chromium

• Formula: Cr
• Molecular weight: 51.9961
• IUPAC Standard InChI: InChI=1S/Cr Copy

  
• IUPAC Standard InChIKey: VYZAMTAEIAYCRO-UHFFFAOYSA-N Copy
• CAS Registry Number: 7440-47-3
• Chemical structure:
  This structure is also available as a 2d Mol file
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase ion energetics data
  • Ion clustering data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
• Data at other public NIST sites:
  • NIST Atomic Spectra Database - Lines Holdings (on physics web site)
  • NIST Atomic Spectra Database - Levels Holdings (on physics web site)
  • NIST Atomic Spectra Database - Ground states and ionization energies (on physics web site)
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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Gas phase ion energetics data

Go To: Top, Ion clustering 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
L - Sharon G. Lias

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to Cr⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

Ion clustering 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: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

 +  = ( • )

By formula: Cr⁺ + Cr = (Cr⁺ • Cr)

Enthalpy of reaction

( • ) +  = ( • 2)

By formula: (Cr⁺ • Cr) + Cr = (Cr⁺ • 2Cr)

Enthalpy of reaction

( • 2) +  = ( • 3)

By formula: (Cr⁺ • 2Cr) + Cr = (Cr⁺ • 3Cr)

Enthalpy of reaction

( • 3) +  = ( • 4)

By formula: (Cr⁺ • 3Cr) + Cr = (Cr⁺ • 4Cr)

Enthalpy of reaction

( • 4) +  = ( • 5)

By formula: (Cr⁺ • 4Cr) + Cr = (Cr⁺ • 5Cr)

Enthalpy of reaction

( • 5) +  = ( • 6)

By formula: (Cr⁺ • 5Cr) + Cr = (Cr⁺ • 6Cr)

Enthalpy of reaction

( • 6) +  = ( • 7)

By formula: (Cr⁺ • 6Cr) + Cr = (Cr⁺ • 7Cr)

Enthalpy of reaction

( • 7) +  = ( • 8)

By formula: (Cr⁺ • 7Cr) + Cr = (Cr⁺ • 8Cr)

Enthalpy of reaction

( • 8) +  = ( • 9)

By formula: (Cr⁺ • 8Cr) + Cr = (Cr⁺ • 9Cr)

Enthalpy of reaction

( • 9) +  = ( • 10)

By formula: (Cr⁺ • 9Cr) + Cr = (Cr⁺ • 10Cr)

Enthalpy of reaction

( • 10) +  = ( • 11)

By formula: (Cr⁺ • 10Cr) + Cr = (Cr⁺ • 11Cr)

Enthalpy of reaction

( • 11) +  = ( • 12)

By formula: (Cr⁺ • 11Cr) + Cr = (Cr⁺ • 12Cr)

Enthalpy of reaction

( • 12) +  = ( • 13)

By formula: (Cr⁺ • 12Cr) + Cr = (Cr⁺ • 13Cr)

Enthalpy of reaction

( • 13) +  = ( • 14)

By formula: (Cr⁺ • 13Cr) + Cr = (Cr⁺ • 14Cr)

Enthalpy of reaction

( • 14) +  = ( • 15)

By formula: (Cr⁺ • 14Cr) + Cr = (Cr⁺ • 15Cr)

Enthalpy of reaction

( • 15) +  = ( • 16)

By formula: (Cr⁺ • 15Cr) + Cr = (Cr⁺ • 16Cr)

Enthalpy of reaction

( • 16) +  = ( • 17)

By formula: (Cr⁺ • 16Cr) + Cr = (Cr⁺ • 17Cr)

Enthalpy of reaction

( • 17) +  = ( • 18)

By formula: (Cr⁺ • 17Cr) + Cr = (Cr⁺ • 18Cr)

Enthalpy of reaction

( • 18) +  = ( • 19)

By formula: (Cr⁺ • 18Cr) + Cr = (Cr⁺ • 19Cr)

Enthalpy of reaction

( • 19) +  = ( • 20)

By formula: (Cr⁺ • 19Cr) + Cr = (Cr⁺ • 20Cr)

