p-Benzoquinone, 2,3,5,6-tetrachloro-

• Formula: C₆Cl₄O₂
• Molecular weight: 245.875
• IUPAC Standard InChI: InChI=1S/C6Cl4O2/c7-1-2(8)6(12)4(10)3(9)5(1)11 Copy

  
• IUPAC Standard InChIKey: UGNWTBMOAKPKBL-UHFFFAOYSA-N Copy
• CAS Registry Number: 118-75-2
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Other names: p-Chloranil; 2,5-Cyclohexadiene-1,4-dione, 2,3,5,6-tetrachloro-; α-Chloranil; Chloranil; Coversan; Dow Seed Disinfectant No. 5; ENT 3,797; Khloranil; Psorisan; Quinone Tetrachloride; Reranil; Spergon; Spergon I; Spergon Technical; Tetrachloro-p-benzoquinone; Tetrachloro-p-quinone; Tetrachloro-1,4-benzoquinone; Tetrachlorobenzoquinone; Tetrachloroquinone; Vulklor; 2,3,5,6-Tetrachloro-p-benzoquinone; 2,3,5,6-Tetrachloro-1,4-benzoquinone; 2,3,5,6-Tetrachlorobenzoquinone; 2,3,5,6-Tetrachloroquinone; 2,3,5,6-Tetrachloro-2,5-cyclohexadiene-1,4-dione; G-444E; G-25804; Geigy-444e; Tetrachloroparabenzoquinone; 1,4-Benzoquinone, 2,3,5,6-tetrachloro-; Tetrachlorquinone; ENT 3797; NSC 8432
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• Information on this page:
  • Phase change data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Gas phase ion energetics data
  • UV/Visible spectrum
• Data at other public NIST sites:
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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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
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (atm)
    T = temperature (K)

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Enthalpy of sublimation

Enthalpy of fusion

Enthalpy of phase transition

Entropy of phase transition

IR Spectrum

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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: Coblentz Society, Inc.

Condensed Phase Spectrum

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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

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, Phase change data, IR Spectrum, 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.

Donnelly, Drewes, et al., 1990
Donnelly, J.R.; Drewes, L.A.; Johnson, R.L.; Munslow, W.D.; Knapp, K.K.; Sovocool, G.W., Purity and heat of fusion data for environmental standards as determined by differential scanning calorimetry, Thermochim. Acta, 1990, 167, 2, 155, https://doi.org/10.1016/0040-6031(90)80476-F . [all data]

Coolidge and Coolidge, 1927
Coolidge, A.S.; Coolidge, M.S., The sublimation pressures of substituted quinones and hydroquinones, J. Am. Chem. Soc., 1927, 49, 100-104. [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Jones, 1960
Jones, A.H., Sublimation Pressure Data for Organic Compounds., J. Chem. Eng. Data, 1960, 5, 2, 196-200, https://doi.org/10.1021/je60006a019 . [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press Inc., London, 1970, 643. [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]

Chihara and Masukane, 1973
Chihara, H.; Masukane, K., Heat capacity of solid tetrachloro-p-benzoquinone(chloranil) between 11 and 300K. Phase transitions at 92K, J. Chem. Phys., 1973, 59, 5397-5403. [all data]

Notes

Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  Tfus	Fusion (melting) point
  ΔHtrs	Enthalpy of phase transition
  ΔStrs	Entropy of phase transition
  ΔfusH	Enthalpy of fusion
  ΔsubH	Enthalpy of sublimation
  ΔsubH°	Enthalpy of sublimation at standard conditions
  ΔvapH	Enthalpy of vaporization

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