In database:
550-6500 cm-1
Allene (CH2CCH2) (propadiene)
Molecular weight 40.0646 g/mole
Freezing point -136.5 C
Boiling point -34.5 C

Infrared cross-sections from PNNL
FTIR infrared cross-sections 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

Other References
High Resolution Infrared Study of the n11 Band of Allene; S. Nissen, F. Hegelund, M.S. Johnson, and B. Nelander; J.Mol.Spec. 216:197-202 (2002).
Figs. 1 and 3 showing data around 342 and 345 cm-1

Allene n9 and n10: Low-Temperature Measurements of Line Intensity; W.F. Wang, J.M. Sirota, and D.C. Reuter; J.Mol.Spec. 194:256-268 (1999).
Figs. 1 and 2 showing data around 1002 and 887 cm-1

Notes ch2cch2
Fundamental frequencies from NIST Chemistry Webbook
n1 3015 cm-1 (a1) CH2 stretch
n2 1443 cm-1 (a1) CH2 scis
n3 1073 cm-1 (a1) CC stretch
n4 865 cm-1 (b1) CH2 twist
n5 3007 cm-1 (b2) CH2 stretch
n6 1957 cm-1 (b2) CC stretch
n7 1398 cm-1 (b2) CH2 scis
n8 3086 cm-1 (e) CH2 stretch
n9 999 cm-1 (e) CH2 rock
n10 841 cm-1 (e) CH2 wag
n11 355 cm-1 (e) CCC deform

List of available data for all molecules in database
Return to front page