Enthalpy of reaction

References

Go To: Top, Gas phase ion energetics data, Ion clustering data, Notes

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

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]

Bilodeau, Scheer, et al., 1998
Bilodeau, R.C.; Scheer, M.; Haugen, H.K., Infrared Laser Photodetachment of Transition Metal Negative Ions: Studies on Cr-, Mo-, Cu-, and Ag-, J. Phys. B: Atom. Mol. Opt. Phys., 1998, 31, 17, 3885-3891, https://doi.org/10.1088/0953-4075/31/17/013 . [all data]

Bengali, Casey, et al., 1992
Bengali, A.A.; Casey, S.M.; Cheng, C.-L.; Dick, J.P.; Fenn, T.; Villaalta, P.W.; Leopold, D.G., Negative Ion Photoelectron Spectroscopy of Coordinatively Unsaturated Group VI Metal Carbonyls: Cr(CO)3, Mo(CO)3, and W(CO)3, J. Am. Chem. Soc., 1992, 114, 13, 5257, https://doi.org/10.1021/ja00039a043 . [all data]

Feigerle, Corderman, et al., 1981
Feigerle, C.S.; Corderman, R.R.; Bobashev, S.V.; Lineberger, W.C., Binding Energies and Structure of Transition Metal Negative Ions, J. Chem. Phys., 1981, 74, 3, 1580, https://doi.org/10.1063/1.441289 . [all data]

Feldmann, Rackwitx, et al., 1977
Feldmann, D.; Rackwitx, R.; Heinicke, E.; Kaiser, H.J., Photodetachment of Some Atomic Negative Ions: P-, As-, Sb-, Te-, Cr-, Ni-, Z. Physik A., 1977, 282, 2, 143-148, https://doi.org/10.1007/BF01408156 . [all data]

Lide, 1992
Lide, D.R. (Editor), Ionization potentials of atoms and atomic ions in Handbook of Chem. and Phys., 1992, 10-211. [all data]

Sugar and Corliss, 1985
Sugar, J.; Corliss, C., Atomic energy levels of the iron period elements: Potassium through nickel, J. Phys. Chem. Ref. Data, 1985, 14. [all data]

Balducci, Gigli, et al., 1981
Balducci, G.; Gigli, G.; Guido, M., Dissociation energies of the molecules CrPO₂(g) and CoO(g) by high-temperature mass spectrometry, J. Chem. Soc. Faraday Trans. 2, 1981, 77, 1107. [all data]

Dyke, Fayad, et al., 1979
Dyke, J.M.; Fayad, N.K.; Morris, A.; Trickle, I.R., Gas-phase He I photoelectron spectra of some transition metals: Cu, Ag, Au, Cr and Mn, J. Phys. B:, 1979, 12, 2985. [all data]

Moore, 1970
Moore, C.E., Ionization potentials and ionization limits derived from the analyses of optical spectra, Natl. Stand. Ref. Data Ser., (U.S. Natl. Bur. Stand.), 1970, 34, 1. [all data]

Houriet and Vulpius, 1989
Houriet, R.; Vulpius, T., Formation of Metal Cluster Ions by Gas - Phase Ion - Molecule Reactions: the Bond Energies of Cr2+ and Mn2+, Chem. Phys. Lett., 1989, 154, 5, 454, https://doi.org/10.1016/0009-2614(89)87130-1 . [all data]

Hilpert and Ruthardt, 1987
Hilpert, K.; Ruthardt, K., Determination of the dissociation energy of the Cr₂ molecule, Ber. Bunsen-Ges. Phys. Chem., 1987, 91, 724. [all data]

Armentrout and Kickel, 1994
Armentrout, P.B.; Kickel, B.L., Gas Phase Thermochemistry of Transition Metal Ligand Systems: Reassessment of Values and Periodic Trends, in Organometallic Ion Chemistry, B. S. Freiser, ed, 1994. [all data]

Notes

Go To: Top, Gas phase ion energetics data, Ion clustering data, References

• Symbols used in this document:
  

  EA	Electron affinity
  IE (evaluated)	Recommended ionization energy
  T	Temperature
  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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