Cyanamide

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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
Δfsolid14.05kcal/molCcbSalley and Gray, 1951correction of Salley and Gray, 1948; ALS
Quantity Value Units Method Reference Comment
Δcsolid-176.42kcal/molCcbSalley and Gray, 1951correction of Salley and Gray, 1948; ALS

Constant pressure heat capacity of solid

Cp,solid (cal/mol*K) Temperature (K) Reference Comment
18.7300.DeWit, DeKruif, et al., 1983T = 90 to 300 K. Linearly extrapolated.; DH

Phase change data

Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry data, 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 as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Ttriple318.71KN/ADe Wit, De Kruif, et al., 1983Uncertainty assigned by TRC = 0.02 K; TRC
Quantity Value Units Method Reference Comment
Δsub18.0kcal/molN/ADe Wit, Van Miltenburg, et al., 1983AC

Enthalpy of sublimation

ΔsubH (kcal/mol) Temperature (K) Method Reference Comment
18.1290.TE,MEDe Wit, Van Miltenburg, et al., 1983Based on data from 227. to 289. K.; AC

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
1.738318.71DeWit, DeKruif, et al., 1983DH
2.09317.2Acree, 1991AC

Entropy of fusion

ΔfusS (cal/mol*K) Temperature (K) Reference Comment
5.454318.71DeWit, DeKruif, et al., 1983DH

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

Go To: Top, Condensed phase thermochemistry data, Phase change data, 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: John E. Bartmess

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

CHN2- + Hydrogen cation = Cyanamide

By formula: CHN2- + H+ = CH2N2

Quantity Value Units Method Reference Comment
Δr350.7 ± 2.3kcal/molG+TSKoppel, Taft, et al., 1994gas phase; DH: 99±3, 97BOR/JI 2
Δr349.2 ± 2.8kcal/molG+TSCacace, Depetris, et al., 1993gas phase
Δr351.9 ± 3.2kcal/molG+TSKroeker and Kass, 1990gas phase; Between tBuSH, HOAc
Quantity Value Units Method Reference Comment
Δr344.1 ± 2.0kcal/molIMREKoppel, Taft, et al., 1994gas phase; DH: 99±3, 97BOR/JI 2
Δr342.6 ± 2.5kcal/molIMRECacace, Depetris, et al., 1993gas phase
Δr345.3 ± 3.0kcal/molIMRBKroeker and Kass, 1990gas phase; Between tBuSH, HOAc

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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Mass 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-2370
NIST MS number 238424

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References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Notes

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

Salley and Gray, 1951
Salley, D.J.; Gray, J.B., Heats of combustion of some organic nitrogen compounds, J. Am. Chem. Soc., 1951, 73, 5925. [all data]

Salley and Gray, 1948
Salley, D.J.; Gray, J.B., Heats of combustion of some organic nitrogen compounds, J. Am. Chem. Soc., 1948, 70, 2650-2653. [all data]

DeWit, DeKruif, et al., 1983
DeWit, H.G.M.; DeKruif, C.G.; Van Miltenburg, J.C., Thermodynamic properties of molecular organic crystals containing organic crystals containing nitrogen, oxygen, and sulfur. II. Molar heat capacities of eight compounds by adiabatic calorimetry, J. Chem. Thermodynam., 1983, 15, 891-902. [all data]

De Wit, De Kruif, et al., 1983
De Wit, H.G.M.; De Kruif, C.G.; Van Miltenburg, J.C., Thermodynamic properties of molecular organic crystals containing nitrogen, oxygen, and sulfur II. Molar heat capacities of eight compounds by adiabatic calorimetry, J. Chem. Thermodyn., 1983, 15, 9, 891, https://doi.org/10.1016/0021-9614(83)90095-2 . [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]

Koppel, Taft, et al., 1994
Koppel, I.A.; Taft, R.W.; Anvia, F.; Zhu, S.Z.; Hu, L.Q.; Sung, K.S.; Desmarteau, D.D.; Yagupolskii, L.M., The Gas-Phase Acidities of Very Strong Neutral Bronsted Acids, J. Am. Chem. Soc., 1994, 116, 7, 3047, https://doi.org/10.1021/ja00086a038 . [all data]

Cacace, Depetris, et al., 1993
Cacace, F.; Depetris, G.; Grandinetti, F.; Occhiucci, G., Gas-Phase Ion Chemistry of Cyanamide - A Mass Spectrometric and Abinitio Study of Gaseous [H2N-CN]+, [H2N-CN]H+, and [HN-CN]- Ions, J. Phys. Chem., 1993, 97, 16, 4239, https://doi.org/10.1021/j100118a048 . [all data]

Kroeker and Kass, 1990
Kroeker, R.L.; Kass, S.R., Diazirinyl Anion: A Cyclic 4-pi Electron System, J. Am. Chem. Soc., 1990, 112, 24, 9024, https://doi.org/10.1021/ja00180a082 . [all data]


Notes

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), References