bis(η⁵-Cyclopentadienyl) chromium

• Formula: C₁₀H₁₀Cr
• Molecular weight: 182.1825
• IUPAC Standard InChI: InChI=1S/2C5H5.Cr/c2*1-2-4-5-3-1;/h2*1-5H; Copy

  
• IUPAC Standard InChIKey: OXPNGPODCRFNTM-UHFFFAOYSA-N Copy
• CAS Registry Number: 1271-24-5
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: Chromocene; bis(η5-cyclopenta-2,4-dien-1-yl)chromium
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Mass spectrum (electron ionization)
  • References
  • Notes
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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: José A. Martinho Simões

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:
MS - José A. Martinho Simões
DH - Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of solid

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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
MS - José A. Martinho Simões
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Temperature of phase transition

Enthalpy of phase transition

Entropy of phase transition

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: José A. Martinho Simões

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

 (solution) +  (solution) = C₁₁H₁₀CrO (solution)

By formula: C₁₀H₁₀Cr (solution) + CO (solution) = C₁₁H₁₀CrO (solution)

Gas phase ion energetics 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:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C₁₀H₁₀Cr⁺ (ion structure unspecified)

Ionization energy determinations

Appearance energy determinations

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

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics 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.

Martinho Simões
Martinho Simões, J.A., Private communication (see http://webbook.nist.gov/chemistry/om/). [all data]

Chipperfield, Sneyd, et al., 1979
Chipperfield, J.R.; Sneyd, J.C.R.; Webster, D.E., J. Organometal. Chem., 1979, 178, 177. [all data]

Tel'noi, Kirynov, et al., 1975
Tel'noi, V.I.; Kirynov, K.V.; Ermolaev, V.I.; Rabinovich, I.B., Dokl. Akad. Nauk SSSR, 1975, 220, 1088. [all data]

Pedley and Rylance, 1977
Pedley, J.B.; Rylance, J., Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex, Brigton, 1977. [all data]

Tel'noi and Rabinovich, 1977
Tel'noi, V.I.; Rabinovich, I.B., Russ. Chem. Rev., 1977, 46, 689. [all data]

Rabinovich, Nistratov, et al., 1978
Rabinovich, I.B.; Nistratov, V.P.; Sheiman, M.S.; Burchalova, G.V., Heat capacities of dicyclopentadienyl compounds of vanadium, chromium, manganese, cobalt, and nickel, J. Chem. Thermodynam., 1978, 10, 523-536. [all data]

Rabinovich, Nistratov, et al., 1975
Rabinovich, I.B.; Nistratov, V.P.; Sheiman, M.S.; Burchalova, G.V., Heat capacity and transitions in solid state. Dicyclopentadienyl compounds of transition elements,Quatrieme Conference International de Thermodynamique Chimique II, Thermophysiques (capacites thermiques) pp., 1975, 69-76, 136. [all data]

Chhor, Pommier, et al., 1984
Chhor, K.; Pommier, C.; Diot, M., Low-temperature thermodynamic study of the stable and metastable phases of (C₄H₄N)Fe(C₅H₅) (C₄H₄P)Fe(C₅H₅), and (C₅H₅)₂ Cr crystals, J. Chem. Thermodynam., 1984, 16, 503-517. [all data]

Baev, Barkatin, et al., 1979
Baev, A.K.; Barkatin, A.A.; Gubin, S.P.; Dyagileva, S.P., Thermodynamics of phase transitions and vapor state of some compounds of elements with incomplete d-shells in Vses. Konf. po Kalorimetrii i Khim. Termodinamike, 8th, Ivanovo, p 386-389, 1979. [all data]

Baev, Barkatin, et al., 1984
Baev, A.K.; Barkatin, A.A.; Dargileva, L.M., Vesti Akad. Navuk BSSR, Ser. Khim. Navuk, 1984, 60.. [all data]

Pilcher and Skinner, 1982
Pilcher, G.; Skinner, H.A., In The Chemistry of the Metal-Carbon Bond Wiley: New York, Hartley, F. R.; Patai, S., ed(s)., 1982. [all data]

Baev, Barkatin, et al., 1984, 2
Baev, A.K.; Barkatin, A.A.; Dyagileva, L.M., Vestsi Akad. Navuk BSSR Ser. Khim. Navuk, 1984, 60. [all data]

Pilcher and Skinner, 1983
Pilcher, G.; Skinner, H.A., Thermochemistry of organometallic compounds, 1983, 43-90, https://doi.org/10.1002/9780470771686.ch2 . [all data]

Pommier and Azokpota, 1976
Pommier, C.; Azokpota, C., Study of phase transitions in metallocenes by determining specific heat curves, J. Calorim. Anal. Therm. [C.R.], 1976, 3-6, 1-8. [all data]

Wong and Brintzinger, 1975
Wong, K.L.T.; Brintzinger, H.H., J. Am. Chem. Soc., 1975, 97, 5143. [all data]

Rabalais, Werme, et al., 1972
Rabalais, J.W.; Werme, L.O.; Bergmark, T.; Karlsson, L.; Hussain, M.; Siegbahn, K., Electron spectroscopy of open-shell systems: spectra of Ni(C₅H₅)₂, Fe(C₅H₅)₂, Mn(C₅H₅)₂, and Cr(C₅H₅)_Å2, J. Chem. Phys., 1972, 57, 1185. [all data]

Muller and D'Or, 1967
Muller, J.; D'Or, L., Massenspektrometrische Untersuchungen an Dicyclopentadienylkomplexen von Ubergangsmetallen, J.Organometal. Chem., 1967, 10, 313. [all data]

Cauletti, Green, et al., 1980
Cauletti, C.; Green, J.C.; Kelly, M.R.; Powell, P.; Van Tilborg, J., Photoelectron spectra of metallocenes, J. Electron Spectrosc. Relat. Phenom., 1980, 19, 327. [all data]

Evans, Green, et al., 1974
Evans, S.; Green, M.L.H.; Jewitt, B.; King, G.H.; Orchard, A.F., Electronic structures of metal complexes containing the π-cyclopentadienyl and related ligands Part 2. He I photoelectron spectra of the open-shell metallocenes, J. Chem. Soc. Faraday Trans. 2, 1974, 70, 356. [all data]

Notes

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• Symbols used in this document:
  

  AE	Appearance energy
  Cp,solid	Constant pressure heat capacity of solid
  S°solid,1 bar	Entropy of solid at standard conditions (1 bar)
  Tfus	Fusion (melting) point
  Ttrs	Temperature of phase transition
  ΔHtrs	Enthalpy of phase transition
  ΔStrs	Entropy of phase transition
  ΔcH°solid	Enthalpy of combustion of solid at standard conditions
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°solid	Enthalpy of formation of solid at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions
  ΔsubH°	Enthalpy of sublimation at standard conditions
  ΔvapH	Enthalpy of vaporization

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