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Thiophene, 2,4-dimethyl-


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: William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
9.89338.AStephenson and Malanowski, 1987Based on data from 323. - 493. K. See also Dykyj, 1972 and Dykyj, Svoboda, et al., 1999.

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

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Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
NIST MS number 1676

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Gas Chromatography

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

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

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

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Column type Active phase I Reference Comment
CapillaryBPX-5882.Ames, Guy, et al., 200150. m/0.32 mm/0.5 «mu»m, He, 60. C @ 5. min, 4. K/min, 250. C @ 10. min
CapillaryBP-5875.Whitfield and Mottram, 20014. K/min; Column length: 50. m; Column diameter: 0.32 mm; Tstart: 60. C; Tend: 250. C
CapillaryUltra-1855.8Farkas, Hradský, et al., 199225. m/0.2 mm/0.33 «mu»m, H2, 2. K/min; Tstart: 60. C; Tend: 230. C
CapillaryHP-1860.Kuo and Ho, 199250. m/0.32 mm/1.05 «mu»m, He, 2. K/min; Tstart: 40. C; Tend: 260. C
CapillaryHP-1880.Kuo and Ho, 1992, 250. m/0.32 mm/1.05 «mu»m, He, 2. K/min; Tstart: 40. C; Tend: 260. C

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

View large format table.

Column type Active phase I Reference Comment
CapillaryFFAP1244.Calvo-Gómez, Morales-López, et al., 200430. m/0.25 mm/0.25 «mu»m, He, 40. C @ 3. min, 5. K/min; Tend: 220. C
CapillaryDB-Wax1253.Nielsen, Larsen, et al., 200430. m/0.25 mm/0.25 «mu»m, He, 45. C @ 10. min, 6. K/min, 240. C @ 30. min
CapillaryDB-Wax1240.Nielsen and Poll, 200430. m/0.25 mm/0.25 «mu»m, He, 45. C @ 10. min, 3. K/min, 240. C @ 30. min
CapillaryDB-Wax1197.Nielsen, Larsen, et al., 200330. m/0.25 mm/0.25 «mu»m, He, 40. C @ 10. min, 6. K/min, 240. C @ 30. min
CapillaryCP-WAX 57CB1181.Whitfield, Mottram, et al., 1988He, 60. C @ 5. min, 4. K/min, 200. C @ 10. min; Column length: 50. m; Column diameter: 0.32 mm

Normal alkane RI, non-polar column, temperature ramp

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Column type Active phase I Reference Comment
CapillaryPONA862.Yang, Wang, et al., 200450. m/0.20 mm/0.50 «mu»m, N2, 2. K/min; Tstart: 35. C; Tend: 170. C
CapillaryPONA857.Yang, Wang, et al., 200350. m/0.20 mm/0.50 «mu»m, 2. K/min; Tstart: 30. C; Tend: 150. C
CapillaryHP-5885.Kubec, Drhová, et al., 199930. m/0.25 mm/0.25 «mu»m, N2, 40. C @ 3. min, 4. K/min, 240. C @ 10. min
CapillaryHP-5878.Kubec, Velísek, et al., 199730. m/0.25 mm/0.25 «mu»m, N2, 40. C @ 3. min, 4. K/min, 240. C @ 10. min
CapillaryCP-Sil 5859.Damste, van Dalen, et al., 198825. m/0.32 mm/0.45 «mu»m, Helium, 0. C @ 5. min, 3. K/min; Tend: 300. C
CapillaryCP-Sil 5859.Damste, van Dalen, et al., 198825. m/0.32 mm/0.45 «mu»m, Helium, 0. C @ 5. min, 3. K/min; Tend: 300. C
CapillaryCP Sil 5 CB859.Damste, Kock-van Dalen, et al., 198825. m/0.32 mm/0.45 «mu»m, He, 3. K/min; Tstart: 50. C; Tend: 300. C
CapillaryCP Sil 5 CB859.Damste, Kock-van Dalen, et al., 198825. m/0.32 mm/0.45 «mu»m, He, 3. K/min; Tstart: 50. C; Tend: 300. C

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

View large format table.

Column type Active phase I Reference Comment
CapillaryHP-5903.Rotsatschakul, Visesanguan, et al., 200960. m/0.25 mm/0.25 «mu»m, Helium; Program: 30 0C (2 min) 2 0Cmin -> 60 0C 10 0C/min -> 100 0C 20 0C/min -> 140 0C 10 0C/min -> 200 0C (10 min)
CapillaryHP-5 MS863.Pyun and Shin, 200630. m/0.25 mm/0.25 «mu»m; Program: 40 0C (3 min) 2 0C/min -> 150 0C 20 0C/min -> 220 0C (5 min)
CapillaryPONA860.Yang, Wang, et al., 200350. m/0.20 mm/0.50 «mu»m; Program: not specified

Normal alkane RI, polar column, temperature ramp

View large format table.

