Pyrazine, 2,3-diethyl-5-methyl-
- Formula: C9H14N2
- Molecular weight: 150.2209
- IUPAC Standard InChI: InChI=1S/C9H14N2/c1-4-8-9(5-2)11-7(3)6-10-8/h6H,4-5H2,1-3H3
- IUPAC Standard InChIKey: PSINWXIDJYEXLO-UHFFFAOYSA-N
- CAS Registry Number: 18138-04-0
- 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: 2-Methyl-5,6-diethylpyrazine; 2,3-Diethyl-5-methylpyrazine; 5-Methyl-2,3-diethylpyrazine; 2,3-Diethyl-6-methylpyrazine
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Options:
Van Den Dool and Kratz RI, polar column, custom temperature program
Go To: Top, 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
| Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
|---|---|---|---|---|---|
| Active phase | Supelcowax-10 | Supelcowax-10 | FFAP | Supelcowax-10 | FFAP |
| Column length (m) | 30. | 30. | 25. | 30. | 30. |
| Carrier gas | He | He | He | He | |
| Substrate | |||||
| Column diameter (mm) | 0.25 | 0.25 | 0.32 | 0.25 | 0.32 |
| Phase thickness (μm) | 0.25 | 0.25 | 0.2 | 0.25 | 0.25 |
| Program | 35C(8min) => 4C/min => 60C => 6C/min => 160C => 20C/min => 200C(1min) | 40C(2min) => 40C/min => 60C(2min) => 5C/min => 240C | 40C(1min) => 40C/min => 60C(1min) => 6C/min => 180C => 15C/min => 240C | 40C(2min) => 40C/min => 60(2min)C => 5C/min => 240C | 35C (2min) => 40C/min => 60C (2min) => 6C/min => 180C (5min) => 10C/min => 230C (5min) |
| I | 1492. | 1483. | 1476. | 1483. | 1485. |
| Reference | Bianchi, Careri, et al., 2007 | Majcher and Jelen, 2007 | Frauendorfer and Schieberle, 2006 | Majcher and Jelén, 2005 | Tairu, Hofmann, et al., 2000 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary | Capillary | Capillary | Capillary | Capillary |
|---|---|---|---|---|---|
| Active phase | FFAP | DB-FFAP | FFAP | FFAP | FFAP |
| Column length (m) | 30. | 30. | 30. | 30. | 30. |
| Carrier gas | He | He | He | He | |
| Substrate | |||||
| Column diameter (mm) | 0.32 | 0.32 | 0.32 | 0.32 | 0.32 |
| Phase thickness (μm) | 0.25 | 0.25 | 0.25 | 0.25 | 0.25 |
| Program | 40C(1min) => 40C/min => 60C => 6C/min => 230C | 40C(2min) => 40C/min => 60C(2min) => 6C/min => 230C(10min) | 35C(2min) => 40C/min => 60C(5min) => 6C/min => 230C(15min) | 40C (2min) => 40C/min => 60C (5min) => 6C/min => 230C (15min) | 40C (2min) => 40C/min => 60C (5min) => 6C/min => 230C (15min) |
| I | 1484. | 1479. | 1488. | 1479. | 1479. |
| Reference | Jagella and Grosch, 1999 | Mutti and Grosch, 1999 | Hofmann and Schieberle, 1998 | Hofmann and Schieberle, 1997 | Hofmann and Schieberle, 1997 |
| Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
| Column type | Capillary | Capillary |
|---|---|---|
| Active phase | FFAP | DB-Wax |
| Column length (m) | 30. | 30. |
| Carrier gas | He | He |
| Substrate | ||
| Column diameter (mm) | 0.32 | 0.32 |
| Phase thickness (μm) | 0.25 | 0.25 |
| Program | 40C (2min) => 40C/min => 60C (2min) => 240C (10min) | 35C(2min) => 6C/min => 150C => 30C/min => 240C(1min) |
| I | 1481. | 1487. |
| Reference | Münch, Hofmann, et al., 1997 | Amrani-Hemaimi, Cerny, et al., 1995 |
| Comment | MSDC-RI | MSDC-RI |
References
Go To: Top, Van Den Dool and Kratz RI, polar column, custom temperature program, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Bianchi, Careri, et al., 2007
