2-Pentenal, 2-methyl-

• Formula: C₆H₁₀O
• Molecular weight: 98.1430
• IUPAC Standard InChI: InChI=1S/C6H10O/c1-3-4-6(2)5-7/h4-5H,3H2,1-2H3 Copy

  
• IUPAC Standard InChIKey: IDEYZABHVQLHAF-UHFFFAOYSA-N Copy
• CAS Registry Number: 623-36-9
• 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.
• Stereoisomers:
  • 2-methyl-(E)-2-pentenal
• Other names: α-Methyl-β-ethylacrolein; β-Ethyl-α-methylacrolein; 2-Methyl-2-pentenal; 2-Methyl-3-ethylacrolein; CH3CH2CH=C(CH3)CHO; 2-Methyl-2-pentenoic aldehyde; 2-Methyl-2-penten-1-al; 2-Methyl-2-pentene-1-al; 2-Methylpent-2-enal; NSC 9464; 2-Methylpentenal; (Z)-2-Methylpent-2-enal
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• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Gas Chromatography
  • References
  • Notes
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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 by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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
BS - Robert L. Brown and Stephen E. Stein

Reduced pressure boiling point

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

View reactions leading to C₆H₁₀O⁺ (ion structure unspecified)

Ionization energy determinations

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

• LIQUID; Not specified, most likely a prism, grating, or hybrid spectrometer.; DIGITIZED BY NIST FROM HARD COPY; 4 cm^-1 resolution

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

• gas; HP-GC/MS/IRD

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

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, 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, non-polar column, custom temperature program

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

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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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References

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

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

Clopatt, 1932
Clopatt, J.A., Eine neue Methode zur Bestimmung der Verbrennungswarme fluchtiger Stoffe, Soc. Scient. Fenn. Commentat. Phys. Math., 1932, 6, 1-15. [all data]

Komarewsky and Kritchevsky, 1943
Komarewsky, V.I.; Kritchevsky, T.H., Synthesis of Olefin Hydrocarbons by Catalytic Condensation and Dehydration of Aliphatic Aldehydes, J. Am. Chem. Soc., 1943, 65, 547-8. [all data]

Anonymous, 1955
Anonymous, R., , Am. Pet. Inst. Res. Proj. 45, Tech. Rep. 14, No. 1, Ohio State Univ., 1955. [all data]

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

Masclet and Mouvier, 1978
Masclet, P.; Mouvier, G., Etude par spectrometrie photoelectronique d'aldehydes et de cetones ethyleniques conjugues, J. Electron Spectrosc. Relat. Phenom., 1978, 14, 77. [all data]

Garruti, Franco, et al., 2001
Garruti, D.S.; Franco, M.R.B.; da Silva, M.A.A.A.P.; Janzantti, N.S.; Alves, G.L., Compostos voláteis do sabor de pseudofrutos de cajueiro anão precoce (Anacardium occidentale L.) CCP-76, Boletim de Pesquisa e Desenvolvimento 4, Empresa Brasileira de Pesquisa Agropecuária, Fortaleza, Brazil, 2001, 29, retrieved from http://www.cnpat.embrapa.br/publica/pub/BolPesq/pd₄.pdf. [all data]

Misharina and Golovnya, 1996
Misharina, T.A.; Golovnya, R.V., Study of the composition of volatiles in raw and processed sardine by gas chromatography and gas chromatography-mass spectrometry, Zh. Anal. Khim., 1996, 51, 7, 791-795. [all data]

Farkas, Hradský, et al., 1992
Farkas, P.; Hradský, P.; Kovác, M., Novel flavour components identified in the steamn distillate of onion (Allium cepa L.), Z. Lebensm. Unters. Forsch., 1992, 195, 5, 459-462, https://doi.org/10.1007/BF01191718 . [all data]

Kuo and Ho, 1992
Kuo, M.-C.; Ho, C.-T., Volatile constituents of the solvent extracts of Welsh onions (Allium fistulosum L. variety Maichuon) and scallions (A. fistulosum L. variety caepitosum), J. Agric. Food Chem., 1992, 40, 10, 1906-1910, https://doi.org/10.1021/jf00022a036 . [all data]

Schreyen, Dirinck, et al., 1976
Schreyen, L.; Dirinck, P.; van Wassenhove, F.; Schamp, N., Analysis of leek volatiles by headspace condensation, J. Agric. Food Chem., 1976, 24, 6, 1147-1152, https://doi.org/10.1021/jf60208a023 . [all data]