Column type Active phase I Reference Comment
CapillaryHP-Innowax1190.Kubec, Drhová, et al., 199930. m/0.25 mm/0.25 «mu»m, He, 40. C @ 3. min, 4. K/min, 190. C @ 10. min
CapillaryHP-Innowax1231.Kubec, Velísek, et al., 199730. m/0.25 mm/0.5 «mu»m, N2, 40. C @ 3. min, 4. K/min; Tend: 190. C
CapillaryCarbowax 20M1194.Shibamoto and Russell, 19771. K/min; Column length: 100. m; Column diameter: 0.25 mm; Tstart: 70. C; Tend: 170. C
CapillaryCarbowax 20M1197.Shibamoto and Russell, 19771. K/min; Column length: 100. m; Column diameter: 0.25 mm; Tstart: 70. C; Tend: 170. C
CapillaryCarbowax 20M1194.Shibamoto and Russell, 1976N2, 1. K/min; Column length: 100. m; Column diameter: 0.25 mm; Tstart: 70. C; Tend: 170. C
CapillaryCarbowax 20M1197.Shibamoto and Russell, 1976N2, 1. K/min; Column length: 100. m; Column diameter: 0.25 mm; Tstart: 70. C; Tend: 170. C

Normal alkane RI, polar column, custom temperature program

View large format table.

Column type Active phase I Reference Comment
CapillaryDB-Wax1250.Gyawalia, Seo, et al., 200660. m/0.2 mm/0.25 «mu»m, He; Program: 40C(3min) => 2C/min => 150C => 4C/min => 220C(20min) => 5C/min => 230C
CapillarySupelcowax-101230.Jung, Kim, et al., 2001Program: not specified

References

Go To: Top, Phase change data, 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.

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]

Dykyj, 1972
Dykyj, J., Petrochemia, 1972, 12, 1, 13. [all data]

Dykyj, Svoboda, et al., 1999
Dykyj, J.; Svoboda, J.; Wilhoit, R.C.; Frenkel, M.L.; Hall, K.R., Vapor Pressure of Chemicals: Part A. Vapor Pressure and Antoine Constants for Hydrocarbons and Sulfur, Selenium, Tellurium and Hydrogen Containing Organic Compounds, Springer, Berlin, 1999, 373. [all data]

Ames, Guy, et al., 2001
Ames, J.M.; Guy, R.C.E.; Kipping, G.J., Effect of pH and temperature on the formation of volatile compounds in cysteine/reducing sugar/starch mixtures during extrusion cooking, J. Agric. Food Chem., 2001, 49, 4, 1885-1894, https://doi.org/10.1021/jf0012547 . [all data]

Whitfield and Mottram, 2001
Whitfield, F.B.; Mottram, D.S., Heterocyclic volatiles formed by heating cysteine or hydrogen sulfide with 4-hydroxy-5-methyl-3(2H)-furanone at pH 6.5, J. Agric. Food Chem., 2001, 49, 2, 816-822, https://doi.org/10.1021/jf0008644 . [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 distilled oils of Welsh onions (Allium fistulosum L. variety Maichuon) and scallions (Allium fistulosum L. variety Caespitosum), J. Agric. Food Chem., 1992, 40, 1, 111-117, https://doi.org/10.1021/jf00013a021 . [all data]

Kuo and Ho, 1992, 2
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]

Calvo-Gómez, Morales-López, et al., 2004
Calvo-Gómez, O.; Morales-López, J.; López, M.G., Solid-phase microextraction-gas chromatographic-mass spectrometric analysis of garlic oil obtained by hydrodistillation, J. Chromatogr. A, 2004, 1036, 1, 91-93, https://doi.org/10.1016/j.chroma.2004.02.072 . [all data]

Nielsen, Larsen, et al., 2004
Nielsen, G.S.; Larsen, L.M.; Poll, L., Formation of aroma compounds during long-term frozen storage of unblanched leek (Allium ampeloprasum Var. Bulga) as affected by packaging atmosphere and slice thickness, J. Agric. Food Chem., 2004, 52, 5, 1234-1240, https://doi.org/10.1021/jf0306183 . [all data]

