Band
Title
770.0 cm-1: ν5 of C2H2 in C2H2 - Metastable phase
Band type
Type
absorption
Assignments summary
Assignment Symmetry Mode Specie(s) Molecule/Atom Bond Multiplicity Degeneracy Contribution Resonance
ν5 bending sym. out-p (wagging) C2H2 C2H2 -C ≡ C-H no
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)
770 ± 3 - - broad shoulder 0.15 vs 50.0
Band assignment #1
Assignment
Label
ν5
Category
fundamental vibration

Evaluation

Level
partly assigned
Evaluation
validated
# Multiplicity type Degeneracy Other band
1 no
Primary specie
C2H2

Vibration modes

Label (type)
ν5 (bending sym. out-p (wagging))       Bond: -C ≡ C-H
Comments
C#C-H wagging
Texture
film

Temperature

Temperature
50.0 ± 5.0 K
Formation temperature
12.0 K
Temperature max
50.0 K
Method #1
spectrum measurement
Overlap
shoulder-tail
Peak
770 ± 3 cm-1 (estimated)
Evaluation
undefined
Quality
C
Shape
broad shoulder
Evaluation
undefined
Quality
undefined
Method
estimated
Relative intensity
0.15 ± 0.05
Strength
very strong (vs)
Evaluation
undefined
Quality
E
Method
width x peak intensity
Evaluation
validated
Quality
undefined
Publications