Schreyen, Dirinck, et al., 1976, 2
Schreyen, L.; Dirinck, P.; van Wassenhove, F.; Schamp, N., Volatile flavor components of leek, J. Agric. Food Chem., 1976, 24, 2, 336-341, https://doi.org/10.1021/jf60204a056 . [all data]

Andriamaharavo, 2014
Andriamaharavo, N.R., Retention Data. NIST Mass Spectrometry Data Center., NIST Mass Spectrometry Data Center, 2014. [all data]

Quijano, Linares, et al., 2007
Quijano, C.E.; Linares, D.; Pino, J.A., Changes in volatile compounds of fermented cereza agria [Phyllanthus acidus (L.) Skeels] fruit, Flavour Fragr. J., 2007, 22, 5, 392-394, https://doi.org/10.1002/ffj.1810 . [all data]

Elmore, Nisyrios, et al., 2005
Elmore, J.S.; Nisyrios, I.; Mottram, D.S., Analysis of the headspace aroma compounds of walnuts (Juglans regia L.), Flavour Fragr. J., 2005, 20, 5, 501-506, https://doi.org/10.1002/ffj.1477 . [all data]

Chung, Yung, et al., 2002
Chung, H.-Y.; Yung, I.K.S.; Ma, W.C.J.; Kim, J.-S., Analysis of volatile components in frozen and dried scallops (Patinopecten yessoensis) by gas chromatography/mass spectrometry, Food Res. Int., 2002, 35, 1, 43-53, https://doi.org/10.1016/S0963-9969(01)00107-7 . [all data]

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]

Schulz, Krüger, et al., 1998
Schulz, H.; Krüger, H.; Liebmann, J.; Peterka, H., Distribution of volatile sulfur compounds in an interspecific hybrid between onion (Allium cepa L.) and leek (Allium porrum L.), J. Agric. Food Chem., 1998, 46, 12, 5220-5224, https://doi.org/10.1021/jf9806208 . [all data]

Chung and Cadwallader, 1993
Chung, H.Y.; Cadwallader, K.R., Volatile components in blue crab (Callinectes sapidus) meat and processing by-product, J. Food Sci., 1993, 58, 6, 1203-1207, https://doi.org/10.1111/j.1365-2621.1993.tb06148.x . [all data]

Bellesia, Pinetti, et al., 2001
Bellesia, F.; Pinetti, A.; Tirillini, B.; Bianchi, A., Temperature-dependent evolution of volatile organic compounds in Tuber borchii from Italy, Flavour Fragr. J., 2001, 16, 1, 1-6, https://doi.org/10.1002/1099-1026(200101/02)16:1<1::AID-FFJ936>3.0.CO;2-Y . [all data]

Kubec, Drhová, et al., 1999
Kubec, R.; Drhová, V.; Velísek, J., Volatile compounds thermally generated from S-propylcysteine and S-propylcysteine sulfoxide - aroma precursors of Allium vegetables, J. Agric. Food Chem., 1999, 47, 3, 1132-1138, https://doi.org/10.1021/jf980974z . [all data]

Bellesia, Pinetti, et al., 1996
Bellesia, F.; Pinetti, A.; Bianchi, A.; Tirillini, B., Volatile compounds of the white truffle (Tuber magnaturn Pico) from middle Italy, Flavour Fragr. J., 1996, 11, 4, 239-243, https://doi.org/10.1002/(SICI)1099-1026(199607)11:4<239::AID-FFJ573>3.0.CO;2-A . [all data]

Binder, Benson, et al., 1990
Binder, R.G.; Benson, M.E.; Flath, R.A., Volatile Components of Safflower, J. Agric. Food Chem., 1990, 38, 5, 1245-1248, https://doi.org/10.1021/jf00095a020 . [all data]

Binder, Turner, et al., 1990
Binder, R.G.; Turner, C.E.; Flath, R.A., Volatile components of purple starthistle, J. Agric. Food Chem., 1990, 38, 4, 1053-1055, https://doi.org/10.1021/jf00094a030 . [all data]

Binder, Flath, et al., 1989
Binder, R.G.; Flath, R.A.; Mon, T.R., Volatile components of bittermelon, J. Agric. Food Chem., 1989, 37, 2, 418-420, https://doi.org/10.1021/jf00086a032 . [all data]

Buttery and Ling, 1985
Buttery, R.G.; Ling, L.C., Volatile components of corn roots: possible insect attractants, J. Agric. Food Chem., 1985, 33, 4, 772-774, https://doi.org/10.1021/jf00064a054 . [all data]

Buttery, Xu, et al., 1985
Buttery, R.G.; Xu, C.; Ling, L.C., Volatile components of wheat leaves (and stems): Possible insect attractants, J. Agric. Food Chem., 1985, 33, 1, 115-117, https://doi.org/10.1021/jf00061a033 . [all data]

