Band
Title
660.0 cm-1: ν8 of C4H2 in C4H2 - phase I
Type
absorption
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
ν8 unknown bending out-p C4H2 C4H2 -C ≡ C-H mode degeneracy double
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)
661 ± 1 - - undefined 0.015 s 10.0
660 ± 1 - - sharp shoulder 0.015 s 95.0
Label
ν8
Symmetry
unknown
Category
fundamental vibration

Evaluation

Level
partly assigned
Evaluation
undefined
# Multiplicity type Degeneracy Other band
1 mode degeneracy double

Vibration modes

Label (type)
ν8 (bending out-p)       Bond: -C ≡ C-H
Texture
film

Temperature

Temperature
10.0 ± 1.0 K
Comments
annealed to 70-110K
Method #1
spectrum measurement
Overlap
strongly blended
Peak
661 ± 1 cm-1 (peak)
Evaluation
validated
Quality
B
Shape
undefined
Evaluation
undefined
Quality
undefined
Method
baseline corrected peak intensity
Relative intensity
0.015 ± 0.006
Strength
strong (s)
Evaluation
undefined
Quality
E
Texture
film

Temperature

Temperature
95.0 ± 1.0 K
Comments
annealed to 70-110K
Method #1
spectrum measurement
Overlap
shoulder-tail
Peak
660 ± 1 cm-1 (peak)
Evaluation
validated
Quality
B
Comments
Khanna_1988 (@70K) has different shape + shift of double band (653-663 cm-1) compared to Zhou_2009 (660-674 cm-1) => different phase ?
Shape
sharp shoulder
Evaluation
undefined
Quality
undefined
Method
baseline corrected peak intensity
Relative intensity
0.015 ± 0.006
Strength
strong (s)
Evaluation
undefined
Quality
E