Benzaldehyde, 4-methyl-

• Formula: C₈H₈O
• Molecular weight: 120.1485
• IUPAC Standard InChI: InChI=1S/C8H8O/c1-7-2-4-8(6-9)5-3-7/h2-6H,1H3 Copy

  
• IUPAC Standard InChIKey: FXLOVSHXALFLKQ-UHFFFAOYSA-N Copy
• CAS Registry Number: 104-87-0
• 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.
• Species with the same structure:
  • Tolualdehyde
• Other names: p-Tolualdehyde; p-Formyltoluene; p-Methylbenzaldehyde; p-Toluylaldehyde; p-Tolylaldehyde; 4-Methylbenzaldehyde; 4-Tolualdehyde; Paratolualdehyde; PTAL; NSC 2224
• Information on this page:
  • Phase change data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • Gas Chromatography
  • References
  • Notes
• 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 by: Robert L. Brown and Stephen E. Stein

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: John E. Bartmess

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

C₈H₇O^- +  =

By formula: C₈H₇O^- + H⁺ = C₈H₈O

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

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

View reactions leading to C₈H₈O⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

De-protonation reactions

C₈H₇O^- +  =

By formula: C₈H₇O^- + H⁺ = C₈H₈O

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

• SOLUTION (10% IN CCl4 FOR 4000-1330 CM^-1, 10% IN CS2 FOR 1330-600 CM^-1); BECKMAN IR-7 (GRATING); DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution
• VAPOR (5 MICROLITER AT 150 C); PERKIN-ELMER 180; DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 2-3 CM^-1 cm^-1 resolution

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

• gas

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

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, Alexander N. Yermakov, Alexy A. Usov, Antonina A. Goncharova, Axlexander N. Leskin, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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Additional Data

Gas Chromatography

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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

Kovats' RI, non-polar column, isothermal

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Kovats' RI, non-polar column, custom temperature program

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Van Den Dool and Kratz RI, non-polar column, temperature ramp

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Van Den Dool and Kratz RI, polar column, temperature ramp

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Van Den Dool and Kratz RI, polar column, custom temperature program

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Normal alkane RI, non-polar column, temperature ramp

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Normal alkane RI, non-polar column, custom temperature program

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Normal alkane RI, polar column, temperature ramp

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Normal alkane RI, polar column, custom temperature program

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Lee's RI, non-polar column, custom temperature program

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References

Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Gas Chromatography, Notes

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

Aldrich Chemical Company Inc., 1990
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Pino, Marbot, et al., 2004
Pino, J.A.; Marbot, R.; Vazquez, C., Volatile components of tamarind (Tamarindus indica L.) grown in Cuba, J. Essent. Oil Res., 2004, 16, 4, 318-320, https://doi.org/10.1080/10412905.2004.9698731 . [all data]

Pino, Marbot, et al., 2004, 2
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Pino, Marbot, et al., 2003
Pino, J.; Marbot, R.; Rosado, A.; Vázquez, C., Volatile constituents of fruits of Garcinia dulcis Kurz. from Cuba, Flavour Fragr. J., 2003, 18, 4, 271-274, https://doi.org/10.1002/ffj.1187 . [all data]

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Xu, X.; van Stee, L.L.P.; Williams, J.; Beens, J.; Adahchour, M.; Vreuls, R.J.J.; Brinkman, U.A.Th.; Lelieveld, J., Comprehensive two-dimensional gas chromatography (GC×GC) measurements of volatile organic compounds in the atmosphere, Atmos. Chem. Phys., 2003, 3, 3, 665-682, https://doi.org/10.5194/acp-3-665-2003 . [all data]

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Chung, Yung, et al., 2001
Chung, H.Y.; Yung, I.K.S.; Kim, J.-S., Comparison of volatile components in dried scallops (Chlamys farreri and Patinopecten yessoensis) prepared by boiling and steaming methods, J. Agric. Food Chem., 2001, 49, 1, 192-202, https://doi.org/10.1021/jf000692a . [all data]

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Alasalvar, C.; Shahidi, F.; Cadwallader, K.R., Comparison of natural and roasted Turkish Tombul hazelnut (Corylus avellana L.) volatiles and flavor by DHA/GC/MS and descriptive sensory analysis, J. Agric. Food Chem., 2003, 51, 17, 5067-5072, https://doi.org/10.1021/jf0300846 . [all data]

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Radulovic, N.; Blagojevic, P.; Palic, R., Comparative study of the leaf volatiles of Arctostaphylos uva-ursi (L.) Spreng. and Vaccinium vitis-idaea L. (Ericaceae), Molecules, 2010, 15, 9, 6168-6185, https://doi.org/10.3390/molecules15096168 . [all data]

Bendimerad and Bendiab, 2005
Bendimerad, N.; Bendiab, S.A.T., Composition and antibacterial activity of Pseudocytisus integrifolius (Salisb.) essential oil from Algeria, J. Agric. Food Chem., 2005, 53, 8, 2947-2952, https://doi.org/10.1021/jf047937u . [all data]

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Notes

Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Gas Chromatography, References

• Symbols used in this document:
  

  EA	Electron affinity
  Tboil	Boiling point
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

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