Guanidine

• Formula: CH₅N₃
• Molecular weight: 59.0705
• IUPAC Standard InChI: InChI=1S/CH5N3/c2-1(3)4/h(H5,2,3,4) Copy

  
• IUPAC Standard InChIKey: ZRALSGWEFCBTJO-UHFFFAOYSA-N Copy
• CAS Registry Number: 113-00-8
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  View 3d structure (requires JavaScript / HTML 5)
• Other names: Aminoformamidine; Aminomethanamidine; Carbamamidine; Carbamidine; Guanidin; Imidourea; Iminourea; (NH2)2C=NH
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Condensed phase thermochemistry data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
• Options:
  • Switch to calorie-based units

Condensed phase thermochemistry data

Go To: Top, Gas phase ion energetics data, 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Gas phase ion energetics data

Go To: Top, Condensed phase thermochemistry data, References, Notes

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

Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias

Data compiled as indicated in comments:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

References

Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics data, Notes

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

Kirpichev, Titov, et al., 1968
Kirpichev, E.P.; Titov, L.V.; Rubtsov, Yu.I.; Gavrilova, L.A., The heat of formation of guanidine, Russ. J. Phys. Chem. (Engl. Transl.), 1968, 42, 269-270. [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Loudon, Maccoll, et al., 1968
Loudon, A.G.; Maccoll, A.; Webb, K.S., Charge location and fragmentation in mass spectrometry. II. The mass spectra and ionization potentials of some methylguanidines, Advan. Mass Spectrom., 1968, 4, 223. [all data]

Notes

Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics data, References

• Symbols used in this document:
  

  ΔcH°solid	Enthalpy of combustion of solid at standard conditions
  ΔfH°solid	Enthalpy of formation of solid 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.