Benzaldehyde, 4-hydroxy-

• Formula: C₇H₆O₂
• Molecular weight: 122.1213
• IUPAC Standard InChI: InChI=1S/C7H6O2/c8-5-6-1-3-7(9)4-2-6/h1-5,9H Copy

  
• IUPAC Standard InChIKey: RGHHSNMVTDWUBI-UHFFFAOYSA-N Copy
• CAS Registry Number: 123-08-0
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Benzaldehyde, p-hydroxy-; p-Formylphenol; p-Hydroxybenzaldehyde; p-Oxybenzaldehyde; 4-Formylphenol; 4-Hydroxybenzaldehyde; Parahydroxybenzaldehyde; USAF M-6; 4-Hydroxybenzenecarbonal; NSC 2127
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• Information on this page:
  • Phase change data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • UV/Visible spectrum
  • References
  • Notes
• Other data available:
  • Henry's Law data
  • Mass spectrum (electron ionization)
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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:
AC - William E. Acree, Jr., James S. Chickos

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

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 as indicated in comments:
B - John E. Bartmess
M - 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. 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

 +  = ( • )

By formula: Br^- + C₇H₆O₂ = (Br^- • C₇H₆O₂)

Free energy of reaction

C₇H₅O₂^- +  =

By formula: C₇H₅O₂^- + H⁺ = C₇H₆O₂

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:
B - John E. Bartmess
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

De-protonation reactions

C₇H₅O₂^- +  =

By formula: C₇H₅O₂^- + H⁺ = C₇H₆O₂

Ion clustering 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:
B - John E. Bartmess
M - 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: Br^- + C₇H₆O₂ = (Br^- • C₇H₆O₂)

Free energy of reaction

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

• SOLID (NUJOL MULL); Not specified, most likely a prism, grating, or hybrid spectrometer.; DIGITIZED BY NIST FROM HARD COPY; 4 cm^-1 resolution
• SOLID (SPLIT MULL, FLUOROLUBE FOR 3800-1300 AND NUJOL FOR 1300-250 CM ^-1); PERKIN-ELMER 521 (GRATING); DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

• gas

UV/Visible 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: Victor Talrose, Eugeny B. Stern, Antonina A. Goncharova, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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Additional Data

References

Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, UV/Visible spectrum, Notes

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

Ribeiro da Silva, Gonçalves, et al., 2010
Ribeiro da Silva, Maria D.M.C.; Gonçalves, Mariana V.; Monte, Manuel J.S., Thermodynamic study on hydroxybenzaldehyde derivatives: 3- and 4-Hydroxybenzaldehyde isomers and 3,5-di-tert-butyl-2-hydroxybenzaldehyde, The Journal of Chemical Thermodynamics, 2010, 42, 4, 472-477, https://doi.org/10.1016/j.jct.2009.10.009 . [all data]

Bernardes and Minas da Piedade, 2008
Bernardes, Carlos E.S.; Minas da Piedade, Manuel E., Energetics of the O-H Bond and of Intramolecular Hydrogen Bonding in HOC ₆ H ₄ C(O)Y (Y = H, CH ₃ , CH ₂ CH«58875»CH ₂ , C«58876»CH, CH ₂ F, NH ₂ , NHCH ₃ , NO ₂ , OH, OCH ₃ , OCN, CN, F, Cl, SH, and SCH ₃ ) Compounds, J. Phys. Chem. A, 2008, 112, 40, 10029-10039, https://doi.org/10.1021/jp804455u . [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Parsons, Rochester, et al., 1971
Parsons, G.H.; Rochester, C.H.; Wood, C.E.C., Effect of 4-substitution on the thermodynamics of hydration of phenol and the phenoxide anion, J. Chem. Soc., B:, 1971, 533, https://doi.org/10.1039/j29710000533 . [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]

Aihara, 1960
Aihara, Ariyuki, Estimation of the Energy of Hydrogen Bonds Formed in Crystals. II. Phenols, Bull. Chem. Soc. Jpn., 1960, 33, 2, 194-200, https://doi.org/10.1246/bcsj.33.194 . [all data]

Temprado, Roux, et al., 2008
Temprado, M.; Roux, María Victoria; Chickos, J.S., Some thermophysical properties of several solid aldehydes, J Therm Anal Calorim, 2008, 94, 1, 257-262, https://doi.org/10.1007/s10973-007-8883-0 . [all data]

Paul and Kebarle, 1990
Paul, G.J.C.; Kebarle, P., Stabilities in the Gas Phase of the Hydrogen Bonded Complexes, YC6H4OH-X-, of Substituted Phenols, YC6H4OH, with the Halide Anions X-(Cl-, Br-), Can. J. Chem., 1990, 68, 11, 2070, https://doi.org/10.1139/v90-316 . [all data]

Fujio, McIver, et al., 1981
Fujio, M.; McIver, R.T., Jr.; Taft, R.W., Effects on the acidities of phenols from specific substituent-solvent interactions. Inherent substituent parameters from gas phase acidities, J. Am. Chem. Soc., 1981, 103, 4017. [all data]

Foffani, Pignataro, et al., 1964
Foffani, A.; Pignataro, S.; Cantone, B.; Grasso, F., Ionization potentials and substituent effects for aromatic carbonyl compounds, Z. Physik. Chem. (Frankfurt), 1964, 42, 221. [all data]

Grammaticakis, 1953
Grammaticakis, P., Contribution a l'etude de l'absorption dans l'U.-V. moyen et le visible de quelques aldehydes et cetones aromatiques ainsi que de certains de leurs derives fonctionnels, (Premier memoire), Bull. Soc. Chim. Fr., 1953, 20, 821-826. [all data]

Notes

Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, UV/Visible spectrum, References

• Symbols used in this document:
  

  T	Temperature
  ΔfusH	Enthalpy of fusion
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions
  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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