solution) = C10H5NO5W (solution) + CO (solution)

Quantity Value Units Method Reference Comment
ΔrH°6.55 ± 0.69kcal/molPCNakashima and Adamson, 1982solvent: Cyclohexane; MS
ΔrH°5.95 ± 0.69kcal/molPCNakashima and Adamson, 1982solvent: Benzene; MS
ΔrH°4.40 ± 0.1kcal/molPCNakashima and Adamson, 1982solvent: Tetrahydrofuran; MS

C39H68O3P2W (solution) + 1,3-Diazine (solution) = C44H71NO3P2W (solution) + Hydrogen (g)

By formula: C39H68O3P2W (solution) + C4H4N2 (solution) = C44H71NO3P2W (solution) + H2 (g)

Quantity Value Units Method Reference Comment
ΔrH°-9.49 ± 0.50kcal/molRSCGonzalez, Zhang, et al., 1988solvent: Toluene; MS
ΔrH°-9.99 ± 0.50kcal/molRSCGonzalez, Zhang, et al., 1988solvent: Tetrahydrofuran; MS

C14H10CrN2O4 (cr) = 21,3-Diazine (g) + 4Carbon monoxide (g) + chromium (cr)

By formula: C14H10CrN2O4 (cr) = 2C4H4N2 (g) + 4CO (g) + Cr (cr)

Quantity Value Units Method Reference Comment
ΔrH°>47.6kcal/molTD-HFCAdedeji, Connor, et al., 1978The reaction enthalpy is a low limit Adedeji, Connor, et al., 1978.; MS

C8H6MoO3 (solution) + 31,3-Diazine (solution) = C18H15MoN3O3 (solution) + 1,3-Cyclopentadiene (solution)

By formula: C8H6MoO3 (solution) + 3C4H4N2 (solution) = C18H15MoN3O3 (solution) + C5H6 (solution)

Quantity Value Units Method Reference Comment
ΔrH°-16.7 ± 0.69kcal/molRSCNolan, Hoff, et al., 1985solvent: Pyridine; Reaction temperature: 323 K; MS

Nitric oxide anion + 1,3-Diazine = C4H4N3O-

By formula: NO- + C4H4N2 = C4H4N3O-

Quantity Value Units Method Reference Comment
ΔrH°16.6 ± 2.3kcal/molN/ALe Barbu, Schiedt, et al., 2002gas phase; Affinity is difference in EAs of lesser solvated species; B

C9H9CrN3O3 (solution) + 31,3-Diazine (solution) = C18H15CrN3O3 (solution) + 3Acetonitrile (solution)

By formula: C9H9CrN3O3 (solution) + 3C4H4N2 (solution) = C18H15CrN3O3 (solution) + 3C2H3N (solution)

Quantity Value Units Method Reference Comment
ΔrH°-11.5 ± 0.91kcal/molRSCMukerjee, Lang, et al., 1992solvent: Tetrahydrofuran; MS

C7H9Cl2NPd (solution) + 1,3-Diazine (l) = (PdCl2(C5H5N)2) (solution) + Ethylene (solution)

By formula: C7H9Cl2NPd (solution) + C4H4N2 (l) = (PdCl2(C5H5N)2) (solution) + C2H4 (solution)

Quantity Value Units Method Reference Comment
ΔrH°-13.8 ± 0.41kcal/molRSCPartenheimer and Durham, 1974solvent: Dichloromethane; MS

C10H5NO5W (cr) + Carbon monoxide (g) = Tungsten hexacarbonyl (g) + 1,3-Diazine (g)

By formula: C10H5NO5W (cr) + CO (g) = C6O6W (g) + C4H4N2 (g)

Quantity Value Units Method Reference Comment
ΔrH°20. ± 2.4kcal/molDSCDaamen, van der Poel, et al., 1979Please also see Meester, Vriends, et al., 1976.; MS

C12H16CrO5 (solution) + 1,3-Diazine (solution) = Heptane (solution) + C10H5CrNO5 (solution)

By formula: C12H16CrO5 (solution) + C4H4N2 (solution) = C7H16 (solution) + C10H5CrNO5 (solution)

Quantity Value Units Method Reference Comment
ΔrH°-20.1 ± 0.41kcal/molPACYang, Vaida, et al., 1988solvent: Heptane; MS

C39H66MoO3P3 (solution) + 1,3-Diazine (solution) = C44H71MoNO3P2 (solution)

By formula: C39H66MoO3P3 (solution) + C4H4N2 (solution) = C44H71MoNO3P2 (solution)

Quantity Value Units Method Reference Comment
ΔrH°-16.9 ± 0.60kcal/molRSCZhang, Gonzalez, et al., 1991solvent: Toluene; MS

Molybdenum hexacarbonyl (cr) + 31,3-Diazine (g) = C18H15MoN3O3 (cr) + 3Carbon monoxide (g)

By formula: C6MoO6 (cr) + 3C4H4N2 (g) = C18H15MoN3O3 (cr) + 3CO (g)