Bianchi, F.; Careri, M.; Mangia, A.; Musci, M.,
Retention indices in the analysis of food aroma volatile compounds in temperature-programmed gas chromatography: Database creation and evaluation of precision and robustness,
J. Sep. Sci., 2007, 39, 4, 563-572, https://doi.org/10.1002/jssc.200600393
. [all data]
Majcher and Jelen, 2007
Majcher, M.A.; Jelen, H.H.,
Effect of Cysteine and Cystine Addition on Sensory Profile and Potent Odorants of Extruded Potato Snacks,
J. Agric. Food Chem., 2007, 55, 14, 5754-5760, https://doi.org/10.1021/jf0703147
. [all data]
Frauendorfer and Schieberle, 2006
Frauendorfer, F.; Schieberle, P.,
Identification of the key aroma compounds in Cocoa powder based on molecular sensoly correlations,
J. Agr. Food Chem., 2006, 54, 15, 5521-5529, https://doi.org/10.1021/jf060728k
. [all data]
Majcher and Jelén, 2005
Majcher, M.A.; Jelén, H.H.,
Identification of potent odorants formed during the preparation of extruded potato snacks,
J. Agric. Food Chem., 2005, 53, 16, 6432-6437, https://doi.org/10.1021/jf050412x
. [all data]
Tairu, Hofmann, et al., 2000
Tairu, A.O.; Hofmann, T.; Schieberle, P.,
Studies on the key odorants formed by roasting of wild mango seeds (Irvingia gabonensis),
J. Agric. Food Chem., 2000, 48, 6, 2391-2394, https://doi.org/10.1021/jf990765u
. [all data]
Jagella and Grosch, 1999
Jagella, T.; Grosch, W.,
Flavour and off-flavour compounds of black and white pepper ( Piper nigrum L.) I. Evaluation of potent odorants of black pepper by dilution and concentration techniques,
Eur. Food Res. Technol., 1999, 209, 1, 16-21, https://doi.org/10.1007/s002170050449
. [all data]
Mutti and Grosch, 1999
Mutti, B.; Grosch, W.,
Potent odorants of boiled potatoes,
Nahrung, 1999, 43, 5, 302-306, https://doi.org/10.1002/(SICI)1521-3803(19991001)43:5<302::AID-FOOD302>3.0.CO;2-8
. [all data]
Hofmann and Schieberle, 1998
Hofmann, T.; Schieberle, P.,
Identification of key aroma compounds generated from cysteine and carbohydrates under roasting conditions,
Z. Lebensm. Unters. Forsch. A, 1998, 207, 3, 229-236, https://doi.org/10.1007/s002170050324
. [all data]
Hofmann and Schieberle, 1997
Hofmann, T.; Schieberle, P.,
Identification of potent aroma compounds in thermally treated mixtures of glucose/cysteine and rhamnose/cysteine using aroma extract dilution techniques,
J. Agric. Food Chem., 1997, 45, 3, 898-906, https://doi.org/10.1021/jf960456t
. [all data]
Münch, Hofmann, et al., 1997
Münch, P.; Hofmann, T.; Schieberle, P.,
Comparison of key odorants generated by thermal treatment of commercial and self-prepared yeast extracts: influence of the amino acid composition on odorant formation,
J. Agric. Food Chem., 1997, 45, 4, 1338-1344, https://doi.org/10.1021/jf960658p
. [all data]
Amrani-Hemaimi, Cerny, et al., 1995
Amrani-Hemaimi, M.; Cerny, C.; Fay, L.B.,
Mechanisms of formation of alkylpyrazines in the Maillard reaction,
J. Agric. Food Chem., 1995, 43, 11, 2818-2822, https://doi.org/10.1021/jf00059a009
. [all data]
Notes
Go To: Top, Van Den Dool and Kratz RI, polar column, custom temperature program, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.