In database:
525-6500 cm-1
Butene (C4H8)
Molecular weight 56.11 amu
Freezing point -185 C
Boiling point -6.3 C

Infrared cross-sections from PNNL
FTIR infrared cross-sections of 1-Butene from 525 to 6500 cm-1
Data available at 5 C, 25 C, and 50 C
Spectra is composite of on the order of 10 different pressures,backfilled with nitrogen to 760 T.
Images of PNNL data in cm2/molecule vs. wavenumbers
Images of PNNL data in cm2/molecule vs. microns

FTIR infrared cross-sections of 2-Butene from 550 to 6500 cm-1
Data available at 5 C, 25 C, and 50 C
Spectra is composite of on the order of 10 different pressures,backfilled with nitrogen to 760 T.
Images of PNNL data in cm2/molecule vs. wavenumbers
Images of PNNL data in cm2/molecule vs. microns

Additional References
Vacuum Ultraviolet Laser Pulsed Field Ionization Photoelectron Study of Trans-2-Butene; H.K. Woo, K.-C. Lau, J. Zhan, C.Y. Ng, C. Li, W. Li, and P.M. Johnson; J.Chem.Phys. 119:7789-7799 (2003).
Figure 4 showing VUV spectrum from 73600 to 75800 cm-1.

Vacuum Ultraviolet Laser Pulsed Field Ionization Photoelectron Study of Cis-2-Butene; H.K. Woo, J. Zhan, K.-C. Lau, C.Y. Ng, and Y. Cheung; J.Chem.Phys. 116:8803-8808 (2002).
Figure 1 showing VUV spectrum from 73500 to 75400 cm-1.

The Far Infrared Spectrum, Ab Initio Calculations and Conformational Energy Differences of 1-Butene; S. Bell; B.R. Drew, G.A. Guirgis, and J.R. Durig; J.Mol.Struct. 553:199-219 (2000).

VUV-Optical Oscillator Strength Distributions of C3H6 and C4H8 Isomers; H. Koizumi, T. Yoshimi, K. Shinsaka, M. Ukai, M. Morita, Y. Hatano, A. Yagishita, and K. Ito; J.Chem.Phys. 82:4856-4861 (1985).
Figures 6, 8, and 9 showing cross-sections from 300 to 1400 angstroms.

Notes 2-Butene-E 2-Butene-Z 1-Butene
1-Butene, 2-Butene-Z (cis), 2-Butene-E (trans)

cis 1-butene/gauche 1-butene
n1 3089/3089 cm-1 (A') =CH2 antisymmetric stretch
n2 3020/3009 cm-1 (A') =CH2 symmetric stretch
n3 3009/2968 cm-1 (A') CH3 antisymmetric stretch
n4 2999/2968 cm-1 (A') =CH stretch
n5 2917/2917 cm-1 (A') CH3 symmetric stretch
n6 2887/2896 cm-1 (A') >CH2 symmetric stretch
n7 1643/1648 cm-1 (A') C=C stretch
n8 1474/1474 cm-1 (A') CH3 antisymmetric deformation
n9 1443/1449 cm-1 (A') >CH2 scissors
n10 1419/1425 cm-1 (A') >CH2 scissors
n11 1380/1378 cm-1 (A') CH3 symmetric deformation
n12 1347/1319 cm-1 (A') >CH2 wag
n13 1295/1268 cm-1 (A') =CH i.p. bend
n14 1131/1001 cm-1 (A') C-C-C antisymmetric stretch
n15 1017/1073 cm-1 (A') CH3 rock
n16 975/- cm-1 (A') =CH2 i.p. wag
n17 836/854 cm-1 (A') C-C-C symmetric stretch
n18 545/439 cm-1 (A') C=C-C i.p. bend
n19 292/311 cm-1 (A') C-C-C bend
n20 2978/3009 cm-1 (A") CH3 antisymmetric stretch
n21 2935/2948 cm-1 (A") >CH2 antisymmetric stretch
n22 1464/1463 cm-1 (A") CH3 antisymmetric deformation
n23 1266/1263 cm-1 (A") >CH2 antisymmetric twist
n24 1081/790 cm-1 (A") >CH2 antisymmetric rock
n25 994/987 cm-1 (A") =CH2 twist
n26 911/914 cm-1 (A") =CH2 o.p. bend
n27 790/1186 cm-1 (A") CH3 antisymmetric rock
n28 552/636 cm-1 (A") =C-H o.p. bend
n29 276/241 cm-1 (A") CH3 torsion
n30 154/113 cm-1 (A") asymmetric torsion



List of available data for all molecules in database
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