Quantity Value Units Method Reference Comment
ΔrH°-12.0 ± 1.7kcal/molHFCAdedeji, Connor, et al., 1978MS

Tungsten hexacarbonyl (cr) + 31,3-Diazine (g) = C18H15N3O3W (g) + 3Carbon monoxide (g)

By formula: C6O6W (cr) + 3C4H4N2 (g) = C18H15N3O3W (g) + 3CO (g)

Quantity Value Units Method Reference Comment
ΔrH°-13.1 ± 2.0kcal/molHFCAdedeji, Connor, et al., 1978MS

C10H5CrNO5 (cr) + Carbon monoxide (g) = Chromium hexacarbonyl (g) + 1,3-Diazine (g)

By formula: C10H5CrNO5 (cr) + CO (g) = C6CrO6 (g) + C4H4N2 (g)

Quantity Value Units Method Reference Comment
ΔrH°18. ± 1.kcal/molDSCDaamen, van der Poel, et al., 1979MS

C10H5MoNO5 (cr) + Carbon monoxide (g) = Molybdenum hexacarbonyl (g) + 1,3-Diazine (g)

By formula: C10H5MoNO5 (cr) + CO (g) = C6MoO6 (g) + C4H4N2 (g)

Quantity Value Units Method Reference Comment
ΔrH°14. ± 0.7kcal/molDSCDaamen, van der Poel, et al., 1979MS

Iron ion (1+) + 1,3-Diazine = (Iron ion (1+) • 1,3-Diazine)

By formula: Fe+ + C4H4N2 = (Fe+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°47.5 ± 1.9kcal/molCIDTAmunugama and Rodgers, 2001RCD

Chromium ion (1+) + 1,3-Diazine = (Chromium ion (1+) • 1,3-Diazine)

By formula: Cr+ + C4H4N2 = (Cr+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°42.4 ± 1.5kcal/molCIDTAmunugama and Rodgers, 2001RCD

Titanium ion (1+) + 1,3-Diazine = (Titanium ion (1+) • 1,3-Diazine)

By formula: Ti+ + C4H4N2 = (Ti+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°51.1 ± 2.5kcal/molCIDTAmunugama and Rodgers, 2001RCD

Manganese ion (1+) + 1,3-Diazine = (Manganese ion (1+) • 1,3-Diazine)

By formula: Mn+ + C4H4N2 = (Mn+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°38.0 ± 2.3kcal/molCIDTAmunugama and Rodgers, 2001RCD

Scandium ion (1+) + 1,3-Diazine = (Scandium ion (1+) • 1,3-Diazine)

By formula: Sc+ + C4H4N2 = (Sc+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°51.2 ± 2.2kcal/molCIDTAmunugama and Rodgers, 2001RCD

Magnesium ion (1+) + 1,3-Diazine = (Magnesium ion (1+) • 1,3-Diazine)

By formula: Mg+ + C4H4N2 = (Mg+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°41.5 ± 1.4kcal/molCIDTAmunugama and Rodgers, 2001RCD

Vanadium ion (1+) + 1,3-Diazine = (Vanadium ion (1+) • 1,3-Diazine)

By formula: V+ + C4H4N2 = (V+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°48.8 ± 1.7kcal/molCIDTAmunugama and Rodgers, 2001RCD

Nickel ion (1+) + 1,3-Diazine = (Nickel ion (1+) • 1,3-Diazine)

By formula: Ni+ + C4H4N2 = (Ni+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°58.3 ± 2.3kcal/molCIDTAmunugama and Rodgers, 2001RCD

Aluminum ion (1+) + 1,3-Diazine = (Aluminum ion (1+) • 1,3-Diazine)

By formula: Al+ + C4H4N2 = (Al+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°38.0 ± 1.4kcal/molCIDTAmunugama and Rodgers, 2001RCD

Zinc ion (1+) + 1,3-Diazine = (Zinc ion (1+) • 1,3-Diazine)

By formula: Zn+ + C4H4N2 = (Zn+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°49.8 ± 1.8kcal/molCIDTAmunugama and Rodgers, 2001RCD

Cobalt ion (1+) + 1,3-Diazine = (Cobalt ion (1+) • 1,3-Diazine)

By formula: Co+ + C4H4N2 = (Co+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°58.6 ± 3.2kcal/molCIDTAmunugama and Rodgers, 2001RCD

Copper ion (1+) + 1,3-Diazine = (Copper ion (1+) • 1,3-Diazine)

By formula: Cu+ + C4H4N2 = (Cu+ • C4H4N2)

Quantity Value Units Method Reference Comment
ΔrH°59.6 ± 2.3kcal/molCIDTAmunugama and Rodgers, 2001RCD

IR Spectrum

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), UV/Visible spectrum, References, Notes

Data compiled by: Coblentz Society, Inc.

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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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.
Origin Japan AIST/NIMC Database- Spectrum MS-IW-3052
NIST MS number 231129

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.

