2-Butenoic acid, 3-methyl-
- Formula: C5H8O2
- Molecular weight: 100.1158
- IUPAC Standard InChIKey: YYPNJNDODFVZLE-UHFFFAOYSA-N
- CAS Registry Number: 541-47-9
- Chemical structure:
This structure is also available as a 2d Mol file - Other names: Crotonic acid, 3-methyl-; β-Methylcrotonic acid; β,β-Dimethylacrylic acid; Senecioic acid; 3-Methyl-2-butenoic acid; 3-Methylcrotonic acid; 3,3-Dimethylacrylic acid; (CH3)2C=CHCOOH; β,β-Dimethacrylic acid; Senecic acid; Kyselina 3-methyl-2-butenova; 3-Methylbut-2-enoic acid; NSC 2549; 3-methyl-buten-2-oic-acid
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Gas phase ion energetics data
Go To: Top, Gas Chromatography, References, Notes
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
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Proton affinity (review) | 822.9 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 791.9 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.63 | PE | Holmes, Terlouw, et al., 1979 | LLK |
De-protonation reactions
C5H7O2- + =
By formula: C5H7O2- + H+ = C5H8O2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1447. ± 9.2 | kJ/mol | G+TS | Caldwell, Renneboog, et al., 1989 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1415. ± 12. | kJ/mol | CIDC | Graul, Schnute, et al., 1990 | gas phase; B |
ΔrG° | 1418. ± 8.4 | kJ/mol | IMRE | Caldwell, Renneboog, et al., 1989 | gas phase; B |
Gas Chromatography
Go To: Top, Gas phase ion energetics data, 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
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | HP-101 | 1027. | Milos and Radonic, 2000 | 25. m/0.2 mm/0.2 μm, He, 70. C @ 2. min, 3. K/min, 200. C @ 10. min |
Van Den Dool and Kratz RI, non-polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | VF-5MS | 953. | Tret'yakov, 2007 | 30. m/0.25 mm/0.25 μm, He; Program: Multi-step temperature program; T(initial)=60C; T(final)=270C |
Van Den Dool and Kratz RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 1776. | Cantergiani, Brevard, et al., 2001 | 30. m/0.25 mm/0.25 μm; Program: 20C(30s) => fast => 60C => 4C/min => 220C (20min) |
Normal alkane RI, polar column, temperature ramp
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | CP Wax 52 CB | 1801. | Birtic, Ginies, et al., 2009 | 30. m/0.32 mm/0.50 μm, Helium, 40. C @ 2. min, 4. K/min, 230. C @ 15. min |
Capillary | DB-Wax | 1819. | Moon and Shibamoto, 2009 | 60. m/0.25 mm/0.50 μm, Helium, 40. C @ 5. min, 2. K/min, 210. C @ 70. min |
Capillary | HP-Innowax | 1780. | Wijaya, Ulrich, et al., 2005 | 15. m/0.25 mm/1. μm, 45. C @ 5. min, 10. K/min, 210. C @ 5. min |
Capillary | TC-Wax | 1793. | Suhardi, Suzuki, et al., 2002 | 60. m/0.25 mm/0.25 μm, He, 40. C @ 10. min, 3. K/min, 230. C @ 10. min |
Capillary | Carbowax 20M | 1753. | Kawakami and Kobayashi, 1991 | He, 60. C @ 4. min, 2. K/min; Column length: 50. m; Column diameter: 0.25 mm; Tend: 180. C |
Capillary | FFAP | 1774. | Vernin, Metzger, et al., 1988 | He, 60. C @ 5. min, 2. K/min; Column length: 50. m; Column diameter: 0.28 mm; Tend: 240. C |
Capillary | DB-Wax | 1804. | Andersen J.F., Mikolajczak K.L., et al., 1987 | Helium, 40. C @ 1. min, 6. K/min; Column length: 30. m; Column diameter: 0.32 mm; Tend: 200. C |
Normal alkane RI, polar column, custom temperature program
Column type | Active phase | I | Reference | Comment |
---|---|---|---|---|
Capillary | DB-Wax | 1802. | Gonzalez-Rios, Suarez-Quiroz, et al., 2007 | 30. m/0.25 mm/0.25 μm, Hydrogen; Program: 44 0C 3 0C/min -> 170 0C 8 0C/min -> 250 0C |
Capillary | DB-Wax | 1776. | Gonzalez-Rios, Suarez-Quiroz, et al., 2007 | 30. m/0.25 mm/0.25 μm, Hydrogen; Program: not specified |
References
Go To: Top, Gas phase ion energetics data, Gas Chromatography, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Holmes, Terlouw, et al., 1979
Holmes, J.L.; Terlouw, J.K.; Vijfhuizen, P.C.; A'Campo, C.,
Metastable ion studies XII-Molecular and fragment ion structures for isomeric C4H6O2 acids,
