Band
Title
51870.0 cm-1: a 3Πr ← X 1Σ⁺ (2,0) of 12C16O in natural CO - phase alpha
Type
absorption
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
a 3Πr ← X 1Σ⁺ (2,0) intervalence charge transfer 12C16O CO 12C⁻≡ 16O⁺ site degeneracy double site
Characteristics summary
Peak position
(cm-1)
Center position
(cm-1)
Width
(cm-1)
Shape Asymmetry factor Peak intensity
(cm-1)
Peak intensity relative Peak strength Integrated intensity
(cm-2)
Integrated intensity relative Integrated strength Temperature
(K)
Pressure
(bar)
51870 ± 30 - 512 ± 10 0.33 20.0
Label
a 3Πr ← X 1Σ⁺ (2,0)
Category
electronic transition
Method
comparison with gas phase

Evaluation

Level
fully assigned
Evaluation
validated
Comments
Cameron system, (ν',ν”) = (5,0)
# Multiplicity type Degeneracy Other band
1 site degeneracy double site
Contribution comments
crystal field splitting (Davidov splitting) possibly seen on this band
Primary specie
12C16O
Comments
probably degenerated/strongly blended contributions from site A and E

Electronic modes

Label (type)
a 3Πr ← X 1Σ⁺ (intervalence charge transfer)

Vibration modes

Label (type)
1 (stretching)       Bond: 12C⁻≡ 16O⁺
Comments
(ν',ν”) = (2,0)

Temperature

Temperature
20.0 ± 2.0 K
Method #1
spectrum measurement
Overlap
moderately blended
Peak
51870 ± 30 cm-1 (unknown)
Evaluation
validated
Quality
E
FWHM
512 ± 10 cm-1 (fwhm)
Evaluation
validated
Quality
E
Method
peak intensity
Relative intensity
0.33 ± 0.05
Evaluation
validated
Quality
D
Comments
intensity relative to the strongest band of the series at 48400 cm-1 (206.6 nm)