Lorenz, Stern, et al., 1983
Lorenz, G.; Stern, D.J.; Flath, R.A.; Haddon, W.F.; Tillin, S.J.; Teranishi, R., Identification of sheep liver volatiles, J. Agric. Food Chem., 1983, 31, 5, 1052-1057, https://doi.org/10.1021/jf00119a033 . [all data]

Rotsatschakul, Visesanguan, et al., 2009
Rotsatschakul, P.; Visesanguan, W.; Smitinont, T.; Chaiseri, S., Changes in volatile compounds during fermentation of nham (Thai fermented sausage), Int. Food Res. J., 2009, 16, 391-414. [all data]

Splivallo, Bossi, et al., 2007
Splivallo, R.; Bossi, S.; Maffei, M.; Bonfante, P., Discrimination of truffle fruiting body versus mycelial aromas by stir bar sorptive extraction, Phytochemistry, 2007, 68, 20, 2584-2598, https://doi.org/10.1016/j.phytochem.2007.03.030 . [all data]

Robert, Héritier, et al., 2004
Robert, F.; Héritier, J.; Quiquerez, J.; Simian, H.; Blank, I., Synthesis and sensorial properties of 2-alkylalk-2-enals and 3-(acetylthio)-2-alkyl alkanals, J. Agric. Food Chem., 2004, 52, 11, 3525-3529, https://doi.org/10.1021/jf0498968 . [all data]

Vinogradov, 2004
Vinogradov, B.A., Production, composition, properties and application of essential oils, 2004, retrieved from http://viness.narod.ru. [all data]

Kurose and Yatagai, 2005
Kurose, K.; Yatagai, M., Components of the essential oils of Azadirachta indica A. Juss, Azadirachta siamensis Velton, and Azadirachta excelsa (Jack) Jacobs and their comparison, J. Wood Sci., 2005, 51, 2, 185-188, https://doi.org/10.1007/s10086-004-0640-4 . [all data]

Chyau and Mau, 2001
Chyau, C.-C.; Mau, J.-L., Effects of various oils on volatile compounds of deep-fried shallot flavouring, Food Chem., 2001, 74, 1, 41-46, https://doi.org/10.1016/S0308-8146(00)00336-8 . [all data]

Umano, Nakahara, et al., 1999
Umano, K.; Nakahara, K.; Shoji, A.; Shibamoto, T., Aroma chemicals isolated and identified from leaves of aloe arborescens Mill. Var. natalensis Berger, J. Agric. Food Chem., 1999, 47, 9, 3702-3705, https://doi.org/10.1021/jf990116i . [all data]

Chyau, Lin, et al., 1997
Chyau, C.-C.; Lin, Y.-C.; Mau, J.-L., Storage stability of deep-fried shallot flavoring, J. Agric. Food Chem., 1997, 45, 8, 3211-3215, https://doi.org/10.1021/jf970109z . [all data]

Kawakami and Kobayashi, 1991
Kawakami, M.; Kobayashi, A., Volatitle constituents of greem mate and roasted mate, J. Agric. Food Chem., 1991, 39, 7, 1275-1279, https://doi.org/10.1021/jf00007a016 . [all data]

Buttery and Ling, 1984
Buttery, R.G.; Ling, L.C., Corn leaf volatiles: identification using Tenax trapping for possible insect attractants, J. Agric. Food Chem., 1984, 32, 5, 1104-1106, https://doi.org/10.1021/jf00125a044 . [all data]

Gyawalia, Seo, et al., 2006
Gyawalia, R.; Seo, H.-Y.; Lee, H.-J.; Song, H.-P.; Kim, D.-H.; Byun, M.-W.; Kim, K.-S., Effect of γ-irradiation on volatile compounds of dried Welsh onion (Allium fistulosum L.), Radiat. Phys. Chem., 2006, 75, 2, 322-328, https://doi.org/10.1016/j.radphyschem.2005.07.001 . [all data]

Garruti, Franco, et al., 2003
Garruti, D.S.; Franco, M.R.B.; da Silva, M.A.A.P.; Janzantti, N.S.; Alves, G.L., Evaluation of volatile flavour compounds from cashew apple (Anacardium occidentale L) juice by the Osme gas chromatography/olfactometry technique, J. Sci. Food Agric., 2003, 83, 14, 1455-1462, https://doi.org/10.1002/jsfa.1560 . [all data]

Notes

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• Symbols used in this document:
  

  Tboil	Boiling point
  Tfus	Fusion (melting) point
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions

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