Nielsen and Poll, 2004
Nielsen, G.S.; Poll, L., Determination of odor active aroma compounds in freshly cut leek (Allium ampeloprasum Var. Bulga) and in long-term stored frozen unblanched and blanched leek slices by gas chromatography olfactometry analysis, J. Agric. Food Chem., 2004, 52, 6, 1642-1646, https://doi.org/10.1021/jf030682k . [all data]

Nielsen, Larsen, et al., 2003
Nielsen, G.S.; Larsen, L.M.; Poll, L., Formation of aroma compounds and lipoxygenase (EC 1.13.11.12) activity in unblanced leek (Allium ampeloprasum Var. Bulga) slices during long-term frozen storage, J. Agric. Food Chem., 2003, 51, 7, 1970-1976, https://doi.org/10.1021/jf020921o . [all data]

Whitfield, Mottram, et al., 1988
Whitfield, F.B.; Mottram, D.S.; Brock, S.; Puckey, D.J.; Salter, L.J., Effect of Phospholipid on the Formation of Volatile Heterocyclic Compounds in Heated Aqueous Solutions of Amino Acids and Ribose, J. Sci. Food Agric., 1988, 42, 3, 261-272, https://doi.org/10.1002/jsfa.2740420309 . [all data]

Yang, Wang, et al., 2004
Yang, Y.; Wang, Z.; Zong, B.; Yang, H., Determination of sulfur compounds in fluid catalytic cracking gasoline by gas chromatography with a sulfur chemiluminiscence detector, Chin. J. Chromatogr., 2004, 22, 3, 216-219. [all data]

Yang, Wang, et al., 2003
Yang, Y.-T.; Wang, Z.; Han. J.-H.; Tian, H.-P.; Yang, H.-Y., Determination of sulfur compounds in gasoline fraction of microreactor products by gas chromatography - Atomic emission detector, Petrochemical Technology (Shiyou Huagong), 2003, 32, 11, 995-998. [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]

Kubec, Velísek, et al., 1997
Kubec, R.; Velísek, J.; Dolezal, M.; Kubelka, V., Sulfur-containing volatiles arising by thermal degradation of alliin and deoxyalliin, J. Agric. Food Chem., 1997, 45, 9, 3580-3585, https://doi.org/10.1021/jf970071q . [all data]

Damste, van Dalen, et al., 1988
Damste, J.S.S.; van Dalen, A.C.K.; de Leeuw, J.W.; Schenck, P.A., Identification of homologous series of alkylated thiophenes, thiolanes, thianes and benzothiophenes present in pyrolisates of sulfur-rich kerogenes, J. Chromatogr., 1988, 435, 435-452, https://doi.org/10.1016/S0021-9673(01)82208-1 . [all data]

Damste, Kock-van Dalen, et al., 1988
Damste, J.S.S.; Kock-van Dalen, A.C.; de Leeuw, J.W.; Schenk, P.A., Identification of homologous series of alkylated thiophenes, thiolanes, thianes and benzothiophenes present in pyrolysates of sulphur-rich kerogens, J. Chromatogr., 1988, 435, 435-452, https://doi.org/10.1016/S0021-9673(01)82208-1 . [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]

Pyun and Shin, 2006
Pyun, M.-S.; Shin, S., Antifungal effects of the volatile oils from Allium plants against Trichophyton species and synergism of the oils with ketoconazole, Phytomedicine, 2006, 13, 6, 394-400, https://doi.org/10.1016/j.phymed.2005.03.011 . [all data]

Shibamoto and Russell, 1977
Shibamoto, T.; Russell, G.F., A study of the volatiles isolated from a D-glucose-hydrogen sulfide-ammonia model system, J. Agric. Food Chem., 1977, 25, 1, 109-112, https://doi.org/10.1021/jf60209a054 . [all data]

Shibamoto and Russell, 1976
Shibamoto, T.; Russell, G.F., Study of meat volatiles associated with aroma generated in a D-glucose-hydrogen sulfide-ammonia model system, J. Agric. Food Chem., 1976, 24, 4, 843-846, https://doi.org/10.1021/jf60206a047 . [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 «gamma»-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]

Jung, Kim, et al., 2001
Jung, E.-J.; Kim, J.-P.; Cho, J.-E.; Lee, J.-W.; Lee, Y.-B.; Kim, W.-J., effect of extraction solvent on volatile compounds of garlic oleoresin, J. Korean Soc. Food Sci. Nutr., 2001, 30, 6, 1033-1037. [all data]


Notes

Go To: Top, Phase change data, Mass spectrum (electron ionization), Gas Chromatography, References