Isoprene
- Formula: C5H8
- Molecular weight: 68.1170
- IUPAC Standard InChIKey: RRHGJUQNOFWUDK-UHFFFAOYSA-N
- CAS Registry Number: 78-79-5
- 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: 1,3-Butadiene, 2-methyl-; β-Methylbivinyl; Isopentadiene; 2-Methyl-1,3-butadiene; 2-Methylbutadiene; CH2=C(CH3)CH=CH2; 2-Methylbuta-1,3-diene; 3-Methyl-1,3-butadiene; NSC 9237
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Kovats' RI, non-polar column, isothermal
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 | Packed | Capillary |
---|---|---|---|---|---|
Active phase | OV-1 | OV-1 | OV-1 | Squalane | Squalane |
Column length (m) | 25. | 25. | 25. | 2. | 50. |
Carrier gas | He | He | He | He | |
Substrate | Risorb (0.2-0.3 mm) | ||||
Column diameter (mm) | 0.25 | 0.25 | 0.25 | 0.25 | |
Phase thickness (μm) | 0.50 | 0.50 | 0.50 | ||
Temperature (C) | 27. | 30. | 75. | 70. | 50. |
I | 496. | 508. | 506. | 499. | 497.5 |
Reference | Heberger, 1990 | Heberger, 1990 | Heberger, 1990 | Safina, Poznyak, et al., 1989 | Papazova, Milina, et al., 1988 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Capillary | Capillary | Capillary | Capillary | Packed |
---|---|---|---|---|---|
Active phase | SE-30 | Squalane | Squalane | Squalane | Squalane |
Column length (m) | 100. | 100. | 100. | 100. | 15. |
Carrier gas | He | ||||
Substrate | Chromosorb P | ||||
Column diameter (mm) | 0.5 | 0.25 | 0.25 | 0.25 | 0.25 |
Phase thickness (μm) | |||||
Temperature (C) | 80. | 50. | 70. | 27. | 27. |
I | 507. | 497.6 | 491.5 | 495.70 | 496. |
Reference | Bredael, 1982 | Bajus, Veselý, et al., 1979 | Bajus, Veselý, et al., 1979 | Schomburg and Dielmann, 1973 | Hively and Hinton, 1968 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Packed | Packed | Packed | Packed | Packed |
---|---|---|---|---|---|
Active phase | Squalane | Squalane | Squalane | SE-30 | Squalane |
Column length (m) | 15. | 15. | 15. | 7.9 | 10. |
Carrier gas | He | He | He | ||
Substrate | Chromosorb P | Chromosorb P | Chromosorb P | Diatoport S | |
Column diameter (mm) | 0.25 | 0.25 | 0.25 | ||
Phase thickness (μm) | |||||
Temperature (C) | 49. | 67. | 86. | 70. | 26. |
I | 497. | 501. | 501. | 507. | 499. |
Reference | Hively and Hinton, 1968 | Hively and Hinton, 1968 | Hively and Hinton, 1968 | Widmer, 1967 | Zulaïca and Guiochon, 1966 |
Comment | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI | MSDC-RI |
Column type | Packed | Packed |
---|---|---|
Active phase | Apiezon L | Apiezon L |
Column length (m) | 2.25 | 2.25 |
Carrier gas | ||
Substrate | Celite | Celite |
Column diameter (mm) | ||
Phase thickness (μm) | ||
Temperature (C) | 130. | 70. |
I | 514. | 511. |
Reference | Wehrli and Kováts, 1959 | Wehrli and Kováts, 1959 |
Comment | MSDC-RI | MSDC-RI |
References
Go To: Top, Kovats' RI, non-polar column, isothermal, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Heberger, 1990
Heberger, K.,
Identification of C5H8 Isomers Through Reactions of Singlet Methylene, CH2(ã1A1), with Unsaturated Hydrocarbons Using Capillary Gas Chromatography - Mass Spectrometry,
Analyst, 1990, 115, 6, 725-729, https://doi.org/10.1039/an9901500725
. [all data]
Safina, Poznyak, et al., 1989
Safina, L.R.; Poznyak, T.I.; Lisitsyn, D.M.; Kiseleva, E.V.; Kovalev, G.I.,
Selective gas-chromatographic determination of trace unsaturated and aromatic-hydrocarbons in complex-mixtures,
J. Appl. Chem. USSR (Engl. Transl.), 1989, 44, 5, 749-754. [all data]
Papazova, Milina, et al., 1988
Papazova, D.; Milina, R.; Dimov, N.,
Comparative evaluation of retention of hydrocarbons present in the C5-petroleum fraction of methylsilicone and squalane phases,
Chromatographia, 1988, 25, 3, 177-180, https://doi.org/10.1007/BF02316441
. [all data]
Bredael, 1982
Bredael, P.,
Retention indices of hydrocarbons on SE-30,
J. Hi. Res. Chromatogr. Chromatogr. Comm., 1982, 5, 6, 325-328, https://doi.org/10.1002/jhrc.1240050610
. [all data]
Bajus, Veselý, et al., 1979
Bajus, M.; Veselý, V.; Leclercq, P.A.; Rijks, J.A.,
Steam cracking of hydrocarbons. 2. Pyrolysis of methylcyclohexane,
Ind. Eng. Chem. Prod. Res. Dev., 1979, 18, 2, 135-142, https://doi.org/10.1021/i360070a012
. [all data]
Schomburg and Dielmann, 1973
Schomburg, G.; Dielmann, G.,
Identification by means of retention parameters,
J. Chromatogr. Sci., 1973, 11, 3, 151-159, https://doi.org/10.1093/chromsci/11.3.151
. [all data]
Hively and Hinton, 1968
Hively, R.A.; Hinton, R.E.,
Variation of the retention index with temperature on squalane substrates,
J. Gas Chromatogr., 1968, 6, 4, 203-217, https://doi.org/10.1093/chromsci/6.4.203
. [all data]
Widmer, 1967
Widmer, H.,
Gas chromatographic identification of hydrocarbons using retention indices,
J. Gas Chromatogr., 1967, 5, 10, 506-510, https://doi.org/10.1093/chromsci/5.10.506
. [all data]
Zulaïca and Guiochon, 1966
Zulaïca, J.; Guiochon, G.,
Analyse des hauts polymères par chromatographie en phase gazeuse de leurs produits de pyrolyse. II. Application à quelques hydrocarbures macromoléculaires purs,
Bull. Soc. Chim. Fr., 1966, 4, 1351-1363. [all data]
Wehrli and Kováts, 1959
Wehrli, A.; Kováts, E.,
Gas-chromatographische Charakterisierung ogranischer Verbindungen. Teil 3: Berechnung der Retentionsindices aliphatischer, alicyclischer und aromatischer Verbindungen,
Helv. Chim. Acta, 1959, 7, 7, 2709-2736, https://doi.org/10.1002/hlca.19590420745
. [all data]
Notes
Go To: Top, Kovats' RI, non-polar column, isothermal, References
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