Org. Mass Spectrom., 1979, 14, 204. [all data]
Caldwell, Renneboog, et al., 1989
Caldwell, G.; Renneboog, R.; Kebarle, P.,
Gas Phase Acidities of Aliphatic Carboxylic Acids, Based on Measurements of Proton Transfer Equilibria,
Can. J. Chem., 1989, 67, 4, 661, https://doi.org/10.1139/v89-092
. [all data]
Graul, Schnute, et al., 1990
Graul, S.T.; Schnute, M.E.; Squires, R.R.,
Gas-Phase Acidities of Carboxylic Acids and Alcohols from Collision-Induced Dissociation of Dimer Cluster Ions,
Int. J. Mass Spectrom. Ion Proc., 1990, 96, 2, 181, https://doi.org/10.1016/0168-1176(90)87028-F
. [all data]
Milos and Radonic, 2000
Milos, M.; Radonic, A.,
Gas chromatography mass spectral analysis of free and glycosidically bound volatile compounds from Juniperus oxycedrus L. growing wild in Croatia,
Food Chem., 2000, 68, 3, 333-338, https://doi.org/10.1016/S0308-8146(99)00192-2
. [all data]
Tret'yakov, 2007
Tret'yakov, K.V.,
Retention Data. NIST Mass Spectrometry Data Center., NIST Mass Spectrometry Data Center, 2007. [all data]
Cantergiani, Brevard, et al., 2001
Cantergiani, E.; Brevard, H.; Krebs, Y.; Feria-Morales, A.; Amadò, R.; Yeretzian, C.,
Characterisation of the aroma of green Mexican coffee and identification of mouldy/earthy defect,
Eur. Food Res. Technol., 2001, 212, 6, 648-657, https://doi.org/10.1007/s002170100305
. [all data]
Birtic, Ginies, et al., 2009
Birtic, S.; Ginies, C.; Causse, M.; Renard, C.M.G.C.; Page, D.,
Changes in volatiles and glycosides during fruit maturartion of two contrasted tomato (Solanum lycopersicum) lines,
J. Agric. Food Chem., 2009, 57, 2, 591-598, https://doi.org/10.1021/jf8023062
. [all data]
Moon and Shibamoto, 2009
Moon, J.-K.; Shibamoto, T.,
Role of roasting conditions in the profile of volatile flavor chemicals formed from coffee beans,
J. Agric. Food Chem., 2009, 57, 13, 5823-5831, https://doi.org/10.1021/jf901136e
. [all data]
Wijaya, Ulrich, et al., 2005
Wijaya, C.H.; Ulrich, D.; Lestari, R.; Schippel, K.; Ebert, G.,
Identification of potent odorants in different cultivars of snake fruit [Salacca zalacca (Gaert.) Voss] using gas chromatography-olfactometry,
J. Agric. Food Chem., 2005, 53, 5, 1637-1641, https://doi.org/10.1021/jf048950h
. [all data]
Suhardi, Suzuki, et al., 2002
Suhardi, S.; Suzuki, M.; Yoshida, K.; Muto, T.; Fujita, A.; Watanbe, N.,
Changes in the volatile compounds and in the chemical and physical properties of snake fruit (Salacca edulis Reinw) Cv. Pondoh during maturation,
J. Agric. Food Chem., 2002, 50, 26, 7627-7633, https://doi.org/10.1021/jf020620e
. [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]
Vernin, Metzger, et al., 1988
Vernin, G.; Metzger, J.; Obretenov, T.; Suon, K.-N.; Fraisse, D.,
GC/MS (EI,PCI,SIM)-data bank analysis of volatile compounds arising from thermal degradation of glucose-valine amadori intermediates
in Flavors and Fragrances: A World Perspective. Proceedings of the 10th International Congress of Essential Oils, Fragrances and Flavors, Lawrence,B.M.; Mookherjee,B.D.; Willis,B.J., ed(s)., Elsevier, New York, 1988, 999-1028. [all data]
Andersen J.F., Mikolajczak K.L., et al., 1987
Andersen J.F.; Mikolajczak K.L.; Reed D.K.,
Analysis of peach bark volatiles and their electroantennogram activity with lesser pechtree borer, Synanthedon pictipes (Grote and Robinson),
J. Chem. Ecol., 1987, 13, 11, 2103-2114, https://doi.org/10.1007/BF01012874
. [all data]
Gonzalez-Rios, Suarez-Quiroz, et al., 2007
Gonzalez-Rios, O.; Suarez-Quiroz, M.L.; Boulanger, R.; Barel, M.; Guyot, B.; Guiraud, J.-P.; Schorr-Galindo, S.,
Impact of ecological post-harvest processing of coffee aroma: II Roasted coffee.,
J. Food Composition Analysis, 2007, 20, 3-4, 297-307, https://doi.org/10.1016/j.jfca.2006.12.004
. [all data]
Notes
Go To: Top, Gas phase ion energetics data, Gas Chromatography, References
- Symbols used in this document:
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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