UV/Visible spectrum

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), 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: 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 Bredereck, Gompper, et al., 1957
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. 14
Instrument Spectrophotometer SF-16
Melting point 22
Boiling point 123.8

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Notes

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

Nabavian, Sabbah, et al., 1977
Nabavian, P.M.; Sabbah, R.; Chastel, R.; Laffitte, M., Thermodynamique de composes azotes. II. Etude thermochimique des acides aminobenzoiques, de la pyrimidine, de l'uracile et de la thymine., J. Chim. Phys., 1977, 74, 115-126. [all data]

Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P., Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]

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]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [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]

Wovkulich and Atwood, 1980
Wovkulich, M.J.; Atwood, J.D., J. Organometal. Chem., 1980, 184, 77. [all data]

Dennenberg and Darensbourg, 1972
Dennenberg, R.J.; Darensbourg, D.J., Inorg. Chem., 1972, 11, 72. [all data]

Graham and Angelici, 1967
Graham, J.R.; Angelici, R.J., Inorg. Chem., 1967, 6, 2082. [all data]

Nakashima and Adamson, 1982
Nakashima, M.; Adamson, A.W., J. Phys. Chem., 1982, 86, 2905. [all data]

Meot-ner and Kafafi, 1988
Meot-ner, M.; Kafafi, S.A., Carbon Acidities of Aromatic Compounds, J. Am. Chem. Soc., 1988, 110, 19, 6297, https://doi.org/10.1021/ja00227a003 . [all data]

Wren, Vogelhuber, et al., 2012
Wren, S.W.; Vogelhuber, K.M.; Garver, J.M.; Kato, S.; Sheps, L.; Bierbaum, V.M.; Lineberger, W.C., C-H Bond Strengths and Acidities in Aromatic Systems: Effects of Nitrogen Incorporation in Mono-, Di-, and Triazines, J. Am. Chem. Soc., 2012, 134, 15, 6584-6595, https://doi.org/10.1021/ja209566q . [all data]

Gonzalez, Zhang, et al., 1988
Gonzalez, A.A.; Zhang, K.; Nolan, S.P.; Lopez de la Vega, R.; Mukerjee, S.L.; Hoff, C.D., Organometallics, 1988, 7, 2429. [all data]

Adedeji, Connor, et al., 1978
Adedeji, F.A.; Connor, J.A.; Demain, C.P.; Martinho Simões, J.A.; Skinner, H.A.; Zafarani- Moattar, M.T., J. Organometal. Chem., 1978, 149, 333. [all data]

Nolan, Hoff, et al., 1985
Nolan, S.P.; Hoff, C.D.; Landrum, J.T., J. Organometal. Chem., 1985, 282, 357. [all data]

Le Barbu, Schiedt, et al., 2002
Le Barbu, K.; Schiedt, J.; Weinkauf, R.; Schlag, E.W.; Nilles, J.M.; Xu, S.J.; Thomas, O.C.; Bowen, K.H., Microsolvation of small anions by aromatic molecules: An exploratory study, J. Chem. Phys., 2002, 116, 22, 9663-9671, https://doi.org/10.1063/1.1475750 . [all data]

Mukerjee, Lang, et al., 1992
Mukerjee, S.L.; Lang, R.F.; Ju, T.; Kiss, G.; Hoff, C.D.; Nolan, S.P., Inorg. Chem., 1992, 31, 4885. [all data]

Partenheimer and Durham, 1974
Partenheimer, W.; Durham, B., J. Am. Chem. Soc., 1974, 96, 3800. [all data]

Daamen, van der Poel, et al., 1979
Daamen, H.; van der Poel, H.; Stufkens, D.J.; Oskam, A., Thermochim. Acta, 1979, 34, 69. [all data]

Meester, Vriends, et al., 1976
Meester, M.A.M.; Vriends, R.C.J.; Stufkens, D.J.; Vrieze, K., Inorg. Chim. Acta, 1976, 19, 95. [all data]

Yang, Vaida, et al., 1988
Yang, G.K.; Vaida, V.; Peters, K.S., Polyhedron, 1988, 7, 1619. [all data]

Zhang, Gonzalez, et al., 1991
Zhang, K.; Gonzalez, A.A.; Murkerjee, S.L.; Chou, S.-J.; Hoff, C.D.; Kubat- Martin, K.A.; Barnhart, D.; Kubas, G.J., J. Am. Chem. Soc., 1991, 113, 9170. [all data]

Amunugama and Rodgers, 2001
Amunugama, R.; Rodgers, M.T., Periodic Trends in the Binding of Metal Ions to Pyrimidine Studied by Threshold Collision-Induced Dissociation and Density Functional Theory, J. Phys. Chem. A, 2001, 105, 43, 9883, https://doi.org/10.1021/jp010663i . [all data]

Bredereck, Gompper, et al., 1957
Bredereck, H.; Gompper, R.; Morlock, G., Eine neue pyrimidin-synthese, Chem. Ber., 1957, 90, 942-952. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References