Band
Title
646.0 cm-1: ν8 of C4H2 in C4H2 - phase I
Band type
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)
647 ± 2 - - shoulder 0.03 s 10.0
646 ± 2 - - shoulder 0.03 s 95.0
Band assignment #1
Assignment
Label
ν8
Symmetry
unknown
Category
fundamental vibration

Evaluation

Level
partly assigned
Evaluation
undefined
# Multiplicity type Degeneracy Other band
1 mode degeneracy double
Primary specie
C4H2

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
shoulder-tail
Peak
647 ± 2 cm-1 (peak)
Evaluation
validated
Quality
B
Shape
shoulder
Evaluation
undefined
Quality
undefined
Method
baseline corrected peak intensity
Relative intensity
0.03 ± 0.015
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
646 ± 2 cm-1 (peak)
Evaluation
validated
Quality
B
Comments
Khanna_1988 (@70K) => different phase ?
Shape
shoulder
Evaluation
undefined
Quality
undefined
Method
baseline corrected peak intensity
Relative intensity
0.03 ± 0.015
Strength
strong (s)
Evaluation
undefined
Quality
E
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